Join Date: Jan 2007
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Yeah, thats not nearly enough shim in the carrier bearing. That kit appears to be meant to run with the factory block in for a raked stance (like it is now), or without the factory block for a lower rearend look.
The way you have it now, you need about 1.5" of shim, rather than your 1/2".
Axle wrap is the natural motion of the pinion teeth trying to climb the ring gear, so when you takeoff in drive, the pinion turns upwards and can in some extreme cases cause bind. The more block you have, the more leverage around the springs you have; it makes it very easy to bend the springs up in an "s" shape. The is the cause for whee hop as well.
I dont think your main problem is axle wrap though due to the add a leaf, they tend to stiffen up the pack to prevent the "s" bending decently well; i think the pinion is actually seeing too much of the opposite angle, therefore its noticeable when you let off the gas. The takeoff vibes generally indicate wrap, but i would fix the driveline angles and then get to work on the axle wrap....traction bars wont fix squat if the angles are bad to begin with.