This is bad.

I just thrashed on my car putting the third member in it. I had the gears and sure grip installed by a reputable shop. I bought new Mopar green bearings. Everything seemed to go fine except that once I installed both axles I could barely force the rear end to turn by hand. I just attributed this to the rear being a fresh build. I get everything buttoned up and back on the ground. Put her in reverse and back her out. Cool. Put the car in first and she won't hardly move even with a lot of throttle. I have an 8 3/4 3:91 suregrip clutch type third member. Is the sure grip shot and slipping? Is something binding causing the rear to not want to rotate forward. The symptoms act like a burned clutch, but that's not it. Thanks as always guys!