Muncie 4 Speed Transmissions
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. ... Top countergear is an M22. Lower gear is an M20. Notice the ...
muncie transmission info | Grumpys Performance Garage
The M22 transmission has a 20 degree helix angle on the gear set as opposed to a 45 degree angle found on the M20 and M21 and were made with a higher nickel alloy. The straighter angle was designed to produce less end loading of the gear train and less heat but created more noise, thus the nickname "Rock Crusher" was born.
Why is the Muncie M22 called the rock crusher?
In the 1970s, virtually all Muncie four-speeds had 26-spline input shafts. 8. The M22 Rock Crusher 26-spline input shaft sports a wider gear for greater torque capacity. How much oil does a m20b25 take? ... The M20 and M21 transmissions produced from 1963-'74 are easy to identify in both wide- and close-ratio units. The M22 to come later in ...
Muncie four-speeds | The Online Automotive Marketplace
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 M21 four-speed.
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.
M22 or M21 what's the diff?
Yes, the M22 is a whiner because of the different angle that the teeth are cut and they are considered stronger. The difference in a M22 is: input shaft, 1st, 2nd, 3rd, cluster and the reverse idler gears. EVERYTHING ELSE is the same and interchangeable. If you had a numbers matching 66 SS with a M20 and wanted a Rockcrusher, just buy these ...
Muncie 4-speed Transmissions | The Online Automotive
The easiest way to identify a Muncie transmission is by its side cover. Muncies have seven bolts, two bolts on the bottom, three on the top and one down each side. ... 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 ...
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.
Muncie I.D. chart | Chevy Tri Five Forum
M22 transmissions can only be identified removing the selector cover(side cover) and visually identifying the straight cut gears-all other muncie transmissions had conical cut(angle) gears. The most well known Muncie …
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.
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 informed decisions about any potential restorations or modifications. Feel free to share your findings or ask if you have questions about specific codes you encounter!
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$.
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.
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 ...
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.
When was the M22 first called "rock crusher"?
The M22 was "closer" to straight-cut, so it was noisier ( not saying it was close to straight-cut, just closer than the M21). Not only did the reduced angle of the M22 make for thicker gear teeth, which are stronger, but the reduced angle on the teeth also reduced the thrust forces on the case during both acceleration and deceleration...
Muncie 4-speed
The M22 was produced in 1973 and 1974 for other GM divisions. ... thus the nickname "Rock Crusher" was born. Another misconception is if you have a drain plug you have a M22. ... Transmission Identification. 1964 to 1968 Muncie 4-speed transmissions can be identified from later models by the way the transmission arms attach. Early Muncie side ...
Muncie 4-speed Transmissions
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 strong-er helical gears in the M22.
Muncie 4 Speeds
Personally, I think the angles vary from gear to gear. 1st gear on an M22 may be 19 degrees, 3rd may be 20 degrees. Also M22 gear sets were of a higher nickel alloy. The straighter angle was designed to produce less end loading of the gear train and less heat but created more noise, thus the nickname "rock crusher".
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
Muncie 4 Speed Transmissions
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.
Muncie 4-Speed Identification Guide
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Videos of How To Identify A M22 Rock Crusher
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Technical
Bought a supposedly rebuilt M21 off of Craigslist for $500 from a sketchy guy...of course no paperwork to prove the rebuild, so you know it hasn't been done. Took it to my transmission guy to check it out and, yep, no rebuild. …
Muncie 4-Speed: The Complete History
Notice how the angle of the M22 gears is much straighter than on the ST10. The noise level increased because of this angle, giving the M22 the nickname "RockCrusher." ... Today's VINs (vehicle identification numbers) are even bar coded. A service technician can use a scanner to find a VIN, and any known service issues are easily found.
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 …
Is this a real M22 Rock Crusher?
Take a look at the gears, an M22 should be more of a straight edege. I know Muncie had rings etched on the input shaft to denote which of the three it was but can't remember what years they stopped doing this. I do no the M22 had no rings on its shaft in that year span, an M20 had 2 and M21 had one.
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 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 M22 Rock Crusher 4 speed
I do not claim to be a transmission expert and could be wrong but the "real" rock crushers had straight cut gears....not helical cut gears. I believe they were first released by GM in 1969 or 1970. I had one in my 1970 Chevelle SS 454-450HP LS6 car. I bought it new. The Rock Crusher was very noisy due to the straight cut gears.
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 ...