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There is way to much information on pinion angle out there, that I am confused. I bought an angle finder and took measurements. The confusion comes in when doing the math. If the pinion is facing down does that angle get a + or a -? So I drew a picture. Could someone please dumb down the whole pinion angle equation? Thanks




I'll try. In your drawing you are 6.5* nose down from parallel.

The easiest thing to do from your drawing is to rotate the tranny angle up to 0 to parallel from your 2* down. For explanation sake.

Its now easy to see that your pinion angle is now 4.5 nose down from parallel.

But your tranny angle is down 2* down, so being down 2* your pinion angle is 6.5* down. At 0 it would be 4.5* down. If the tranny was 2* up you would have a 2.5* down pinion angle.

Your driveshaft angle only comes into play if its to extreme, meaning if the axel is Much lower then the tranny centerline.

Correct pinion angle is so the U-Joints work together well both under power and on decell.

I am sure, this is still not clear to many, it never is.