The Muncie four-speed is as legendary as the cars that it was put into, with the M20, M21, and Rock Crusher M22 models all part of the hot rod vernacular. From the OEM factories to...

The Muncie 4-speed transmission was used with many different GM models and engine combinations from 1963 through 1974. The basic design and operation theory of the gearbox changed little during this period, …

1. P represents the manufacturing plant, Muncie. 2. 04 represents the month code when the unit was assembled, April. 3. 21 represents the day of the month the unit …

Further Muncie identification 3 Muncie 4 speeds were offered. The M-20 wide ratio, the M-21 close ratio, and the "Extra heavy duty close ratio" M-22, also known as the "Rock Crusher". The M-22 was generally installed behind severely powerful (high torque) big-block engines. The M-22 is distinguished from an M-21 by the angle of the gear teeth.

Reply Save Like 1 - 7 of 7 Posts D Deuce · #2 · Feb 22, 2003 I do not claim to be a transmission expert and could be wrong but the "real" rock crushers had straight cut gears....not helical cut gears. I believe they were first released by GM in 1969 or 1970. I had one in my 1970 Chevelle SS 454-450HP LS6 car. I bought it new.

Complete New M22 SuperCase Transimissions include legendary Italian gears and shafts by Masiero, synchronizers by Euroricambi and Auto Gear's own thrust-button SuperCase, aircraft grade aluminum, 'Oilite' …

This is a Completely and Freshly Rebuilt Original 1965 M20, (M-20), Muncie Wide Ratio 4 Speed Transmission. (no aftermarket or imported gears), and the coarse spline small output shaft. Originally installed in 1965 Chevy, Corvette, Camaro, and Chevelle. ... Small & Big Pin Muncies, Muncie Rock Crushers, Super T-10 Borg Warners, Doug Nash 4 + 3 ...

Pontiac (GM) 4-speed Transmissions: 1936-55: M11: Buick Light-Duty: 1960-64: M20: Borg-Warner Early T10 Wide Ratio – Released Jan 1960: 1956-57: M13: ... For example, a '65 Corvette "Rock Crusher" M22 4 …

The most popular question has to be that everyone thinks they have the famous "rockcrusher" M22 4 speed. This had the same gear ratios as the M21 but with a heavy duty gearset. The reason you may ask? Well it …

Complete New M22 SuperCase Transimissions include legendary Italian gears and shafts by Masiero, synchronizers by Euroricambi and Auto Gear's own thrust-button SuperCase, aircraft grade aluminum, 'Oilite'-bushed …

The Gear Box Transmissions. Muncie-Tremec-Saginaw-TKO-Top Loader-Richmond. Home: View Cart: Muncie Kits & Parts: T56: T56 Corvette GTO CTSV: TR6060 / T56 Magnum: T10: Super T10: TKX: T5: ... Muncie Parts > NEW Muncie M22 SUPER ROCK CRUSHER 4 speed $2899.00. NEW Muncie M22 SUPER ROCK CRUSHER 4 speed …

This is a Completely and Freshly Professionally Rebuilt Original 1970 M20, (M-20), Muncie Wide Ratio 4 Speed Transmission, (no aftermarket or imported gears). Chevy Corvette Camaro Chevelle Full Size …

This is a BEEFY version of the original Rock Crusher transmission. Most all the weak points of an original Muncie have been solved by the Super-Case design. The Supercase has extra casting in all the known weak areas. The mid plate is aircraft grade aluminum. The tail housing has also been beefed up.

An M-22 "Rock Crusher" is a Muncie four-speed transmission for cars made by General Motors in the 1960s. Identify a transmission type correctly before fitting it into your car. …

Chevy Transmissions: Muncie M22 "Rock Crusher 4 Speeds were made From 1965 TO 1974: The most popular transmission of it's time for high performance cars built for Chevrolet and all performance oriented G.M …

Saginaw 3 & 4 Speed Transmission Gasket & Seal Kit - All GM Products (#1) w***l (122) - Feedback left by buyer w***l (122). Past month; ... Rock Crusher M-22 Transmission. The transmission functions like a brand new transmission! It was shipped in a sturdy crate. Seller installed a new pencil gear to match the rear end …

302 Z28. · #5 · Aug 18, 2003. palcu said: I had a 71 GTO with a M22 "rock crusher". This was an absolutely stout transmission. Had a distinctive "whine" due to the slanted gears. M22 had straight cut gears, all other Muncies had helical cut gears. The straight cut gears gave the M22 it's different sound. Other Muncies were quite compared …

The early production Muncie four-speed case is the small-bore unit and can be identified by the GM casting number 3831704 (see Muncie M20/M21/M22 Main Case …

103 sold Sponsored Muncie Close Ratio - M-22 Rock Crusher Four Speed Transmission - ALL NEW GEARS Refurbished 11 product ratings $2,695.00 naz130 (4,666) 99.6% Buy It Now +$100.00 shipping Last one 45 sold Sponsored 68-69 C3 Corvette M22 Muncie 4Speed "ROCK CRUSHER" Trans-10 Spline Italian Gears Refurbished $2,995.00

I have 67 Camaro with a factory M20 4-speed. The synchronizers are going bad and its time to replace the trans. The engine has been freshly built and pushing 450-500HP I am looking at either a Keisler 5-speed or the legendary M22 Rock Crusher from Midwest Muncie.

