I'm hearing a strange "Thunk!" from the rear of the truck when I come to a stop then accelerate forward again. My Toyota used to do this when it wanted new u-joints but I just checked them and they are in execellent condition.
Any ideas what the sound might be?
(And NO I don't have anything loose rolling around in the rear of the truck!)
Good idea from ARD. I have a question though, how did you check your u-joints? External visual or did you take them apart and look at the bearings? It sounds like u-joints to me, but it could be the brakes - if its not either of those, well... you have some more expensive rear end problems.
When I apply the brakes firmly and come to a stop the rear of the Blazer "Sticks" up about an inch maybe two. When I let off the brakes to accelerate away from the stop it sort of "Falls" back down and THAT is when the THUNK sound happens.
Welcome to the GM Thump. Didn't tell us what you had but my guess is a 80's with a 208. THEY ALL DO IT. The drive line gets wound up as you stop and when you release the brakes it thumps the splines in the slip yoke. GM has some funky Blue grease that cures it for about a week.