Muncie 4-Speed: The Complete History. To understand the evolution of the Muncie 4-speed you have to look at a series of engineering platforms that led to the final design of this transmission. The Muncie design has roots going back to 1935. I took the time to research the patent number that is cast into most Muncie main cases.

Muncie 4-Speed: The Complete History. To understand the evolution of the Muncie 4-speed you have to look at a series of engineering platforms that led to the final design of this transmission. The Muncie design has roots …

Nevertheless, the original purchaser of this machine opted for the traditional four-speed—another GM pinnacle, the Muncie M22 rock crusher. The M22, a close-ratio box, was so called because of the reduced angle on which its gears were cut, which were stronger but considerably noisier than those in the wide-ratio M20 and close-ratio M21.

STRONGEST Direct Replacement M22 With NEW Muncie AUTO GEAR Upgraded Ultra CASE With The Strongest M22w WIDE RATIO or Close Ratio Gears for a 4 SPEED TRANSMISSION. A GREAT HEAVY DUTY …

Get the best deals for muncie m22 rock crusher at eBay. We have a great online selection at the lowest prices with Fast & Free shipping on many items!

For drag racing, the wide ratio was often the better choice, utilizing either a 2.56 or 2.52 first-gear ratio. In contrast, close-ratio transmissions (which use a 2.20:1 first-gearing) reduce the ...

(Circle racing) The 2:20 ratio Muncie Rockcrusher was usually paired with a 4:56 rear. The term close ratio comes from the fact that third gear and fourth gear in the Rockcrusher are close numerically. At 72 my brain just does not recall the number for third gear in the Rockcrusher but it was just a tweak above the 1:1 fourth gear in all muncies.

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 …

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10874 posts · Joined 1998. #6 · Apr 24, 2022 (Edited) ORIGINALLY, in the beginning of the Muncie evolution, there was the M20 (wide ratio) and the M21 (close ratio). A VERY, VERY, VERY few Heavy Duty, close ratio Muncies were specially built for severe duty service (such as for the 425hp/396 Corvettes) in 1965.

Chevy Transmissions: Muncie M22 "Rock Crusher 4 Speeds were made From 1965 TO 1974: The most popular transmission of it's time for high performance cars built for Chevrolet and all performance oriented G.M …

Depends on how well you hookup off the line if that what your going to do with it. The week link is the input shaft. Too much HP and torque and you will twist it off. It can easily handle 500HP if it's in good condition, and your careful with it. Most people think that the M22 Rockcrusher is the stronger of the Muncie's.

The input shafts are interchangeable too, you just choose a 10 or 26 spline input shaft. To help fine tune your driveability with a 4 speed; these three combination examples below have the same 1st gear takeoff feel. The differential gear is your cruising 4th gear and determines your RPM. M22 (2.20:1) - 4.10:1.

This a BRAND NEW SUPERCASE M22 Muncie Rockcrusher Style Transmission. This is a BEEFY version of the original Rock Crusher transmission. Most all the weak points of an original Muncie have been …

Home of the world's best 4 speed muncie transmissions and parts. We also offer muncie rebuild kits, racing parts and m22 rock crusher transmissions.

These letters did coincide with the broadcast code letters called out on the build sheet in 1973. For example, my metal tag would read as follows: 6271516WD. Wide ratio Muncie. In the block ...

OPTIONS YOU CAN ADD: $150.00 MICRO SUPER FINISH. $35.00 THRUST BUTTON FOR HEAVY LAUNCH AND DOWNSHIFT CASE SUPPORT. SUPER ROCK CRUSHER …

New Super Heavy Duty Direct Replacement and Strongest M22's Made With Muncie Auto Gear Upgraded Ultra Case and Strongest M22 Close Ratio or Wide Ratio Gears. 10 OR 26 spline input and large 27 OR 32 spline output shaft. C355 Forged Aluminum Mid-Plate. Super Tail. AG Roller Side Cover. A…

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 ...

This a BRAND NEW SUPERCASE M22 Muncie Rockcrusher Style Transmission. This is a BEEFY version of the original Rock Crusher transmission. Most all the weak points of an original Muncie have been solved by the Super-Case design. The Supercase has extra casting in all the known weak areas.

The Muncie four-speed transmission has its roots back to 1935 and the U.S. patent number 3,088,336 along with an engineer named James W. Fodrea.

OPTIONS YOU CAN ADD: $150.00 MICRO SUPER FINISH. $35.00 THRUST BUTTON FOR HEAVY LAUNCH AND DOWNSHIFT CASE SUPPORT. SUPER ROCK CRUSHER M22 650 HP. CALL for orders. NEW Direct replacement M22. For up to 650 HP power applications. 10 or 26 Input Spline. 27 or 32 output Spline.

10874 posts · Joined 1998. #6 · Apr 24, 2022 (Edited) ORIGINALLY, in the beginning of the Muncie evolution, there was the M20 (wide ratio) and the M21 (close ratio). A VERY, VERY, VERY few Heavy …

There was a total of 72,272 Chevelle SS 396 models, and 1,865 known L35 equipped El Caminos, sold for 1966. The optional L34 396 production totals 24,811 Chevelles, and a paltry 3,099 L78 396 Chevelles were produced, …

Chevy Transmissions: Muncie M22 "Rock Crusher 4 Speeds were made From 1965 TO 1974: The most popular transmission of it's time for high performance cars built for Chevrolet and all performance oriented G.M cars. They have the same gear ratios as the legendary M21 but with a heavy duty gearset.

STRONGEST Direct Replacement M22 With NEW Muncie AUTO GEAR Upgraded Ultra CASE With The Strongest M22w WIDE RATIO or Close Ratio Gears for a 4 SPEED TRANSMISSION. A GREAT HEAVY DUTY ROCKCRUSHER FOR YOUR CAMARO, NOVA, CHEVELLE, CORVETTE, GTO,442. THE MAIN CASE IS THE STRONGEST …

The strongest of the "Muncie" based 4 speeds, the Auto Gear M23 is your answer for strength in those higher HP and torque applications where an M20/21 or even M22 just won't do. ... You cannot …

2883 posts · Joined 1999. #7 · Dec 17, 2008. L72/RS said: Here is some test data from the 2.96 ratio Muncie transmissions that I used to build. All standard helix units failed at ~320 ft-lbf of torque with about 0.030" case stretch. All of the low helix sets failed at ~390 ft-lbf of torque with about 0.050" case stretch.

New Super Heavy Duty Direct Replacement and Strongest M22's Made With Muncie Auto Gear Upgraded Ultra Case and Strongest M22 Close …

Story By. Benjamin Hunting. The Muncie 4-speed transmission is a legend among fans of GM muscle cars. For a 10 year period starting in the golden age of 1960s performance, General Motors' Muncie, Indiana transmission factory churned out several different flavors of this manual gearbox. This imprinted the name on the brains of drag …

Rick, I'm not the expert on these here, DZauto is but here it goes. The M22 is the "rockcrusher" tranny. It's a bit more heavy duty than the M21 and much rarer. It's called a rockcrusher due to it straighter cut gears which whine ( and are stronger ). The M21 is a standard Muncie 4 speed. They both have the same ratios beginning with a 2.20 1st.

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 …