OK, Here goes...

It starts slightly about 70 and is pretty noticable by 80. The faster I go, the worse it gets. I've had the driveshaft balanced, flipped it 180, had the axles checked, rebalanced the wheels... I'm having the driveshaft checked again tomorrow, ( maybe they had a bad day last time but from what i've heard, they're the best in the area.) and if it still looks balanced to them then I'll put in a new rear end yoke... Anyone else have any ideas? It's got a moser 12 bolt in it, so if the driveshaft needed to be shortened would that cause a vib?

Please help and thanks a lot.

 

Are you running lca relocation brackets and if so, at what setting? What is your pinion angle set at?