i have a b series tranny, i was driving it normal in fifth gear and it sounded like it popped it out of 5th gear, so i put it back in 5th gear and car wouldnt move, i put the car in gear with the car off and tryed to push it the car would move but the tranny made a loud noise and it kinda jump, the car is not suppose to move with the car off and the car in gear, the car does not have lsd, i checked the axels , clutch, i took apart the tranny 3 times now, when i turned one of the axels the other didnt move, so i assumed that it was the differential, i put another one from a car that was running and same thing, when i turn on the car the car idles normal with no weird noises, but as soon as i let the clutch out a little bit, it sounds like if it had a fucked up bearing like a grinding noise, i put the clutch back in and noise goes away, check 2 times the cluch and preasure plate, and trowout bearing. im tired of taking apart the tranny with no positive results i was thinking that it could be the pilot bearing, but the bearing its only like 7k along with the throwout bearing, and its a loud noise does anyone have any ideas on what might be wrong

 

by the way the car goes into all the gears no problem just wont move

 

found the problem, i broke all the tooths inside the clutch where the shaft goes in

 

At least the damage was only on the clutch splines and not on the mainshaft splines too.