GM Transmission Identification Guide: Chevrolet, Pontiac, Buick, …
Unfortunately, this makes transmission identification difficult to accomplish while the gearbox is installed in the vehicle. ... Muncie M22 "Rock Crusher" - Strengthened close ratio developed for high-torque applications, beginning with …
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MUNCIE M22 "ROCK CRUSHER"
This iconic transmission is based upon the infamous "ROCK CRUSHER" Transmission made famous in the 60`S AND 70`S by being installed in the L-88`S, BIG BLOCK 425 HP Factory Muscle Cars and HOT RODS of the past. The M22 has all new internal parts. All exterior parts are hand picked, visually inspected, painstakingly restored or replaced with ...
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How to Identify Your Muncie 4-Speed Transmission
Physical Characteristics: Inspect the transmission housing – differences can be spotted between the Muncie models based on the bolt patterns and overall design. Common Codes. M20: Wide ratio, mainly used in regular driving. M21: Close ratio, for high performance. M22: Known as the "Rock Crusher", designed for high-torque applications.
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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 …
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Muncie 4-speed
1964 to 1968 Muncie 4-speed transmissions can be identified from later models by the way the transmission arms attach. Early Muncie side covers had a stud and the shift arm attached with a nut on the stud while the 1969 and later …
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M22 Identification
This bumbed me out since I had previously read that this was an indication that it was a Saginaw not a Muncie. It does have a 7 bolt side cover. Doe this mean it's still an M22 but just manufactured at the Saginaw assembly plant or it's not an M22 "Rock Crusher Transmission". I am just learning !
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How to Identify a M22 Rock Crusher
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.
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Brand New SUPERCASE M22 4-Speed Muncie Rockcrusher Style Transmission
This a BRAND NEW SUPERCASE M22 Muncie Rockcrusher Style Transmission. This is a BEEFY version of the original Rock Crusher transmission. Most all the weak points of an original Muncie have been solved by the Super-Case design. The Supercase has extra casting in all the known weak areas. The mid plate is aircraft grade aluminum.
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The 1965 Chevrolet M22 Rockcrusher Transmission: The Mystical Transmission
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.
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M-22 "rock crusher"
He mentioned he had a M22 rock crusher in his car, and how rare it was because only a few of the M22's were "Rock Crushers". I am by far an expert, but I have never heard of this before. ... If the transmission is in the car, and there is NOT a part number tag attached to one of the side cover bolts, NO, there is no way to tell if it is an M20 ...
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Firebird Central | 1967
1967 - 1981 Pontiac Four Speed Transmission Clutch Bell Housing Kit Brand new manual transmission bell housing kit for your Pontiac. This set includes a brand new exact bell housing, lower inspection plate cover panel, clutch fork rubber boot, clutch fork ball stud, correct bell housing to engine block mounting bolts. All pieces are brand new ...
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The Muncie 4 Speed Transmission Taught A …
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 …
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M22 4 speed rock crusher
Put the transmission in 2nd gear and remove the side cover to view the helix angle of the gears and the condition of the synchro engagement teeth. ... " 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 ...
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Technical
I have some other numbers i will include in the pictures. From what i have looked up i believe its a 66-67 m21 but id like if anyone has any input to what it is for sure. Thank you for any input. I paid 300 bucks for this transmission a couple years ago and plan to replace a blown up saginaw 4 speed in my car.
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Chevy Manual Transmission Identification
Further Muncie identification 3 Muncie 4 speeds were offered. The M-20 wide ratio, the 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. The M-22 is distinguished from an M-21 by the angle of the gear teeth.
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How To Identify Chevy Four-Speed Transmissions
By comparing these M22 transmission assemblies to Chevrolet's 1965 transmission identification codes, I found a perfect match. This transmission identification code …
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Rock Crusher identity
The only way to be sure is to pull the side cover and check the gear angle like the others have stated. Depending on the year of the transmission there are some things to look for, but as vince stated if the parts …
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American Chevy Muncie – M20, M21, M22 | Allstate Gear
However, the Rock Crusher was only equipped in cars that had high-performance big blocks, including the Corvette, Camaro, Firebird and Chevelle. Thanks to the similarities between the M20, M21 and M22 transmissions, you can use a combination of Muncie 4-speed transmission parts to build the transmission you want for your project car.
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M-22 Rock Crusher Four Speed Transmission
Muncie M-22 Rock Crusher Four Speed Transmission - RARE Drivers Side Speedo (#1) See all feedback. Product ratings and reviews. Learn more. 4.8. 11 product ratings. 5. 10 users rated this 5 out of 5 stars. 10. 4. …
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Muncie I.D. chart | Chevy Tri Five Forum
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.
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Muncie 4 Speed Transmissions
It was primarily designed as a road race transmission. The straighter angle of the gearset produced less heat and less end loading of the gear train. Combined with high impact alloy gears this 4 speed really pushed the limits of it's aluminum …
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M22-Wide vs M22 "Rock Crusher"
In the beginning, the M-22 was the Heavy Duty Muncie, and it was available ONLY in the close ratio version (2.20:1 first gear ratio). The primary difference between the regular close ratio Muncie (M-21) and the HD Muncie was the angle at which the gear teeth were cut.
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How to Identify a Muncie Four Speed
A:Zack, I am excited that you and your father are working on a project car together.This is what makes the car hobby so great. The Muncie four-speed transmission was used with many different ...
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Muncie 4 speed....M21, M22, Rock Crusher? | The H.A.M.B.
That's where the 'whine' come's from with those transmission's.. Also, there's companies out there that are making new gear set's for Muncie's as well..not just stock replacement stuff either. 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..
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Muncie 4-speed Transmissions | The Online Automotive
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 highly sought-after for performance applications. The term "rock crusher" refers to the noise made by the meshing of the stronger helical gears in the ...
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Muncie four-speeds | The Online Automotive …
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 …
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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 ( …
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Transmission identification
Transmission identification. Jump to Latest ... My book says it is a M-22 Rock Crusher with 2.20 first gear and if it has Side Cover part # 3950306 it is a 69 and if it says 3884685 it is a 68. Sounds like a good piece of hardware and a rare one. Original 138 car from Freemont. 67 SS Bench seat 4-speed car with 396, Original M-20 with factory 3 ...
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