P0730 on Ford: How to Diagnose & Fix
Incorrect Gear Ratio
5 Ford models · 6 documented issues · 5 critical · $100-$4,500 repair
P0730 on Ford by model: symptoms, diagnosis and fix
The DPS6 PowerShift 6-speed dual-clutch automated transmission fitted to 2012-2018 Ford Focus (and 2011-2019 Fiesta) is widely considered one of the worst transmission designs in modern automotive history. The dry dual-clutch design was fundamentally unsuited for stop-and-go driving, producing violent shuddering during low-speed acceleration, hesitation when pulling away from stops, unexpected surging, and abrupt harsh shifts. The Vargas class action alleged that Ford knew of the defects from the start and kept selling the cars; it resulted in a settlement covering 2012-2016 Focus and 2011-2016 Fiesta models. Ford issued dozens of TSBs and software reflashes that repeatedly failed to fix the underlying mechanical problem. The TCM (Transmission Control Module) failures are a distinct but related issue. Repair options include clutch replacement (temporary fix), TCM reprogramming, or complete transmission replacement.
Common Symptoms
- Violent shuddering or juddering when accelerating from a stop
- Transmission hesitates or refuses to move in Drive for 1-3 seconds
- Unexpected lurch forward when releasing brakes at low speed
- Grinding or clunking between gear changes
- Transmission surging and jerking during low-speed driving
- Vehicle bucks and shakes at 15-35 mph (clutch slip zone)
- Transmission warning light or "Transmission Fault" message
- Loss of drive in one or both gears
- Delayed engagement from Park to Drive
How to Fix
Check fordtransmissionsettlement.com for class action settlement eligibility. Ford extended its warranty coverage to pay for repeated repairs. The updated clutch service part for the Focus is F1FZ-7B546-B, which replaces BV6Z-7B546-F. Clutch shudder repair per TSB 16-0109; TCM repair/replacement per TSB 16-0129 and program 14M02. Dealers can recalibrate the software with the IDS tool. The most lasting fix is a remanufactured DPS6 transmission. Many owners chose to pursue buyback via state Lemon Laws. The Vargas settlement class stops at the 2016 model year, so 2017-2018 owners are not covered by it.
Sources for this issue (3)
Complaints show a recurring pattern of automatic transmission failure on early Escapes, including harsh shifting, no movement in Drive, slipping, grinding, and in severe cases unexpected gear changes. Some owners report the transmission suddenly shifting abnormally at highway speed or losing the ability to stay in Park, creating both drivability and rollaway concerns.
Common Symptoms
- Vehicle will not move in Drive
- Harsh or incorrect shifting
- Grinding noise from front/transmission area
- Transmission slips or changes gears unexpectedly
- Vehicle will not stay in Park
How to Fix
Diagnosis should include checking transmission fluid condition, shift cable/bushing integrity, range selector operation, and internal transmission damage. Repairs range from replacing the shift cable bushing or linkage to a full transmission rebuild/replacement if there is internal gear or clutch failure. Costs typically run from $100-$350 for linkage repairs up to $2,500-$4,500 for a remanufactured transmission installation.
Sources for this issue (3)
The Power Transfer Unit (PTU) on AWD Ford Edge models is known for chronic fluid leaks from the axle shaft seals and PTU cover seal. The PTU (transfer case equivalent) lacks a drain plug and Ford originally specified "lifetime fill" fluid, leading many owners to never service it. When the seal leaks and fluid level drops, the PTU runs dry and destroys itself. Ford issued TSB 09-25-7 for 2007-2010 models, and the issue persists through 2018 with TSB 18-2255 for later versions. Seal failure typically occurs between 60,000-100,000 miles and is common in AWD models. A destroyed PTU can also damage the rear axle and differential.
Common Symptoms
- Dark black gear-oil leak near the right-side front axle / PTU intermediate shaft seal
- Grinding, howling, or whining noise from drivetrain
- Vibration during acceleration, especially from stops
- AWD malfunction warning light
- Burning gear oil smell
- Low fluid level in PTU (check port on PTU body)
- Clunking on hard acceleration
How to Fix
Replace PTU axle shaft seal kit (Ford seal kit includes intermediate shaft seal, alignment washer, deflector, and seal protector tool). Complete PTU rebuild or replacement if run dry. Proactive maintenance: change PTU fluid every 30,000-40,000 miles using Ford-spec fluid (Motorcraft SAE 75W-140 Synthetic Rear Axle Lubricant, XY-75W140-QL, per TSB 18-2255). PTU fluid capacity is approximately 0.5-0.8 quarts depending on year.
Sources for this issue (2)
The 8F35 eight-speed replaced the 6F35 in the Edge for 2019. Ford bulletin 21-2081 covers 2019-2021 Edges with the 8F35 built on or before March 11, 2021 that may shudder, buck or jerk while driving up to 35 mph, attributing the condition to PCM software and correcting it by reprogramming the PCM and transmission solenoid strategy. This is separate from the 6F35 harsh-shift complaint on earlier Edges.
