Not sure how to explain it, when I am going between 45-65 in overdrive, when i let off the gas I get a loud thump from the rear end. Only between those speeds and only with overdrive on. It almost feels like the *** end of the truck is hopping. 2005 F150 supercrew with 3.73 gears, Detroit TrueTrac LS. 105,000 miles.
HELP!!