[Ironangel]

Originally Posted by mongocanfly

If your truck is lowered the trans yoke could possibly be lower than the differential yoke...but the theory is the same..set your pinion angle pointing 3deg up...set your engine/trans angle 3deg down
You want the imaginary centerline of the diff and the engine to be parallel to each other...
Doesn't matter which is on top
And 3deg is just a number to go by...it could be 4 or 5 or even 2 deg....but both need the same angle ...just the diff up and engine down...
What you dont want is the trans yoke pointing straight at the diff yoke....the angle is needed to make the needles in the u-joints rotate

Greg, 3 degrees is a u-joint limit angle. Unless he's using extreme angle u-joints which he is not then 3 degrees is a limit number allowing movement in a + and - for suspension stroke. The OP needs to get his cross member in and bring that tail shaft up to level out the motor and trans. He needs to measure the angles off the yokes and match those angles within 3 degrees. Judging from the pic the pinion is up and the tail shaft is down which is ok as long as neither angle exceeds 3 degrees. Need to know exactly what that pinion angle is so he can set angle on the tail shaft with shims on the cross member. 3 degrees up on the pinion would be ok if he holds 3 degrees down on the tail shaft. Since he's running on stock suspension heights and stock motor mounts, he should be golden as long as the rear axle and suspension hasn't been changed. That said, his pic appears to show that pinion in an up or positive angle? Like you I was wondering if the truck has been lowered or was once a two piece drive shaft truck at one time?