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How to Identify a M22 Rock Crusher

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. If you have the …

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Muncie Calendar Date Codes — D.M.E. Transmissions

1969-1974 codes include a suffix letter at the end to aid in identification of transmission ratios. A = 2.52 1st gear wide ratio M20, B=2.20 1st gear close ratio M21, C = 2.20 first gear Rock Crusher M22. One example code would be ( P0E21 A ) which reads: Muncie four speed aluminum for passenger car, 1970, May, 21st, ratio M20.

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Muncie M22 4 Speed Transmission Rock Crusher Close Ratio …

Muncie M22 4 Speed Transmission, rock crusher heavy duty with all new gears, close ratio 2.20 1st gear, remanufactured with attention to detail and professional assembly, …

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M21 M22 4 Speed Muncie Manual Transmission

Rebuilt Transmission M22 1966-1974 Rock Crusher MTGM038. Rebuilt Overhaul Bearing Kits M21 & M22 Transmission. Kits w/OE Style Bearings. Drawing Image Description Part Number N.I. M20 (63-65) (72mm OD Input Bearing) TRSBK117A N.I. …

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NEW Muncie M22 SUPER ROCK CRUSHER 4 speed $2899.00

The Gear Box is the source for Muncie Parts like the new assembled M22 SUPER ROCK CRUSHER 4 speed kit with micro super finish or downshift case support.

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Muncie M22 Rock Crusher 4 speed

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. Click to expand... 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 to the M22.

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Muncie four-speeds | The Online Automotive Marketplace

The 2.56:1 ratio is commonly referred to as the M20. Muncie also had a second close-ratio transmission designated M22 and often referred to as the "rock-crusher," which was used behind the highest-performance engines and in Corvettes, the M22 is a highly sought-after performance transmission. It is the heavy-duty version of the 2.20:1 ratio ...

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Muncie 4 Speed Transmissions

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 wasn't designed so that you could go drag racing on Saturday night or impress in front of Burger King by doing massive hole shots.

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Rock Crusher identity

The only way to tell an M22 is by looking at the gear set. You cannot go by the old method of "it has a drain plug so it's an M22". Also the input shaft cannot be used as a guide because there are various firms now …

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Muncie M22 Rock Crusher 4 Speed 2.20 Close Ratio …

For sale is a professionally built Muncie M22 4 speed with the driver side speedo tail found in GTOs, Chevelles, Impalas, earlier Corvettes, and other GM vehicles. 10 spline input, 27 spline output. Muncie M22 Rock Crusher 4 Speed 2.20 Close Ratio Transmission Driver Side Speedo | …

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M-22 Rock Crusher 4-Speed Transmissions by JetBoatBill

NEW DESIGN MUNCIE M22 ROCK CRUSHER CLOSE RATIO 4 SPEED. THIS IS THE M-22 TRANSMISSION THAT GM COULD NOT BUILD! Newly designed STATE-OF-THE-ART Muncie front case from "Auto Gear". This is by far the "BEST" replacement aluminum case ever built for a Muncie! The front bearing is a "SEALED" bearing, and slightly thicker than the original …

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Muncie 4 Speed Transmissions

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?

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Muncie M22 4 Speed Transmission Rock Crusher Close Ratio …

Muncie M22 4 Speed Transmission, rock crusher heavy duty with all new gears, close ratio 2.20 1st gear, remanufactured with attention to detail and professional assembly, the case was cleaned and blueprinted to OEM specifications, 1" counter bore with proper leak free interference fit, new gears, synchronizers, bearing retainer, major overhaul kit, 10 spline input …

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1969 CAMARO Z28, MATCHING #'S DZ-CODE 302 & M22 ROCK CRUSHER …

the motor was decked when rebuilt but still retains its original partial vin stamp at oil boss there is a picture in the lisiting. it also retains its numbers matching muncie m22 rock crusher 4-speed transmission and its original 12 bolt posi rear-end with factory 4.10 gears.

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Muncie 4-Speed: The Complete History

This is the current Muncie M22. Your can see that the layout of the geartrain is identical to the ST10's. All gears and synchronizers are in the same position. Notice how the angle of the M22 gears is much straighter than on the ST10. …

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When was the M22 first called "rock crusher"?

