I was wondering if anyone had any ideas as to what could be going on, perhaps the driveline needs new joints and balanced. But I shimmed it correctly and the vibs are coming from my seat not my steering wheels so I know its not death wobble or anything with the steering.

I have a 5.5 RE Short arm kit with drop brackets. 33 MT's. I had 4* shims in but had vibs so I jumped to 6 and I still have them but the angle is damn near perfect I am at 18 on the driveline and 17 on the pinion.

Just looking to see if anyone had any ideas before calling Tom Woods for a driveline.

 

Do you have an SYE?

 

Yes, I have a SYE with front shaft in the rear.

 

If your feeling it in the seat your front drive shaft probably needs u joints and balancing. Glad you have sye on the rear. You mentioned you have CAD brackets ; do you have adjustable arms? If not you probably need some to help dial in the caster / pinion angle. I would do a test: take off the front ds and see how it drives. You don't want to drive around with bad driveline vibes. Very bad for your pinion bearing and t case.

 

I do have adj. uppers. I will check the angle on the front driveline and then take it out and try it.

 

Check the torque on the she yoke. Mine tends to loosen up. Another good check is to put it up on jack stands, and carefully put in gear to see what shakes..

 

SYE not she. Stupid auto correct.