Diff is binding?

[brandon5]

Alright so i had a 4.10 lsd in the car and everything was working fine. Took the car on the street and did a couple aggressive pulls and on the way back to my shop the car wouldn't move. If i stopped accelerating the car would literally stop almost like i was applying the brakes. Limped it to the lane way to my shop after a couple minutes, opened up first gear and it spun the tires the entire way down the driveway (gravel road). But when i was stopped with car in neutral and no ebrake on i couldn't move it for the life of me. So i let it sit for about 20 minutes, jacked the car up with it in gear, stepped on the gas and the wheels spun. The second i let off the wheels stopped. Got flustered and put it on the ground. Took the jack out and it started to roll by itself....

So i assumed the diff was dicked. Just bought a 3. something diff and welded it. Booted it down the street and everything was fine. Did a quick round about and headed back for the shop when it started pulling the back end down. Its not the ebrake, but i dont understand how it could be the diff.

Any ideas?

Btw it has an rb25 in it running around 15 psi. Which is why i though the diff was blown.

[Quadrajet]

I wonder if your rear cross member bushings are so soft, that the whole assembly is pivoting and binding your rear u-joint in the process. Seeing how your problem persisted with another Diff installed.

[jlevie]

My first thought would be the rear brakes not releasing.