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I'm trying to determine at what point the M22 was first called "rock crusher" and who coined the term? I know the M22 first came out in 1965 and its popularity really picked up around 1968. I have a suspicion that rock crusher may have first been used in a late-1960s auto magazine test drive, but was hoping the historians in this group might be ...
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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.
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The straighter angle was designed to produce less end loading of the gear train and less heat but created more noise, thus the nickname "rockcrusher". The higher nickel alloy allowed for more …
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I am changing out my 700r4 to a muncie 22 rock crusher I have a few questions: i just bought a 72 chevelle ss clone The system is a chevy 383 stroker and 700r4 is the drive shaft i am using now will the drive shaft have to be cut or lengthened if so by how much for the 383 stroker and m22 rock crusher can i use the 700 r 4 yoke i thing not
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The M22 Rock Crusher was no longer available as an option. And, eventually, the Muncies were replaced by BorgWarners in 1974. There were usually two "broadcast code" letters added to the end ...
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You can identify several unique signs that identify an M-22 "Rock Crusher," even if it does not have a GM hallmark imprinted on its surface. Step 1 Check the casting number, the production …
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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 ...
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need help identifying this Transmission, body # 3925661,tail shaft 3978764,, P1B01C. ... 1971 and a ratio of C for M-22 2:20 ratio Rock crusher, however these gears are not Rock crusher and must have been changed, they appear to be M-21 gears 2:20 ratio The tailhousing is a 774 which is the large housing that takes the 400 turbo yoke ...
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The Muncie four-speed was produced in two ratios: the wide ratio (M20) and the close-ratio (M21). That being said, there was a second, close-ratio version (M22) that was developed to survive duty behind engines with a higher torque output, and was known as the "Rock Crusher."
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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 Forged Aluminum Mid …
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1972 Muncie M22 Rock Crusher 4 Speed Counter Transmission ORIGINAL C CODE NO VIN. Opens in a new window or tab. Remanufactured. $3,195.00. Buy It Now +$150.00 delivery. Sponsored. byorcell (3,296) . Muncie M22 4 Speed Transmission Close Ratio With New Rock Crusher Gears RESTORED. Opens in a new window or tab. Remanufactured.
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C1 & C2 Corvettes - M-22 Rock Crusher - I am putting a 383 stroker in my 66 Coupe. I have a 3:55 rear end in the car and it has been suggested that I replace my transmission (which I was going to do anyway) with a M-22 rock crusher. ... Not that I think you need one, I have a completely rebuilt m22 all GM gears and hust shifter for sale. Reply ...
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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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C-M22 MODEL IDENTIFICATION(1969-1972) A-M20 B-M21 C-M22 ... 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 ...
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Information Exchange. Bench Racing. M-22 "rock crusher"
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Without removing the sidecover you can look at the input shaft and check for identification grooves cut into the spline. How many spline is a Muncie 4 Speed? 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.
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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). (The M does not …
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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 straighter angle was …
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The 764 extension housing indicates the transmission has a 32 spline output which all 71 through 74 M20, M21, and M22 Muncies and the 1970 M22 had. A M20 with the 32 spline output and 26 spline input is a desireable Muncie as it was stronger than earlier Muncie M20s.
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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 ...
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I became aware of the nickname, likely a motorhead created comparison of the rugged transmission to rock quarry equipment, when, in late '68, a buddy traded a whipped '66 SS396 for a disaster of a 1962 Corvette with a 1965 396/425 engine and an M22 transmission, 4;56 ratio '62 style rear end, unbelievably cobbled shifter, cooling system and ...
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M22 Rock Crusher. Jump to Latest 2.6K views 6 replies 4 participants last post by DZAUTO Nov 11, 1999. C. catman Discussion starter. 5 posts · Joined 1999 Add to quote; Only show this user #1 · Nov 9, 1999. A friend of mine is restoring his 70 SS Camero and found a M22 rock crusher cheap,, it needs work but I have seen certain M22's going for ...
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M22: Known as the "Rock Crusher," this model is a close-ratio transmission, making it slightly more aggressive, providing better performance at higher speeds. 2. Gear Ratios. M20 Gear Ratios: Typically has a 2.52:1 first gear ratio. M22 Gear Ratios: Generally features a 2.20:1 first gear ratio, which is more suited for performance. 3. Noise ...
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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.
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People think the "Rock Crusher" is special or stronger than a standard wide box Muncie. It is special in terms of price but it isn't any stronger. The "Rock Crusher" was built for road racing, with the angle of the gears straightened out to prevent excessive wear in the front bearings due to the forward thrust component of the force vectors ...
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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?
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Muncie 4 speed....M21, M22, Rock Crusher? Discussion in 'The Hokey Ass Message Board' started by Buzznut, Jun 26, 2008. Page 1 of 2 1 2 Next > Joined: May 9, 2008 Posts: 2,349. Profile Page ... Go to it and click on …
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M22-Wide vs M22 "Rock Crusher" ... 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. I have tired to look online but not finding anything to help. I would appreciate it.
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You can buy M22 internals and retrofit a M20/M21 case. If you want a stronger transmission, there are Super T10 and some aftermarket transmissions that are even stronger. …
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