2015 FORD F-150 Complaints

Transmission downshifts on its own while driving from sixth gear to fifth and won't go back into sixth or lower than 3rd when at a complete stop.

Random, sometime months between issues, transmission and vehicle goes into limp mode. Output speed shaft sensor failure codes. This is a problem with the lead frame connector failure in the transmission (6R80 six speed). This is a common problem and should be a recall.

GOES INTO LIMP MODE. Transmission shifts hard, slips, locks up. I've been having this issue for 2 years. Transmission seems to shift twice in 3rd and 5th gears, there's a jult then goes to limp mode, no excelleration. After a minute or so, it's stuck in 3rd or 5th gear. Wrench light appears. I have been pulling over, ( when it is safe ) plugging in my scanner, then erasing codes. P0755, P0740, P0741. This has been a temporary fix. I've had the valve body replaced 3 times, with the lead frame. And recalibrate to the ECM. Still having the same issues.

While driving at night a random engine light came on as well as the wrench light came on. Truck downshift and gets stuck at 3rd gear

The contact owns a 2015 Ford F-150. The contact stated that while driving 30 MPH and attempting to activate the right turn signal, the indicator failed to operate as intended. Upon inspecting the vehicle, the contact became aware of water inside the taillight assembly. The vehicle was taken to a dealer, where it was determined that the taillight assembly needed to be replaced due to condensation. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 30,000.

While driving 75mph with cruise control set the transmission downshifted to 3rd gear. I put it in manual to shift the gear back up to 6th gear. This is the 3rd time it has happened in 6 months the first and second time was while driving in Mississippi on I-10 East and Westbound in the same trip. The last time was Sunday April 5th 2026 at approximately 1145 AM CST while traveling on I65 South in Alabama. No lights came on the dashboard when it happened.

I was driving and came to a stop at a light, let off the brake and then my truck came up with a wrench light and wouldn’t read the transmission gear, cab tool pulled these codes u0402, p0706, p0707, p1702, p1921 all pointing at towards the 6R80 transmission for this lead frame/sensor failure. It will work after the truck sits off for a little while but once you start driving for a few miles it goes back into limp mode. I’ve seen you are looking into this as a recall an would love to see others get help with this issue before it’s to late like me now unfortunately

Molded lead frame sudden downshifts to first third or fifth gear would have to pull over to the side of the road/highway and shut the truck off and restart it to get it to go away it went from happening every 50-75 miles to the point where it would happen every 1-5 miles or less when it would down shift to first gear it would lock the rear wheels and almost caused me to get in multiple accidents happened right after I bought the truck 1/27/26 all the way until 3/02/26 when I was forced to get it fixed so I could drive the truck properly

Hard Shifting, will enter limp mode in 2nd and 4th gear (usually will down shift to that gear). The check engine light will flash and I have to pull over, stop, shut off my vehicle and then restart it to resolve. I have already spent roughly $4,000 in repairs and still have continued issues. These issues started at approximately 100,000 miles, transmission was rebuilt at 110,000. The current mileage is 139,400.

Transmission will down shift randomly or not even engage when trying to accelerate. It shudders or harshly shifts.