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rock crusher transmission codes

muncie 4-speed transmission (group 4.000)

muncie 4-speed transmission (group 4.000)

The 2.20:1 ratio first gear is usually referred to as the Muncie M21 transmission; based on GM's production codes. The 2.56:1 ratio is referred to as the M20. 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

list of astm international standards - wikipedia

list of astm international standards - wikipedia

This is a list of ASTM International standards.Standard designations usually consist of a letter prefix and a sequentially assigned number. This may optionally be followed by a dash and the last two digits of the year in which the standard was adopted

transmission: c3 corvette restoration guide

transmission: c3 corvette restoration guide

The M22 is a strong and reliable gearbox. Produced in low volume from 1968 to 1971, the M22 earned the nickname “Rock Crusher” because its straight-cut gears made a distinctive noise while driving. It was designed for maximum performance and could usually be found installed behind L88s and other high-torque big-block engines

powerglide transmissions | hemmings

powerglide transmissions | hemmings

The 1962-and-up aluminum units can also be identified by a source code on the passenger side of the oil pan. These codes were alphanumeric. Pre-1967 source codes were five or six digits long. The first letter designating a Powerglide usually was the letter "C," indicating it was built in …

how to identify a muncie four speed: build date codes

how to identify a muncie four speed: build date codes

Jul 29, 2016 · Remember, all of these casting codes should precede the final production code of the transmission. All of the casting codes should be within 30 to …

1969 chevrolet nova ss | hemmings

1969 chevrolet nova ss | hemmings

TRANSMISSION A floor-shifted HD Muncie MC1 three-speed manual was standard. Four-speed options included a wide-ratio Muncie M20, a close-ratio M21, and a close-ratio HD M22 (aka "rock crusher"). An 11-inch clutch was used with manual transmissions

commodity codes look-up | purchasing

commodity codes look-up | purchasing

This look-up uses the National Institute of Government Purchasing Codes (NIGP). For a detailed explanation of the NIGP Code used, please visit our NIGP Code Explained webpage. To use this look-up, click on a commodity category below to view selected class item commodity codes

star trek: insurrection | memory alpha | fandom

star trek: insurrection | memory alpha | fandom

"The captain used to cut quite a rug." Aboard the USS Enterprise-E, Doctor Beverly Crusher fusses over the collar on Captain Jean-Luc Picard's dress uniform in the captain's quarters.Reading from a PADD, Counselor Deanna Troi repeats an alien greeting for the captain to memorize: "Yew-cheen chef-faw, emphasis on the 'cheen' and the 'faw'." Similarly decked out in his dress uniform, Commander

how to identify a m22 rock crusher | it still runs

how to identify a m22 rock crusher | it still runs

How to Identify a M22 Rock Crusher. Step 1. Check the casting number, the production year and the gear ratios on the aluminum serial number plate attached to the transmission box. Every ... Step 2. Step 3. Step 4.

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 …

the 1965 chevrolet m22 rockcrusher transmission: the

the 1965 chevrolet m22 rockcrusher transmission: the

Sep 15, 2010 · A Chevrolet Engineering Change Recommendation #68715 was issued on December 19, 1964, that proposed the changes required to change the M20-21 into the M22 rockcrusher transmission. This ECR is referred to several times through the 1965 Corvette A.I.M. (Assembly Instruction Manual) with the date stated on the A.I.M. sheets as April 23, 1965

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

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

Aug 08, 2018 · Gear ratio set (i.e., A=M20) (This code was added to identify ratios. Some early 1969 transmissions did not have this code. A=M20 B=M21, C=M22)

gto transmissions - andy's auto sport

gto transmissions - andy's auto sport

On October 21, 1968, another letter code was added to the plant prefix number to identify Muncie transmission ratios. Muncie 3 Speed: A=3.03:1 B=2.42:1 Muncie 4 Speed: A=2.52:1 Wide Range B=2.2:1 Close Range C=2.2:1 Rock Crusher. Beginning in 1968, the car's last eight numbers of the VIN were stamped on the transmission. As with all car productions there are exceptions to the rule

muncie four-speeds | hemmings

muncie four-speeds | hemmings

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 M21 four-speed

muncie 4-speed identification guide - chevy diy

muncie 4-speed identification guide - chevy diy

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). (The M does not stand for “Muncie.”) Typically, when you ordered a GM car you had standard options and accessories installed

chevy 4 speed rock crusher manual transmission codes

chevy 4 speed rock crusher manual transmission codes

chevy 4 speed rock crusher manual transmission codes. Warranty transmission note ct chevrolet, transmission, and serial number ppa m dated september , pec m dated may , transmission identification to muncie speed transmissions can be identified from later models by the way the transmission …

muncie 4-speed

muncie 4-speed

All wide ratio transmissions are designated M20 and close ratio transmissions are designated M21 or M22 depending on the gear set. From 1963 to 1965 the close ratio M21 was ordered under the M20 RPO code and the factory decided whether to install a wide ratio M20 or close ratio M21 depending on the rear axle ratio specified

chevy speed rock crusher manual transmission codes

chevy speed rock crusher manual transmission codes

M-22 “Rock Crusher” Identifi ion 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

magical muncie four-speed | hotrod hotline

magical muncie four-speed | hotrod hotline

A serial number is stamped on all Muncie transmission cases. The code has nine symbols that will reveal the GM division, year, model, assembly plant and car the transmission was used in. ... The M22 is called the Rock Crusher. “Dump the Rock Crusher,” hot rodders say. People think all Muncie four-speeds are Rock Crushers, but they’re not.

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