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So you say -4deg. I've seen it written that the tail shaft and the pinion angle should be the same only on a different plane. Is this running angles or at rest angle? My traction bars have 1/2" clearance to the snubber so they don't allow much axle wrap before they cantact. I assume the trans a...

Thanks for the reply Jim. I guess I should've given some background on the car. It's a 69 Firebird that I have replaced, or swapped out, just about everything at one time or another. Motor mounts. trans mount(poly), swapped trans out with another M20, replaced all shocks with new KYBs(gas adjust). A...

I've had this problem for a long time now. It's a high speed vibration. I don't generally get into the 100+ range so it doesn't happen too often. I notice it at or near the end of a quarter mile run when my speed is approaching 100 or so. The gearshift lever gets pretty violent. Once it got so bad t...