Pinion angle

**fakessturbo** · 03-15-2008, 08:18 AM

What is the maximum downward pinion angle I can use?

**1BADAIR** · 03-15-2008, 08:34 AM

depends on suspension and use.

**fakessturbo** · 03-15-2008, 10:24 AM

1930 model A, 350/350.

The rear is coilover with hairpin control arms. Assume the trans is installed level.

**dave89iroc** · 03-15-2008, 10:43 AM

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

**Way2Slow** · 03-15-2008, 10:44 AM

Depends on transmission angle also!

**dave89iroc** · 03-15-2008, 11:27 AM

Originally Posted by Way2Slow

Depends on transmission angle also!

he said assume the trans is level

**fakessturbo** · 03-15-2008, 02:06 PM

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?

**dave89iroc** · 03-15-2008, 02:38 PM

Originally Posted by fakessturbo

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?

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