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Muncie 4 Speed Transmissions. Although the gears are not spur gears completely straight they still produced a fair amount of gear noise thus the rockcrusher name these 4 speeds sound like a blower drive for the real gear head the best documented movie that sports a real m22 in a car is the famous movie two lane black top you can really hear this gear box howl in the background as james taylor ...
Aug 10, 2015· Muncie 4 Speed gasket and seal differences and installation techniques discussed.Get the Gaskets HERE: #1 BOOK ON MUNCIES IS:
Muncie 4-speed Transmission (Group 4.000) 3851325 (1) (1) The M22 case casting is unknown at this time. 1967 - 1972(2) 1965 - 1970(1) 1970 - 1972(2) (1) All M22 applications except 454 engine. (2) All 454 Chevelle applications. The M22 was produced in 1973 and 1974 for other GM divisions.
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 …
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Muncie 4-speeds (M20, M21, and M22) are some of the most popular manual transmissions ever made and continue to be incredibly popular. The Muncie was the top high-performance manual transmission GM offered in its muscle cars of the 1960s and early 1970s.
Aug 07, 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 from 1963-'74 are easy to identify in both ...
how to identify m21 rock crusher 4 speed– Rock Crusher 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 1963 but it wasn t until 1965 that the M22 hit the market The M22 was created ...
Get Prices Live Chathow to identify m21 rock crusher 4 speed Muncie 4 Speed Transmissions Muncie 4-speed 1964 to 1968 Muncie 4-speed transmissions can be identified from later models by the way the transmission arms attach . Details. M 22 Rock Crusher Transmissions For Sale - Felona.
Sep 15, 2010· On this document the 4 speed transmission option code listed the transmission as an M20. In 1965, all 4 speeds were ordered initially by the M20 4 speed designation. Depending upon the rear axle ratio, Chevrolet supplied either the M20 wide ratio or M21 close ratio transmission …
How to Identify a M22 Rock Crusher It Still RunsAn M-22 . Muncie 4-Speed Identification Guide - Chevy DIY. 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 overdrive.
The 4-speed design of the T10 and Muncie is a very "forward" design. Whether it was a series of lucky choices, or happy accidents, the 1957 design allowed for improvements. Other muscle car transmissions of that era, such as the Ford Toploader and Mopar A833, left no room for improvements because of the layout and initial design of their ...
Muncie transmission rock crusher how to identify a m22 rock crusher it still runs 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 ca...
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 from 1963-'74 are easy to identify in both ...
Jul 09, 1999· The M21 is a standard Muncie 4 speed. They both have the same ratios beginning with a 2.20 1st. The M20 is the "wide ratio" version which begins with a 2.52 1st gear. I know that the M20 came in cars with a standard rear axle ration ( 3.31 in my '67 ), while the M21 came in higher (numerical ) …
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.
Noting its location in situ can also identify the variation. The M22 or so-called Rock Crusher usually partnered up with big-block engines. Serial Number. The serial number is where the money shot lies. It offers a lot of information to complete the story of the four-speed manual transmission. This figure is usually stamped and not a part of ...
Muncie 4-Speed . The regular productions codes identify an M-20 M-21 and M-22. Of the regular production codes one particular Muncie 4-speed type appears. A properly set up M-22 Rock Crusher transmits up to 700 hp so this stout transmission is a wise choice for high-performance applications as well as authenticity. Chat Online
Step 4. Look for the "GM" sign imprinted on the transmission box to identify the manufacturer of the transmission. Check whether there are any rings around the shaft splines. An M-22 "Rock Crusher" has no rings, so if you see rings in your transmission, it means it is not an M-22 "Rock Crusher." 00:00.
The progression of the 10-spline input identification groove system. From left to right, early M20, M21, later M20, and M22. You really cannot get the early M20 and M22 mixed up because the early M20 came with a 7/8-inch countershaft, while the M22 did not. In fact all of the upper-speed gears have the same tooth count regardless of ratios.
Feb 09, 2011· Serial numbers for Muncie 4 speeds always begin with the letter "P". P stands for Muncie Plant. Not for passenger car as some self proclaimed specialists may think. The letter M was used to ID the Muncie plant for the Muncie 3 speed, so P was the next logical letter. The letter O would add confusion since it resembles zero.
Muncie 4-speed Transmission (Group 4.000) -. Casting Numbers. (1) All M22 applications except 454 engine. (2) All 454 Chevelle applications. The M22 was produced in 1973 and 1974 for other GM divisions. All wide ratio transmissions are designated M20 and close ratio transmissions are designated M21 or M22 depending on the gear set.
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 M21 four-speed.
Jul 15, 2013· 5 speed will give you the best of both worlds. I proved it to myself that the close ratio m21 or m22 is 2/10ths and 3mph difference. You want the 2.56 first gear, I have the m22 wide ratio maserio gears with a 4.30 in the vette and a m20 with 4.10's in the Camaro, make sure you bush the case and use A steel mid plate.
Several things are needed to identify a Muncie correctly. ... 1964 to 1968 Muncie 4-speed transmissions can be identified from later models by the way ... of the gear train and less heat but created more noise, thus the nickname "rockcrusher".
Nov 23, 2014· Check the numbers on a Muncie. They will tell you if it is a M20, M21, or M22. Also, it will have a partial VIN on it that will identify whether it came from a Chevy, Pontiac, or other GM. Also, often, that partial VIN will tell you the model of the car by looking at the assembly plant code.
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 …
Muncie 4 speed transmissions were used in General Motors cars from 1963 to early 1975. These gear boxes were used when power levels exceeded the limits of the early Borg Warner T10 4 speed. It was actually based on the T-10 design and uses the same basic gear layout.