What is the 2015-2020 Ford Transit Electric Power Steering (EPAS) Assist Loss / Steering Fault Warnings?

NHTSA complaints include intermittent or sudden loss of power steering assist with warning messages, making the van difficult to steer at low speeds. Reports often describe the issue occurring after a restart, during parking maneuvers, or intermittently with electrical/communicat… Repairs typically run $250-$3,200. Severity: critical.

What is the 2020-2024 Ford Transit 10R80 (10-speed) Harsh/Delayed Shifts and Shudder (Software/Valve Body Related)?

Later Transits equipped with the 10R80 10-speed automatic have documented owner complaints of harsh 1-2/2-3 shifts, delayed engagement, and occasional shudder. Ford has issued multiple service communications/TSBs across Ford platforms using the 10R80 addressing shift quality via… Repairs typically run $250-$3,200. Severity: high.

2015-2024 Ford Transit Problems: 25 Issues Every Owner Should Know

2015-2024 model years · 7,605+ owner reports · Updated May 2026

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According to Au7o's analysis of 7,605+ owner reports, the 2015-2024 Ford Transit has 25 documented known issues, with 13 rated critical. The most serious are 3.5L EcoBoost Twin Turbocharger Failure ($1,200-$3,500 repair), Fuel Injector Failure and Rough Running (EcoBlue Diesel) ($300-$2,500 repair), 3.5L EcoBoost First-Gen Timing Chain Stretch and Rattle ($1,500-$4,500 repair), Front Brake Caliper Sticking / Premature Pad and Rotor Wear ($150-$900 repair), Body Control Module (BCM) Failure Causing Intermittent Electrical Gremlins ($300-$1,200 repair), PCM/ECM Software Calibration Causing Stall or No-Start After Refueling, 10R80 (10-speed) Harsh/Delayed Shifts and Shudder (Software/Valve Body Related) ($250-$3,200 repair), Cooling System Degas Bottle (Coolant Reservoir) Cracking/Leak Leading to Overheating ($150-$600 repair), . Across all issues, repair costs range from $50 to $4,500. at .

All 25 Known Issues

When Issues Typically Appear

3.5L EcoBoost First-Gen Timing Chain Stretch and Rattle

5K-8K

10R80 (10-speed) Harsh/Delayed Shifts and Shudder (Software/Valve Body Related)

5K-60K

PCM/ECM Software Calibration Causing Stall or No-Start After Refueling

15K-80K

Front Brake Caliper Sticking / Premature Pad and Rotor Wear

20K-80K

NOx Sensor / SCR DEF System Faults Causing Reduced Power (2.0L EcoBlue Diesel)

20K-120K

Instrument Cluster / Speedometer Erratic Readings and Gauge Dropout

20K-90K

Sliding Door Track/Roller Wear Causing Binding, Noise, or Door Not Closing

20K-120K

Turbocharger Boost Pressure Sensor / MAP Sensor Failure (2.0L EcoBlue)

25K-90K

Body Control Module (BCM) Failure Causing Intermittent Electrical Gremlins

30K-100K

6R80 Transmission Torque Converter Shudder at Light Throttle

30K-100K

Rear HVAC Line/Expansion Valve Leaks (Dual A/C) Causing Loss of Refrigerant

30K-120K

3.5L EcoBoost Twin Turbocharger Failure

30K-46K

050K100K150K200K mi

Community Reported

1,200 owners

On the 2015-2024 Ford Transit EcoBoost 3.5, the Ford Transit 350/350 HD with the 3.5L EcoBoost twin-turbocharged V6 experiences turbocharger failures from inadequate lubrication, carbon buildup in the turbo housings, wastegate actuator failure, and turbo bearing wear. OMS AutoParts and Autodoc document common Transit turbo problems including loss of power, turbo lag, unusual whistling/whining/grinding noises, and excessive smoke. The commercial use of Transit vans (frequent stop-and-go, high idle hours, heavy loads) accelerates turbo wear beyond what passenger vehicle applications typically experience. FordTransitUSAForum.com documents a case of turbo and manifold failure at 38,000 miles on a 3.5L EcoBoost Transit 350. RepairPal estimates turbocharger assembly replacement between $1,650 and $2,210 depending on the Transit model variant.

This issue also affects: Audi A3, Audi A6, Audi A8

Common Symptoms

Loss of power or reduced boost
Excessive turbo lag (slow boost response)
Whistling, whining, or grinding noise from turbo area
Excessive blue or black smoke from exhaust
Check engine light with boost-related codes
Oil leak from turbo drain or feed lines
Burning oil smell from engine bay
Reduced fuel economy

How to Fix

For wastegate actuator failures (most common turbo issue): replacement of the actuator alone ($200-400) may resolve boost control issues without full turbo replacement. For internal turbo bearing failure or impeller damage, complete turbo replacement is required. RepairPal estimates $1,650-2,210 for turbo assembly replacement. For Transit commercial vehicles, change oil every 5,000 miles (not the factory 10k interval) and allow 30-60 seconds of idle time before shutdown after sustained driving to allow turbo bearing oil to circulate. Never shut off a hot turbocharged engine immediately after towing or hard driving.

