Re: How to Identify a Muncie 4 speed 12-24-02 04:14 AM - Post# 146391 In response to 57Townsman210 There is a very complete web page about identifying the various …
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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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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 …
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New Super Heavy Duty Direct Replacement Heavy Duty M20 or M21 With Muncie Auto Gear Upgraded Ultra Case. Close Ratio or Wide Ratio Gears. 10 OR 26 spline input and large 27 OR 32 spline output shaft. C355 Forged Aluminum …
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The straighter angle was designed to produce less end loading of the gear train and less heat but created more noise, thus the nickname "Rock Crusher" was born. Another misconception is if …
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The M22 Rock Crusher was no longer available as an option. And, eventually, the Muncies were replaced by BorgWarners in 1974. There were usually two "broadcast code" letters added to the end ...
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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 …
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Personally, I think the angles vary from gear to gear. 1st gear on an M22 may be 19 degrees, 3rd may be 20 degrees. Also M22 gear sets were of a higher nickel alloy. The straighter angle was …
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GTO 3-Speed Transmission, 1972 GTO, Heavy Duty 3-speed transmission, Dearborn, Muncie, M13, M12, Muncie M20, M22 rock crusher, Auto Round-Up MagazineA: …
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The term "rock crusher" refers to the noise made by the meshing of the stronger helical gears in the M22. Later model 1971-'74 Muncies are also popular with racers, because these transmissions used a 32-spline output that …
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Complete original GM Muncie transmission rebuilt and guaranteed for 1 year. Correct fit for all 1969 - 1973 model Chevelles and Novas. This one will have the holes on the side where a bolt will secure your shifter linkage levers. This is …
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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 release in …
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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 …
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m22 rock crusher. Jump to Latest ... The above post's are right, except you cannot just rely on the input shaft, case number and such to identify it as an M22. There are virtually …
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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. ... Gear and 27 Splines …
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Muncie M22 Rock Crusher Input 26 Spline $ 182.00 – $ 185.00 Select options This product has multiple variants. The options may be chosen on the product page Muncie 4 Speed Nylon Driven Gear $ 13.00 – $ 15.00 Select options …
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need help identifying this Transmission, body # 3925661,tail shaft 3978764,, P1B01C. ... 1971 and a ratio of C for M-22 2:20 ratio Rock crusher, however these gears are …
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The M22 Rock Crusher would come later to accommodate the heavy twist of Chevrolet's big-blocks in the mid-1960s. The M20 and M21 transmissions produced from 1963-'74 are easy to identify in both ...
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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 had the same gear ratios as the M21 but with a heavy duty gearset.
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We are restoring a 72 Chevelle SS and would like to use a Muncie "Rock Crusher". Is there anyone out there that and tell me the difference between a Muncie M22W and a M22 …
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You can identify several unique signs that identify an M-22 "Rock Crusher," even if it does not have a GM hallmark imprinted on its surface. Step 1 Check the casting number, the production …
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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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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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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". …
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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 …
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Identifying Muncie 4- Speeds. Several things are needed to identify a Muncie correctly. The first is a main case casting number. ... Ratios of the M20, M21, M22. Muncie 4-speeds were …
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The M22 Rock Crusher would come later to accommodate the heavy twist of Chevrolet's big-blocks in the mid-1960s. The M20 and M21 transmissions produced from 1963-'74 are easy to identify in both wide- and …
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I believe all first gen Z/28s were available with only the close ratio Muncies. This would be the M21, which most had, and the M22 which very few had. You're right about the …
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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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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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