Is my pinion angle correct?

[standup303]

Not going to lie, I get a bit confused on pinion angles. My transmission output is at 1.8 degrees and rear yoke is at 2.0 degrees. Meaning pinion angle is .2 degrees up. Pics are attached.

From what I read pinion angle is supposed to be 2 degrees(pointing down 2 degrees relative to the engine) for a stock vehicle?

Then I also ready 5-7 degrees down relative to the transmission output is ideal from Mopar?

Bottom of my balancer is at 1.9 as well but was reading it should be between 5-7?

Just confused on specs at this point.

This is a 69 Dart 8 3/4 with a 440 and Schumacher mounts. 100% street car may see the strip once per year.

 

[crackedback]

5-7 down for street driving is going to be hard on the u joints.

Most street set ups, 3* down, 4* max. In your case you want the pinion rolled down to a -1 setting. 3* down from where it is now.

JMO

 

[Demonx2]

If you assume the rear yoke rises 2* on acceleration, then your "pinion angle" is really 0.2 +2=2.2". This is above the recommended 1.5* to 2*. In your case, I would simply add 2* pinion shims to it to nose the rear yoke (pinion gear) down by 2* making it right at 0*. Then on acceleration, you would be at a "pinion angle" of 0.2*, which is almost perfect.

I put "pinion angle" in quotes as it's really a misnomer. What we call "pinion angle" is really the difference between the angle of the trans tailshaft and the actual pinion gear axis angle in the rear-end.

I just went through this exercise on the avatar hence my input. It all depends on what you believe is the proper value for spring wrap-up on acceleration. If you belive it's more than 2*, then use a larger pinion shim accordingly.