The contact owns a 2014 Ford Expedition. The contact stated while driving 65 MPH, the transmission downshifted to first gear unexpectedly, causing the rear tires to lock-up. The vehicle drove off the road into a ditch. The check engine warning light was illuminated. The contact had not sustained any injury and was able to drive to the nearby residence. The contact is an independent mechanic. The contact scanned the vehicle and retrieved DTC code: P1500, indicating a rear output speed sensor failure. The contact determined that the TCM needed to be replaced. The contact purchased the TCM from the dealer and replaced the TCM. The vehicle was repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 150,000.

- Lebanon, IN, USA

The contact owns a 2014 Ford Expedition. The contact stated while driving 60 MPH, the vehicle unintendedly downshifted. The contact turned on the hazard lights and shifted into neutral(N) and coasted to the side of the roadway. The contact restarted the vehicle however, the vehicle failed to exceed 20 MPH. The failure was self-corrected but returned intermittently. The check engine warning light illuminated, and the failure became more persistent. The contact stated that while idling, the transmission was downshifting. The vehicle was taken to a certified mechanic who diagnosed the vehicle and determined that the TCM and engine had failed. The mechanic had stated the TCM needed to be flushed, and the computer system needed reprogramming. The vehicle was in the process to be repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA Hotline. The approximate failure mileage was 149,000.

- Stewartsville, NJ, USA