2015 FORD F-150 Complaints

1. System Failed: Power Train (Transmission). Component Failed: The 6R80 6-speed automatic transmission, specifically the internal lead frame and the direct drum. Inspection: No, the failed unit was replaced on December 19, 2025, but itemized diagnostic reports and repair invoices from both a Ford dealer and an independent shop are available for inspection. 2. The vehicle experienced sudden, unexpected downshifting and a temporary loss of power while in motion. These incidents occurred frequently and randomly, particularly while accelerating or traversing inclines, creating "unsafe driving scenarios" where the vehicle could have been rear-ended or lost traction due to abrupt gear changes. Furthermore, the vehicle eventually entered "limp mode," where it would "buck" during shifts and fail to accelerate under load, leaving the driver vulnerable in traffic. 3. Yes, by both. Independent Center: Super Tech Automotive confirmed on December 11, 2025, that the transmission line pressure dropped from 158 psi to 20 psi under load, causing the vehicle to go into "limp mode". Dealer: South West Ford Service Department verified the concerns on December 16, 2025, documenting a "torque converter shudder" and "direct drum failure" with "excessive metal debris in fluid". 4. Yes. The vehicle was inspected by a manufacturer-authorized dealer, South West Ford Service Department, on December 16, 2025 (Service Advisor Ryan Forbis; Transmission Specialist 'Dietrich'). 5. Yes. Symptoms: The symptoms first appeared in August 2025 as a "sudden, temporary loss of power or unexpected down-shifting". Warning Lamps: Initially, no warning lights or error codes were produced, which prevented early detection during multiple diagnostic attempts. Later Symptoms: On December 11, 2025, the SES (Service Engine Soon) Light finally appeared when the truck entered "limp mode". Prior to the total failure, the transmission also exhibited "harsh/jerky downshifts" and would "hang up in gear".

Truck began reviving at high idle after throwing a check engine light, then wrench light as I was driving. I was able to safely get off the road. Shut it down wouldn't restart. I let it sit for 4 hrs, it started then I began driving again as there was no indication of an issue before. At 50mph it happened again. Truck began reviving at recline, check engine and wrench light. Shut it down again, and this process of restarting again hours later as nothing was wrong is still going on, 3 yrs of it. Check engine codes that do come up when it begins again all point to speed sensor and leadframe. Someone said check cam sensors but have no check engine on them at all, only leadframe issues that abruptly occur out the blue. When it happens I can driving at any speed and first thing that happens is the throttle revs to redline and Truck begins shifting abnormal, check engine, wrench, shutdown(thankfully), then hours again now indication of an issue! When i get the truck shut off and off the road, which i had it towed 7 times, show p705,706,707 codes all pertaining to leadframe. Please for the sake ny family and many others recall the 2015-2017 F150s for this $2000 electrical sensor replacement that is putting lives in jeopardy.

The contact owns a 2015 Ford F-150. The contact stated that while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The powertrain symbol was displayed, with a message to check the Owner’s Manual. In addition, the contact stated that the failure had occurred while driving from a stoplight. The transmission remained in third gear. The vehicle was turned off, and the powertrain was reset. The failure was a persistent failure. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was made aware of the failure but provided no assistance. The failure mileage was approximately 109,320.

The transmission range sensor has failed on my F150. This made my truck go into limp mode and unable to start. The Ford dealership replaced the lead frame and TRS as it was burnt out. The new TRS then began to automatically downshift while I was driving on the highway. It went from 6 gear to 4th back to 6th and then briefly to 1st making my truck lose power before going back to 6th gear while I was driving at 70 mph. There were no warning lights, a service light had come on just before the incident. The safety issue is a sharp and sudden downshift while driving at high speeds this can cause severe accidents. I understand that the Transmission Range Sensor for my Ford F-150 is under investigation by the NHSTA and in the engineering analysis stage before a recalled is determined. The dealership is looking at the problem as I’ve already spent over $2100 fixing it.

2015 Ford F150 with 6R80 transmission. No warning lights, transmission down shited from 6th gear @55mph to 1st gear followed by complete transmission failure and loss of power. This took place on I26 in South Carolina near Spartanburg. Was then towed to a transmission repair shop in Greenville SC where the transmission had to be rebuilt (6 month lead time for new replacement from Ford). Invoice attached. Additional visits were required due to control module causing irregular shifting after repair. Please contact Advanced Transmission (contact info listed on invoice) for additional details.

When driving the truck, the RPMs will randomly jump up and down without accelerating or shifting gears. At times it will also randomly shift when it doesn't need to shift. It downshifts more than it upshifts. This happens at a steady cruise down a highway and sometimes it is like it takes a minute or two to figure out which gear it actually needs to be in. It seems like the transmission may not be communicating well or something. I am worried that I will pull away from a red light one day and it will decide it doesn't want to shift at all and end up in what could be a terrible intersection situation.

Hard clunk from first to second shift. The wrench light comes on, telling you to check the manual. Vehicle stays in 3rd gear. Will not shift into 6th gear. Will not downshift into 2nd or 1st gear. stays in 3rd gear at a dead stop. The problem was independently reproduced.

Experiencing sudden hard shifting with the 6r80 transmission. Have had wheels lock up once. Issues with the lead frame as well

I was driving down the high way going about 40 to 50 mph and it suddenly shifted down into 1st gear making my tires lock up and then the engine light came on with the out put speed sensor code

Was driving at 50mph on hiway, all the sudden truck has loss of power and engine shut off, coasted down to stop, put truck in par, stared the car and drove another 5 miles and same thing happened again. No warning lite, no error messages was present when shut off happened nor during OBS scan at later time was. When second shut off happened there was a shift down happened. Not sure if the transmission speed sensor has something to do with engine shut off.