Complete Guide to Muncie Transmissions
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 …
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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 …
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How to Identify Muncie 4 Speed Transmissions. Identifying Muncie 4 Speeds III by Paul Cangialosi : The most popular question has to be that everyone thinks they have the famous "rockcrusher" M22 4 speed. This …
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23 posts · Joined 2019. #1 · May 1, 2019. I am changing out my 700r4 to a muncie 22 rock crusher. I have a few questions: i just bought a 72 chevelle ss clone. The system is a chevy 383 stroker and 700r4 is the drive shaft i am using now. will the drive shaft have to be cut or lengthened if so by how much for the 383 stroker and m22 rock …
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1. The main case date code is usually found on the passenger side of the case just below the casting number. 2. The extension housing date code can usually be found on the …
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M22 transmissions can only be identified removing the selector cover(side cover) and visually identifying the straight cut gears-all other muncie transmissions had …
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M22 = stronger close ratio. Shifty Shifterton, Jun 26, 2008. SHARE POST #2. Deuces likes this. earl schieb. Member. from MID-TN across from the cows. Look on …
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Chevy M22 Rock Crusher Manual Transmissions3 muncie 4 speeds were offered. the m20 wide ratio, the m21 close ratio, and the extra heavy duty close ratio m22, also known as the rock crusher . the m22 was generally installed behind severely powerful high torque bigblock engines. the m22 is distinguished from an m21 by the angle of the gear teeth ...
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Jim Mac. 12592 posts · Joined 2004. #5 · Apr 24, 2022. hopefully he meant that a m22/rock crusher was rarer installed in a car. jim. Jim. 70 chevelle, SS clone 454 …
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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 …
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05. If your Muncie is anything like ours, a thorough cleaning is the first step in the rebuild process. Ours had years of accumulated oil and dirt. We recommend using some sort of product that ...
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Muncie Rock Crusher Hotrunnersolutions Ingm muncie m rock crusher identification the m close ratio transmission is easily identified internally from the m and m versions by the angle of the gear teeth.muncie m22 rock crusher identification Mar 05, 2011 An M 22 Rock Crusher is a Muncie four speed transmission for cars made by General Motors in ...
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An M-22 "Rock Crusher" always has 26 teeth. Count the number of splines in the transmission. M-22 "Rock Crushers" made between 1967 and 1970 have 10 splines; …
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The bearing retainer slips over the input shaft and seals the transmission from the front. See All 34 Photos. Fully lubricate the detent levers and side arms with assembly lube. Move the spring ...
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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" was born.
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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 I'm thinking it could be a M22- realize ...
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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 …
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Garry Brown on Super Pro Road/Race Muncie Upgraded Ultra Case M22 Rock-Crusher. SALE EXTENDED!!! Michael wilhelm on Auto Gear Upgraded Ultra Case M22Z Rock Crusher 4-speed. Perfect Performance with 2.73 to 3.42 Rear End Gears. SALE EXTENDED!!! Ricky Fitts on Muncie Super Duty M23 Upgraded Ultra Case 4-speed …
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Jim Mac. 12592 posts · Joined 2004. #5 · Apr 24, 2022. hopefully he meant that a m22/rock crusher was rarer installed in a car. jim. Jim. 70 chevelle, SS clone 454 4 speed 3.31 12 bolt posi. 71 …
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Garry Brown on Super Pro Road/Race Muncie Upgraded Ultra Case M22 Rock-Crusher. SALE EXTENDED!!! Michael wilhelm on Auto Gear Upgraded Ultra Case M22Z Rock Crusher 4-speed. Perfect Performance with 2.73 to 3.42 Rear End Gears. SALE EXTENDED!!! Ricky Fitts on Muncie Super Duty M23 Upgraded Ultra Case 4-speed …
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These M22 units are highly sought-after for performance applications. The term "rock crusher" refers to the noise made by the meshing of the stronger helical gears in the M22. Later model 1971-'74 Muncies are also popular with racers, because these transmissions used a 32-spline output that is stronger than the early 27-spline, and the …
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If it's got 10 splines and 2 grooves cut around its circumference, it's a M-20. If it has 10 splines and 1 or no grooves, it's a M-21. If it has 26 splines, it's a M-22. The original post said "without pulling it from the vehicle" Thus the request for any/all numbers on the trans to Help identify it.
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C-M22 MODEL IDENTIFICATION(1969-1972) A-M20 B-M21 C-M22 ... The most well known Muncie transmissions are the M20(wide ratio), M21(close ratio), and the M22(rock crusher). Although not mentioned much, there was also an M23 transmission that was used, beginning in 1970. The M23 is recognized by a 26-spline(fine) input shaft …
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1969-1974 codes include a suffix letter at the end to aid in identification of transmission ratios. A = 2.52 1st gear wide ratio M20, B=2.20 1st gear close ratio M21, C = 2.20 first gear Rock Crusher M22. One example code would be ( P0E21 A ) which reads: Muncie four speed aluminum for passenger car, 1970, May, 21st, ratio M20.
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All 68 Muncies used the 660 case. A 68 M-22 will have a 10 tooth input spline with no rings in it and a 26 tooth output spline. You can't always go by the ring (or lack …
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im looking forward to the classic m22 whine with the new Auto Gear Muncie (ultra wide ratio) M22Z. It has 2.98/2.04/1.46/1 ratios. First gear 2.98x3.08 rear yields 9.2 in first. MUCH better than my previous clutch slipping setup with 2.64x2.73=7.2. With 27" (255/60/15) tires highway rpm should be 2300@60, 2500@65 and 3000@78 - thats nice.
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If your sure its a real M22, its a pretty rare transmission. THey go for about $800-1200 on EBay depending on condition. I know because I was once looking for on until I got a Borg warner instead. If its an M22, the input shaft should have no rings on it and the spline count should be 26. They are nice transmissions.
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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 …
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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 wide- and close-ratio units. The M22 to come later in 1967-'74 is also a close-ratio unit, but much stronger than the M21, with a higher torque ...
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Put the transmission in 2nd gear and remove the side cover to view the helix angle of the gears and the condition of the synchro engagement teeth. Fair market value could be as much as $1500-1600 …
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The M-22 gear teeth are cut at a noticeably lower angle (not quite at a straight angle as some people say). This lower angle of the teeth imparts greater strength to the gears, but it also increases the noise caused by the meshing of the gears. This higher level of noise is where the nickname "Rock crusher" originated.
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