Quote: I've hurt my brain a fair bit on this too. I would start with the fact that it eats rear u joints. could a guy put a pipe in the rear yoke and see how parallel it is with the car? I would think that would solve that question. next do you have an adjustable pin snubber? try preloading it and driving see if it changes. I think its in the shaft to rear end angle.
i just finished up sandblasting my other rear housing, then its off to powder coating, tomorrow i had to move the pearches in .800 for the offset shackel. and should have it ready to go my car monday., i do have an adj pinion snubber, but do you think that on jackstands with NO axles in the car that there would be any strain or stress anywhere., its at 1800 rpms @35mph is where i feel it. then it goes away between 45 to about 75 then it comes back. i checked the wheel base and its only 1/8" different from driver to passenger side..