Pinion angle

race car, or street car?



street car is ok to have 1-2 degrees down, but make sure that both ujoints have a couple of degrees on them(not strait), or they will not lubricate properly
 
My understanding of pinion angle is the it should be the opposite of the transmission angle. The line continuing from each should be parallel. So if the trans is +2 degrees, the rear should be -2 degrees if the installed height in the vehicle of both parts are the same.

The question is what is the maximum angle I can point the pinion downward?
 
fakessturbo said:
My understanding of pinion angle is the it should be the opposite of the transmission angle. The line continuing from each should be parallel. So if the trans is +2 degrees, the rear should be -2 degrees if the installed height in the vehicle of both parts are the same.

The question is what is the maximum angle I can point the pinion downward?
Click to expand...

no real max, if the lines are parallel

and it won't hurt if the pinion is down slightly more, as it will rotate up a little under power


but IIRC, you don't want more then ~10 degrees in the joints, as you still need extra for axle movement
 
Thank you gentlemen.

I cut the control arm mounts off today and I am fabing new ones, shooting for 2 degrees down on pinion, shimming the trans +1 degree. It also makes the carb more level.
 
fakessturbo said:
My understanding of pinion angle is the it should be the opposite of the transmission angle. The line continuing from each should be parallel. So if the trans is +2 degrees, the rear should be -2 degrees if the installed height in the vehicle of both parts are the same.

The question is what is the maximum angle I can point the pinion downward?
Click to expand...


that is correct.....5% max....less the better


thats 2.5+2.5
 
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