P0742 on Ford: How to Diagnose & Fix
Torque Converter Clutch Circuit Stuck On
5 Ford models · 5 documented issues · 1 critical · $200-$7,000 repair
P0742 on Ford by model: symptoms, diagnosis and fix
The 10R80 10-speed automatic transmission can develop a shudder during light acceleration, typically between 25-50 mph. This is caused by torque converter clutch issues and affects many F-150s. Ford has released multiple TSBs to address related concerns, including PCM reprogramming for harsh shifts (TSB 18-2274) and main control valve body replacement for a sticking torque converter clutch valve (TSB 20-2117).
Common Symptoms
- Shudder during light acceleration
- Harsh or jerky shifts
- Vibration between 25-50 mph
- Clunk when shifting at low speeds
- Shudder disappears under heavy throttle
How to Fix
Perform transmission fluid flush with Motorcraft Mercon ULV. Adaptive learning reset via FORSCAN or dealer may help. Multiple fluid changes sometimes needed. Check for applicable TSBs: Ford TSB 18-2274 reprograms the PCM for harsh shifts on 2018 trucks built on or before 15-May-2018, and TSB 20-2117 replaces the main control valve body on 2017-2018 trucks built on or before 20-Nov-2017 with DTCs P0741/P1744 caused by a sticking torque converter clutch valve.
Sources for this issue (2)
The 10R80 10-speed automatic transmission exhibits issues including harsh or jerky shifting, gear hunting (constantly searching for the right gear), hesitation during acceleration, unexpected downshifts, and transmission whining. The transmission's aluminum outer shells can develop divots where clutches stick, causing erratic shifts. Multiple class-action lawsuits have been filed.
Common Symptoms
- Harsh or jerky shifts
- Transmission hunting between gears
- Hesitation during acceleration
- Unexpected hard downshifts
- Whining noise from transmission
- Rough engagement from stop
How to Fix
Ford has released software updates through dealer reprogramming that can improve shift quality. Ensure transmission fluid is at proper level and condition. For persistent issues, valve body replacement or transmission replacement may be required ($3,000-7,000).
Sources for this issue (2)
The 10R80 10-speed automatic transmission can develop a shudder during light acceleration, typically between 25-50 mph. Harsh or unpredictable shifts can also occur. This is the same transmission used in F-150s and has similar issues.
Common Symptoms
- Shudder during light acceleration
- Harsh shifts between gears
- Hesitation when accelerating
- Clunk when shifting at low speeds
- Transmission hunting between gears
How to Fix
Perform transmission adaptive learning reset using Ford IDS or FORSCAN. Change transmission fluid with Motorcraft Mercon ULV and add Ford friction modifier. Multiple fluid changes may be needed. In severe cases, torque converter replacement may be necessary.
Sources for this issue (2)
The 10R60 automatic transmission may exhibit harsh or delayed engagement when shifting, particularly from park to reverse when cold. Some vehicles skip gears during deceleration around 28 mph causing lurching.
Common Symptoms
- Harsh engagement from park to reverse (especially when cold)
- Delayed shift response
- Lurching or clunking during gear changes
- Transmission skipping gears during deceleration
How to Fix
Ask a Ford dealer to apply the transmission software update in TSB 23-2352 for harsh or delayed shifting, and to inspect the transmission fluid level and condition. Also have the dealer check your VIN for the open park pawl recall, which covers vehicles built from 11/14/22 to 01/12/23.
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 (1)
The Freestar inherited many of the Windstar transmission problems. The torque converter develops shudder during light acceleration, and on 2004-2005 vans the torque converter pump shaft splines can wear and fail without warning, causing a sudden loss of drive (recall 12V-006 / Ford 11S25).
Common Symptoms
- Shuddering at 40-60 mph
- Harsh shifts
- Slipping
- Transmission warning light
- Sudden loss of drive while the engine keeps running
How to Fix
On 2004-2005 vans, check the VIN for open recall 12V-006 (Ford 11S25); under it, dealers replace the torque converter free of charge. Outside the recall, have the transmission diagnosed for converter or internal failure and repair or replace as needed.
Sources for this issue (3)
P0742 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 P0742 mean on a Ford?
P0742 stands for "Torque Converter Clutch Circuit Stuck On." P0742 means the torque converter clutch (TCC) circuit is stuck on, meaning the lockup clutch that mechanically links the engine to the transmission stays engaged when it should release. The computer commands the clutch on and off, and when it detects the converter clutch remaining applied, it sets this code. The classic symptom is the engine stalling when coming to a stop, similar to driving a manual without pushing the clutch in, along with possible harsh shifts or poor fuel economy. It points to a hydraulic or solenoid problem inside the transmission rather than the engine. On Ford it is documented across 5 models: F-150, Mustang, Ranger, Bronco, Freestar.
What are the most common causes of P0742?
The most common causes of P0742 are: Stuck or failed torque converter clutch solenoid, Stuck valve in the valve body (TCC apply valve), Contaminated or degraded transmission fluid, Internal transmission hydraulic leak holding the clutch on, Wiring or connector fault to the TCC solenoid, Faulty torque converter, Dirty or clogged transmission filter. The specific cause varies by vehicle.
How much does it cost to fix P0742 on a Ford?
Published repair estimates on Ford range from $200 to $7,000 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.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.