The 1965 Chevrolet M22 Rockcrusher …

By comparing these M22 transmission assemblies to Chevrolet's 1965 transmission identification codes, I found a perfect match. This transmission identification code list was issued by the Chevrolet Facilities and Product …

The 1965 Chevrolet M22 Rockcrusher …

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 …

GM Muncie 4-Speed Decoding

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.

Auto Gear Upgraded Ultra Case M22Z Rock Crusher 4 …

Garry Brown on Super Pro Road/Race Muncie Upgraded Ultra Case M22 Rock-Crusher. SALE EXTENDED!!! Michael wilhelm on Auto Gear Upgraded Ultra Case M22Z Rock Crusher 4-speed. Perfect Performance with 2.73 to 3.42 Rear End Gears. SALE EXTENDED!!! Ricky Fitts on Muncie Super Duty M23 Upgraded Ultra Case 4-speed Road or Drag Racing Rock-Crusher ...

NEW Muncie M22 SUPER ROCK CRUSHER 4 speed …

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 Transmissions. Muncie-Tremec-Saginaw-TKO-Top Loader-Richmond. Home: View Cart: Muncie Kits & Parts: T56: T56 Corvette GTO CTSV: TR6060 / T56 Magnum: T10: Super T10: TKX: T5:

M-22 "rock crusher"

I explain this in detail, because like so many BS stories that have occurred over the years, the M22//Rock Crusher is one of them that continues to be perpetuated by "armchair" experts. Originally, the M22 was ONLY a close ratio. But now, there are several aftermarket ratios available for converting an M20 or M21 into a wide ratio M22 for ...

Muncie 4-speed Transmissions | The Online Automotive

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 is stronger than the early 27-spline, and the newer units seem to perform better in high-rpm and high-horsepower ...

New Auto Gear Upgraded Ultra Case Muncie HD …

John DiLauro on Auto Gear Upgraded Ultra Case M22Z Rock Crusher 4-speed. Perfect Performance with 2.73 to 3.42 Rear End Gears. SALE EXTENDED!!! Garry Brown on Super Pro Road/Race Muncie Upgraded Ultra Case M22 …

The Story of the Mighty & Majestic Muncie 4 …

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 …

Technical

Technical Muncie 4 speed identification. Discussion in 'The Hokey Ass Message Board' started by ... M-22 Rock Crushers have gone up boocoo bucks since then.. ... it to my transmission guy to check it out and, …

Muncie 4 speed....M21, M22, Rock Crusher? | The H.A.M.B.

I currently have an M22 Rock crusher in my '56 Chevy pickup, and have another M22 that was rebuilt about 6 years ago by my father but never used. I also have what I believe is an M21, but I'm not certain. ... Go to it and click on "identification" and that page will tell you everything you need to know about muncie transmissions. You will be ...

How to Identify a Muncie 4 speed

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 Muncies at Click the link for Muncie 4 speeds and you'll find everything you ever wanted to know. They also sell good rebuild kits and each kit is specialized for the …

Help Identify Muncie M20, M21 or M22

An M22 gearbox has a 20 degree helix angle on the gearset as opposed to a 45 degree angle. Also M22 gear sets were of a higher nickel alloy. ... The original post said "without pulling it from the vehicle" Thus the request for any/all numbers on the trans to Help identify it. After 35 yrs, anything could have happened to these tranys.

Guide to Muncie M20, M21, and M22 Four-Speed …

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 …

Muncie Calendar Date Codes — D.M.E. Transmissions

1969-1974 codes include a suffix letter at the end to aid in identification of transmission ratios. A = 2.52 1st gear wide ratio M20, B=2.20 1st gear close ratio M21, C = 2.20 first gear Rock Crusher M22. One example code would be ( P0E21 A ) which reads: Muncie four speed aluminum for passenger car, 1970, May, 21st, ratio M20.

The Muncie 4 Speed Transmission Taught A Generation Of …

To do so, it needed an even tougher gearbox than the M21, and while the Grand Sport never made it to Le Mans due to GM politics removing its brands from motorsports competition, the Bowtie brand was able to test the Muncie enough to develop a newer version that eventually hit the streets as the M22. The M22 'Rock Crusher' featured a one-inch ...

Muncie four-speeds | The Online Automotive Marketplace

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 ...

How to Rebuild a Muncie Four-Speed Transmission

The Muncie four-speed is as legendary as the cars that it was put into, with the M20, M21, and Rock Crusher M22 models all part of the hot rod vernacular. From the OEM factories to racetracks to ...

Muncie 4 Speed Transmissions

Many people are always calling me or asking me at shows on how to identify Muncie 4 speeds. Not too many people actually know what type Muncie they have and most publications have done a fantastic job of giving out wrong information. ... M20 2.52 1st, M21 2.20 1st, M22 2.20 1st Casting: 3925660 Years: 1968 - 1970 Ratios: M20 2.52 1st, M21 2. ...

How to Identify Your Muncie 4-Speed Transmission

M22: Known as the "Rock Crusher", designed for high-torque applications. Using these tips, you can confirm whether you have the right transmission for your Chevy and make …

NEW Auto Gear Upgraded Ultra Case Muncie HD M22 4-Speed Rock-Crusher

John DiLauro on Auto Gear Upgraded Ultra Case M22Z Rock Crusher 4-speed. Perfect Performance with 2.73 to 3.42 Rear End Gears. SALE EXTENDED!!! Garry Brown on Super Pro Road/Race Muncie Upgraded Ultra Case M22 Rock-Crusher. SALE EXTENDED!!! Michael wilhelm on Auto Gear Upgraded Ultra Case M22Z Rock Crusher 4-speed. Perfect …

1969

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 the Muncie M-22 Rockcrusher four speed.

How to Identify a M22 Rock Crusher | Cars DIY

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. Promoted by Check the casting number, the production year and the gear ratios on the …

GENERAL MOTORS MUNCIE 4-SPEED MANUAL …

L30-s36T: except M22 3831746 WT297-21 L30-s36T: M22 'Rock Crusher' 3879999 WT297-21A A17 Mainshaft 3rd Gear L27-s36T: except M22 3831747 WT297-11 L27-s36T: M22 'Rock Crusher' 3880845 WT297-11A A18 Mainshaft 3rd/4th Synchronizer Assy synchro rings w/o support shoulder (1963-65) 3887887 3887887

How to Identify a Muncie Four Speed

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.

How to Build a Bulletproof Muncie M22 Four …

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.

Muncie I.D. chart | Chevy Tri Five Forum

C-M22 MODEL IDENTIFICATION(1969-1972) A-M20 B-M21 C-M22 ... 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 ...

Muncie 4-Speed Identification Guide

M22 4 speed rock crusher

I have a 1970 m22 close ratio 4 speed from a 1970 ls6 I owned back I the 80s. Here is the info. ... Spending" 3000$ on a bolt on, period correct, grin inducing almighty and mythical transmission that is the great Muncie M22 Rock Crusher makes more sense for many compared to buying a retrofit kitted TKX for 5 000$.

M22 Rock Crusher

C3 General - M22 Rock Crusher - Just bought a 1968 (originally was 427/435..currently has a CE replacement block from 69)) and I believe it has a M22 vice M21. Intent at some point in the near future is to crawl under and check numbers/code. I know it has the factory 411 rear end (Code FB) so that is the first reason...