2018 Ford Mustang: stuck in gear or won't shift

Filed Aug 4, 2026 · Transmission · IL

Was driving my vehicle roughly 10-15mph after a stop, noticed vehicle wasn’t shifting into the gears properly as it was only in 2nd gear and the RPMs kept climbing, when it finally shifted into 3rd gear my transmission proceeded to lockup cause my rear tires to skid and stop in the middle of traffic and in the middle of an intersection disrupting the flow of traffic. Vehicle displayed a wrench light on the dash saying “see manual” as related to a Powertrain issue. Vehicle is in limp mode and barely drives, any shifting after 1st gear will cause the vehicle to lockup and lose all power for several seconds. ONLY HAS 28,330 MILES, DID NOT REACH THE FIRST SERVICE INTERVAL FOR MAINTENANCE ON THE TRANSMISSION.

Filed Jul 23, 2026 · Transmission · TX

My 2018 Ford Mustang EcoBoost with the 10R80 automatic transmission began experiencing hesitation, delayed engagement, and harsh jerking during low-speed acceleration (15-20 mph), especially when cold. Engine RPM would increase, but the vehicle would hesitate before engaging. The condition worsened over time and eventually the vehicle entered limp mode, causing a significant loss of power and illuminating a wrench warning light. An authorized Ford dealership diagnosed DTC P07F6 (Gear 9 Incorrect Ratio). The dealer verified fluid level, updated the PCM, and performed adaptive relearn procedures, but the problem remained. The transmission fluid was found to be dark with a burnt odor, and the dealer diagnosed an internal transmission failure requiring complete transmission replacement at an estimated cost of $9,250. This created a safety concern because the vehicle did not consistently accelerate as expected when entering traffic, crossing intersections, or merging onto roadways. Delayed engagement and loss of power reduced the ability to accelerate when needed. The vehicle has approximately 82,256 miles and has been maintained according to Ford's recommended service schedule. I am also aware of numerous publicly documented owner reports, technical discussions, and litigation involving the Ford 10R80 transmission used in vehicles from this generation. One of the commonly discussed concerns involves the CDF drum design in earlier 10R80 transmissions. My understanding is that Ford later revised the CDF drum design in subsequent production; however, when I contacted Ford regarding this transmission failure and requested assistance with repair const, they advised that my vehicle was not covered by any recall, customer satisfaction program, or warranty extension related to this issue. I am submitting this report so that my experience can be considered together with other reports to determine whether a broader safety-related defect exists.

Filed May 20, 2023 · Transmission · MI

2018 Ford Mustang with 10R80 10 speed transmission. Bronco like action when slowing almost whiplash like , stalls when stopping sometime, very hard shift jerking, hard downshifting when slowing, clunking into reverse, loss of power suddenly on the FREEWAY!!!!!!!!!, very hot transmission temperatures (230+), limp mode, Very unsafe if in any FORD or other vehicles have the 10R80. Immediate recall is needed, immediate acknowledgement by FORD MOTOR COMPANY is needed here so all the multiple lawsuits can stop and safety can / should be the top priority here. SAFETY 1ST.

Filed Jan 22, 2020 · Acceleration, Engine · 27,000 miles · AL

At acceleration the car won't shift when needed then it'll automatically down shift and stop accelerating. The RPM gage needle bounces up & down with & with acceleration imaged speed still decreases then something catches and it'll start accelerating & RPM going to high then starts all over before finally working right.

Filed Nov 26, 2019 · Transmission · 3,000 miles · IL · crash

The transmission gets stuck in gear when you accelerate hard, you can't take the car out of gear and the clutch does not work. The engine continually revs/speeds up when no one is touching the accelerator. This is very dangerous and needs to be addressed right away. This was driving in sport mode, this has no happened in normal mode.

Filed Mar 10, 2019 · Transmission · 400 miles · OK

When getting up to speed on an on ramp or passing on a two la e road, when shifting into third gear, the transmission will not go into gear. I've had this happen twice, once my daughter was with me on a two lane road, going from second to third while passing, the car will not allow it. People have noted this many places while running out second gear and shifting into third in multi situations. This is a hazard and it is known due to the shifter not being direct and using a remote linkage. An aftermarket bracket and shifter will fix this issue, however this vehicle should operate safely without purchasing aftermarket equipment. Simple look up missed shifts with mt-82 mustang transmission. You will see many with the same issue and aftermarket parts to fix this safety hazard.