I got a 2006 Ford F350 with 115200 KM's. i took it to the dealership last week because the check engine light came on. come to find out the Injector Drive Module died. when it was there i told them that the tranny is slipping bad. when i picked it up, they told me that "we can not find anything wrong with the tranny." So here is the proof that something is wrong with it!
trans stuck in higher gear, then slams back into 1st:
YouTube - Stuck In 4th or 5th Gear
YouTube - f350 trans stuck in higher gear
trans slipping badly:
YouTube - Hard Shifting
YouTube - f350 trans slipping