croaker

Just wondering on some rear ends they seem to be in a bind and, when you take the bushing out on the front it wants to twist up. Others don't go anywhere. Reason I'm asking the one that twists up has a vibration that comes on under load around 3 k

Alan 71

Hi c
Since the differential is bolted to the differential crossmember with 4 bolts, and the crossmember to the frame with the 2 bushings and 2 bolts at least in theory the differential shouldn't move.
Isn't the snubber/bolt there to help cushion any movement?
If the differential moves wouldn't it have to be the 4 bolts, or the 2 bolts, or both, or the snubber?
I'm thinking of car's with differentials being used with engines that originally came in them. Not big motors making big horsepower and big torque.
Regards,
Alan

croaker

I probably didn't word this right I'm good at that. If you remove the snubber bolt this one springs upward where another didn't. I'm thinking its in some kind of bind.

bazza77

whats the condition of those two big "sombrero" bushes ? (cross-member to frame )

bashcraft

The 2 bolts holding the cross member to the frame through the rubber bushings were probably tightened before the snubber was installed. Loosen those 2 bolts and break the bushings loose, then install the snubber and retighten all of them at the same time.

croaker

I have those aluminum disks up there.

croaker

From what I could tell bushings looked pretty good

bashcraft

Aluminum discs? Instead of the rubber bushings? Maybe that's the problem.

Big2Bird

Because without the snubber, the drive line angle is off. Even with aluminum reinforcements, you still need the snubber.

croaker

I didn't delete the snubber. I'm just comparing two almost same cars one has a vibration the other didn't. It's not the usual suspects. So this is first thing that sticks out.