What Owners Are Using

Parts and tips from 1,200+ owners who fixed this issue

TipFor commercial Transit vans with the 3.5L EcoBoost: change oil every 5,000 miles maximum, NOT the 10,000 mile factory interval. Commercial stop-and-go driving with heavy loads degrades oil faster than the oil life monitor predicts. Clean oil is the #1 factor in turbo longevity.
NoteNever shut off a turbocharged Transit immediately after towing, highway driving, or heavy load. Let it idle for 30-60 seconds to allow oil to circulate through the turbo bearings as they cool. Immediate shutdown allows residual heat to "coke" the oil in the turbo bearings, accelerating wear.
UpgradeTurbo gasket kit prevents boost leaks and oil seepage at the turbo flanges (Dorman Turbocharger Gasket Kit)
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UpgradeBoost gauge helps monitor turbo performance and catch problems early (AutoMeter Mechanical Boost Gauge)
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Typical repair cost:$1,200 - $3,500

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Medium Confidence1,200 reportsLast reported by owners Feb 2026Reviewed Feb 2026

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870 owners

On the 2015-2018 Ford Transit 3.5L EcoBoost V6, the first-generation 3.5L EcoBoost (2011-2016) used in the 2015-2017 Ford Transit 350/350 HD with the twin-turbocharged V6 is known for premature timing chain stretch. The single-chain-per-bank design (two chains total) stretches as the links wear individually, causing the chain to effectively grow longer. A stretched chain causes VCT timing correlation codes, cold-start rattling, rough idle, and eventual jumped timing. Ford revised the 3.5L EcoBoost design in 2017 to use dual chains per bank (four total), which substantially resolved the stretch issue. Transit vans used for commercial/fleet service with high-idle hours accumulate chain wear faster than typical passenger vehicles. The F150 EcoBoost Forum documents thousands of cases of this specific 3.5L chain issue and contains multiple long-running troubleshooting threads.

This issue also affects: Buick Enclave, Buick Encore, Buick LaCrosse

Common Symptoms

Cold-start rattle from engine (first 2-5 seconds on startup)
Check engine light with P0016, P0017, P0020, P0021 (cam-crank timing correlation)
Rough idle, especially when cold
Poor fuel economy
Engine hesitation or stumble
Loss of power under acceleration
Drivability issues that worsen over time

How to Fix

Complete timing chain replacement required: both primary chains, all guides, and tensioners must be replaced simultaneously. In 2017+, Ford redesigned to dual-chain design which resolved the issue. Remanufactured short block or long block replacement is an option for high-mileage engines if chain guides have also failed. Use only 5W-30 full synthetic and change every 5,000-7,500 miles. Labor: 10-14 hours on Transit due to engine mount complexity.

What Owners Are Using

Parts and tips from 870+ owners who fixed this issue

NoteWhen replacing the timing chain on a 1st-gen 3.5L EcoBoost Transit, replace ALL chains, ALL guides, and ALL tensioners at the same time. Reusing worn guides with a new chain causes the new chain to wear rapidly and fail again within 20,000-30,000 miles.
TipFord redesigned the 3.5L EcoBoost with dual chains per bank starting in MY 2017. If you have a 2015-2016 Transit 350 with the 3.5L EB and it currently has no rattle, consider replacing the chain as preventive maintenance at 80,000-100,000 miles regardless.
TipUse only 5W-30 full synthetic oil in the 3.5L EcoBoost Transit. Change it every 5,000 miles - the extended oil life monitor intervals are NOT appropriate for high-load commercial van use. Clean oil is the #1 factor in chain longevity on this engine.
UpgradeComplete timing chain kit includes chains, guides, and tensioners (Cloyes Timing Chain Kit)
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UpgradeHigh-quality engine oil is critical after timing service (Castrol Edge Full Synthetic Motor Oil)
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Typical repair cost:$1,500 - $4,500

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High Confidence870 reportsLast reported by owners Sep 2025Reviewed Feb 2026

Community Reported

120 owners

On the 2015-2019 Ford Transit 3.7L Ti-VCT, owners report sudden loss of power with a wrench light and reduced throttle response, often while cruising or accelerating. NHTSA complaints and Ford service information describe electronic throttle body internal faults (TPS/actuator) that can trigger ETC failsafe and limp mode on 3.7L Ti-VCT Transits. The condition may be intermittent at first and then become frequent, especially with heat/soak and higher mileage.

This issue also affects: Ford Explorer, Ford Freestyle, Ford Transit Connect

Common Symptoms

Wrench light / 'See Manual' message
Sudden reduced power / limp mode
Poor throttle response or no acceleration
Rough idle or stalling when coming to a stop
Intermittent ETC-related DTCs

How to Fix

Replace the electronic throttle body assembly and perform throttle/PCM relearn. Common service fix is throttle body replacement (Ford throttle body assembly; part number varies by year/engine calibration) and inspection/cleaning of throttle connector pins and harness strain relief.

Typical repair cost:$350 - $900

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Medium Confidence120 reportsLast reported by owners Invalid DateReviewed Apr 2026

On the 2015-2022 Ford Transit 3.5L EcoBoost V6, the 3.5L EcoBoost twin-turbo Transit models experience wastegate actuator sticking, particularly on the passenger-side turbo. Carbon buildup and heat cycling cause the wastegate pivot to seize, resulting in either overboosting (wastegate stuck closed) or underboosting (stuck open). Overboosting triggers an immediate limp mode with reduced power. The issue is more prevalent in Transit vans used for towing or heavy cargo loads that keep the turbos under sustained high heat.

This issue also affects: Audi A3, Audi A6, Audi A8

Common Symptoms

Limp mode / reduced engine power warning
Check engine light with boost-related codes
Turbo whistle or flutter noise changes character
Loss of power under acceleration
Audible metallic rattle from turbo area at idle

How to Fix

First attempt: remove the wastegate actuator arm and clean the pivot with PB Blaster, then exercise it through full range of motion. Apply high-temp anti-seize to the pivot. If the pivot is corroded beyond cleaning, replace the wastegate actuator assembly ($200-400 per side). In severe cases, the entire turbocharger must be replaced. Preventive maintenance: exercise the wastegate linkage every oil change and avoid extended idle periods that promote carbon buildup.

