Muncie 4 Speed Transmission Diagram

Any variation of that gear will have a letter after the 12. There are three basic types of muncies.

Introduction To Rebuilding Gm Muncie 4 Speed Transmissions

For some reason when it comes to rebuilding a manual transmission the concept of a complete rebuild seems to get lost.

Muncie 4 speed transmission diagram. 315 471 8141 fax numbers. Muncie general motors 4 speed longitudinal transmissions were developed in three distinct models the muncie m20 wide ratio manual transmission the muncie m21 close ratio manual transmission and the muncie m22 heavy duty close ratio manual transmission. 315 471 8146 or 800 537 4213 auto gear equipment.

So 297 12 297 12a 297 12b are all first gears for muncies but for different. General motors 1963 1974 general motors high performance auto gear equipment 530 state fair boulevard syracuse new york 13204 800 634 3001 inside new york. And updated step 18 in the transmission assembly section near the end.

Oct 22 2015 added note about the input shaft cage with needle bearings during the install. One of the most common swaps involves a muncie 4 speed. The new base transmission was a muncie heavy duty 3 speed manual transmission that was related to the muncie 4speeds.

There are 2 basic ratiosclose and wide. These are easy to adapt to a wide range of hot rods. The number 297 12 is a muncie 1st speed gear.

It was also used in non chevys in the pontiac tempest and oldsmobile f 85cutlass models. Home diagrams muncie rebuild numbers. A muncie differs from a saginaw transmission in that its reverse lever is in the tail housing not the side cover.

Chevrolet muncie transmission parts m20 m21 m22. Refresh your page with f5 so you know you have the latest updates. M20 m21 and m22.

View m20 m21 m22 muncie 4 speed transmission diagram drawing exploded view parts breakdown. The 1971 transmissions were the same as from previous year except that the m 21 close ratio 4 speed transmission was replaced with a stronger version of the muncie close ratio gearbox the famous m 22 rock crusher 4 speed. Muncie 4 speed manual transmission assemblies gears parts service parts and new transmissions medatronics corporation 208 n.

The easiest way to identify a muncie transmission is by its side cover. The muncie 256 to 1 ratio gearbox became the commonly used unit for four speed applications beginning with the 1964 chevelles and novas. Transmissions are an essential part of hot rod builds.

Muncie diagram drawing follow. Us hwy 1 unit 1. The close ratio gear boxgives you a fairly high first gearwith the rest of the gears fairly close togetherfor less rpm drop on your top end.

General motors muncie 4 speed manual transmission assemblies gears parts applications. Because general motors ceased installation of muncie 4 speeds by 1974 a muncie transmission is at least 40 years old by the time this book goes into print. The muncie 4 speedwas first designed in 1963and lasted until 1974.

Muncie 4 Speed Transmission Parts