Here is my current setup..
body Mazda 6
tyres f/r 37/37 or 40/40 (though anywhere from 35/35 to 45/45 depending on track)
sway bar f/r normally 45deg/45/deg
front hub position 2 (middle hole on knuckle)
Camber f/r 2/3
springs f/r White/Yellow
toe f/r -1/-2 (I used to run -3deg on rear to help with loose rear but went to -2 to help with more onpower steer)
rear dif oil rear 100k (might help stop chomping ur gears with less diff action, even 1/8 buggies kill diff gears when unloading too much)
front 1 way
ride height 6mm/6mm
shock oil f/r 35wt/35wt
shock piston f/r 2 holes small/2 holes large
shock tower f/r 1/1
lower arm f/r 2/3
Also try adjusting the rear top linkage to the lower hole on the rear hub (less angled arm) See http://p202.ezboard.com/fofnaracingn...picID=38.topic
Also if your centax is just set too high you might be trying to put too much power down? Lots of things you can change, whats your camber settings compard to what im running?
, my diffs sounded like that when new in the LD3. I just make sure I have the slightest bit of movement between the gears when shimming the diffs.