Quote:

There is so much misinformation on driveline angles, pinion angles and trans and pinion angles compared to each other it is absolutely sickening

you are correct on wanting your pinion angle more down when sitting still, never, never run it pointed up towards the tranny



Misinformation, including the bold part of your post. The angle the pinion sit at has NO relation to the ground, it's the trans output shaft orientation that counts.

As a bastardization of the comment, if the trans was pointing 10* down, the pinion should NEVER be above level to the ground, so you could NEVER achieve a pinion angle of less than 10* down... that won't work!

Street car, I won't generally set pinion angle any more than 4* down. The OP's trans is pointing down 4*. A desired 4* down pinion angle, the pinion would be 0* or perpendicular to ground. If a 3* down angle is desired the pinion would be 1* UP.

If you get too severe an angle on the pinion, you risk overworking the u-joints. Ideally, under power, you would like the angles to cancel so pinion and output are parallel.

For the OP, mainly street driven, I'd set it at 3* down, with pinion at 1* UP, and drive the snot out of it.

When in doubt, send Dr. Diff a pm or call him.