Common Symptoms
- Shudder, buck or jerk while driving up to 35 mph
How to Fix
If your Edge has the 8F35 transmission, was built on or before March 11, 2021, and shudders, bucks or jerks below 35 mph, ask a Ford dealer to apply bulletin 21-2081 (or its current replacement). The dealer reprograms the PCM and loads the correct transmission solenoid strategy. Expect firmer shifts for several days afterward while the transmission relearns. If symptoms persist or other faults appear, the vehicle needs further diagnosis; the bulletin does not call for a fluid exchange or torque converter replacement.
Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.
Sources for this issue (4)
- Transmission shudder - Edge ST - Ford Edge Forumforum
- edge 8F35 transmission - Ford Truck Enthusiasts Forumsforum
- Ford TSB: 8F35 Transmission - Shudder/Buck/Jerk While Driving Up To 35 MPH (NHTSA document)tsb
- 8F35 Transmission - Shudder/Buck/Jerk Up To 35 MPH - 2019-2021 Ford Edge & Lincoln Nautilustsb
The 4R70W (and later 4R75W/4R75E) 4-speed automatic behind the 4.2L V6 and 4.6L/5.4L V8s is prone to several high-mileage failures: a broken reverse (cast) band that produces a loud POP and loss of reverse; a cracked forward-clutch drum snap-ring groove on 2005+ units causing loss of ALL forward gears while reverse still works; worn overdrive band and clutches causing slipping; and solenoid-body/servo wear causing harsh or erratic shifts. Failures accelerate under towing/heavy loads and when fluid changes are neglected.
Common Symptoms
- No reverse engagement or a loud pop then loss of reverse
- Truck has reverse but no forward movement (2005+ forward-drum failure)
- Slipping or flaring on 1-2/2-3 upshifts
- Delayed or harsh engagement into Drive
- Overdrive slipping under load
- Limp mode (stuck in one gear)
How to Fix
Diagnose fluid condition (burnt smell, metal), line pressure, and DTCs before teardown. Repair typically means a full rebuild with upgraded forward drum/snap ring, new bands, updated solenoid pack, and torque converter; add an auxiliary transmission cooler if the truck tows. Regular fluid/filter service (Mercon V) is the main preventive measure.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Forward clutch drum (upgraded, forged) — Sonnax Smart-TechCross-refSonnax 76654-01K, TCS Smart-Tech 76654-01K, Sonnax 76655-01K (high-capacity kit version)$250–$300
This is the fix for the 2005+ failure mode described in the issue: the OE stamped drum cracks at the snap-ring groove and the truck loses ALL forward gears while reverse still works. The Sonnax replacement is one-piece forged with a deep…
- Auxiliary transmission oil cooler (tow duty)Cross-refTru-Cool Max LPD4739 (40,000 GVW, low pressure drop, thermal, Tru-Cool LPD47391 / OC-4739-1, Hayden / Derale stacked-plate equivalents$100–$165
Universal-fit add-on, not a year- or engine-specific part — this is the 'add an auxiliary cooler if the truck tows' half of the documented fix, and the cheapest insurance against a repeat failure.
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Sources for this issue (2)
The 6F35 six-speed automatic is prone to harsh, banging, or delayed shifts (most often 2-3 and 3-4) plus a shudder/vibration when the torque converter clutch locks up at a steady 40-60 mph cruise. Root causes are worn valve-body separator-plate O-rings and bores that can no longer hold clean line pressure, clogged/worn shift solenoids, and torque-converter clutch degradation. Many units develop symptoms well before 100,000 miles. A 2021 class-action lawsuit (Gant v. Ford) accused Ford of concealing the 6F35 defect on the Fusion; the cited December 2024 report says the suit was dismissed.
Common Symptoms
- Hard/banging upshifts especially 2nd-to-3rd
- Shudder or vibration cruising at 40-60 mph
- Delayed engagement into drive or reverse
- Slipping or flaring between gears
- Transmission overheating warning
How to Fix
Start with a full fluid-and-filter service using the correct Mercon LV. For confirmed harsh shifts, reman or updated valve body with new solenoids is the durable fix; TCC shudder that survives a flush usually requires torque-converter replacement. Verify the transmission calibration is up to date (Ford released updated shift-strategy PCM/TCM reflashes). Severe internal wear = rebuild or reman transmission.
Sources for this issue (2)
P0730 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0730 mean on a Ford?
P0730 stands for "Incorrect Gear Ratio." This code means the transmission computer detected that the actual gear ratio (calculated from input vs. output shaft speeds) does not match what it should be for the commanded gear. In other words, the transmission isn't delivering the correct gear, which often shows up as slipping, flaring RPM during shifts, or being stuck in the wrong gear. It can stem from internal mechanical wear, low or contaminated fluid, or faulty solenoids and sensors. The vehicle may shift harshly or enter limp mode. On Ford it is documented across 5 models: Focus, Escape, Edge, F-150, Fusion.
What are the most common causes of P0730?
The most common causes of P0730 are: Low or contaminated transmission fluid, Worn clutches or bands (internal slipping), Faulty shift solenoids, Dirty or sticking valve body, Faulty input or output speed sensor, Internal hydraulic/line pressure problems, Torque converter problems, General high-mileage transmission wear. The specific cause varies by vehicle.
How much does it cost to fix P0730 on a Ford?
Published repair estimates on Ford range from $100 to $4,500 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0730 on a different make?
View P0730 across all makes →Join 700+ subscribers following Au7o for vehicle insights and updates.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.