2012 Ford F-250 transmission problems

Filed Jul 23, 2025 · Electrical, Engine · IA

I just had to replace the ECM because it fired. after replacing that it still won't start. I've talked to multiple people who have had the same problem.

Filed Jul 7, 2025 · Engine, Transmission · 27,500 miles · NJ

The contact owns a 2012 Ford F-250. The contact stated that the vehicle was previously taken to an unknown dealer, where it was diagnosed with engine seizure due to coolant intrusion in the engine. The contact stated that while the dealer was in the process of replacing the engine, the dealer informed the contact that the transmission also needed to be replaced. The dealer replaced the engine and the transmission. The contact stated that while driving at various speeds, the vehicle was bucking and jerking. The gear shift indicator light displayed that the transmission was slipping from drive(D) to neutral(N) and reverse(R). The vehicle was taken to an independent mechanic, where it was diagnosed that the transmission needed to be replaced; however, the part was on back order. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 27,500.

Filed Mar 20, 2023 · Fuel system, Transmission · 160,100 miles · WA

The contact owns a 2012 Ford F-250. The contact stated that while driving at various speeds over 50 MPH, the vehicle shifted into LIMP Mode. No warning lights were illuminated. The vehicle was taken to a local dealer, where the failures could not be duplicated. The vehicle was not repaired. The contact stated that the failure persisted and that the transmission was slipping while shifting. The contact also stated that prior to entering the vehicle, he noticed a fluid leak underneath. The vehicle was taken back to the dealer, where unknown transmission repairs were completed; however, the failure recurred. The vehicle was then taken to an independent mechanic, where the fuel pressure regulator and heater malfunction failure codes were retrieved, and it was diagnosed that the Diesel Exhaust Fluid (DEF) tank needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 160,100.

Filed Aug 24, 2022 · Suspension, Transmission · 136,700 miles · MS

The contact owns a 2012 Ford F-250. The contact stated that while driving at various speeds, the vehicle would shake abnormally without warning. Upon investigation, the contact linked the failure to the death wobble. The contact also stated that the EGR cooler was defective, causing the vehicle to downshift while driving at various speeds. The contact had the EGR cooler repaired by the dealer. The vehicle was not repaired for the death wobble. The manufacturer was not notified of the failure. The approximate failure mileage was 136,700.

Filed Aug 6, 2022 · Engine, Transmission · WV

Very intermittently, when I brake this vehicle to bring it to a stop, the engine will start to rev uncontrollably. I have to practically "stand" on the brake to keep it from charging forward. I have to turn off the truck to stop this high speed revving. After this happened 3 times in 2 months we took it to the dealer to check. There was nothing on the floor that could cause the gas pedal to accelerate. The dealer in Kingwood, WV could not duplicate, and found nothing wrong when inspected. We only use the truck once or twice a month so it is a low use vehicle. For this reason the problem does not occur frequently enough to replicate "on demand". While there was not a crash, it almost revved through an intersection and almost ran into another vehicle. Fortunately I was able to throw it into park (Not Good for the vehicle) and then turn it off.

Filed Feb 5, 2021 · Engine, Transmission · 174,000 miles · WY

The 6.2 engine has broken valve springs 3 times now. First two times was able to just replace the broken valve spring. The 3rd time it broke a valve spring it dropped the valve in the motor and put hole right through the block and seized the motor almost causing me to wreck

Filed Feb 16, 2020 · Transmission · 142,000 miles · VA

Driving down interstate 85 at 65mph passing a vehicle and all the sudden truck starts to violently shake, making it nearly impossible to control until we got below 30 MPH. Felt as if tires were going to fall off or we were going to loose control.

Filed Feb 15, 2019 · Transmission · 90,000 miles · CA

Shifts to while driving

Filed Jul 16, 2017 · Transmission · 45,000 miles · AR

Egt sensors failing and leaving me on the side of the road

Filed Jun 4, 2017 · Transmission · 134,000 miles · TX

Egt sensor fault resulted in a "stop safely now" alert, shutdown of power while approaching the neches river bridge in beaumont, tx, a bridge on a 3-lane interstate (I-10). Engine subsequently shutdown while in heavy afternoon work traffic causing high potential for a major accident. Traffic behind and next to me swerved and braked on the 75 MPH interstate while the truck lost power as it just made the crest. Vehicle was towed. Egt was replaced. Bank 1, sensor 4. Second such failure. First was in august, 2015. Replaced with ac3z-5j213-b in aug, 2015 (the current failed egt). This time replace with ac3z-5j213-c, see photo for differences in sensor design. I have read rq 14-005, vehicle commanded engine shutdown, and cannot believe this topic was revisited with no action resulting to require the 15v‑175 remedy reprogramming for non-emergency vehicles. I ask the the federal safety agency revisit this topic to consider allowing owners to have the same PCM change to stop a single egt sensor fault to result in an immediate loss of vehicle power and causing high potential for injury to the public. As a mechanical engineer in the petrochemical industry, and having participated in many hazards analyses over 20 years, I struggle to see that the consequence of continued use with a bad sensor for a longer period, but at some reduced power, could ever be greater the chaos, confusion, and high injury potential from prompt removal of 70% vehicle power from the driver in 45 seconds. Towing a 5th wheel trailer and experiencing the "stop safely now" power cutout is a recipe for disaster. Thank you for your consideration, and I hope to hear of the reopening of investigation on this topic and allowance to reprogram the PCM.