Quote:
Originally Posted by gpvecchi
The total ideal difference should be less than 1 degreee, and every side should be less than 3 degree. Your diff is ok, you have to correct the transmission angle.
You have to raise the gearbox, right? You should put a shim between the transmission support and its plate.
Keep in mind that rising the gearbox will change the diff angle too.
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Agree on the less than 1 degree (opposing) differences. I’ve read that you don’t want to go any further than 5 degrees and that 3 degrees is the optimum.
Yes, ideally I would raise the transmission to be closer to the opposing +2 degrees on the diff end. The issue arises with the fact that I (and I assume anyone else with a alum 1-piece driveshaft) do not have the clearance on the trans side to shim the trans to raise it and get it to -2/-3 degrees, as the driveshaft is almost coming in contact with the rear shifter mount bushing.
As a shear test to see if bringing the two inline will indeed fix the vibration problems we are experiencing, I might try to shim the diff to +5 degrees to be inline with the trans. This is not optimal but at least gets to the answer as to whether pinion angle is the culprit for the driveline vibration many experience.