[trkklr77]

if your diff cover surface is 90* vertical your castor angle will be -7* ish, means the knuckles are rotated back a little bit. what typicaly happens is that when you lift it with the springs it causes the pinion to point down and the diff cover surface is nolonger at 90* vertical. get your self some STEEL!!!! [not aluminum} angle shims in 2-4* and BOLT the to your springs between the spring and axle.