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Park it, put it in N, set the ebrake. Crawl under and wiggle the driveshaft while looking at the ujoints. If it's vibrating, you'll see and feel the slop in the joint. There will be some backlash in the rear end gears, so don't let that fool you.


There is little bit of slop, but it does not seem extreme. I can imagine it move around alot more under torque from the engine. It's significantly less than the amount of backlash in the rear end gears.
Think it could be the issue? ideally A driveshaft should not have any play at all right?

95 Montero SR- Stock
90 Turbo Miata - TD04 wrx turbo, Flyin miata suspension, Torsen diff, 225 RS3's
92 Mighty Max 4x4 - Retired