— The owner said he used to race it. Unlikely as it seemed, I bought it because it was in very nice shape. Upon getting into the restoration I noticed he had an M21 bellhousing attached to a muncie 4 speed. i called him and asked him if he knew what kind of Muncie it was, he steadfastly said it was an M22 Rock Crusher.
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— The Status Marker information was used by the Muncie plant to help track a problem part. Remember, all of these casting codes should precede the final production code of the transmission.
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Both the wide-ratio M20 and close-ratio M21 debuted in 1963 in the Corvette. The M22 "Rock Crusher" followed four years later. It uses stronger components to handle big-block power. ... The Muncie four-speed was used in a wide range of GM products through the 60s and 70s. However, the Rock Crusher was only equipped in cars that had high ...
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Home of the world's best 4 speed muncie transmissions and parts. We also offer muncie rebuild kits, racing parts and m22 rock crusher transmissions.
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— The Muncie was used with most performance General Motors engines. ... (M20) and the close-ratio (M21). There also was a second, heavy-duty close-ratio version: the "Rock Crusher" (M22) that was ...
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— On the left is the M20 countershaft and 10-spline input shaft. In the middle is the M21 countershaft and input shaft. On the far right is the M22 26-spline input shaft. In the 1970s, virtually all Muncie four-speeds had 26-spline input shafts. 8. The M22 Rock Crusher 26-spline input shaft sports a wider gear for greater torque capacity.
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Muncie M22 Rock Crusher Is The Rarest 1960s Muscle Car Transmission . In the 1960s, the rarest muscle car transmission was the M22 'Rock Crusher' 4-speed manual gearbox. While it is not well ...
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— The Muncie M22 is known as the Rock Crusher. See how we improve its strength and versatility by adding a Gear Vendors Overdrive. Cam Benty Writer John McGann Photographer Nov 04, 2022
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Muncie shifter shafts have evolved in three basic stages. From the left, the small 5/16-18 threaded stud, which snapped easily. The newer 3/8-24 stud still had to fit the rectangular keyway of the linkage arm, and so it had flats milled on each side, but they still broke. The last revision was a bolt-on shaft using a standard 3/8-16 threaded ...
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— There are several interesting features which are special in the 1965 M22. All 1963-65 M20 and M21 transmission used a 7/8″ countergear pin in all assemblies. During prototype testing, this 7/8″ …
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1967 - 1968 Muncie 4 Speed Transmission, M-22 Rockcrusher Complete original GM Muncie transmission rebuilt and guaranteed for 1 year. Correct fit for all 1967 - 1968 model Camaros. This one will have the studs coming out from the side where your shifter linkage mounts, like pictured. This is the Muncie M-22 Rockcrusher four speed.
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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. The Gear Box Transmissions. Muncie-Tremec-Saginaw-TKO-Top Loader-Richmond ... Muncie Parts > NEW Muncie M22 SUPER ROCK CRUSHER 4 speed $2899.00. NEW Muncie M22 …
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Muncie also had a second close-ratio transmission coded M22 and known as the "rock crusher," which was used behind performance big-block engines and in some Corvettes. These M22 units are highly sought-after for performance applications. The term "rock crusher" refers to the noise made by the meshing of the strong-er helical gears in the M22.
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Feel free to upload pictures and ask questions. Some of the best Muncie builders participate on that page. Muncie RPO Codes . Just three types of Muncie 4-speeds are available based on the RPO (regular production option) code used when a car was ordered: the M20 (standard wide-ratio), M21 (close-ratio), and M22 (heavy-duty close-ratio).
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The M22 was eventually dubbed the "Rock Crusher". It is a common misconception that all Muncie transmissions are "Rock Crushers", but it is only the M22 that deserves that name. The M20 and M21 were both …
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— Muncie M22 Rock Crusher Is The Rarest 1960s Muscle Car Transmission In the 1960s, the rarest muscle car transmission was the M22 'Rock Crusher' 4-speed manual gearbox. While it is not well documented, it is estimated that between 1966 and 1974, only 500 to 1200 cars were equipped with the M22 Rock Crusher transmission, making it rare.
