Part of a Muncie synchronizer assembly. Fits all models with the M20, M20, and M22 transmissions.

I'd Like to Know:

I would like to know what these items are, what they do, what they go to, what they’re used for, how old they are and who manufactures them. Thanks!

Item History: N/A

Size: The bigger gear is 4-1/8" OD and is approximately 3-1/8" ID. The smaller gear is 3-1/8" OD and is 1-3/4" ID.

Markings: None