Uploaded August 2025 | Updated September 2026, 8 hours ago
In this video, we take a deep dive into the GM four-speed manual transmissions used in passenger cars from 1957 to 1973. If you’ve ever wondered how to identify or understand the different four-speeds that General Motors used, this is your starting guide to GM 4-speed transmissions.
We’ll cover the Borg Warner T10, the legendary Muncie 4-speed (M20, M21, and M22 “Rock Crusher”), as well as the Saginaw 4-speed. You’ll learn the differences, identification tips, and why GM used each of these gearboxes in everything from Chevrolets and Pontiacs to Buicks and Oldsmobiles.
Whether you’re restoring a classic muscle car, troubleshooting your drivetrain, or just want to understand GM’s transmission history, this guide has you covered.
👉 Don’t forget to Like and Subscribe for more classic car tech, history, and restoration tips!
Link:
documents.holley.com/techlibrary_manual.pdf
Episode 709 Autorestomod
Sponsors:
npdlink.com
Insta: @npd_nationalpartsdepot
eatondetroitspring.com
Insta: eatondetroitspring
Facebook: facebook.com/eatondetroitspring
#GM #Muncie #BorgWarner #Saginaw #ClassicCars #MuscleCars #Transmission #CarRestoration #GMHistory #ManualTransmission
In this video, we take a deep dive into the GM four-speed manual transmissions used in passenger cars from 1957 to 1973. If you’ve ever wondered how to identify or understand the different four-speeds that General Motors used, this is your starting guide to GM 4-speed transmissions.
We’ll cover the Borg Warner T10, the legendary Muncie 4-speed (M20, M21, and M22 “Rock Crusher”), as well as the Saginaw 4-speed. You’ll learn the differences, identification tips, and why GM used each of these gearboxes in everything from Chevrolets and Pontiacs to Buicks and Oldsmobiles.
Whether you’re restoring a classic muscle car, troubleshooting your drivetrain, or just want to understand GM’s transmission history, this guide has you covered.
👉 Don’t forget to Like and Subscribe for more classic car tech, history, and restoration tips!
Link:
documents.holley.com/techlibrary_manual.pdf
Episode 709 Autorestomod
Sponsors:
npdlink.com
Insta: @npd_nationalpartsdepot
eatondetroitspring.com
Insta: eatondetroitspring
Facebook: facebook.com/eatondetroitspring
#GM #Muncie #BorgWarner #Saginaw #ClassicCars #MuscleCars #Transmission #CarRestoration #GMHistory #ManualTransmission
