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? 1967 Chevelle ... this is a great addition for the Muncie 4 speed AND my personal favorite gearset. ... The M21 was mostly used by GM on 3.70 & numerically higher ratio rear axles, the M20 on 3.55 & lower ...
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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.
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The new generation Muncie M22 with all the bells and whistles would probably work pretty good with a clutch that slipped a little. 2002 Jerry Bickle Cavalier, 446" Small Block, Brodix Canted Valve, lenco 5 speed, 7.54 @ 180. mph,1.06 60', 2235 lbs for 2014.
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1969 - 1973 Muncie Four Speed Transmission M-22 Rockcrusher 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 …
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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 "BEST" replacement aluminum case ever built for a …
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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 …
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The 2.20:1 ratio first gear is usually referred to as the Muncie M21 transmission; based on GM's production codes. The 2.56:1 ratio is referred to as the M20. 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 ...
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4-SPEED MANUAL TRANSMISSION ASSEMBLIES, GEARS & PARTS APPLICATIONS: GENERAL MOTORS ... M22 'Rock Crusher' (1964-74) 3924796 WT297-12B NOTE: these TWO (2) gears w/o snapring counterbore on cone end: used w/o thrust washer. ... cases appear to be identical except for alloy. GM used them optionally in 1968-69. NOTE: these THREE (3) cases …
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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 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 …
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How much HP will a Muncie 4 speed hold. How do you distinguish between an M21 and an M22. ... M-37 "Super Muncie" or "rock crusher" Several ratios available, large input shaft (1 1/4, like "Hemi" 4-speed and "big" Top Loader), spur-cut 1st gear (increased load "shock" capability, makes a horrid "whine", thus the nickname) and large output shaft ...
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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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Because someone will ask, I used to make 2.72 and 2.96 custom ratio Muncie transmissions for use with 277 to 310 CID small block engines. You should be able to figure the torques for the M20/M21 ratios from the 2.96 test data.
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This is a perfect direct replacement 4-speed for any 63-70 GM 4-speed car with some real HP. Lead time 4-6 weeks. 20% Cancelation Fee on special order.
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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 …
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Chevy Transmissions: Muncie M22 "Rock Crusher 4 Speeds were made From 1965 TO 1974: The most popular transmission of it's time for high performance cars built for Chevrolet and all …
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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 …
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From 1963 thru 1975 hundred's of thousands of Muncie four speed transmissions were manufactured and placed in a broad range of GM cars. Never in all that time was a Muncie transmission with an ultra-steep gearset ever manufactured. The new Muncie M-22Z four speed over drive transmission has been in the market place about two years now.
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The next piece of documentation was the factory car order which was sent to Gorries Chevrolet to state how the car was to be built and that it was now awaiting production. On this document the 4 speed transmission option code listed the transmission as an M20. In 1965, all 4 speeds were ordered initially by the M20 4 speed designation.
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I am building a decent horsepower Poncho 400. I am researching transmissions and located a couple that I would like. Found the old Muncie "Rock Crusher", and read up about it. Found a Mopar A833, and read up on it. I want to keep a 4-speed so that puts out the T56 plus I heard that Tremec will melt with that much torque...
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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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The Gear Box Transmissions. Muncie-Tremec-Saginaw-TKO-Top Loader-Richmond. Home: View Cart: ... Muncie Parts > NEW Muncie M22 SUPER ROCK CRUSHER 4 speed $2899.00. NEW Muncie M22 SUPER ROCK CRUSHER 4 speed $2899.00. View Images. Price: ... SUPER ROCK CRUSHER M22 650 HP. CALL for orders; NEW Direct replacement M22 ;
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As Tom stated, this is a great addition for the Muncie 4 speed AND my personal favorite gearset. Do the wide ratio gear sets (M22W) have the same lower angle gear cuts as …
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A very good transmission and a considerable head and shoulders improvement over the old BW T-10. Parts are readily available, too, and very reasonably priced. ... How does the Muncie M-22 rock-crusher trans compare to the Borg Warner Super T-10 Power Brute transmission ... The Cast Iron units were sold across the counters of speed shops. The GM ...
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The Muncie 4-speed transmission is a legend among fans of GM muscle cars. For a 10 year period starting in the golden age of 1960s performance, General Motors' Muncie, Indiana transmission factory churned out several different flavors of this manual gearbox.
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NEW, Complete 67 - 68 Camaro Muncie 4 Speed Conversion Kit now available! This kit will get you everything needed to convert a automatic 1969 Camaro into a four speed machine! You have a choice of a original rebuilt GM Muncie M20, M21 or M22 Rock Crusher.
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Forged Brass blocker rings. Main drive oil seal input shaft and bearing retainer. 34 tooth 1st super strong 1st gear (stronger that the M22 1st gear). C355 Forged Aluminum mid plate. Lightened main shaft for less rotating mass. The M23 is …
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A photo from when the last Muncie M22 "Rock Crusher" 4-speed came off the assembly line. A legend for toughness during the muscle car era, its 400 lb-ft torque factory …
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How much HP will a Muncie 4 speed hold. How do you distinguish between an M21 and an M22. The M22 is what they called the "rockcrusher" right? Is that the better trans. Want …
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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.
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