Grand Cherokee Shake Shack - Vibration
We just overhauled the viscous coupling in our 94 GCL with mixed results. After noticing that one of the tires that NTB installed was a different rating (but right size) and had worn faster than the others, it became obvious why the 4 wheel drive system was starting to fail. So we put in new front drive axles and had the transfer case rebuilt.
Here's the issue: At 50 MPH and above, the whole truck vibrates like crazy. We thought replacing the VC in the transfer case would solve the original issue of bucking and jumping and also the vibration problem. It didn't solve the virbration problem and its been getting notacably worse.
NTB replaced the front tires, rebalanced all 4 and did the alignment. So that rules out the vibration being a tire issue. The virbration is most noticable under accelleration so we're pretty sure its drive train related.
Anyone been down this road before??