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Probably a Stupid Pinion Question

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Old Aug 24, 2007 | 09:06 AM
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Johnny5's Avatar
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Default Probably a Stupid Pinion Question

So I've searched and dug around and probably have confused myself more on whether or not my setup is correct.

I put the angle finder on the DS and it measured -3.5 degrees down towards the rear

I put the angle finder on the spohn torque arm plate and it measured -2.0 to -2.5 degrees pointing down.

So I'm not sure if it is DS-angle - Rear Pinion angle or vice versa.

Is it -3.5 - -2.5 to get me a -1.0 pinion angle or did I screw that up?
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Old Aug 24, 2007 | 09:30 AM
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http://www.rosslertrans.com/Pinion%20Angle.htm

Nothing to do with driveshaft angles. Rossler gives the best pictorial explanation above.
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Old Aug 24, 2007 | 10:09 AM
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So the simplistic explanation is just:

1. Put angle finder on transmission seal and note the angle.

2. Put angle finder on the Yoke (rotated in the vertical position) and note that angle.

3. Ultimate goal is to have the two angles cancel each other out upon hard acceleration.

4. Depending on your setup you would need to compensate for the fact the drivetrain will want to rotate in an upwards motion (towards the floor pan) and back it off some based upon the amount of "give" in your suspension. (rubber mounts give more than rod end, 4 Link vs. Torque Arm, etc.)

5. Most people say to set this to around -2 which would assume that your tranny angle is either parallel (0 angle) or maybe slightly positive like a +1 degree angle.


I think that makes more sense to me know that I looked at it.
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Old Aug 24, 2007 | 12:02 PM
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Originally Posted by Johnny5
I think that makes more sense to me know that I looked at it.
I can agree that it does. I have always had issues trying to set PA. With that explanation on the website, it now is brainless.

I set my angles to equal but opposite when I built my T56 crossmember and then set PA when all done...very very happy with the results!
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