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m21 rock crusher identification

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

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

The M22 Rock Crusher would come later to accommodate the heavy twist of Chevrolet’s big-blocks within the mid-1960s. The M20 and M21 transmissions produced from 1963-’74 are straightforward to determine in each wide- and close-ratio models. The M22 to come later in 1967-’74 can also be a close-ratio unit, however a lot stronger than the

muncie 4 speed transmissions

muncie 4 speed transmissions

The dead 2.20 first gear ratio which is the same in the M21 is not that good for off the line acceleration. You would need at least a 4.56 rear end gear to compensate for the dead first gear. That was OK when gas was cheap in 1967 and you did not mind pulling 3000 RPM at 50 MPH while going to work

how to identify a muncie four speed: build date codes

how to identify a muncie four speed: build date codes

Jul 29, 2016 · Last time we talked about how to distinguish a Muncie four-speed transmission from a Saginaw or BorgWarner and the different types of Muncie transmissions, …

how to identify a m22 rock crusher | it still runs

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 car. If you have the incorrect transmission, your car may not function properly. You can identify several unique signs that identify an

muncie four-speeds | hemmings

muncie four-speeds | hemmings

The M20 and M21 cluster gears are cut at a 45-degree angle. The reduced gear angle of the M22 created a problem with noise (hence the name "rock-crusher"). Performance seekers decided to live with the noise when the benefits of increased durability from the gear-tooth angle outweighed the gravelly clatter

muncie 4-speed identification guide - chevy diy

muncie 4-speed identification guide - chevy diy

The 1969–1974 Muncies received a ratio designator at the end of the serial number: “A” for M20, “B” for M21, “C” for M22. An example is P2D23B. This is April 23, 1972, M21 ratio. It’s also not uncommon to see double stamps or sometimes even double letters at the end

m22 rock crusher

m22 rock crusher

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. ... (yoke). For identification purposes all GM M22s have seven bolts attaching the Side Cover (inspection plate), no lines or rings on the Input Splines, have a drain plug in addition to the fill

muncie identification | the

muncie identification | the

Feb 21, 2010 · 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

muncie 4-speed

muncie 4-speed

The M20 and M21 have the same cut to the gears, the M22 is a straighter cut resulting in a greater strength. ... thus the nickname "Rock Crusher" was born. Another misconception is if you have a drain plug you have a M22. ... Transmission Identification. 1964 to 1968 Muncie 4-speed transmissions can be identified from later models by the way

muncie 4-speed transmissions | hemmings

muncie 4-speed transmissions | hemmings

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. These M22 units are

how can i identify a rock crusher transmission

how can i identify a rock crusher transmission

how to identify m21 rock crusher 4 speed Rock Crusher Mill ... how to identify m21 rock crusher 4 speed ... Muncie 4 Speed Transmissions. ... About muncie rock crusher identification-related information:submit corrections and additions to this information to the …

muncie 4 speed

muncie 4 speed

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

magical muncie four-speed | hotrod hotline

magical muncie four-speed | hotrod hotline

The downside is that it tends to make noise. It will rattle at low rpms and whine at higher rpms. 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. Nowadays there are custom gear ratios and set ups, including M21 wide-ratio and M22 wide

converting to a m22 rock crusher | team camaro tech

converting to a m22 rock crusher | team camaro tech

Jul 15, 2013 · I have 67 Camaro with a factory M20 4-speed. The synchronizers are going bad and its time to replace the trans. The engine has been freshly built and pushing 450-500HP I am looking at either a Keisler 5-speed or the legendary M22 Rock Crusher from Midwest Muncie. Can anybody tell me if …

the 1965 chevrolet m22 rockcrusher transmission: the

the 1965 chevrolet m22 rockcrusher transmission: the

Sep 15, 2010 · 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

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

muncie decoding?

muncie decoding?

Nov 23, 2014 · Apr 14, 1999. Location: Bismarck, North Dakota. All 3 models of Muncie were used yet in early 1973. Part way through the production year, the supply ran out and after that, Borg Warners were used. If you have a 1973 Muncie, it could be a M20, M21, or M22. The numbers stamped on it would tell you what it was originally

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