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

TipBefore spending $2,000+ on new turbos, try the cleaning method first. Remove the wastegate actuator vacuum line, spray the pivot with PB Blaster, and work the arm back and forth. 70% of the time this fixes the limp mode issue for another 20-30k miles.
UpgradeTurbo gasket kit prevents boost leaks and oil seepage at the turbo flanges (Dorman Turbocharger Gasket Kit)
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UpgradeBoost gauge helps monitor turbo performance and catch problems early (AutoMeter Mechanical Boost Gauge)
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Typical repair cost:$200 - $2,500

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95 owners

On the 2020-2023 Ford Transit, the 2.0L EcoBlue diesel Transit has a documented pattern of boost pressure sensor and manifold absolute pressure (MAP) sensor failures, causing incorrect boost readings fed to the ECM. When the sensor fails or reads out of range, the ECM defaults to a conservative fueling map, reducing power significantly and triggering a check engine light. This issue is noted in multiple European market TSBs and has been replicated in North American Transit owners' forums with the same engine.

This issue also affects: Audi A3, Audi A6, Audi A8

Common Symptoms

Noticeable reduction in engine power or sluggish acceleration
Check engine light with boost-related fault codes
Excessive black smoke from exhaust under load
Turbo appears to not build boost pressure
Poor fuel economy compared to baseline

How to Fix

Replace the boost pressure/MAP sensor located on the intake manifold. Ford part number for the 2.0L EcoBlue MAP sensor is approximately 2 235 233 (or Motorcraft DY-1297). Clearing the fault and re-testing boost response is required after replacement. ECM recalibration via Ford FDRS may be needed if a learned adaptation table has been skewed by the faulty sensor data.

Typical repair cost:$80 - $350

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Medium Confidence95 reportsLast reported by owners Invalid DateReviewed May 2026

On the 2015-2024 Ford Transit, the Ford Transit aluminum oil pan is prone to drain plug thread stripping, especially in vehicles serviced at quick-lube shops or with frequent oil changes. The aluminum pan threads are softer than the steel drain plug, and over-torquing or cross-threading during routine oil changes permanently damages the threads. Once stripped, the drain plug leaks oil or falls out entirely, potentially causing catastrophic engine damage from oil starvation.

This issue also affects: BMW X2, Cadillac CT5, Cadillac Escalade

Common Symptoms

Oil dripping from drain plug area after oil change
Drain plug feels loose or wobbles
Oil spots on ground under engine
Low oil pressure warning after recent service
Drain plug cannot be tightened properly

How to Fix

For minor thread damage: install a Time-Sert or Helicoil thread repair insert (M14x1.5 for most Transit models). This is a permanent repair that is actually stronger than the original threads. For severe damage: replace the oil pan ($200-400 for the pan plus 2-3 hours labor). Prevent recurrence by always hand-threading the drain plug first, then torquing to exactly 20 ft-lbs (not more). Use a new crush washer at every oil change.

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

NoteNEVER let a quick-lube shop use an impact gun on your Transit oil drain plug. The aluminum pan threads strip easily. Hand-thread the plug in, then torque to exactly 20 ft-lbs. If a shop stripped your threads, a Time-Sert M14x1.5 repair kit ($35) creates threads stronger than original.
UpgradeReplacement oil pan gasket seals leaks at the bottom of the engine (Fel-Pro Oil Pan Gasket Set)
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Typical repair cost:$50 - $800

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950 owners

On the 2017-2023 Ford Transit, the 2017-2023 Ford Transit with the 2.0L EcoBlue diesel engine (available in some markets) and the 3.5L EcoBoost V6 experience fuel injector failures causing rough running, misfires, poor idle, reduced performance, and excessive smoke on cold start. Parkers UK documents an official Ford service action for Transit EcoBlue diesel injector failures traced to a quality issue with Continental-supplied injectors where an internal surface coating comes unstuck, blocking the injector. FordTransitUSAForum.com documents injector failure on 3.5L EcoBoost Transit models as well, where direct injection fuel deposits cause injector spray pattern degradation. RepairPal estimates individual injector replacement between $266 and $627 depending on Transit model, but multiple injectors often need replacement simultaneously, and contaminated fuel systems can cost significantly more.

This issue also affects: Buick LeSabre, Buick Park Avenue, Buick Encore

Common Symptoms

Rough running and engine misfires
Poor idle quality
Excessive blue or black smoke on cold start
Reduced engine performance and power
Check engine light with injector or misfire codes
Engine stalls immediately after starting
High fuel consumption
Engine hesitation under acceleration

How to Fix

For Transit 3.5L EcoBoost: replace failed injectors ($100-200 per injector, 3-4 hours labor). Consider replacing all 6 injectors if the vehicle has over 100k miles - if one has failed, others are likely close behind. For EcoBlue diesel: Ford issued a service action for Continental injector failures - check with dealer for coverage. Use only Top Tier gasoline and change fuel filters per schedule. Professional fuel system cleaning every 50,000 miles can extend injector life.

What Owners Are Using

Parts and tips from 950+ owners who fixed this issue

TipWhen replacing injectors on the 3.5L EcoBoost Transit, consider replacing all 6 at once if the vehicle has over 100k miles. Individual injectors are $100-200 each, and if one has failed from deposit buildup, the others are likely degraded too. It saves labor to do them all at once.
UpgradeBosch fuel injector set — OEM replacement for precise fuel delivery (Bosch Fuel Injector)
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UpgradeChevron Techron fuel injector cleaner — restores injector flow (Chevron Techron Fuel Injector Cleaner)
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Typical repair cost:$300 - $2,500

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Medium Confidence950 reportsLast reported by owners Feb 2026Reviewed Feb 2026

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180 owners

On the 2015-2021 Ford Transit, ford Transit owners, particularly those with the 3.5L EcoBoost and 3.7L V6, have reported stalling or no-start conditions immediately after refueling due to fuel vapor purge system calibration issues within the PCM. The evaporative emission canister purge valve and PCM calibration can cause an overly rich condition when the purge valve opens after a full fill-up, flooding the intake and stalling the engine. Ford issued TSB 21-2299 addressing PCM reprogramming to correct the purge flow logic.

