69 Barracuda Clutch Shake Help Needed.

This weekend though my thoughts are to pull the axles and the 3.23 sure grip gears. Just take a look and see if anything appears abnormal. I've got a spare set of 3.23 gears though a one legger. That won't matter in this situation though with it shaking at ease out. I'll probably stick those in just to eliminate the idea of it being a rear gear issue. Opening the tranny could be next.