i have a 68 camaro how can i tell what transmition i have in the car now

 

Depending on the model there's a wide variety of trannys that came in '68 Camaros,3 speed stick,a couple of different 4 speed sticks Saginaw or the stronger Muncie either M20,M21 or M22,2 speed Powerglide autos,3 speed Turbo 350 and Turbo 400 autos.
Does it have a trans in it now or is this a project you need one for?
It would help if you gave more info like if it's a stick shift 3 or 4 speed or an automatic 2 or 3 speed or if it's been upgraded to a newer 4 speed auto.
Maybe a picture or two.