View Full Version : IRS Pinion Angle

03-18-2005, 07:11 PM
Hey guys, I've searched pinion angle on most of the popular formus but haven't found much specific to 03/04 IRS'. I've heard that 2-3 degrees is acceptable if you have urethane bushings (which i do) but is that up or down? i noticed the pumpkin has a bit of an upward tilt to it so i hope it doesn't have to go down the other direction. i know once i get the pumpkin set i should be able to match that angle with the tailshaft of the trans and most all vibrations should go away. i just need a good starting point...anyone know? i appreciate all the help.

03-19-2005, 05:24 PM

This is a good starting point to read if you haven't already. I've heard of some people placing two washers on top of the Urethane bushing to bring in down, which will help reduce the vibrations and theoretically reduce wheel hop?

Good luck!