Pinion angle

[Alan Roehrich]

That's a place to start, at least in my opinion, for whatever that's worth.

Have you taken your springs and shocks off, and used a floor jack to move the rearend through it's travel to the limits to make sure there is no binding, and to see how the pinion angle changes? You should make sure you check it all carefully, especially at the point where the car launches. The rear suspension should separate in order to plant the tires, and you need to check the pinion angle with the rearend at the point of its travel that it is at when the car launches.

Have you checked all of the attachment points for the suspension, and all of the weld joints in the rear frame? You need to make sure there's no flexing or cracking going on back there, it is not at all uncommon to see things moving around back there when one of those cars is raced.

[Dion Hildebrandt]

I have checked the diff for range of motion but not for pinion movement, I did an initial check of the chassis and on the surface everything seems ok. I am going to look at the mounting points closer, I'm kind of hoping I find something broken as this problem rose up from nowhere it seems. Upon talking to other stocker guys many seem to have run or are running the stock oem shafts with little to no problem. I really appreciate all the feedback and opinions keep them coming ,I dont want to add to the expensive pile of crap on the garage floor. haha