You mentioned that you rotated the tires but did you have the tires balanced also?I adjusted the pinion angle. Best I can measure it's about 0.8*.
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Vibes are the same. I rotated the tires and no change there.
Vibes are definitely more pronounced under load. Going up hill the vibes are much worse than coasting down hill at the same speed.
In 4wd the vibes are less. Not sure what to make of that. May be reduced load on the rear driveshaft.
I guess next step is the pull the rear driveshaft to confirm that's the problem and inspect as best I can.
no just swapped front to back, flipping l/r on the rear. Idea is that if the unbalanced tire is in the front I'd feel it in the steering wheel, but I never did. Also a good thing to do to keep tire wear even, so I figured it was worth doing either way.You mentioned that you rotated the tires but did you have the tires balanced also?
I'm interested in what you find here as I'm dealing with a similar situation.
Personally it's only the front axle u-joints I'd worry about with respect to strength but everybody has different needs. I ran Moog in the front and they wore out quick but for the driveshaft I wouldn't worry.