[DieselSJ]

Angles...

With u-joints, you want the angle at the trans and the angle at the pinion to match. So if your driveshaft has a 5 degree down at the trans end, you want a 5 degree up at the pinion end. Basically you want the output shaft of the trans and the pinion shaft to be parallel with each other. Also true for side-to-side where you want the angles to match between the trans and the pinion. If you really want to get technical, you actually can run the pinion 2-3 degrees down from where you want it to compensate for torque while you are moving.

With a CV, you want the pinion to point directly at the tailshaft of the trans. There should be 0 degree difference between the pinion angle and the driveshaft angle.