Question for Andy(periportfd)

Im having trouble getting my pinion angle right on my 86 mazda. It has a 2 piece drive shaft. The tranny is -5, the front shaft is -6, the second shaft is +3, and the pinion angle is -5. I have read every post on pinion angles, but still having problems with what to shim or change. I have it sat at ride height(3 inches from the ground to the frame). I would appreciate any help.

this is how mine is, and i have no vibrations (in my fullsize chevy) tranny at -2 degrees, 1st shaft at 0 (2 degree working angle at the first u joint), then the rear shaft slopes at about +7 degrees layed out, so that gives me a decent working angle at the 2nd u joint, then the rear pinion yoke is at +2 degrees, giving me a working angle of +9 degrees or less depending on ride height.

Edited: 4/3/2006 7:21:18 PM by bdroppeddak

Edited: 4/3/2006 7:19:51 PM by bdroppeddak

oh yea, thanks to andy the genius

now you may not have the floor space for this, but i stockfloored my chevy, so i had to rebuild the drivetrain tunnel through the cab anyways.

thanks cris, on my mazda the front shaft is half the size of the second, so if i change the tranny, the front shaft almost follows it.Would i need to raise or lower the carrier bushing?

you would want to raise it. make sure you dont end up with the 1st joint at 0, because the ujoints need alittle angle so they will properly lube themselves.

u said lube themselves, but yea 2 piece drive shafts are a headache startin out, but there really just as easy as a 1 piece if u just take your time and fiddle with it

yea james, if you take your time after talking to a knowledgable person about it

if ur talkin bout gump hes a tard, i just eyeballed it, and used the angle finder, works hella good.but ur info was nice

Originally posted by jsnpdy22



It has a 2 piece drive shaft. The tranny is -5, the front shaft is -6, the second shaft is +3, and the pinion angle is -5.

from what i see your 1st ujoint has a 1 degree working angle which is good, but that second ujoint is at 9 degrees which is excessive, as with the 8 degree angle on the rear end. if your ride height was higher it would straighten out that rear shaft, but a high ride height sucks.

if i raised the carrier to make the front shaft -2 it would probably make the second shaft -1. that would still make the pinion a 4 degrees, still to much?