olskoolpup
+1y
Andy (periportfd) has helped me alot with pinion angle stuff.
for instance, if the rear of your tranny is pointing down 2 deg, then youll want the front of the rear end pointing up 2 deg. this will allow the bearings in the ujoint to lubricate properly, and not bind.
if your angles are off a little, it may just shorten the life of your ujoints a little bit, barring they are binding. if they bind or if the drive shaft is in a straight line with the front of the rear end, the bearings will not rotate inside of the ujoint and fail rather prematurely.
suspension geometry is pretty important, but easily learned.