my point is, what is acceptable to them, should be different than what is acceptable to our cars. vibration out of a huge truck is common and therefore it is looked past.
it all comes down to a few things;
is it stock? if it is in all aspects including ride height, dont even think twice. set the pinion to the tranny and call it a day. gm wouldnt have designed it not to work (well maybe, it depends on what kind of day they were having).
is it something other than stock? do you have a longer tranny, a different rearend which puts the pinion at a different height, a lowered ride height, etc...??? if you do i would measure the ds at the same time. it only takes a few extra minutes, and instead of just making the angles the same, you could set up the working angles perfect.
tim
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