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how to identify an m22 rock crusher transmission. You can identify the various M20 M21 and M22 transmissions by the input shaft. of the M22 created a problem with noise (hence the name "rock-crusher"). Get Price Muncie Transmission Id and ratio guideD and L Transmissions. Chat Online; Muncie Identification The H.A.M.B.
Jul 09, 1999· The M22 is the "rockcrusher" tranny. It's a bit more heavy duty than the M21 and much rarer. It's called a rockcrusher due to it straighter cut gears which whine ( and are stronger ). The M21 is a standard Muncie 4 speed. They both have the same ratios beginning with a 2.20 1st.
Ratios of the M20, M21, M22. Muncie 4-speeds were produced in two different ratios wide-ratio (M-20) and close-ratio (M-21). An extra heavy duty close-ratio version (M-22) was also offered on many of the big-block high-performance models.The choice of transmission was …
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 ...
The early manufacturing Muncie four-speed case is the small-bore unit and could be recognized by the GM casting quantity 3831704 (see Muncie M20/M21/M22 Important Case Identification chart). The massive-bore Muncie got here into manufacturing in 1964-'65 and turned the usual from then on by means of the top of manufacturing in 1974.
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 plug on the right side of the main case and from 1969 to 74 had a "C" designation at the end of the assembly date code. ... M21 and M22 4 speed whether it is ...
Muncie M21 M22 Manual transmission parts, overhaul kits Buick ... We have include information on how to identify individual transmissions, ... ratio, and the extra heavy duty close ratio" M-22, also known as the "Rock Crusher". Get Price
Muncie M21 / M22 4 Speed (RWD) Manual Transmission Parts These quality M21 and M22's manual transmission parts, rebuild and overhaul kits are designed to be top of the line overhaul kits. We have include information on how to identify individual transmissions, application information, model year, detailed kit and part availability by ...
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.
Oct 01, 2008· The difference is that the M22 has straighter cut teeth on the gears while the M21 has more angle to the gears. There should also be a code stamped on the outside of the tranny that indicates which one it originally was. This code will not necessarily be correct anymore because someone could have changed the internals.
Feb 21, 2010· MODEL IDENTIFICATION(1969-1972) A-M20 B-M21 C-M22 Note: not always stamped Originally, identifying the transmissions by external markings was simple. The M20(wide ratio) trans. had two grooves cut into the 10-spline input shaft and no fill plug in the case, while the M21(close ratio) had a single groove on the 10-spline input shaft and no fill ...
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 ...
Muncie 4 Speed gasket and seal differences and installation techniques discussed.Get the Gaskets HERE: #1 BOOK ON MUNCIES IS:
Muncie 4-speeds have varying helix angles in the gearsets. Typically, the M20/M21 gearsets have a first-gear helix angle of 26.4 degrees and an input shaft angle of 39 degrees. The reduction in the angle with the M22 is quite substantial. The M22 first gear has an angle of …
The next two digits are the day of the month, the 23rd, while the "B" in the last positions designates the Muncie M21, with "A" for the M20 and "C" for the M22. Identify Muncie 1963 to 1967 transmissions. These Muncies have the same serial number format, minus the gear ratio designation, so a spline and gear tooth count must be done. ...
Dec 22, 2016· Hero Member. Posts: 1694. Re: Muncie metal trim tag identification. « Reply #21 on: December 09, 2016, 03:15:34 PM ». To answer the above question (s), yes, there are repros; good ones, too. The following link will get you to the retailer - their '68 tag is the wrong number, but they have all of the '69 part numbers.
muncie 4-speed identification guide- chevy diy. 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.
Jul 16, 2018· M20 gets you a 2.52 1st gear compared to the 2.20 1st in the M21 (and M22) close-ratio box. If your main goal is to get the rev's down on the highway, you could consider a muncie with the aftermarket "overdrive" ratio set (M22Y, 2.20, 1.51, 1.00, 0.859). This would be a little soft around town with a 7.8 overall 1st gear, but the 0.86 overdrive ...
Identify your Buick's manual transmission. Muncie M20/M21/M22 four-speed rear-wheel-drive transmissions have a seven-bolt side cover where the shifting linkage connects to the transmission. The Muncie M22 is a larger model, typically installed with high-torque, big-block engines.
MUNCIE TRANS INDENTIFICATION. Case casting numbers, relating production years and ratios available. Casting: 3831704 Years: 1963 Only Ratios: M20 2.56 1st, M21 2.20 1st Casting: 3851325 Years: 1964 - 1965 Ratios: M20 2.56 1st, M21 2.20 1st Casting: 3885010 Years: 1965 - 1967 Ratios: M20 2.52 1st, M21 2.20 1st, M22 2.20 1st
Sep 15, 2010· The 1965 M22 maintained the 10-spline input and 27-spline output as all other Muncie transmissions from that model year.The 1965 M22 also had the drain plug boss drilled and tapped for a magnetic drain plug. This was not done on the M20 or M21 transmissions. Driver's side of restored 1965 M22 transmission.
Type Codes: A ~ M20, B ~ M21, C ~ M22 1964. Here is an example from a 1964 Chevelle from Fremont, CA. Note the H103065 stamped on the flange and the date is shown by the P1030 stamping in the upper right of this photo. The VIN derivative stamping positively identifies this as a 1964 Fremont Chevelle because the letter "H" was only used in 1964 for Fremont.
This is a video on how to evaluate a Muncie Transmission for rebuild with lots of good information on identifying the transmission and issues they might have...
Nov 02, 2007· All muncies used the same bellhousing bolt pattern and bolt size, the length, and the same transmission mount. A muncie and it's bellhousing are the same length as either a powerglide or a T350, and will directly bolt in. Many but not all muncies were "coded" (M20, M21, M22) by grooves cut into the input shaft, none, 1, or 2, though which is ...
Muncie Transmission Identification. The Muncie 4-speed transmission was used with many different GM models and engine combinations from 1963-1974. The basic design and operation theory of the gearbox changed little during that time, though several design upgrades and modifications were made during the total production run.
Times and requirements have changed making both the M21 and M22 the closest ratio production 4 speeds ever produced but also not practical for today's driving habits unless road racing is your thing. The new Muncies being built today have some better ratios.Today's examples of the new car gear set ups are Mustang GT's with a 3.35 1st gear and 3 ...
Muncie M20 or M21 w/ Autogear Super Case - Tail & Iron Mid Plate - Brand New Top To Bottom 10/27 or 26/32 Spline Count : $1,900.00: Muncie M22 w/ Super Case & Iron Mid Plate - Brand New Top To Bottom - 10/27 or 26/32 Spline Count : $2,150.00: Tremec TKO 500, 5 …
muncie m21 to m22 transmission gear conversion kit 6-piece with 26t 10-spline close-ratio input fits '63-'74 Rating Required Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best)