What is everyone running their pinion angle at? Street / track duty. I'm pretty certain on how to find it with a 2 piece shaft. But correct me if I'm wrong, both shafts are supposed to be opposing angles ie +2, -2, and tail of Trans is supposed to be opposing of rear axle ie +3,-3. If both angles are negative then you subtract the lesser from the greater -6 and -3 = -3? And if you have a negative and a positive you add them -6+ +3 =-3? So if I had a desired pinion angle of -4, I would want something like -4,-8 or 0,-4? Does this sound right?

 

bump** anyone??

 

I just always go off rearend. shoot for -3*. Driveshaft does matter some but not as much as rearend.

 

Here's a post that is my reply to another similar question. Open the manual (link in the post) from spicer it explains how to setup 2 piece driveshafts

https://www.performancetrucks.net/fo...9/#post5257206

Edit: Figure 8 and 9 on page 13 and 14 is what you should follow. 1 to 1.5 degrees from trans to front shaft, pinion parallel to front shaft and no more than the max recommended angle for your u joints between front/rear shaft and between rear shaft/pinion.