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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Although the gears are not spur gears ( completely straight ) they still produced a fair amount of gear noise thus the "Rockcrusher" name. These 4 speeds sound like a blower drive. For the real gear head the best documented movie that sports a real M22 in a car is the famous movie " Two Lane Black Top ".

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The term "rock crusher" refers to the noise made by the meshing of the strong-er 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 newer units seem to perform better in high-rpm and high-horsepower applications.

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In a nutshell, the M-22 was beefed up with a new 1" countergear pin and the helical-angle cut gears which make that great gear noise we all love so much, thus the name "rockcrusher". Jun 13, 2012 #3 axlefoley Veteran Member

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M22 Rock Crusher Noise. Jump to Latest Follow 1 - 6 of 6 Posts. 6. 68Camaro396/375 · Registered. Joined Mar 30, 2005 · 37 Posts . Discussion Starter · #1 · May 9, 2005. I know that a M22 makes a whining sound in 1st, 2nd & 3rd gears but how loud? ...

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Muncie M22 Rock Crusher 4 speed - Hot Rod Forum : Hotrodders ... Can someone tell me how much a muncie m22 rock crusher is worth this transmission was produced buy gm in 1966&1967.

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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 newer units seem to perform better in high-rpm and high-horsepower applications.

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1968 Chevrolet Corvette L88, 427/430hp, M22 Rock Crusher for ... Classic 1968 Chevrolet Corvette L88, 427/430hp, M22 Rock Crusher for sale $55900. ... The rumbling sound and less than 50 miles driven since the rebuild. Read more

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Decibel Level Rock Crusher ilcapriccio falisolle . rock crusher noise levels Grinding Mill China noise levels quarry rock crushers Grinding Mill Quarry the free encyclopedia A quarry is a type of openpit mine from which rock or minerals are Online Service concrete crusher sound level .

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The M21 & M22 is a four speed, RWD or 4WD transmission. The M21 & M22 is a Muncie engineering design, this transmission is aluminum case, extension housing and side cover. The side cover has seven bolts and two shift cams. The synchro rings have 35 teeth and the unit has a 4 step cluster gear. The reverse gears are helical cut and are located ...

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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 …

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Noise standards for 1973 lead to the demise of the M22, plus the 454 was getting its heart ripped out by specific emissions tuning so it no longer threatened to trash an M21. The M21 was the 4-speed spec'd for the LS4 of 1973/74.

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Recent Comments. Joe Gio on Muncie Super Duty M23 Super Case 4-speed Road or Drag Racing Rock-Crusher. FALL SALE ON NOW!!! steve cooke on Muncie Super Duty M23 Super Case 4-speed Road or Drag Racing Rock-Crusher. FALL SALE ON NOW!!! Mark A Jones Deltona Florida on Auto Gear Super Case M22Z Rock Crusher 4-speed. Perfect Performance with 2.73 to 3.42 Rear End Gears.

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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."

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1970 ss 454 chevele ls6 with m22 rockcrusher

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The term "rock crusher" refers to the noise made by the meshing of the strong-er 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 newer units seem to perform better in high-rpm and high-horsepower applications.

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The rock crusher gears alloy content is different and the different gear angles make the noise. The ratios are the same for both. Is there a difference in the synchros or anything else to make an M22 …

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M22 Rock Crusher Noise | Hot Rod Forum. May 12, 2005· 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.

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I believe that you are confused about the "rock crusher moniker" The Muncie M22 was called the rock crusher because the gears were cut at less of an angle to reduce the end load on the gears. This reduced angle causes a loud whining noise, so it was named the rock crusher.

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SOUND BITES. February 05, 2019. There is a motorcycle manufacturer – you know the one – whose engine and exhaust notes are as jealously guarded as money in the bank. Recently, I had an interesting conversation with an Auto Gear m22 customer who maintained that the whine produced by GM's 'Rock Crusher' four-speed was equally valuable.

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Michael Welage on Auto Gear Super Case Muncie M22 4-Speed Rock-Crusher, Camaro 4-speed 10/27 or 26/27spl. FALL SALE ON NOW!!! Shawn Riley on Muncie Super Duty M23 Super Case 4-speed Road or Drag Racing Rock-Crusher. FALL SALE ON NOW!!! Michael OBrien on NEW Auto Gear Super Case Muncie M22 4-Speed Rock-Crusher Street/Strip. Camaro, Corvette ...

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The first is that the M22 has 20 degree helical cut gears and the M20 and 21 have 30 degree helical cut gears. the lower angle reduces thrust wear, heat and increase strength do the gear tooth being thicker, but it increases noise. which is why it is called the "Rock Crusher".

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Why is the Muncie M22 called the rock crusher? M22 gears are also made of a higher-grade nickel alloy. The M20 and M21 cluster gears are cut at a 45-degree angle. The reduced gear angle of the M22 created a problem with noise (hence the name "rock-crusher"). How much power can a Muncie handle? It'll handle 450 hp in a 3500 lb car with no ...

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A video with better audio of the nostalgic sound of a Muncie M22 (Rock Crusher) transmission at work in a 1966 Chevrolet Chevelle.

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Easily compare Best Prices for M22 Rock Crusher. 1974 Chevy M22 Close Ratio "Rock Crusher" Muncie 4 Speed Transmission 3925661 by $5000.00 $5000.00 Speedway Chevy Clutch Hydraulic Release Throwout Bearing Kit Easy Hydraulic Clutch Actuation for Your Race CarPrepping your race car for the weekend race is a lot easier when you have a solid drivetrain putting your …

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1969 chevelle, small block, m22 rock crusher, 355 12 bolt eaton posi, new rear tires. Save Share. Reply. D. ... do u have a boost gauge on your truck? if so what does it do when the noise is occouring? if not....it might not be a bad idea to atleast hillbilly one in for diagnostic purposes! manual gauge would be much better than a digital too! ...

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An M22 retains less heat due to the straight-cut gear design and the lack of thrust that helical-cut gears create. An M-22 holds up well. 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.

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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

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it's electric, it has the button on dash, it's an LT 2500hd that is pretty loaded. The noise sounds like my Muncie M22 rock crusher in my Camaro, …

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The M22 'Rock Crusher' featured a one-inch countershaft pin bore and shot-peened gears with aggressive helix angles that reduced heat and stress but also increased noise, leading to the nickname as the transmissions rattled their way down the road.

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