The Muncie four-speed was produced in two ratios: the wide ratio (M20) and the close-ratio (M21). That being said, there was a …

If you've ever driven a classic muscle car equipped with a four-speed manual transmission, you probably experienced the joys of commanding a Muncie Rock Crusher.

January 25, 2022 4 speed, four speed, identify, manual, muncie, transmission How To Identify A Muncie Transmission Few things are as fun in a …

The Muncie transmission began replacing the Borg-Warner 4-speed transmission on Wednesday, February 6, 1963, when the first Muncie 4 speed transmissions were shipped to the Baltimore Final …

M-22 "Rock Crusher" Identification. The M-22 close-ratio transmission is easily identified internally from the M-20 and M-21 versions by the angle of the gear teeth. The M-22 was only produced in a close-ratio version, so …

Serial numbers for Muncie 4-speeds always begin with the letter "P," which stands for Muncie Plant (not "passenger car.") "M" and "N" were used to identify 3-speed Muncies; "O" identifies the Saginaw 3-speed with …

The best way to ID the transmission is to count teeth. Muncie 4 speed spline, groove and tooth count characteristics. Note 1: M-20 gear ratio: 1st 2.56:1, 2nd 1.91:1, 3rd 1.48:1, 4th direct Note 2: M-20 gear ratio: 1st 2.52:1, 2nd 1.88:1, 3rd 1.46:1, 4th direct, Rev 2.59:1.

Even in this era of five- and six-speed conversion swaps, Muncie four-speeds (especially M22s) command top dollar today. We've seen Rock Crushers for sale at swap meets for up to $2,000.

Muncie M-22 Rock Crusher Four Speed Transmission - RARE Drivers Side Speedo . Opens in a new window or tab. Refurbished. 5.0 out of 5 stars. 5 product ratings - Muncie M-22 Rock Crusher Four Speed Transmission - RARE Drivers Side Speedo . Buy It Now +$100.00 shipping. Last one. 103 sold

The 1965 Chevrolet M22 Rockcrusher Transmission: The Mystical Transmission by Alan Colvin on September 15, 2010 Although all previously published data has denied or excluded the existence of the …

Designated "T10" by Warner, the new four-speed debuted in late-year 1957 as an extra cost option on the Corvette carrying Regular Production Option (or RPO) 685. Production records indicate...

This is a BEEFY version of the original Rock Crusher transmission. Most all the weak points of an original Muncie have been solved by the Super-Case design. The Supercase has extra casting in all the known weak …

How to Identify Muncie 4 Speed Transmissions Identifying Muncie 4 Speeds III by Paul Cangialosi The most popular question has to be that everyone thinks they have the famous "rockcrusher" M22 4 speed.

This is the Muncie M-22 Rockcrusher four speed. Designed for the highest performance models. Bulletproof strength with more flat cut gears, makes a beautiful whine. If you want the mack daddy, here it is! *Please double …

This Heavy Duty 3-speed, depending on year, is called either a Dearborn (1965-1969) or a Muncie (1970-1973) M13 unit, and utilizes the code M13 on the sheets. Surprisingly, a 3-speed transmission was the standard transmission for all GTO's from 1964 through 1972, although in its initial year of 1964, the 3-speed was an M12 unit …

The M21 & M22 is a four speed, RWD or 4WD transmission. The M21 & M22 is a Muncie engineering design, this transmission is aluminum case, extension housing and side cover. The side cover has seven bolts and two shift cams. The synchro rings have 35 teeth and the unit has a 4 step cluster gear.

New Super Heavy Duty Direct Replacement and Strongest M22's Made With Muncie Auto Gear Upgraded Ultra Case and Strongest M22 Close Ratio or Wide Ratio Gears. 10 OR 26 spline input and large 27 OR 32 spline output shaft. C355 Forged Aluminum Mid-Plate. Super Tail. AG Roller Side Cover.

GENERAL MOTORSMUNCIE4-SPEED MANUAL TRANSMISSION ASSEMBLIES, GEARS & PARTS APPLICATIONS: 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: (315) 471-8141Fax Numbers: (315) 471 …

4 Gear Trans Co. Muncie M22 "Rock Crusher 4 SPEEDS FROM 1965 TO 1974: This page is devoted to OEM Complete units; New aftermarket units and OEM parts and NOS parts. We have rebuild kits in stock and ready for shipment. ... This is an example of a OEM 1965-69 M22 4 Speed. It has 10 Splines on the Input (Clutch) Gear and 27 Splines on the ...

4-SPEED MANUAL TRANSMISSION ASSEMBLIES, GEARS & PARTS APPLICATIONS: GENERAL MOTORS ... GENERAL MOTORS "MUNCIE" FOUR SPEED 10-1-01 6 GROUP A: MAINSHAFT A1 Yoke Stop Snapring ... L36-s36T: M22 'Rock Crusher' (1964-74) 3924796 WT297-12B NOTE: these TWO (2) gears w/o snapring counterbore on cone …