The first time I heard the term "rock crusher" was in reference to the transmission in the 1967 L88 Corvette. Due to the low gear angle there is a fair amount of gear noise, really like a medium / heavy duty truck transmission.

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Rock Crusher identity

They used this to reduce friction and in turn gave it a nice greary noise thus the rock crusher. Chris . ... m22 The only way to be sure is to pull the side cover and check the gear angle like the others have stated. Depending on the year of the transmission there are some things to look for, but as vince stated if the parts were swapped ...

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Brand New SUPERCASE M22 4-Speed Muncie …

This a BRAND NEW SUPERCASE M22 Muncie Rockcrusher Style Transmission. 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 …

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Muncie M22 Rock Crusher

1972 Muncie M22 Rock Crusher 4 Speed Counter Transmission ORIGINAL C CODE NO VIN. Opens in a new window or tab. Remanufactured. $3,195.00. Buy It Now +$150.00 delivery. Sponsored. byorcell (3,296) . Muncie M22 4 Speed Transmission Close Ratio With New Rock Crusher Gears RESTORED. Opens in a new window or tab. Remanufactured.

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Muncie Parts

In 1965, GM introduced an even more robust version of the Muncie transmission, known as the M22 or "Rock Crusher." This transmission, with its distinctive whine, became synonymous with high-performance cars of the era. The M22 featured straighter cut gears, providing a more aggressive gear mesh for increased strength and durability.

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Muncie 4 speed....M21, M22, Rock Crusher? | The H.A.M.B.

I currently have an M22 Rock crusher in my '56 Chevy pickup, and have another M22 that was rebuilt about 6 years ago by my father but never used. I also have what I believe is an M21, but I'm not certain. The M22's are both close ratio and the M21 is a wide ratio...again from what I was told years ago.

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Auto Gear Upgraded Ultra Case M22Z Rock Crusher …

STRONGEST Direct Replacement M22 With NEW Muncie AUTO GEAR ULTRA CASE With The Strongest M22z ULTRAWIDE RATIO 4 SPEED TRANSMISSION. A GREAT HEAVY DUTY ROCKCRUSHER FOR YOUR …

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GENERAL MOTORS MUNCIE 4-SPEED MANUAL …

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The 1965 Chevrolet M22 Rockcrusher Transmission: The …

Across the top of the page are the words "First Build 4/15/65 – 1st Shipment 4/19/65, recap of M22 (Rock Crusher) Trans." By comparing these M22 transmission …

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How to Rebuild a Muncie Four-Speed Transmission

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 racetracks to ...

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The Muncie 4 Speed Transmission Taught A Generation Of

The M22 'Rock Crusher' featured a one-inch countershaft pin bore and shot-peened gears with aggressive helix angles that reduced heat and stress but also increased noise, leading to the nickname as the transmissions rattled their way down the road.

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Muncie Identification | The H.A.M.B.

M22 transmissions can only be identified removing the selector cover(side cover) and visually identifying the straight cut gears-all other muncie transmissions had conical cut(angle) gears. The most well known Muncie …

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Muncie Identification | The H.A.M.B.

Although some claim that the M23 is a 'rock crusher', it is indicated that this box was assembled in both wide and close ratio components and also with straight cut gears common to the rock crusher (M22) transmission. Looks like you have a second design-feb. 28th, 1968, M20 or M21. Definitely not a rock crusher(no straight cut gears).

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1968 Camaro SS Documented Factory L78 396/375HP + M22 Rock Crusher!

Ultra rare Factory M-22 "Rock Crusher" 4 Speed! (yes, it is really an M-22 car, one of very, very few built in 1968) ... and highest quality L78/M22 Camaros on earth this is your chance! Serious buyers please contact me for full details or to arrange an in-person inspection. colin@colinsclassicauto-Colin . Year: 2022 Drivetrain: FWD.

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M22 4 speed rock crusher

I have a 1970 m22 close ratio 4 speed from a 1970 ls6 I owned back I the 80s. Here is the info. ... Spending" 3000$ on a bolt on, period correct, grin inducing almighty and mythical transmission that is the great Muncie M22 Rock Crusher makes more sense for many compared to buying a retrofit kitted TKX for 5 000$.

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