This issue also affects: Dodge Journey, Chrysler 300, Ford Focus

Common Symptoms

Engine stalls immediately after filling fuel tank
Hard start or no-start condition after refueling
Strong fuel smell from engine bay after fill-up
Rough idle following fueling event
P0441 or P0443 EVAP-related codes stored

How to Fix

Reprogram the PCM/ECM with updated Ford calibration per TSB 21-2299. In some cases, the EVAP canister purge valve (Motorcraft CM-5085 or equivalent) also requires replacement. Dealer scan tool (IDS/FDRS) is required for the reflash procedure.

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Medium Confidence180 reportsLast reported by owners Invalid DateReviewed May 2026

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320 owners

On the 2015-2023 Ford Transit, front brake calipers on the Ford Transit, especially the heavy-duty variants (350 and 350HD), are prone to sticking due to corrosion of the caliper slide pins and guide bolts. The high gross vehicle weight combined with stop-and-go commercial use accelerates heat buildup, which bakes the slide pin grease and causes the pins to seize. This results in one pad wearing far faster than the other, warped rotors, and a persistent pulling sensation during braking. NHTSA has received numerous complaints on this issue across 2015–2022 model years.

Common Symptoms

Vehicle pulling to one side during braking
Premature or uneven pad and rotor wear on one side
Burning smell from front wheel area after driving
Brake drag or reduced fuel economy
Squealing or grinding noise from front brakes at low mileage

How to Fix

Remove front calipers and thoroughly clean and re-lubricate or replace slide pins using high-temperature caliper grease (Motorcraft XG-3 or equivalent). Replace worn pads and rotors as a set. In severe seizure cases, replace the entire caliper assembly (Motorcraft BICF-141 or equivalent). Inspect and replace rubber slide pin boots if cracked or torn.

Typical repair cost:$150 - $900

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Medium Confidence320 reportsLast reported by owners Invalid DateReviewed May 2026

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70 owners

On the 2015-2019 Ford Transit, owner complaints and service reports document vacuum pump oil leaks that can reduce available brake assist and/or create oil seepage on the engine. The mechanical vacuum pump seals can leak, and in some cases vacuum output drops, leading to a harder brake pedal especially after repeated stops. This is most often reported on gasoline Transits using an engine-driven vacuum pump for brake booster assist.

This issue also affects: Ford Transit Connect, Ford F-150

Common Symptoms

Hard brake pedal / reduced brake assist
Oil leak near vacuum pump area
Hissing/vacuum noise
Longer stopping distance feel
Brake warning messages in some cases

How to Fix

Test vacuum output and inspect for oil leakage at the vacuum pump and gasket. Replace the vacuum pump and seal/gasket as needed, clean contaminated areas, and verify brake booster operation and vacuum reserve after repair.

Typical repair cost:$350 - $1,100

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Medium Confidence70 reportsLast reported by owners Invalid DateReviewed Apr 2026

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210 owners

On the 2015-2020 Ford Transit, ford Transit BCMs, particularly on 2015–2019 models, have been reported to fail or develop software faults causing a wide array of seemingly unrelated electrical issues including random door lock cycling, instrument cluster malfunctions, and accessory power loss. Water intrusion from sunroof drains or cowl leaks can accelerate BCM failure by corroding the module's internal connectors. Ford TSB 18-2175 acknowledged BCM programming faults contributing to some of these behaviors.

This issue also affects: Dodge Magnum, Ford Mustang Mach-E, Cadillac Escalade ESV

Common Symptoms

Random door locks cycling or activating on their own
Instrument cluster warning lights illuminating without cause
Power windows or accessories becoming inoperative intermittently
Battery drain or parasitic draw
Multiple unrelated fault codes stored across modules

How to Fix

Diagnose with Ford IDS/FDRS scan tool to identify BCM fault codes. If water intrusion is present, address the leak source first. BCM replacement (Ford part number varies by configuration, ~$300–$500 OEM) and programming/configuration to the vehicle using Ford PATS and IDS is required. In some cases, a BCM software update alone resolves the issue.

Typical repair cost:$300 - $1,200

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Medium Confidence210 reportsLast reported by owners Invalid DateReviewed May 2026

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175 owners

On the 2015-2022 Ford Transit, multiple Ford Transit owners and fleet operators have reported the instrument cluster exhibiting erratic speedometer behavior, gauge dropouts, and spontaneous warning light illumination without stored fault codes corresponding to the indicated faults. The issue is linked to a faulty instrument cluster circuit board or intermittent loss of communication between the cluster and the vehicle's CAN bus network. Ford issued TSB 20-2253 related to instrument cluster display concerns on 2020–2021 Transit models, and earlier model years have similar complaints documented in NHTSA's database.

This issue also affects: Chevrolet Impala, Audi Q5 Sportback, Ford Fusion

Common Symptoms

Speedometer needle sweeping erratically or reading zero while moving
Warning lights (ABS, airbag, check engine) illuminating and extinguishing randomly
Fuel gauge or temperature gauge showing incorrect readings
Total cluster blackout while driving
U-code network communication fault codes stored

How to Fix

Diagnose CAN bus communication using Ford IDS/FDRS to identify any U-code network faults. Inspect cluster connector pins for corrosion or pushed-back terminals. In confirmed cluster failure cases, replace the instrument cluster assembly (Ford part number varies by configuration and trim; must be programmed to vehicle VIN). TSB 20-2253 recommends module reprogramming as a first step before hardware replacement.

