Feel free to upload pictures and ask questions. Some of the best Muncie builders participate on that page. Muncie RPO Codes . 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).
Identifying a Muncie 4-speed transmission can be crucial for both restoration projects and performance upgrades. Here's a simple guide to help you accurately identify your Muncie transmission, especially for Chevrolet vehicles. ... M22: Known as the "Rock Crusher", designed for high-torque applications.
STRONGEST Direct Replacement M22 With NEW Muncie AUTO GEAR Upgraded Ultra CASE With The Strongest M22w WIDE RATIO or Close Ratio Gears for a 4 SPEED TRANSMISSION. A GREAT HEAVY DUTY …
NEW DESIGN MUNCIE M22 ROCK CRUSHER CLOSE RATIO 4 SPEED. THIS IS THE M-22 TRANSMISSION THAT GM COULD NOT BUILD! Newly designed STATE-OF-THE-ART Muncie front case from "Auto Gear". This is by far the …
I've run 11.55 @118.85 in a 3350# 64 Chevelle with a2.52 first gear M-20, 4.88 rear w/ spool, 28 X9 Goodyear slicks and have only broken it 3 times in 3 years.
it also retains its numbers matching muncie m22 rock crusher 4-speed transmission and its original 12 bolt posi rear-end with factory 4.10 gears. car is finished in its code correct 52 garnet red paint with white rally stripes. also has its correct code 718 red interior - very rare color combo on this z28. has front power disc brakes, factory ...
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 …
GM's goal with the Muncie four-speed was to produce a better shift employing larger synchro cones. He tells us both the M20 wide-ratio and M21 close-ratio transmissions were first offered in 1963. The M22 Rock Crusher would come later to accommodate the heavy twist of Chevrolet's big-blocks in the mid-1960s.
70 chevelle, SS clone 454 4 speed 3.31 12 bolt posi 71 camaro. (owned since 1978!) 454-th400 3.07 12 bolt ... come guys, every gearhead knows every muncie is a rock crusher, every 327 came out of a corvette and all 12 bolts are posi's! I didn't even read this on the internet, 70% of the guys at the gas station tells me this when I'm gassing up ...
Muncie M22 4 Speed Transmission, rock crusher heavy duty with all new gears, close ratio 2.20 1st gear, remanufactured with attention to detail and expert assembly, the case was professionally cleaned and blueprinted to OEM specifications, 1" counter bore with proper leak free interference fit, new gears, synchronizers, bearing retainer, major overhaul kit, 10 spline input and 27 spline ...
For sale is a professionally built 1968 dated Muncie M22 4 speed with the driver side speedo tail found in GTOs, Chevelles, Impalas, earlier Corvettes, and other GM vehicles. 10 spline input, 27 spline output.
The M22 Rock Crusher is part of the Muncie 4-speed manual transmissions, which General Motors developed. The name is derived from the Muncie, Indiana, plant that manufactured the transmission.
By the time the Muncie was in its final phase of production (1971-1974) it also gained a 32 spline output shaft in place of the original 27 spline unit. Wide, Close, or Rock Crusher Initially there were two specific Muncie transmissions available: the M20 wide-ratio (2.56:1 first gear) and the M21 close-ratio (2.20:1 first gear).
To understand the evolution of the Muncie 4-speed you have to look at a series of engineering platforms that led to the final design of this transmission. The Muncie design has roots going back to 1935. I took the time to research the patent number that is cast into most Muncie main cases. It is U.S. Patent Number 3,088,336 (see Appendix).
The Muncie 4 Speed came in 3 basic models… the M-20, M-21 & M-22. The Muncie M20 was a wide-ratio transmission and was intended for basic street drive-ability and basically for cruising your car . The first models had a 2.56:1 …
""You can outfit an M20 or M21 with Rock Crusher type gears, OR actually make a 3 speed O/D out of a 4 speed case. Forth being the overdrive obviously.. Kinda nice if you want the Muncie look and an overdrive"" Actually the 3rd gear station becomes the OD and the 4th gear station becomes 3rd,so the shift pattern is a little d,1-2-4-3.
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, including the wide-ratio M20, the close ...
item 8 How to Rebuild Muncie 4-Speed Manual Transmission M20 M21 M22 Rock Crusher How to Rebuild Muncie 4-Speed Manual Transmission M20 M21 M22 Rock Crusher. $34.95 +$7.95 shipping. Best Selling in Service & Repair Manuals. Current slide {CURRENT_SLIDE} of {TOTAL_SLIDES}- Best Selling in Service & Repair Manuals ...
glenn on Auto Gear Upgraded Ultra Case M22Z Rock Crusher 4-speed. Perfect Performance with 2.73 to 3.42 Rear End Gears.
