Hi everyone,
I've been looking around for answers and haven't quite found the answer although there are some that are fairly close....
I get this very loud, deep vibration noise in the cabin when lifting off the gas at highway speed. Noise goes away as soon as I hit the gas again. This is a 1996 gmc c1500 4.3L with many many miles on it. I did check the u-joint, there is some play where the U joint hooks into the rear diff. The joint just minimally slides in those retaining brackets that you bolt up the joint using 11mm to the rear diff. I'm not sure how much play is allowed there... could that be it?
It could also be a dying rear diff (hope not). It was basically dry when I bought the truck but all noises went away completely when I added diff fluid. I can spin the shaft about 1/6th turn without any resistance though, not sure what tolerances are allowed unfortunately.
Appreciate any help, thanks in advance folks!
I've been looking around for answers and haven't quite found the answer although there are some that are fairly close....
I get this very loud, deep vibration noise in the cabin when lifting off the gas at highway speed. Noise goes away as soon as I hit the gas again. This is a 1996 gmc c1500 4.3L with many many miles on it. I did check the u-joint, there is some play where the U joint hooks into the rear diff. The joint just minimally slides in those retaining brackets that you bolt up the joint using 11mm to the rear diff. I'm not sure how much play is allowed there... could that be it?
It could also be a dying rear diff (hope not). It was basically dry when I bought the truck but all noises went away completely when I added diff fluid. I can spin the shaft about 1/6th turn without any resistance though, not sure what tolerances are allowed unfortunately.
Appreciate any help, thanks in advance folks!