Tyler, I accidentally found some years ago that a vibration on acceleration CAN come from a single slightly loose halfshaft bolt (out of 16). This can also happen from stock lock-washers, which are prone to crack and eventually fall out, leaving that bolt(s) woefully loose. I do not recommend using lock washers on the halfshafts at all, and I play around with the ZF until I can get the halfshaft bolts in from the ZF side. Then, an open-end wrench can hold the bolt head and a proper torque wrench can be used on the nut.
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