Determining Driveline Angles

[ScotI]

I readily admit, my past projects have been drop & go w/o verifying the driveline angles. They were all mainly 1:1 final drive ratios so vibration wasn't an issue. I never had any issues to be honest & I've lowered almost every vehicle I've owned (GM trucks, ElCamino's, Malibus, Camaros, & 1 x-DPS Mustang). This time I'm trying to improve. I'm finishing up on a 'fresh' chassis for a 1964 pick-up/shop truck. I'm running a 700r4 w/factory style truck arms (2-link + Panhard bar) & understand the driveline angles become that much more critical for vibration free operation. So, I've been digging for info on driveline set-ups. What's correct, what's possible, 1pc, 2pc w/carrier, single u-joint, dbl CV joint, etc, etc.....

From what I understand, the angles @ each end of a 1pc d.shaft set-up should equal each other. I understand this as 3.0° @ the trans suggests I need 3.0° @ the rear end. Anyone want to confirm/correct this?

My reading also suggests these amounts/degrees @ each end of the shaft are to help cancel out the ocillation that occurs as the joint spins (speeding up & slowing down the shaft as it turns). By keeping the amounts similar, they help cancel each other out. Zero is not good either as the needle bearings won't lubricate/wear properly.... minimal (1-2°) difference is desired. Again, anyone that knows this stuff want to confirm/correct this?
If these statements are correct, it shouldn't matter whether the pinion is up or down, as long as the degree amount is similar.... Right??

Hoping this is correct, I played around w/the heights on my chassis until I could yield similar numbers (@ ride height). My starting point was: 4.8° @ the trans output shaft; 2.2° @ the drive shaft (climbing from the trans to the pinion; 2.0° @ the pinion). By slightly raising the trans tailshaft, I was able to achieve 4.2° @ the trans output shaft. I don't have room to raise it any higher for a lower degree.

I then swapped in some 2.5° shims & the new numbers were 4.2° @ the trans output, 1.6° @ driveshaft (again, uphill), & 4.5° down @ the pinion. The 4.5° @ the pinion is on the edge of acceptability from what I've read for a 'street vehicle'; the downside being increased wear on the u-joints. The plus side seems to be as the torque is transferred to the housing, I should remain within my 2° window. Is this correct?

If so, this is something I can live with. This also reduces the amount the truck arm drive shaft hoop must be raised by .500".

Allright experts..... chime in .