might be your throw out bearing....

 

throw out bearing? whats that? would it be necessary to just get a new tranny. cuz my cars onli a d series and i was planning to just get a new or diff tranny anyways.

 

Noise from inside the tranny would go away when you push the clutch pedal down. Noise from the throwout bearing would only occur with the clutch pedal pressed down. If you have a whirring/grinding noise in neutral that's just the bearings on the transmission input shaft. It's inside the transmission but you can open it up and change those rather simply without needing a whole transmission.

 

It pops out of gear? that might be your clutch because if the tranny is bad, then you would be in gear and you just hear your engine rev up and you go nowhere

 

"Poping out of gear" can also be caused by the shift linkage or faulty motor mounts that let the engine move and pull on the linkage. If it grinds when you try to shift to reverse with the engine running and the car fully stopped, that means the clutch doesn't disengage fully.

 

ive been looking and have had a hard time to find one, this sucks. im still half way tempted to have someone just totally rebuild it even though ur prolly right about the whole middle man thing.