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Medium Confidence175 reportsLast reported by owners Invalid DateReviewed May 2026

On the 2015-2022 Ford Transit, ford Transit vans experience premature alternator failure, often between 50,000-80,000 miles. The internal voltage regulator fails first, causing undercharging or overcharging conditions. Commercial Transit vans with aftermarket upfitter packages (extra lighting, inverters, refrigeration units) are particularly susceptible due to sustained high electrical loads. Symptoms often start as intermittent battery warnings before progressing to a no-start condition.

This issue also affects: Audi Q5 Sportback, Cadillac ELR, Cadillac Escalade ESV

Common Symptoms

Battery warning light illuminated
Dimming headlights or interior lights
Electrical accessories cutting out intermittently
Battery repeatedly dying overnight
Whining noise from alternator area that changes with RPM
Voltage gauge reading below 13.5V or above 15V

How to Fix

Replace the alternator assembly with a high-output unit (250A) if the vehicle has aftermarket electrical loads, or OEM replacement (220A) for stock configurations. Always replace the serpentine belt and tensioner at the same time. Test the battery — a failing battery can cause alternator overwork and premature failure. For vans with upfitter packages, install a dual-battery isolator system to prevent alternator overload.

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

TipIf you have ANY aftermarket electrical loads (work lights, inverter, refrigeration), upgrade to a 250A alternator and add a dual-battery system with an isolator. The stock 220A alternator was not designed for sustained high-draw accessories and will fail repeatedly.
UpgradeHigh-performance AGM battery with excellent cold cranking amps and deep cycle capability (Optima RedTop AGM Battery)
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UpgradeOEM-quality replacement battery with reliable performance (ACDelco Professional AGM Battery)
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UpgradeAutomatic battery maintainer to prevent parasitic drain issues during storage (Battery Tender Junior 12V Battery Charger Maintainer)
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UpgradeOEM-quality remanufactured alternator with high output for reliable charging (Denso Remanufactured Alternator)
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UpgradePremium rebuilt alternator backed by extensive warranty coverage (Remy Premium Remanufactured Alternator)
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UpgradeOEM-quality starter motor for reliable engine cranking (Denso Starter Motor)
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UpgradeRemanufactured starter with gear reduction for improved cranking performance (Remy Remanufactured Starter Motor)
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UpgradeDirect-fit window regulator assembly with motor for easy installation (Dorman Power Window Regulator and Motor Assembly)
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Typical repair cost:$400 - $1,000

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On the 2015-2020 Ford Transit, ford Transit models equipped with the 6R80 6-speed automatic transmission are prone to a torque converter clutch (TCC) shudder felt as a vibration or flutter between approximately 40–55 mph during light throttle cruise conditions. The issue is caused by degradation of the transmission fluid's friction modifier additives, which are necessary for smooth TCC lockup engagement on the Ford-spec Mercon LV fluid. Ford issued TSB 16-0094 specifically addressing this shudder condition on the Transit and other Mercon LV-equipped vehicles.

Common Symptoms

Vibration or shudder felt through the vehicle body at 40–55 mph
Condition occurs specifically during light throttle cruise, not acceleration
Shudder disappears when accelerating or coasting
Symptom worsens as transmission fluid degrades with mileage
No fault codes typically stored (perceived as road vibration by owners)

How to Fix

Perform a complete transmission fluid drain and refill using fresh Ford Mercon LV fluid (Motorcraft XT-10-QLVC). Ford TSB 16-0094 recommends this as the first step. In persistent cases, a friction modifier additive (Ford Motorcraft Friction Modifier XT-11-QDC) can be added. If shudder persists after fluid service, torque converter replacement may be required.

Typical repair cost:$100 - $1,800

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Medium Confidence260 reportsLast reported by owners Invalid DateReviewed May 2026

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130 owners

On the 2015-2023 Ford Transit, ford Transit rear leaf springs and their associated U-bolts have been reported to crack, fatigue, or break outright on high-roof and extended-length variants that are operated at or near maximum payload, particularly in commercial fleet service. The high static load combined with road impacts can cause individual spring leaves to crack and the U-bolts clamping the spring to the axle to loosen or fracture. This is noted in multiple NHTSA complaints and fleet maintenance records as a recurring maintenance item on work vans with 150,000+ miles.

Common Symptoms

Audible clunking or banging from rear axle area under load
Vehicle sits noticeably lower on one side at rear
Visible crack or separation in leaf spring pack
Rear axle shifts laterally under hard acceleration or braking
Vibration felt through floor at highway speeds when loaded

How to Fix

Inspect rear leaf spring assemblies and U-bolts during every major service interval on loaded vehicles. Replace cracked or fatigued spring leaves with OEM Ford spring assemblies or heavy-duty aftermarket equivalents (e.g., Deaver or National Spring). Replace U-bolts (Ford part number KK3Z-5586-A) whenever springs are disturbed. Torque U-bolt nuts to Ford specification (typically 129–174 Nm depending on variant).

Typical repair cost:$350 - $1,200

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Medium Confidence130 reportsLast reported by owners Invalid DateReviewed May 2026

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145 owners

On the 2015-2022 Ford Transit, the Ford Transit uses a twin I-beam or independent front suspension with radius arm bushings that are known to wear or crack prematurely, especially in high-mileage commercial fleets or when the vehicle is operated at or near maximum payload regularly. Worn bushings cause the front axle geometry to shift, leading to rapid and uneven tire wear, vague steering, and a pronounced clunking noise over bumps. This is a documented issue in NHTSA complaints and Transit owner forums, particularly on 2015–2020 models used for delivery service.

