I've been reading so much on this subject trying to figure out the "correct" settings that my head is spinning. I'm tired of reading and would like to minimize the amount of adjusting I need to do so I figured I'd just ask which way should I go.
With the car sitting on it's wheels, the rear of the transmission is pointing down 3*, the pinion is pointing down in the front 2.5*, the drive shaft at the rear is pointing down 0.5*, and is at 0* in the front.
Should I rotate the rear end up or down or adjust the transmission up or down? Can't really go up with the transmission honestly. Keep in mind I'm still riding on leaf springs. 200 lb/in if that matters
The symptoms are I have a bad vibration that comes in around 60 mph. Clutch in/out throttle on/off doesn't matter. The old rear end did this as well only I think it was a slightly higher mph since that was a 3.42 gear and not the 3.90 I have now. It's been too long since I had the car up to those speeds for me to remember exactly though.
In good news, this is the 4th rear I've set up and so far it's dead quiet. Thank you US Gear. The Tru Trac makes for a squirrely good time with my 180k mile stock LT1
Good bye Sumitomos. Your days are numbered.
Thanks