Rear won't sit still... PLEASE HELP!!
 

When I try to do a burnout with my linelock on the rear end instantly kicks to the right really hard. I had a moser 12bolt installed with 33 spline axels and a detroit tru trac. Before the 12 bolt I could do burnouts all day and the car would stay straight. Now as soon as the tires break loose it goes right and I'm talking drastic! Any input you could give me would be much apreciated.
As far as rear suspension goes I have:
BMR Non Adj. LCA's
SLP Adj. Torque arm
UMI Relocation Brackets
QA1 Adj. Shocks
BMR Adj. panhard bar
BMR Sway bar

weak a$$ shock???

Is everything still lined up correctly? Maybe the flanges on the 12 bolt aren't square or whatever, it's happened before.

I didn't install it. How would I find out if its "square"?

What do you have in the rear now, true trac/locker/? That could be the difference right there.