Do you have LSD??? (limited slip diff.)

 

Yes LSD

 

Change the fluid in the rear, and make sure it has the proper amount of additive for LSD.

As for the 'shakes over bumps'...... I am just not sure what's up with that.... Could be a loose connection somewhere, the presents itself when you hit a bump. (perhaps that number 4 injector connector?)

 

Ok so i replaced the extension housig seal on t case and the seal for the rear axle driveshaft in differential. The pinion yoke nut was loose. I tightened it the best i could but i doubt i hit the 210 ft lb mark. Any ideas how to tighten it up im havig trouble keeping the differential from spinning.

 

Impact wrench.

Barring that, have someone step on the brakes.

Or, use something long enough, that will hold the yoke in place, and brace it against the ground.