Guys I have an 02' RCSB 2wd Silvy. Rear is dropped 4'' shackle/hangers. What degree shims do I need to get the pinion angle properly adjusted. I think I need to do this cause I notice a light vibration around 70mph

 

I thought you could buy a shim kit with different degree shims to try.

 

I'll have to try different shims until i find the one that works.

 

Might want to check everything else first. I have 2/4 and never had vibrations (no shims either). my .02

 

I have mine dropped 1/4 and atm i need a 5 degree shim job.for what it's worth.