Recent Comments. Randall D Resler II on Auto Gear Upgraded Ultra Case M22Z Rock Crusher 4-speed. Perfect Performance with 2.73 to 3.42 Rear End Gears. Holiday SALE !!! Jeff Collins on Muncie Super Duty M23 Upgraded Ultra Case 4-speed Road or Drag Racing Rock-Crusher. Holiday SALE !!! Thomas N. on Muncie Super Duty M23 Upgraded Ultra Case 4-speed Road …
We are restoring a 72 Chevelle SS and would like to use a Muncie "Rock Crusher". Is there anyone out there that and tell me the difference between a Muncie M22W and a M22 Rock Crusher. ... As Tom stated, this is a great addition for the Muncie 4 speed AND my personal favorite gearset. Jody Haag 610-413-8015 Jody's Transmissions on Facebook ...
All said and done the cost is about the same if you have a 4 speed already. You can sell the Muncie to offset part of the Swap cost. 69 SS396 Cortez Silver(SOLD) 69 Pro Tour - LS3/T56 (SOLD) ... "It's got an M-22 Rock Crusher". If you swap it for a TKO-600 (The 600 stands for 600 lb-ft of torque capacity) then that claim is gone. I had a M-22 ...
How to Identify Muncie 4 Speed Transmissions. Identifying Muncie 4 Speeds III by Paul Cangialosi : The most popular question has to be that everyone thinks they have the famous "rockcrusher" M22 4 speed. This had the same gear ratios as the M21 but with a heavy duty gearset. The reason you may ask?
GM Muncie transmission rebuilt and guaranteed for 1 year. Correct fit for all 1967 - 1968 model Chevelles and Novas. This one will have the studs coming out from the side where your shifter linkage mounts. This is the Muncie M-22 Rockcrusher four speed. Designed for the highest performance models.
Lightened main shaft for less rotating mass. The M23 is the strongest Muncie style 4-speed available. Lead time 4-6 weeks. 20% Fee on Cancellation of order after 45 days. SPECIAL RUNS THIS WEEK. CALL JEFF (262)893-9812 for …
1967 - 1968 Muncie 4 Speed Transmission, M-22 Rockcrusher Complete original GM Muncie transmission rebuilt and guaranteed for 1 year. Correct fit for all 1967 - 1968 model Camaros. This one will have the studs coming out from the side …
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." ... The 1964-65 Muncie transmission main case casting number was #3851325. ... On this document the 4 speed transmission option code listed the transmission as an M20.
Muncie M22 Rock Crusher 4 Speed 2.20 Close Ratio Transmission Driver Side Speedo. Opens in a new window or tab. Remanufactured. $2,300.00. Buy It Now +$150.00 shipping. Sponsored. apollo_performance (1,285) . Muncie Close Ratio - M-22 Rock Crusher Four Speed Transmission - ALL NEW GEARS.
The fact is GM did infact use Rock Crushers in Vettes as early as 65 when ordered with a big block or special performance order package and in Pontiac F-bodies as early as 69 with special Ram Air performance packages. The Muncie 4-speed transmission was used with many different GM models and engine combinations from 1963 through 1974. The basic ...
This a BRAND NEW SUPERCASE M22 4-Speed Rockcrusher Style Transmission. Each new Auto Gear transmission is built from genuine Auto Gear parts, the highest quality available. This is a BEEFY version of the original Rock Crusher transmission.
NEW Upgraded Muncie M20 4 speed $2498.00. No Price NEW Muncie M22 SUPER ROCK CRUSHER 4 speed $2899.00. No Price Muncie Overhaul Kit. Complete overhaul kit for Muncie 4 speed transmissions. Must specify if your transmission has a 1" or 7/8" cluster shaft (pin) 7/8" kit comes with NON stepped synchronizer rings
1968-70 Muncie M22 Rock Crusher 4 Speed,new main case. Professional Built. Opens in a new window or tab. Brand New. $2,600.00. Buy It Now +$165.00 shipping. Sponsored. detail4speeds (1,368) . 1971 Camaro Z-28 M-21 Muncie 4 Speed Transmission Hurts Comp Plus NICE INSIDE. Opens in a new window or tab. Pre-Owned.
STRONGEST Direct Replacement M22 With NEW Muncie AUTO GEAR ULTRA CASE With The Strongest M22z ULTRAWIDE RATIO 4 SPEED TRANSMISSION. A GREAT HEAVY DUTY ROCKCRUSHER FOR YOUR …
We have the best prices on Muncie 4 speed parts, ... The M22 "Rock Crusher" followed four years later. It uses stronger components to handle big-block power. The original M20 was only offered for one year. It has the GM casting number "3831704" on the case. In 1964, the aluminum front bearing retainer was replaced with a cast-iron one ...
I started out with Pontiacs in the late '70s, and moved into Mopars because of chronic 4-speed transmission problems. I make no excuses about being a big A833 fan, and in my opinion the 18-spline hemi 4-speed is the strongest of the three. The Toploader would be a reasonbly close second, and the Muncie would be the last.
Recent Comments. Randall D Resler II on Auto Gear Upgraded Ultra Case M22Z Rock Crusher 4-speed. Perfect Performance with 2.73 to 3.42 Rear End Gears. Holiday SALE !!! Jeff Collins on Muncie Super Duty M23 Upgraded Ultra Case 4-speed Road or Drag Racing Rock-Crusher. Holiday SALE !!! Thomas N. on Muncie Super Duty M23 Upgraded Ultra Case 4-speed Road …
