
What you have, if I understand correctly, is a jack shaft set up, using a belt cent clutch and pulley, driving the final chain drive. I hate those.....
If you want to get away from that, you can buy a chain drive cent clutch and the appropriate sprocket to keep the final drive ratio acceptable.
In order for us to give you the best advice,we really need pics to see what you have, and what may be wrong.
EDIT
Reread your last post. You have a TC ((torque converter ) ..... If the belt got stuck, you need a new belt and to clean the driven clutch. Might as well clean the driver clutch too.....