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1971 corvette m22 muncie rock crusher how do you know what kind of car came out of

Description: This is a Very Rareand Completely and Freshly Rebuilt M-22 Transmission with REAL GM Rock Crusher Gears for 1970 1971 and 1972 GM Vehicles including, Chevy, Corvette, Camaro, and Chevelle. These first came out in the 1970 Chevelle with the fine spline input and they were then released in the 1971 and 1972 Corvettes and other GM Cars. This has stamped into the M22 Main case: 1971 …

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how to identify a muncie four speed: build date codes
how to identify a muncie four speed: build date codes

Jul 29, 2016 · 1963-1966 production codes will start with the letter P and have four numbers, for example: P0421. 1. P represents the manufacturing plant, Muncie…

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muncie four-speeds | hemmings
muncie four-speeds | hemmings

If the helix angle is shallow (around 20 degrees), chances are you have the M22, or someone has upgraded to the M22 gears. M22 gears are also made of a higher-grade nickel alloy. The M20 and M21 cluster gears are cut at a 45-degree angle. The reduced …

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muncie 4-speed identification guide - chevy diy
muncie 4-speed identification guide - chevy diy

As mentioned previously, we know that the Muncie came with several ratios. Because main cases are often swapped rather than being repaired, the best way to determine if you have an M20, M21, or M22 is to simply look at the gears. Without removing the sidecover you can look at the input shaft and check for identification grooves cut into the spline

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guide to muncie m20, m21, and m22 four-speed transmissions
guide to muncie m20, m21, and m22 four-speed transmissions

Aug 08, 2018 · 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 …

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identify general motors' four-speed transmissions
identify general motors' four-speed transmissions

Jun 13, 2017 · The M20 and M21 used a gearset with a more angled tooth design on each gear (left). The M22 Rock Crusher used a gearset that features less of an angled-tooth gearing (right). Images courtesy chevelles.com. The ratio of the four-speed transmission placed in any car was usually determined by the engine size and rearend axle ratio

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muncie 4-speed - chevelle stuff
muncie 4-speed - chevelle stuff

The M22 transmission has a 20 degree helix angle on the gear set as opposed to a 45 degree angle found on the M20 and M21 and were made with a higher nickel alloy. 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

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muncie 4-speed transmissions | hemmings
muncie 4-speed transmissions | hemmings

Muncie also had a second close-ratio transmission called an M22, which enthusiasts christened Rockcrusher; this was used in performance big-block engines and Corvettes and is a highly sought-after performance transmission today, and is the heavy-duty version of the 2.20 ratio M21 4-speed. The later-model 1971-74 units are more popular with drag racers, because the 27-spline output is stronger, and …

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muncie 4-speed: the complete history - chevy diy
muncie 4-speed: the complete history - chevy diy

The ST10 duplicated the current spline configuration, length, and shifter bolt patterns. The glory days of the 4-speed Muncie were over and BorgWarner once again was back in the saddle. The ST10’s production in GM vehicles was from 1974 to 1988. Because of production quality issues, no Corvettes were produced in 1983

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camaro transmission information & restoration
camaro transmission information & restoration

The M-22 has "straight cut" gears. Due to this, the box tends to be noiser (whines or howls almost like a blower, which is why it's called a "rock crusher") than other boxes. The M-21 has a higher pitch angle on its gear teeth. The close ratio gearboxs generally came with 3.73+ gear ratio'ed cars

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how to identify a m22 rock crusher | it still runs
how to identify a m22 rock crusher | it still runs

Count the input shaft teeth to find out the make of the transmission. Input shafts differ in each GM transmission, so you can easily identify an M-22 "Rock Crusher by its input shaft count. Each transmission has different numbers of teeth. An M-22 "Rock Crusher" …

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gm muncie 4-speed decoding : drivin' it home
gm muncie 4-speed decoding : drivin' it home

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 it will not appear on models with high rear-axle ratios (3.55 or lower numerically) unless someone has changed it

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how to identify a muncie four speed - hot rod
how to identify a muncie four speed - hot rod

Jul 05, 2016 · There also was a second, heavy-duty close-ratio version: the "Rock Crusher" (M22) that was offered on some of the high-performance big-block models, starting with the 1965 Corvette

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