Help to ID 1964-65 Muncie 4 speed

[John Brown]

Originally Posted by Jimlt4383

Ralph,1 ring on the input shift is close 2.20 ratio. 2 rings is wide 2.56 ratio. No rings is m22 on the Muncie factory input shafts.

Early Muncies don't follow the same rules as later ones do. I also had a wide ratio 2.56 (325 case) with no grooves on the input.

[Jimlt4383]

Originally Posted by John Brown

Early Muncies don't follow the same rules as later ones do. I also had a wide ratio 2.56 (325 case) with no grooves on the input.

Thanks, do you know when they started using the rings?

[Jimlt4383]

Looks like 63 through 65 had no groove on the m20 and 1 groove on the m21. I did not know that.