Common Symptoms

Clunking or banging noise from front suspension over bumps
Rapid or uneven front tire wear
Vague or wandering steering feel
Visible cracking or deformation of rubber bushing material
Vehicle pulling to one side during braking

How to Fix

Replace front radius arm bushings. OEM Ford bushing kit (part number BK3Z-3B203-A or updated revision) should be used. Some owners opt for aftermarket polyurethane bushing upgrades (e.g., Energy Suspension kits) for improved durability. Labor typically involves pressing old bushings out and pressing new ones in with a hydraulic press.

Typical repair cost:$200 - $600

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Medium Confidence145 reportsLast reported by owners Invalid DateReviewed May 2026

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140 owners

On the 2015-2020 Ford Transit, nHTSA complaints and owner reports describe coolant loss from the plastic degas bottle/reservoir cracking or leaking at seams, causing low coolant warnings and overheating if not caught early. Heat cycling and plastic aging can lead to hairline cracks that only leak under pressure. Drivers often notice a sweet smell, visible coolant residue, or repeated low coolant level.

This issue also affects: Alfa Romeo Giulia, BMW Z3, Cadillac Catera

Common Symptoms

Low coolant level / repeated top-offs
Coolant smell in engine bay
Visible coolant residue around reservoir
Engine temperature rises/overheating
Heater performance fluctuates due to air in system

How to Fix

Pressure-test the cooling system and replace the degas bottle/reservoir and cap if leaking; refill with the correct Motorcraft coolant and bleed air per Ford procedure. Inspect hoses and the thermostat housing area for secondary leaks and verify fan operation.

Typical repair cost:$150 - $600

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Medium Confidence140 reportsLast reported by owners Invalid DateReviewed Apr 2026

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60 owners

On the 2018-2023 Ford Transit 2.0L EcoBlue, ecoBlue diesel Transits have documented owner reports of check engine lights and emissions system warnings related to SCR/DEF operation, commonly tied to NOx sensor faults or SCR efficiency monitoring. When the system detects persistent faults, it may trigger reduced power or countdown-to-no-start strategies depending on market/calibration. These issues are frequently accompanied by emissions-related DTCs and can be intermittent before becoming persistent.

This issue also affects: Audi Q7, Chevrolet Silverado 3500HD, Dacia Duster

Common Symptoms

Check engine light with emissions warnings
Reduced power / limp mode
DEF/SCR warning messages
Increased DEF consumption or abnormal dosing behavior
Potential countdown-to-no-start (market dependent)

How to Fix

Diagnose SCR system with a capable scan tool, verify DEF quality, check wiring/connectors at NOx sensors, and replace failed NOx sensor(s) as indicated; perform required resets/adaptations. If applicable per Ford service guidance, update PCM calibration addressing false SCR/NOx diagnostics and confirm proper dosing operation.

Typical repair cost:$350 - $1,800

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Medium Confidence60 reportsLast reported by owners Invalid DateReviewed Apr 2026

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2,140 owners

On the 2015-2024 Ford Transit, ford Transit vans are well-known for water infiltration through the roof, particularly in medium-roof and high-roof configurations. Water intrudes through multiple paths: (1) factory roof plug holes (the 2015 roof has 16 plugged holes for optional roof rack and ancillary hardware), (2) roof rack mounting holes where Ford applies only primer circles without top-coat paint, (3) push-pin trim clips along the roof/wall junction, and (4) blocked windshield gutter channels that direct water into the engine bay instead of away from the vehicle. The rust issue is compounded by thin steel roofs and inadequate factory corrosion protection. The FordTransitUSAForum has extensive documentation of roof rust appearing within 3-5 years on vans operating in salt-belt states (Northeast, Midwest). For conversion van owners, water leaks can ruin expensive interior buildouts.

This issue also affects: Ford Edge, Ford Expedition, Ford Focus

Common Symptoms

Water inside cargo area after rain, especially at roof/wall junction
Water in cab during heavy rain
Rust bubbles or surface rust appearing on roof panel
Water stains on headliner or cargo area ceiling
Wet floor mats from water entering through gutter area
Musty smell inside van
Water in engine compartment during rain (blocked windshield gutters)

How to Fix

Preventive sealing: seal all roof plug holes with Dicor lap sealant or Eternabond RV roof tape immediately after purchase. Clean and seal all roof rack mounting holes with rust-inhibiting primer and clear coat. Inspect and clear windshield gutter drains annually. Apply rust-inhibiting undercoat to roof panel interior annually in salt-belt climates. For existing rust: wire brush, treat with Rust-Oleum Rust Reformer, apply self-etching primer, then paint. Dicor 501LSW or Eternabond tape are the most popular roof repair products among Transit owners.

