Muncie four-speeds - What to look for: hunting down G - Hemmings .The 2.20:1 ratio is commonly designated as the Muncie M21 transmission. The 2.56:1 ratio is commonly referred to as the M20. Muncie also had a second close-ratio transmission designated M22 and often referred to as the "rock-crusher," which was used behind the highest-performance engines and in Corvettes, the M22.muncie transmission rock crusher,muncie transmission rock crusher,Magical Muncie Four-Speed | Hotrod HotlineThe 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-ratio units. You can pretty much get what you want. Beefed up boxes for hot.
Muncie 4 Speed Transmissions - 5SpeedThe 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 reason you may ask? Well it wasn't designed so that you could go drag racing on Saturday night or impress in front of Burger King by.muncie transmission rock crusher,How to Rebuild a Muncie Four-Speed Transmission - Rock The .Oct 7, 2014 . It was time to give the Muncie four-speed a rebuild. 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. From the OEM factories to racetracks to concours restorations, the Muncie four-speeds remain.John Frank
The 2.20:1 ratio is commonly designated as the Muncie M21 transmission. The 2.56:1 ratio is commonly referred to as the M20. Muncie also had a second close-ratio transmission designated M22 and often referred to as the "rock-crusher," which was used behind the highest-performance engines and in Corvettes, the M22.
An M22 retains less heat due to its straight-cut gears and the lack of thrust that helical-cut gears create. An M-22 holds up well. The downside is it tends to make noise. It will rattle at low rpms and whine at high rpms. The M22 is called the Rock Crusher. People think all Muncie four-speeds are Rock Crushers, but they're not.
1967-1971 Chevrolet Muncie M22 Rock Crusher 4 Speed Transmission. $2,100.00. Buy It Now. or Best Offer. 11 watching. 1967-1971 Chevy Muncie M22 Rock Crusher 4SP.
Jun 13, 2017 . The Muncie four speed was produced in two ratios: the wide ratio (M20) and the close-ratio (M21). That being said, there was a second, close-ratio version (M22) that was developed to survive duty behind engines with a higher torque output, and was known as the “Rock Crusher.” This version was offered.
This is the current Muncie M22. Your can see that the layout of the geartrain is identical to the ST10's. All gears and synchronizers are in the same position. Notice how the angle of the M22 gears is much straighter than on the ST10. The noise level increased because of this angle, giving the M22 the nickname “RockCrusher.
The M22 transmission has a 20 degree helix angle on the gear set as opposed to a 45 degree angle found on the M20 and M21 and were made with 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".
NEW, Complete 69 Camaro Muncie 4 Speed Conversion Kit now available! This kit will get you basically everything needed to convert a automatic 1969 Camaro into a four speed machine! You have a choice of a original completely rebuilt GM Muncie M20, M21 or M22 Rock Crusher transmission. With this new kit you also.
General Motors is an innovator of automatic transmissions, introducing the Hydra-Matic in 1940. This list includes some GM transmissions. Contents. [hide]. 1 Automatic transmissions. 1.1 Early models; 1.2 Turbo-Hydramatic; 1.3 Electronic Hydra-Matics; 1.4 Other automatics; 1.5 Future. 2 Manual transmissions.
Sep 11, 2008 . IMHO save the close ratio gearsets of the M22 for use ahead of 3.73:1 and larger ratio rear ends, and FWIW I wouldn't go smaller than a 3.36:1 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".
Axle ratios of 3.73 and lower (numerically higher) came with close-ratio transmissions, while axle ratios of 3.55 and higher (numerically lower) used wide-ratio transmissions. In addition, many GM high-performance engines came with M-22 “Rock-Crusher” in the 1970-73 years, however an early version of the M-22 was.
NEW DESIGN MUNCIE M22 ROCK CRUSHER CLOSE RATIO 4 SPEED. THIS IS THE M-22 TRANSMISSION THAT GM COULD NOT BUILT! 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 Muncie! The front bearing is a.
Oct 17, 2006 . What kind of abuse can these transmissions hold? I can get one for around $800 with a year warranty, but i dont know if it will hold up to possible future mods. Im looking at adding some type of forced induction later and i want manual tranny that will hold up to it, so any input would be great. I've heard of.
Muncie M21/M22 (Also M20 and BW T-10). Lawrence Wight's, 69 Camaro. Gear Vendors owes a lot to the Muncie close ratio trans. These words are very similar for the M20 and T10 but with some slight ratio differences depending on model.All M21/22 have the same 22% upshift and 28% downshift spread as the Gear.
M22 Rock Crusher. M297-8E, 65-74, Cluster 1", 27-22-19-17, $210.00. M22W-8E, 66-74, Cluster 1", 25-22-19-17, $242.00. M297-16U, 65-74, Input 10 spl, 26T, $178.00. M22W-16U Wide, 66-69, Input . M20/M21/M22 Common Gears. M297-10A, 63-74, Rear Rev . Muncie 4 Speed Rebuild Parts. Part #, Year, Description.
Jul 5, 2016 . The Muncie was used with most performance General Motors engines. Identifying The Muncie. 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” (M22) that was offered on.
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.
and 3925661. All M20-M21-M22 with 1.00” diameter cluster pin. DMR-M-22 Muncie 4 speed transmission wide ratio. DMR-M-21 Muncie 4 speed transmission close ratio. DMR-M-20 Muncie 4 speed transmission “Rock Crusher”. The following illustration numbers can be locate in the 4-speed drawing. VIC-M20-5050. Item 1.
Jun 3, 2015 . The 2.56:1 ratio is commonly referred to as the M20. Muncie also had a second close-ratio transmission designated M22 and often referred to as the "rock-crusher," which was used behind the highest-performance engines and in Corvettes, the M22 is a highly sought-after performance transmission. It is the.
as stated its not an automatic, gm used those transmission in a lot of vehicles,it was the m-22 or muncie four speed tranny which was used in everything from chevelle, SS,cars to impala SS cars,even some of the vega transmissions was m-22,s, they was very popular back in the 60,s and 70,s,the reason.