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Re: Checking Driveling Vibration & Calculating It.
I skimmed through quickly and noticed a couple things:
a) Angles relative to ground do not matter. The u joint working angle is relative to the components affecting the joint (ie, engine trans angle vs shaft angle, or shaft angle compared to rear angle pinion nose angle). Normally one checks off the u joint cup; rotate the shaft 90 degrees and check the angle of that cup and subtract the two. I try to explain the angle directionality as either "holds water" (ex: \/) or "sheds water" (ex: /\).
b) You must have the suspension compressed to the normal ride height. You can't have the rear suspension hanging or all your efforts are wasted.
K
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