What Owners Are Using

Parts and tips from 2,140+ owners who fixed this issue

TipSeal ALL roof holes immediately when you take delivery of a new Transit - before water gets in. Use Dicor 501LSW lap sealant or Eternabond EternaBond-WS-4 tape. On 2015 models, you have 16 factory plug holes to address. This is widely considered the most important first mod for Transit van owners.
TipClear your windshield gutter drains every spring - debris blocks them and water pours into the engine bay instead. The gutter runs along the bottom of the windshield and has drain holes at each corner fender. This is a 10-minute maintenance item that prevents expensive water damage.
NoteIn Rust Belt states (NY, MA, PA, OH, MI, MN, WI, etc.), apply a rust inhibitor to the underside of the roof panel from inside the van before any buildout. Ford's factory rust protection on the roof is minimal. NH Rust Check, Fluid Film, or Rust-Oleum Automotive Rust Reformer are popular choices.
UpgradePOR-15 rust preventive coating stops rust permanently (POR-15 Rust Preventive Coating)
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UpgradeRust-Oleum rust converter spray for treating corroded panels (Rust-Oleum Rust Converter Spray)
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UpgradeDupli-Color touch-up paint kit for scratch and chip repair (Dupli-Color Touch-Up Paint Kit)
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UpgradeDupli-Color clear coat finish for paint protection (Dupli-Color Clear Coat Spray)
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Typical repair cost:$50 - $3,500

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High Confidence2,140 reportsLast reported by owners Dec 2025Reviewed Feb 2026

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160 owners

On the 2015-2024 Ford Transit, nHTSA complaints and fleet/owner reports commonly cite the Transit sliding door becoming difficult to open/close, popping, grinding, or failing to latch. Wear in the center roller/hinge and track hardware can cause misalignment, especially on high-use cargo vans. The problem often worsens over time and can lead to the door not fully closing or reopening after latching.

This issue also affects: Ford Transit Connect

Common Symptoms

Sliding door binds or requires excessive force
Grinding/popping noise from door track
Door won’t latch or reopens after closing
Visible sag/misalignment at rear of sliding door
Uneven door gaps

How to Fix

Inspect and replace worn center roller/hinge assemblies and damaged track components; realign the sliding door per Ford body service procedure and lubricate tracks with the specified lubricant. Replace any bent track brackets and verify latch operation and striker alignment.

Typical repair cost:$200 - $1,200

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Medium Confidence160 reportsLast reported by owners Invalid DateReviewed Apr 2026

On the 2015-2024 Ford Transit, the Ford Transit rear-wheel-drive models develop axle shaft oil seal leaks at the rear differential, allowing gear oil to weep past the axle seals onto the brake backing plates and brake shoes/pads. The leak is often slow enough to go unnoticed until a rear brake inspection reveals oil-soaked components. In severe cases, contaminated rear brakes cause pulling to one side under braking, which is a significant safety concern for loaded vans.

Common Symptoms

Oil residue visible on inside of rear wheels
Rear brakes feel spongy or pull to one side
Gear oil smell near rear axle
Oil spots on brake backing plate
Low rear differential fluid level

How to Fix

Replace the rear axle shaft oil seals (both sides recommended even if only one is leaking). Remove the axle shaft, clean the axle tube bore, and install new seals using a seal driver to ensure proper depth. Inspect rear brake shoes/pads and drums/rotors for oil contamination — replace if soaked. Top off the differential with 75W-140 synthetic gear oil to the fill plug level. Check the differential vent hose for blockage, which causes internal pressure buildup and accelerates seal failure.

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

NoteIf your axle seal has been leaking long enough to contaminate the rear brake shoes or pads, they MUST be replaced. Oil-soaked friction material cannot be cleaned or restored — it will always have reduced stopping power and may cause the van to pull dangerously under hard braking.
UpgradeRoyal Purple Max-Gear differential fluid for superior protection (Royal Purple Max-Gear Differential Fluid)
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UpgradeDorman differential cover gasket — direct OE replacement (Dorman Differential Cover Gasket)
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UpgradeTRQ CV axle assembly — complete replacement with new joints (TRQ CV Axle Assembly)
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UpgradeDorman CV boot kit to prevent grease loss and joint failure (Dorman CV Boot Kit)
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Typical repair cost:$250 - $700

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On the 2015-2023 Ford Transit, long-wheelbase and extended-length Transit models (T-250, T-350, T-350 HD) with two-piece driveshafts develop carrier bearing (center support bearing) failure. The rubber isolator deteriorates and the bearing wears, causing vibrations at highway speeds (50-70 mph) and a prominent clunking noise when shifting between drive and reverse. The issue is accelerated by frequent payload at or near GVWR. The vibration is often misdiagnosed as a tire balance issue.

This issue also affects: Ford F-150

Common Symptoms

Vibration at highway speeds (50-70 mph)
Clunk when shifting from drive to reverse
Rumbling or grinding noise from under vehicle
Vibration worsens under load
Visible rubber deterioration on center bearing mount

How to Fix

Replace the driveshaft center support bearing assembly (carrier bearing, rubber mount, and bracket as a unit). Ford part CK4Z-4R602-D for long-wheelbase models. The driveshaft must be properly phased during reinstallation — mark both halves and the carrier bearing bracket position before removal. Failure to maintain proper phasing causes NVH issues. Torque the carrier bearing bracket bolts to 52 ft-lbs.

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

NoteMARK the driveshaft phasing before removal. Use paint marks on both driveshaft sections and the carrier bracket relative to the frame crossmember. Installing a driveshaft out of phase creates a vibration that no amount of balancing will fix.
UpgradeSpicer U-joint — OEM supplier for most domestic vehicles (Spicer Universal Joint)
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UpgradeAnchor carrier bearing for driveshaft vibration fix (Anchor Driveshaft Carrier Bearing)
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Typical repair cost:$300 - $800

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90 owners

On the 2015-2022 Ford Transit, transits equipped with rear A/C (dual HVAC) have documented complaints of repeated refrigerant loss and poor cooling, often traced to leaks at rear A/C lines, fittings, or rear expansion valve connections. Corrosion, vibration, and seal degradation can lead to slow leaks that are hard to find without dye or electronic leak detection. Owners typically notice rear cooling performance dropping first, then the entire system stops cooling.

