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
IMHO save the close ratio gearsets of the M22 for use ahead of 1 and larger ratio rear ends and FWIW I wouldn t go smaller than a 1 rear gear even with a wide ratio Muncie box Forget the Muncie OD unless it s going in your pickup truck BTW you can now buy high quality M22 "rock crusher" style wide ratio gearsets
The M22 Rock Crusher followed four years later It uses stronger components to handle big block power The original M20 was only offered for one year It has the GM casting number 3831704 on the case Contrary to popular belief you cannot tell a 4 speed Muncie is an M22 by looking at the input shaft splines All M22s use a 26
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
The Z28 would morph from its SCCA roots to come with a Corvette based LT1 350 V8 that produced a neck breaking 360 hp with 380 ft/lbs of torque This 70 Z28 has been restored across its last two owners and has the highly desirable M 22
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"
M22 Rock Crusher Noise Jump to Latest 9K views 5 replies 4 participants last post by k star May 12 2005 6 68Camaro396/375 Discussion starter 37 posts · Joined 2005 Add to quote; Only show this user #1 · May 9 2005 I know that a M22 makes a whining sound in 1st 2nd & 3rd gears but how loud
M22 Rock Crusher Just bought a 1968 originally was 427/ has a CE replacement block from 69 and I believe it has a M22 vice M21 Intent at some point in the near future is to crawl under and check numbers/code You can tell if it is a M22 the minute you start moveing down the road It will wine in first second and third
m22 is a really noise tranny "From what I hear" Ill tell you what you hear and it is alot of the gear isnt very low at all and if any gm tranny I would get the M20 if you must have the manual and but put gears in Truely manuals break lots of parts when raced and are not great in heavy traffic they still hold a certain cool factor but the novality soon
6 What you will get in our Syracuse M22 is a gearset that is stronger more durable and cooler running The gearsets are available in three ratios The classic Rock Crusher M22 /// for your 1 rear axle gear The AutoGear wide M22W /// for your 1 1 rear axle gear
First Generation Camaro Info and Tech 1967 1969 Transmission & Driveline
The Gear Box is the source for Muncie Parts like the new assembled M22 SUPER ROCK CRUSHER 4 speed kit with micro super finish or downshift case support The Gear Box Transmissions Muncie Tremec Saginaw TKO Top Loader Richmond Home View Cart Muncie Kits & Parts T56 T56 Corvette GTO CTSV TR6060 / T56 Magnum T10 Super T10 TKX T5
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
Muncie M22 4 Speed Rock Crusher Gear Kit Input Cluster 1st 2nd 3rd Idler Gear Opens in a new window or tab Brand New C $ Buy It Now from United States Sponsored Top Rated Seller Top Rated Seller acerl 42 130 % How to Rebuild Muncie 4 Speed Manual Transmission M20 M21 M22 Rock Crusher Opens in a new window or tab
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 shift from first to second
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"
This bumbed me out since I had previously read that this was an indication that it was a Saginaw not a Muncie It does have a 7 bolt side cover Doe this mean it s still an M22 but just manufactured at the Saginaw assembly plant or it s not an M22 "Rock Crusher Transmission" I am just learning
i have an m22 rock crusher i d like to change the oil but im not sure what type of oil weight to put into it 80/90 matching # M22 w/CF dual friction clutch Holley 750 HPs dp 82751 on Weiand Stealth & MSD Pro billet HEI Hedman
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 rating limits what it can handle with modern performance The whining of these transmissions was very distinctive This is the transmission I have in my…
4My I believe that all M22 s had a lower drain plug and there s no question they all had the big output shaft so if yours doesn t have both you can pretty well decide it s an M20 or M21 M22 s were made in both course spline and fine spline inputs Now here s the problem
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 the side where a bolt will secure your shifter linkage levers This is the Muncie M 22 Rockcrusher four speed
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$
GTO 3 Speed Transmission 1972 GTO Heavy Duty 3 speed transmission Dearborn Muncie M13 M12 Muncie M20 M22 rock crusher Auto Round Up MagazineA thanks for the nice words The transmission listed on the build sheet you sent me is indeed the Heavy Duty 3 speed transmission I spoke of in the a recent Auto Roundup/Car Collector
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