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— Muncie Manuals. The Muncie four-speed transmission was heralded by many as an "indestructible" four speed used by General Motors, and found its way into many different car models, behind …
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MUNCIE 4-SPEED MANUAL TRANSMISSION ASSEMBLIES, GEARS & PARTS APPLICATIONS: GENERAL MOTORS 1963-1974 GENERAL MOTORS (HIGH PERFORMANCE) ... L26-s36T: M22 'Rock Crusher' (1971-74) 3978761 WT297-16Z NOTE: these (3) gears used with 26 spline clutch. B2-2 Maindrive Oil Slinger all 3925692 3925762
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— GM's goal with the Muncie four-speed was to produce a better shift employing larger synchro cones. He tells us both the M20 wide-ratio and M21 close-ratio transmissions were first offered in 1963. The M22 Rock Crusher would come later to accommodate the heavy twist of Chevrolet's big-blocks in the mid-1960s.
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— GN unit behind a muncie isnt going to make the muncie bulletproof, its just going to allow you for splitting gears. You may want to consider a new autogear muncie with the thicker case, iron midplate, etc. ... and that trademark rock crusher sound. Being stronger would just be an added benefit. 1966 Charger (383, 727 Torqueflight) 1970 SS …
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— In the beginning, the M-22 was the Heavy Duty Muncie, and it was available ONLY in the close ratio version (2.20:1 first gear ratio). The primary difference between the regular close ratio Muncie (M-21) and the HD Muncie was the angle at …
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— 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 assemblies to Chevrolet's 1965 transmission identification codes, I found a perfect match. ... Since the Muncie transmission plant did most of their own prototype work, they had a ...
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— Muncie four-speeds were produced in two different ratios: the wide ratio (M20) and the close-ratio (M21). There also was a second, heavy-duty close-ratio version: the "Rock Crusher" (M22) that ...
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— The most well known Muncie transmissions are the M20(wide ratio), M21(close ratio), and the M22(rock crusher). Although not mentioned much, there was also an M23 transmission that was used, beginning in 1970. The M23 is recognized by a 26-spline(fine) input shaft and a large output shaft that requires a T-400 driveshaft yoke.
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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 incorrect transmission, your car may not function properly. You can identify several unique signs that identify an M-22 "Rock Crusher," even if it does ...
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— It tells how to pick out what is what but the main thing to look for in a M-22 is the gear angle. Take off the side cover and look at the angle of the gears. M-20, m-21 will have 45 degrees gears and the m-22 is 22.5 degrees. They used this to reduce friction and in turn gave it a nice greary noise thus the rock crusher. Chris
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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 incorrect transmission, your car may not function properly. You can identify several unique signs that identify an M-22 "Rock Crusher," even if it does not have a GM …
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Muncie 20,21,22 Rock Crusher 4 SPD speed transmission in stock with aluminum Bellhousing, clutch plate, release fork pressure plates and flywheel, also Mopar 4 speed overdrive 833, complete 69 Dodge ... $65,000.00. …
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GM Muncie transmission rebuilt and guaranteed for 1 year. Correct fit for all 1967 - 1968 model Camaros. This one will have the studs coming out from the side where your shifter linkage mounts. This is the Muncie M-22 …
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— My 70 used the 11" clutch with 26 splines and the larger 32 spline output yoke, ONLY if it came with a 454 and M22 2 drain plugs on case. Never such a thing as …
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GM Muncie transmission rebuilt and guaranteed for 1 year. Correct fit for all 1967 - 1968 model Chevelles and Novas. This one will have the studs coming out from the side where your shifter linkage mounts. This is the …
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Get the best deals for Muncie M22 Rock Crusher at eBay. We have a great online selection at the lowest prices with Fast & Free shipping on many items!
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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 …
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— Also, there's companies out there that are making new gear set's for Muncie's as well..not just stock replacement stuff either. You can outfit an M20 or M21 with Rock Crusher type gears, OR actually make a 3 speed O/D out of a 4 speed case. Forth being the overdrive obviously.. Kinda nice if you want the Muncie look and an overdrive..
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— In 1970 GM used a Muncie M13 3 speed, they used the trannyin the GTO's from 70-73. Trust me on this, I have researched. ... M21 close ratio and M22 rock crusher, and automatic fans had either a two-speed Powerglide from 1964 through 1966 or, from 1967 on, the three-speed Turbo-Hydramantic M40 option, which would become known …
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