NHTSA Complaint #11719685 — 2017 FORD F-150

While driving my 2017 Ford F-150 equipped with the 10-speed automatic transmission, the vehicle began experiencing progressive slipping and delayed shifting between multiple gears, including failure to upshift beyond higher gears during normal driving. The transmission would flare between shifts and hesitate before engaging. During one drive, the vehicle would not shift properly and displayed a wrench warning message instructing the driver to see the owner’s manual. The transmission appeared to enter a reduced performance or limp mode. The issue has worsened over time despite a recent transmission fluid service and computer relearn/flash performed by a service center at a cost of approximately $1,100. No overheating occurred, but slipping continued and spread to additional gears. Prior to purchasing the vehicle, abnormal shifting and clunking were noticed during the test drive and brought to the dealer’s attention. The behavior was described as normal operation for the 10-speed transmission. The transmission has since deteriorated into failure requiring replacement. This malfunction creates a safety risk due to unpredictable acceleration, delayed power delivery when merging or crossing traffic, and loss of normal shifting operation. Independent repair facilities have diagnosed the transmission as internally failing and recommended full replacement with estimated repair costs of approximately $8,000. Symptoms began gradually and progressed to active fault behavior with warning message activation.