new to forum need help with trans problom

its not the driveshaft. its something with the transy i could here it coming from the bell housing area of the car and when u push the clutch in the it all stops or did anyway till this happened. and i started the car earlier to check for noises and it had a hard time cranking over even with the clutch pushed in so i think its something in the bell housing im hoping its not my flywheel but u never know im going to drop the transmission and take a look this weekend i hope if this storm dosnt snow every body in anyway

ok so i got it out last night..... wasn't good at all i need a new transmission well i guess i can have it rebuilt but its going to cost alot it needs a rebuild kit and a 2 gear installed also the reason why it wasn't pulling the bearings went in the transmission and it put it in a mind and busted two gears there completely gone i think its the input shaft pully? not sure and the one it sets on underneath it on the front of the transmission so its pretty bad in there idd say for what it would cost me to rebuild it i could prob buy a used tranny with a warranty. i was looking around i im kinda fuzzy on this im hoping maybe you all can help me out a little on this can i put a v6 5speed in my car will it bolt up to my gt bell housing or will i have to change stuff on it? i can buy a v6 5speed for about 400 bucks guaranteed to be working