the muncie four-speed transmission was heralded by many as an indestructible four speed used by general motors, and found its way into many different car models, behind various engine combinations between 1963 and 1974. if you are not sure how to distinguish between an m20, m21, or m22 muncie, knowing what to look for can be tricky.
specials - 4 gear trans. we will update the page daily or as items are purchased and no longer available. the awesome muncie m22 'rock crusher' 4 speed transmission these units are living behind 700 hp and 625 ft pds of torque in high performance streeters, drag race, road race
the muncie case replaced the t10 4-speed in the 1963 chevrolet bel air and corvette by mid-may of that year. the t10 front bearing size was reduced in diameter in 1963 only. this meant that the transmissions front bearing retainer and register bore of the bellhousing were also smaller in diameter.
muncie 4-speed: the complete history. the most common main case casting was. this larger diameter was necessary because the big-block and small-block engines were producing more power. as a result, all m20, m21, and m22 countergears had to be redesigned to accommodate a larger countershaft.
are gm m munice rock crushers speed trans good for hp. muncie rock crusher speed transmission - yesweschoolit. are gm m22 munice rock crushers 4 speed trans good for hp 1967 chevy chevelle ss396 - the greek chariot - muscle car 7 aug 2012 beneath the factory shift lever is a muncie m22 rock crusher four-speed transmission: muncie m22 4-speed manual rearend: gm 12-bolt with 373 gears, 24/7 online
new auto gear super case muncie m22 4-speed rock-crusher 26/32spl street/strip. on sale c355 forged aluminum mid-plate. super tail. ag roller side cover. a great super heavy duty rock crusher m22 for your camaro, nova, chevelle, corvette or other gm car. close ratio = 2.20-1st, 1.64-2nd, 1.28-3rd, 4th direct. wide ratio = 2.56-1st, 1.75-2nd, 1.36-3rd, 4th direct or comp m22w 2.56-1st, 1.90-2nd, 1.48-3rd. built for big hp.
an easier solution would be to find one of the more standardized 2.52:1 or 2.20:1 muncie four-speeds that were used from 1966-74. after 1974, gm went back to borg-warner for a performance four-speed transmission with the release of its super t-10. the following vehicles are likely sources of a muncie four-speed.
the rock crusher was the m-22 muncie close ratio 4 speed transmission favored in the '60's gm hot rods.well balanced, smooth shifting and after '60 aluminum cased capable of a lot of hp. dan w · 9 years ago.
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the m21 and 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 cut and are located in the extension housing. select this link to see what models that used this 4 speed transmission.
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that something came in 1963- the muncie 4 speed. a 10 spline muncie m21 transmission 1963 would be the first year for the muncie, where it would be installed in the corvette and some full-size cars.
gm m22 munice rock crushers 4 speed trans this is a perfect direct replacement 4speed for any 6370 gm 4speed car with some real hp. strongest direct replacement m22 with new muncie auto gear super case with the strongest m22w wide ratio or close ratio gears for a 4 speed transmission.