The first time I heard the term "rock crusher" was in reference to the transmission in the 1967 L88 Corvette. Due to the low gear angle there is a fair amount of gear noise, really like a medium / heavy duty truck transmission. True enough the M22 did trickle out the door in 1965-67 and was buried in the option lists.
M22 is better, but not dramatically so. All have angle cut gears, the M22 has lesser angles to the gears than the M20/M21 gears is all. View this. The 764 extension housing …
from Southern Ok. ""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.. 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.
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 …
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 …
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.
When the engine was driving at low revs the transmission would rattle like it had gravel inside and would whine at high rpms. 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.
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Muncie transmission rebuilt and guaranteed for 1 year. Correct fit for all 1967 - 1968 model Firebirds. 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.
C1 & C2 Corvettes - M-22 vs. BW ST-10 - How does the Muncie M-22 rock-crusher trans compare to the Borg Warner Super T-10 Power Brute transmission (the ones with a nodular iron case and high nickel gears that were offered as over the counter replacements in the 70's and 80's?? Strength, durability, ease of...
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 where your shifter linkage mounts. This is the Muncie M-22 Rockcrusher four speed. Designed for the highest performance models.
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.
This Tech Tip is From the Full Book, MUNCIE 4-SPEED TRANSMISSIONS: HOW TO REBUILD AND MODIFY. For a comprehensive guide on this entire subject you can visit this link:
M-21 close ratio, and the extra heavy duty close ratio" M-22, also known as the "Rock Crusher". The M-22 was generally installed behind severely powerful (high torque) big-block engines.
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 …
as if you could actually put rocks in the transmission and crush them into gravel
New Super Heavy Duty Direct Replacement and Strongest M22's Made With Muncie Auto Gear Upgraded Ultra Case and Strongest M22 Close Ratio or Wide Ratio Gears. 10 OR 26 spline input and large 27 OR 32 spline output shaft. C355 Forged Aluminum Mid-Plate. Super Tail. AG Roller Side Cover. A…
"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 …
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 ROCKCRUSHER FOR YOUR CAMARO, NOVA, CHEVELLE, CORVETTE, GTO,442. THE MAIN CASE IS THE STRONGEST …
What makes the Rock Crusher so popular in street rods and drag cars? The M22 uses high-nickel-content-alloy straight-cut gears that have less of an angle than the M20 and M21 gears. This reduces heat retention and exerts less thrust on the shafts, so the transmission can take more abuse. This design creates the distinctive low-RPM rattle and high-RPM …
The M21 & M22 is a four speed, RWD or 4WD transmission. The M21 & M22 is a Muncie engineering design, this transmission is aluminum case, extension housing and side cover. The side cover has seven bolts and two shift cams. The synchro rings have 35 teeth and the unit has a 4 step cluster gear. The reverse gears are helical …
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 …
While the Chevy four-speed manual transmission was a staple in many muscle cars, even many of the General's "other" car models were equipped with a manually operated gear selecting device. However, finding one of these transmissions now at a swap meet or salvage yard is getting harder and harder. If you do happen to stumble …
Muncie Super Duty M23 Upgraded Ultra Case 4-speed Road or Drag Racing Rock-Crusher. SALE EXTENDED!!!
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 …
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 CAMARO, NOVA, CHEVELLE, CORVETTE, GTO,442. THE MAIN CASE IS THE STRONGEST MADE with fill and drain plugs. C355 …
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.
Therefore, the Muncie patent is basically a design for the layout of a 4-speed transmission. This "layout" is a 4-speed transmission with four forward gear ratios in the main case, a midplate bearing support, and a …
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 ...
The 1971 transmissions were the same as from previous year, except that the M-21 close-ratio 4-speed transmission was replaced with a stronger version of the Muncie close-ratio gearbox the famous M-22 "Rock Crusher" 4-speed.
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 …
GM Muncie 4-Speed Decoding. The Muncie 4-speed transmission was used with many different GM models and engine combinations from 1963 through 1974. The basic design and operation theory of the gearbox changed little during this period, however several design upgrades and modifications were made during the total production run.
Someone correct me if I'm wrong but I think the M22 rock crusher is a close ratio trans with straight cut gears vs. normal helical cut gears?
The M22 'Rock Crusher' featured a one-inch countershaft pin bore and shot-peened gears with aggressive helix angles that reduced heat and stress but also increased noise, leading to the nickname as the transmissions rattled their way down the road.
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 Saginaw 4-speed transmission was also used and shown for "M20 PROD V-8 ENG & R.P.O. L30". Easily identified by the reverse gear being on the main case instead of the tail housing. The proper Hurst …
This transmission will also fit all 57 thru 74 GM products and is a rare opportunity to own a virtually brand new infamous M-22 CLOSE Ratio Rock Crusher Transmission.
The M22 'Rock Crusher' featured a one-inch countershaft pin bore and shot-peened gears with aggressive helix angles that reduced heat and stress but also increased noise, …
If you are replacing a 27 spline Muncie M-20 or 21 your existing shifter will swap over. Mystery Muncie First Gear noise eliminated. This is about as close to a factory supplied transmission as you can get.
