Having problems with my ford f-150 xlt 2007 the rear end differential is trying to lock up and making a high pitch sound. can you help me ?
It sounds like a problem with the slip clutch packs. The brakes could also be faulty or the level of oil low. You need to have your Ford checked by a Ford dealer or a mechanic so that he can identify the problem and fix it.
Make sure ur rear disc brakes aren't trying to stay locked before going into the rearend.