About

About Muncie4Speed.com

Muncie4Speed.com is a technical reference and buyer resource focused on identifying, verifying, and valuing GM Muncie 4-speed manual transmissions.

What This Site Is For

Helping buyers avoid overpaying for misidentified transmissions
Providing clear M20, M21, and M22 identification guides
Supporting restorers with comparison tables and rebuild parts references
Offering lightweight tools for identification and value screening

Important Disclaimer

This site provides informational guidance only. Final authentication and value should be based on in-person inspection, serial/date code verification, and professional evaluation when needed.

Some links may be affiliate links used to support site operations.