Need to know how to tell the difference between the muncie trannys (-m20, m21 m22) what markings are on them that would tell me what iam buying? Also would like to know what markings are on saganaws & borg warners. If anyone could help me.

Thanks
Rickey

Saginaws have the reverse arm in the side cover instead of the tail housing. Stay away from them if you have a high performance engine!

This site should clear up all your questions about muncies.

http://www.5speeds.com/muncie2.htm