P0742 on Ford: How to Diagnose & Fix
Torque Converter Clutch Circuit Stuck On
8 Ford models · 8 documented issues · 2 critical · $150-$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 and fluid updates to address this.
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 and add Ford friction modifier. Adaptive learning reset via FORSCAN or dealer may help. Multiple fluid changes sometimes needed. In severe cases, torque converter replacement required under warranty extension.
Sources for this issue (1)
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)
AWD-equipped 2021-2024 Ford Bronco Sport models exhibit rear drive unit (RDU) chatter and shudder during low-speed turning maneuvers, particularly when backing up and turning sharply. The issue is caused by fluid contamination in the rear drive unit's limited-slip clutch pack. Ford issued SSM 49571 (Special Service Message) documenting the condition as "chatter/shudder during low speed turning events." Multiple TSBs have been released addressing the issue, with the prescribed fix involving draining and refilling the RDU fluid, then performing specific drive cycles with controlled turns. No formal NHTSA recall has been issued for this defect. BroncoSportForum.com has an extended thread specifically about new rear axle assembly replacements covered under this TSM.
Common Symptoms
- Grinding, chattering, or shuddering from rear of vehicle during slow-speed turns
- Noise most pronounced when backing up while turning
- Shudder felt through seat and floor during parking maneuvers
- Vibration during low-speed cornering in parking lots
- Noise may decrease after extended driving but returns
How to Fix
Ford SSM 49571 procedure: drain and refill rear drive unit (RDU) with correct specified fluid, then perform 5+ miles of stop-and-go driving with alternating left and right turns. Use Ford-specified RDU fluid only (Motorcraft SAE 80W-90 Premium Rear Axle Lubricant XY-80W90-QL or Ford Spec WSS-M2C197-A). If fluid change does not resolve, rear axle assembly replacement under warranty. Some cases require 2-3 fluid changes to fully resolve.
Sources for this issue (1)
The 10R60 10-speed automatic transmission exhibits harsh shifting, delayed gear engagement, slipping between gears, and erratic behavior. Ford identified that actuators in the transmission are sometimes too tight, causing abnormal shifts. The transmission adaptive learning can also cause issues when it incorrectly learns driving patterns.
Common Symptoms
- Harsh 1-2 and 3-4 gear shifts
- Harsh 7-6 downshift
- Delayed engagement into Reverse or Drive
- Gear slipping during acceleration
- Herky-jerky shifting during normal driving
- Gear whine from transmission
How to Fix
Transmission control module software update (TSB 21-2046). Adaptive learning reset procedure. Transmission fluid change with Mercon ULV. Valve body replacement in severe cases. Complete transmission replacement if internal damage has occurred.
Sources for this issue (1)
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
Reference TSB 23-2352 for harsh/delayed shifting software update. Check recall status for park pawl issue (build dates 11/14/22 - 01/12/23). Transmission software recalibration at dealer. Fluid level and condition inspection.
Sources for this issue (1)
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 8 models: F-150, Mustang, Ranger, Bronco Sport, Explorer, Bronco, Taurus, 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 $150 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.
Looking for P0742 on a different make?
View P0742 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.