One problem related to transmission failure has been reported for the 2003 Ford F-150. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Ford F-150 based on all problems reported for the 2003 F-150.
Transmission line cracked on my 2003 Ford 150 super crew. Trasmisssion began to shift erratically leading to total transmission failure at around 36,000 miles.