Wheels lock up

[Jeff822]

Well I just put a new transfer case on today after pulling my other one off and finding it to be destroyed, took the car for a spin and it drove fine. I brought it home and went to back it in the garage to check the brakes out and while in reverse after like 2 feet the wheels locked. I took the transfer case back off, took it apart to check it out then put it back on and went to leave again and started backing up and the wheels locked up again. I put the car in neutral on the incline and it was stopped dead, tried pushing it and it wouldn't move. Then put it in first and pulled it back in the driveway. The guy I bought the car off of said the car had a newer rear in it if that helps any. The number on it is B1G I beleive.

 

[cruisintalonawd]

new rear what???bumper? take the cover off the rear end to check it

 

[talon187]

check the splines on the transfer case and the input shaft sounds like they are not the same