A833 Vibration Issue

If you're running a scattershield or any bellhousing really, you need to be check to be certain the rear transmission mounting face is parallel with the flywheel/crank flange. The back mounting surface of the block may not be perfectly square either. I have to run two .020 shims and two .010 shims to get mine parallel.

I also have to run the offset dowels to get it lined up with the crank shaft centerline, and they were not off by just a little. The quality control at Lakewood leaves a lot to be desired.

There are two steps to this process and the first is often forgotten or simply not done. It does affect shift quality and associated part life.