m21 rock crusher

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  Muncie 4 Speeds Big Dog Garage

  Year 1970 1974 Type M21 Rings One Spline 26 Tooth Count 26 Year 1967 1970 Type M22 Rings None Spline 10 Tooth Count 26 thus the nickname "rock crusher" The higher nickel alloy allowed for more impact of the gears Another misconception is if you have a drain plug you have an M22 Again this was only true when the first M22 boxes

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  M22 Rock Crusher

  Muncie M22 "Rock Crusher 4 SPEEDS FROM 1965 TO 1974 This page is devoted to OEM Complete units; New aftermarket units and OEM parts and NOS parts M21 and M22 4 speed whether it is complete rebuiding or attending to a particular problem we can recommend a local re builder to provide the necessary service

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  GENERAL MOTORS MUNCIE 4 SPEED MANUAL

  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 synchro rings w/ support shoulder 1966 74 3924113 3924113

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  Chevy Transmissions Muncie 4 Speed M22

  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 performance oriented cars They have the same gear ratios as the legendary M21 but with a heavy duty gearset

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  M22 Wide vs M22 "Rock Crusher" Team Chevelle

  Oct 28 2008— 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 The M21 was mostly used by GM on & numerically higher ratio rear axles the M20 on & lower ratios The M22 was set up

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  Identifying Muncie 4 Speeds Chevelle Info

  Ratios of the M20 M21 M22 Muncie 4 speeds were produced in two different ratios wide ratio M 20 and close ratio M 21 An extra heavy duty close ratio version M 22 was also offered on many of the big block high performance choice of transmission was dictated by the engine size and rear axle ratio Axle ratios of and

  Converting to a M22 Rock Crusher Team Camaro Tech

  Jul 11 2013— The engine has been freshly built and pushing 450 500HP I am looking at either a Keisler 5 speed or the legendary M22 Rock Crusher from Midwest Muncie Can anybody tell me if the M22 would bolt right in using existing cross member mounts and drive shaft or M21 other than a slight ratio difference X2 on the rear end gear

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  Muncie m20 vs M21 Hot Rod Forum

  Sep 6 2014— M20 has weak internals and case but ok for street and chirping street tires the M21 is a better choice for muscle on the street and a little weekend drag racing but the case is week Ive sheared the case ears off and twisted off tail shafts when running wrinkle wall slicks the M22 the rock crusher as we racers called them are designed to take

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  GM Muncie 4 Speed Decoding Drivin It Home

  See our selection of M20 M21 M22 and M23 4 Speed Muncie Transmissions for Sale here at Your trusted source for quality Muncie Manual Transmissions and Parts

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  Muncie M 22 Rock Crusher Chevrolet Nova Forum

  Aug 30 2008— So in effect the "Rock Crusher" is weaker in terms of torque transmission than a M21 close ratio box found behind a BBC Because everyone thinks the "Rock Crusher" is bullet proof they tend to abuse them until they break Then they tend to patch the busted tranny up enough to sell it to the next victim who thinks they are great

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  M 22 "rock crusher" Page 2 Team Chevelle

  Apr 24 2022— come guys every gearhead knows every muncie is a rock crusher every 327 came out of a corvette and all 12 bolts are posi s I didn t even read this on the internet 70% of the guys at the gas station tells me this when I m gassing up they all had that rare 68 chevy with a corvette 327 rock crusher muncie and a 12 bolt posi that they would

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  What Gear oil do you use in your Muncie CorvetteForum

  Jan 14 2005— Torco Lucas and other 75 90W unless it is a M 22 that needs a "special" gear oil for it s gearset I use Redline Shockproof 75 250 in my "Rock crusher" but synthetic seems to leak past the gasket technology of our Muncies a very slight leak but after sitting weeks in the garage a penny size pool can be seen

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  When was the M22 first called "rock crusher" Team Chevelle

  Apr 26 2016— The M21 and the M22 are both "close ratios" with the same ratios The main difference is the helical angle differences with the gear M21 had a greater angle which was quieter The M22 was "closer" to straight cut so it was noisier not saying it was close to straight cut just closer than the M21

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