Alright I have been battling a driveline noise on my truck since I bought it a little over 3 years ago. Complete new engine and trans, noise still there. Completely rebuilt Np208 transfer case. Noise still there. New front and rear drive shafts custom built to length...noise still there. Completely rebuilt the rear end with all new bearings, motive gears, and detroit trutrac locker, noise is still there. I get the noise at higher speeds when I am off the throttle in a cost condition but there is no noise of any kind in either accel or deccel. It must be my pinion angle? The t case has a half inch spacer between the frame and crossmember and the rear axle with 6" lift leaf springs have a 6 degree (I think)wedge/shim between the springs and axle. Anyone have any ideas?
What are others using for shims with about a 6" lift?