Ok heres the thing when i start the camaro everything sounds fine but i get some lights vibration and when i put it in reverse it makes a loud screeching and if i put it in drive it becomes a low random squeak its not the pulleys or belt and i checked the stall converter and one bolt was a little loose but not too bad to where i can turn it by hand. you guys have any idea what it could be????

 

Can you post an audio? Is the loud screech in reverse a constant screech or a pulsating "scree-scree-scree-scree"?
I would suggest retorqueing the bell housing bolts, especially the upper ones.