This issue also affects: Chevrolet Suburban, Chrysler 200, Dodge Ram Van

Common Symptoms

Rear A/C warm while front still cool
A/C stops cooling entirely over time
Hissing near rear HVAC unit or lines
Oily residue at A/C fittings/lines
Repeated need for refrigerant recharge

How to Fix

Leak-test the system, repair/replace leaking rear A/C lines or rear expansion valve seals/components as needed, then evacuate and recharge to specification. Replace any corroded line sections and install updated seals where applicable; verify condenser fan operation and system pressures after repair.

Typical repair cost:$300 - $1,800

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Frequently Asked Questions

What are the most common Ford Transit problems?

According to Au7o's analysis of 7,605+ owner reports, the 2015-2024 Ford Transit has 25 documented issues. The most frequently reported are: 3.5L EcoBoost Twin Turbocharger Failure, Fuel Injector Failure and Rough Running (EcoBlue Diesel), 3.5L EcoBoost First-Gen Timing Chain Stretch and Rattle. Of these, 13 are rated critical and should be addressed promptly.

Is the Ford Transit reliable?

The 2015-2024 Ford Transit has 25 known issues documented across 7,605+ owner reports. 13 issues are rated critical: 3.5L EcoBoost Twin Turbocharger Failure and Fuel Injector Failure and Rough Running (EcoBlue Diesel) and 3.5L EcoBoost First-Gen Timing Chain Stretch and Rattle and Front Brake Caliper Sticking / Premature Pad and Rotor Wear and Body Control Module (BCM) Failure Causing Intermittent Electrical Gremlins and PCM/ECM Software Calibration Causing Stall or No-Start After Refueling and 10R80 (10-speed) Harsh/Delayed Shifts and Shudder (Software/Valve Body Related) and Cooling System Degas Bottle (Coolant Reservoir) Cracking/Leak Leading to Overheating and Rear Leaf Spring U-Bolt and Spring Pack Fatigue / Breakage and 3.7L Ti-VCT Throttle Body Failure / Electronic Throttle Control (ETC) Limp Mode and Brake Vacuum Pump Oil Leak / Reduced Brake Assist (3.5L EcoBoost & 3.7L) and NOx Sensor / SCR DEF System Faults Causing Reduced Power (2.0L EcoBlue Diesel) and Turbo Wastegate Actuator Sticking Causing Limp Mode. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Ford Transit problems?

Repair costs for known Ford Transit issues range from $50 to $4,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, 3.5L EcoBoost Twin Turbocharger Failure, typically costs $1,200-$3,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What year Ford Transit is the most reliable?

Reliability varies across model years of the Ford Transit. Based on documented issues, problems are most commonly reported in earlier model years. Au7o recommends checking the specific known issues for your target year before purchasing, and having a pre-purchase inspection performed by a qualified mechanic. Our known issues database covers the 2015-2024 Ford Transit with 25 documented issues documented across 7,605+ owner reports.

All 25 Known Issues

When Issues Typically Appear

2015-2024 Ford Transit: 3.5L EcoBoost Twin Turbocharger Failure#

Common Symptoms

How to Fix

What Owners Are Using

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2015-2018 Ford Transit: 3.5L EcoBoost First-Gen Timing Chain Stretch and Rattle#

Common Symptoms

How to Fix

What Owners Are Using

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2015-2019 Ford Transit: 3.7L Ti-VCT Throttle Body Failure / Electronic Throttle Control (ETC) Limp Mode#

Common Symptoms

How to Fix

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2015-2022 Ford Transit: Turbo Wastegate Actuator Sticking Causing Limp Mode#

Common Symptoms

How to Fix

What Owners Are Using

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2020-2023 Ford Transit: Turbocharger Boost Pressure Sensor / MAP Sensor Failure (2.0L EcoBlue)#

Common Symptoms

How to Fix

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2015-2024 Ford Transit: Oil Pan Drain Plug Thread Stripping#

Common Symptoms

How to Fix

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2017-2023 Ford Transit: Fuel Injector Failure and Rough Running (EcoBlue Diesel)#

Common Symptoms

How to Fix

What Owners Are Using

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2015-2021 Ford Transit: PCM/ECM Software Calibration Causing Stall or No-Start After Refueling#

Common Symptoms

How to Fix

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2015-2023 Ford Transit: Front Brake Caliper Sticking / Premature Pad and Rotor Wear#

Common Symptoms

How to Fix

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2015-2019 Ford Transit: Brake Vacuum Pump Oil Leak / Reduced Brake Assist (3.5L EcoBoost & 3.7L)#

Common Symptoms

How to Fix

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2015-2020 Ford Transit: Body Control Module (BCM) Failure Causing Intermittent Electrical Gremlins#

Common Symptoms

How to Fix

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2015-2022 Ford Transit: Instrument Cluster / Speedometer Erratic Readings and Gauge Dropout#

Common Symptoms

How to Fix

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2015-2022 Ford Transit: Alternator Premature Failure and Voltage Regulator Issues#

Common Symptoms

How to Fix

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2020-2024 Ford Transit: 10R80 (10-speed) Harsh/Delayed Shifts and Shudder (Software/Valve Body Related)#

Common Symptoms

How to Fix

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2015-2020 Ford Transit: 6R80 Transmission Torque Converter Shudder at Light Throttle#

Common Symptoms

How to Fix

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2015-2023 Ford Transit: Rear Leaf Spring U-Bolt and Spring Pack Fatigue / Breakage#

Common Symptoms

How to Fix

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2015-2022 Ford Transit: Front Suspension Radius Arm Bushing Premature Wear and Cracking#

Common Symptoms

How to Fix

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2015-2020 Ford Transit: Cooling System Degas Bottle (Coolant Reservoir) Cracking/Leak Leading to Overheating#

Common Symptoms

How to Fix

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