NHTSA Complaint #11719640 — 2015 FORD F-150

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".