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Aug 11, 2020 As with the transmission, changing the axle ratio changes vehicle performance. A higher ratio means better acceleration, but worse efficiency. And because the engine now revs higher in each gear, the top speed drops. In contrast, a lower final drive ratio raises efficiency and top speed at the cost of acceleration.
Sep 15, 2010 This code list listed the model code, RPO regular production option, specific transmission type, gear ratio, transmission part number, and transmission letter code designation. At the bottom of the transmission codes page, there are notations dated March 25, 1965 that these same transmissions were added to the codes list.
The SM420 is a top loaded, top shifting truck style transmission. It enjoys the lowest compound gear of all the common truck transmissions at 7.051 and as such it is a popular choice for those wanting a very low crawling gear. The SM420 features a power-take-off PTO port on the drivers side of the case.
New Super Heavy Duty Direct Replacement and Strongest M22s Made With Muncie Auto Gear Super 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 great
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Oct 30, 2020 Gear Ratio And How They Change The Output. Before we explaining the working of a manual transmission we need to get into what are gear ratios and how they change the engine output. Gear ratio can be explained as the ratio of teeth of the gears. In the case of transmission its the ratio of the driven gear by the driving gear.
Chevy Transmissions Muncie M22 Rock Crusher 4 Speeds were made From 1965 TO 1974 The most popular transmission of its 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.
This a BRAND NEW SUPERCASE M22 4-Speed Rockcrusher Style Transmission. Each new Auto Gear transmission is built from genuine Auto Gear parts, the highest quality available. This is a BEEFY version of the original Rock Crusher transmission.
Jun 13, 2017 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.com. The ratio of the four-speed transmission placed in any car was usually determined by the engine size and rearend axle ratio.
Your first-gear ratio is 2.521. Gear ratios are a very important aspect of transmission selection and transmission design. Ratios can help determine proper application as well as the torque capacity of a transmission. Two areas often overlooked when selecting a transmission are gear ratio and center-tocenter distance.
Aug 03, 2018 He tells us both the M20 wide-ratio and M21 close-ratio transmissions were first offered in 1963. The M22 Rock Crusher would come later to accommodate the heavy twist of
C 2.201 HD Close Ratio M22, aka Rockcrusher The transmission code is normally located on the passenger side of the transmission, arranged vertically just in front of the tailhousing joint. See the transmission decoding information for pictures and more information.
NEW DESIGN MUNCIE M22 ROCK CRUSHER CLOSE RATIO 4 SPEED. THIS IS THE M-22 TRANSMISSION THAT GM COULD NOT BUILD 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 SEALED bearing, and slightly thicker than the original Muncies ...
M22 RockCrusher . In 1963 the Corvette Grand Sport racing program was instituted. The early Grand Sports used a special heavy-duty version of the M21 close-ratio transmission. These special units evolved into what is called the M22 today.
The 2.201 ratio first gear is usually referred to as the Muncie M21 transmission based on GMs production codes. The 2.561 ratio is referred to as the M20. Muncie also had a second close-ratio transmission coded M22 and known as the rock crusher, which was used behind performance big-block engines and in some Corvettes.
Aug 07, 2018 The M22 Rock Crusher would come later to accommodate the heavy twist of Chevrolets big-blocks in the mid-1960s. The M20 and M21 transmissions
If you do not need the above complete conversion kit we also sell the M22 Gear Set alone. Includes either 26 or 10 Spline Input Gear, 1 Bore Cluster Gear, Front Idler Gear and the First, Second and Third Gears. Use the following Part Numbers when ordering M22T10 or 26 Spline Input Gear Close Ratio 2.20 priced 733.00 per set.
Jun 29, 2021 For sale is a Factory Replica of the Close Ratio Muncie Rock Crusher Four Speed Transmission typically used in High Performance 1965 to 1974 Corvettes, Camaros, Chevelles, Novas, El Caminos, Impalas, Oldsmobiles and Pontiacs.. Also included are Hand Fitted Synchronizer Sliders and Hubs. The hand fitted slidershubs improves up and down shifting quality through all RPM ranges.
In my opinion, the T10 is stronger than the M22 rock-crusher muncie. If I had to guess, I believe this transmission was introduced to eliminate the need to have 2 different close ratio transmissions available for the car, even while the power levels were slumping. The Powerglide is a common drag racing transmission.
Again on the muncie, and looking at the cover, 3rd4th gear lever is on the left. 1st2nd gear lever is on the right. Further Muncie identification 3 Muncie 4 speeds were offered. The M-20 wide ratio, the M-21 close ratio, and the Extra heavy duty close ratio M-22, also known as the Rock Crusher .
Baker GrudgeBox 6 speed transmission for Harley-Davidson 17 - present Milwaukee 8 Models . The BAKER Grudge box has been built to take high horsepower abuse found in late model H-D performance applications while providing elegant shift precision.
Muncie Transmission is back General Motors stopped installing Muncie 4 speeds in 1974. Complete units were able to be purchased from GM until the late 1970s. Parts trickled out of inventory by the late 1980s. With the quality of used Muncie transmissions getting worse in the last 10 years, the idea of making new improved Muncie parts was ...
Jun 20, 2021 This is a very rare 660 m22 rock crusher muncie, it is a service replacement transmission unstamped, no vin, it will be correct for 68 to 70, all rebuilt and guaranteed, all new straight cut gears, 220 ratio, asking 2475.
The M21 close-ratio was available until the end of the 1974 production cycle, and then the BorgWarner close-ratio 4-speed replaced it. The M22 is a strong and reliable gearbox. Produced in low volume from 1968 to 1971, the M22 earned the nickname Rock Crusher because its straight-cut gears made a distinctive noise while driving.