C3 General - M22 Rock Crusher - Just bought a 1968 (originally was 427/435..currently 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. I know it has the factory 411 rear end (Code FB) so that is the first reason...
The M22 Rock Crusher would come later to accommodate the heavy twist of Chevrolet's big-blocks in the mid-1960s. The M20 and M21 transmissions produced from 1963-'74 are easy to identify in both …
The M22 Rock Crusher would come later to accommodate the heavy twist of Chevrolet's big-blocks in the mid-1960s. The M20 and M21 transmissions produced …
An M-22 "Rock Crusher" is a Muncie four-speed transmission for cars made by General Motors in the 1960s. Identify a transmission type correctly before fitting it into your car. If you have the incorrect transmission, your car may not function properly. You can identify several unique signs that identify an M-22 "Rock Crusher," even if it does ...
ORIGINALLY, in the beginning of the Muncie evolution, there was the M20(wide ratio) and the M21(close ratio). ... ONLY AND ALL M22 MUNCIES ARE CALLED ROCK CRUSHER! For folks who may not be familiar with the difference in the angles which the teeth are cut in an M20/M21 and and the M22, below is a comparison. The M22 is …
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.
I was just wondering how many different variations there are of the Muncie 4 speed and which ones are best and for what reason (s). I currently have an M22 Rock …
Although some claim that the M23 is a 'rock crusher', it is indicated that this box was assembled in both wide and close ratio components and also with straight cut gears common to the rock crusher (M22) transmission. Looks like you have a second design-feb. 28th, 1968, M20 or M21. Definitely not a rock crusher(no straight cut gears).
This would be the M21, which most had, and the M22 which very few had. You're right about the guy being way off. Guys always say they've got a rock crusher when they are refering to any Muncie, there are big differences as we know. The M20 is a great trans though. It is the same as the M21 except for first gear, it has a lower first gear.
The downside is that it tends to make noise. It will rattle at low rpms and whine at higher rpms. The M22 is called the Rock Crusher. "Dump the Rock Crusher," hot rodders say. People think all Muncie four-speeds are Rock Crushers, but they're not. Nowadays there are custom gear ratios and set ups, including M21 wide-ratio and M22 wide ...
Muncie Gasket Set M20 M21 M22 1963 -1974. Complete Muncie gasket set for all Muncie transmissions. From $19.95 . ... The Rock Crusher earned its name from the audible noise it produced, resembling the crushing of rocks, and it quickly gained popularity among drag racers and street racers alike. ...
M21's are inherently weak, but the M22 aka ( rock crusher ) is the beefed up version of a close ratio m21, the M22's were designed to handle the higher torque and HP of GM's big block engines produced through the mid to late sixties, the super T10 was produced from 74 to 82, they have a 21 spline input shaft, hardened gears and a …
Muncie M22 "Rock Crusher 4 SPEEDS FROM 1965 TO 1974: This page is devoted to OEM Complete units; New aftermarket units and OEM parts and NOS parts. ... M21 and M22 4 speed whether it is complete rebuiding or attending to a particular problem, we can recommend a local re-builder to provide the necessary service. ...
The M20 and M21 used a gearset with a more angled tooth design on each gear (left). The M22 Rock Crusher used a gearset that features less of an angled-tooth gearing (right). Images courtesy chevelles. The gear ratio of the Chevy four-speed transmission placed in any car was usually determined by the engine size and rearend …
Across the top of the page are the words "First Build 4/15/65 – 1st Shipment 4/19/65, recap of M22 (Rock Crusher) Trans." By comparing these M22 transmission assemblies to Chevrolet's 1965 transmission identification codes, I found a perfect match. ... All 1963-65 M20 and M21 transmission used a 7/8″ countergear pin in all assemblies.
I also have a M21 with same close ratio as m22 but with two rings on front spline. @@@@@ M22 specs 10PP229308 stamp on casting 3925661 casting ... " 3000$ on a bolt on, period correct, grin inducing …
The M20 / M21 transmissions when in good condition are a fairly quiet transmission. If you want to know what a M22 sounds like get the movie 2 lane blacktop. ... Thats what puzzels me if I really do have a Rock Crusher. Save Share Reply Quote Like. K. k-star. 3072 posts · Joined 2004 Add to quote; Only show this user ...
Look in the post at the top on the trans fourm. It tells how to pick out what is what but the main thing to look for in a M-22 is the gear angle. Take off the side cover …
8. The M22 Rock Crusher 26-spline input shaft sports a wider gear for greater torque capacity. Just because you've found a 26-spline input shaft does not mean you've found an M22 input shaft, which …
Recent Comments. Randall D Resler II on Auto Gear Upgraded Ultra Case M22Z Rock Crusher 4-speed. Perfect Performance with 2.73 to 3.42 Rear End Gears. SALE EXTENDED!!! Jeff Collins on Muncie Super Duty M23 Upgraded Ultra Case 4-speed Road or Drag Racing Rock-Crusher. SALE EXTENDED!!! Thomas N. on Muncie Super Duty …
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 …
Muncie four-speeds were produced in two different ratios: the wide ratio (M20) and the close-ratio (M21). There also was a second, heavy-duty close-ratio version: the "Rock Crusher" …
The M20 and M21 have the same cut to the gears, the M22 is a straighter cut resulting in a greater strength. Since the M20 and M21 look the same one way to tell them apart (aside from the grooves on the input shaft) is the tooth count on the cluster gear. ... thus the nickname "Rock Crusher" was born. Another misconception is if you have a ...
Recent Comments. Randall D Resler II on Auto Gear Upgraded Ultra Case M22Z Rock Crusher 4-speed. Perfect Performance with 2.73 to 3.42 Rear End Gears. SALE EXTENDED!!! Jeff Collins on Muncie Super Duty M23 Upgraded Ultra Case 4-speed Road or Drag Racing Rock-Crusher. SALE EXTENDED!!! Thomas N. on Muncie Super Duty …
Initially there were two specific Muncie transmissions available: the M20 wide-ratio (2.56:1 first gear) and the M21 close-ratio (2.20:1 first gear). The latter also offered a 1.64 second, 1.28 third, and direct-drive 1.00 fourth gear, making it the most popular choice for street racers (as a close-ratio …
Get the best deals for Muncie M22 Rock Crusher 4 Speed Transmission at eBay. We have a great online selection at the lowest prices with Fast & Free shipping on many items! ... Muncie M22 Gear Set 2.20 Ratio Rock Crusher 10 Spline Input Fits M20 M21 4 Speed. Opens in a new window or tab. Brand New. $569.98. or Best Offer. Free shipping ...
You can outfit an M20 or M21 with Rock Crusher type gears, OR actually make a 3 speed O/D out of a 4 speed case. Forth being the overdrive obviously.. Kinda nice if you want the Muncie look and an overdrive.. Tony, Jun 26, 2008. SHARE POST #8. Joined: Feb 24, 2006 Posts: 3,489. Profile Page. BrandonB. ALLIANCE MEMBER ...
The transmission would make the same rock crusher noise, but I would have a much tougher transmission. 1966 Charger (383, 727 Torqueflight) 1970 SS 454 Chevelle (LS5+2, M22, 3.31 12 bolt)
It tells how to pick out what is what but the main thing to look for in a M-22 is the gear angle. Take off the side cover and look at the angle of the gears. M-20, m-21 will have 45 degrees gears and the m-22 is 22.5 degrees. They used this to reduce friction and in turn gave it a nice greary noise thus the rock crusher. Chris
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