Hi...I have a '90 HZJ77....I recently replaced the front right side shim/wedge that sits between the leaf springs and the axle(held in place by 2 u-bolts), the old one disappeared.....is this a caster shim?? Not having the old shim we sized the new one by eye based on the left side at 4 degrees(they look even). Truck now pulls right when the wheel is not attended to. I've had an alignment assessment and the left side caster is +3.1deg....the right side with the new shim is +1.6deg(all other measurments, toe and camber are good). I'm i wrong in assuming that the new right side shim I installed is too small a degree which is causing the pull to the right?? Would a larger degree shim correct this or am I way off?? Any opinions or help appreciated!