Hey there russ, rob, ken, anyone else...
Ken - I got enough backlash in my rear diff that I should get it attended too. Had the car on a hoist at a local performance shop the other night to check it out. I was told that it was prolly something to do with a spacer type thingo (sorry cant remember exactly) that would need to be replaced inside the diff where the tailshaft connects. I think it is compliments of a lack of experience launching the car from the one time I went to the drags.
Anyway - to cut a long story short - can you tell me where to go?