Hello, My name is paul and i currently own a ford F150 2006 model and I have always been impressed with fords, but just yesterday i was backing up out of my drive and it just stopped and made a grinding sound as if i hit something i got out and there was nothing there it happened a few times, i let the truck rev down before i backed it up and it happened. I do not know anything about cars and was wondering if you knew

 

Eww, that doesn't sound good. Rear diff or tranny maybe.

 

Honosty it scared me, reliable product but god expensive tires lol, With out taking it to the shop is there any way i can be sure of what it is?