The M22 will be a little stronger than the RST10-----and will have a distinct whine in 1-2-3 gears. If there is a down side to an M22, is that it ONLY came in a close ratio version (2.20 1st gear). And that will …

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At a Glance 1969 COPO Camaro in Fathom Green Owned by: Tim Schell Restored by: Previous owners Engine: 427ci/425hp L72 V-8 Transmission: Muncie M22 close-ratio 4-speed manual Rearend: Chevrolet 12 ...

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1965-'70 M22 2.20:1 ratio 10-spline 1-inch shaft; no groove; 27-spline output shaft. 1971-'74 M22 2.20:1 ratio 26-spline 1-inch shaft; no groove; 32-spline output shaft. On 1969-and-newer Muncies, you can …

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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, …

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Notice that although the 2-3 and 3-4 drops of the Super T10 and Muncie are pretty close percentage- wise, but the 1-2 drops vary quite a bit. The reason is that the Super T10s have a lower (higher numerical) first gear. The 2.88 and 2.64 ratios are further away from direct than the Muncie's 2.20 first-gear ratio. What Makes a Close-Ratio Close?

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The Muncie was designed to shift better than the T10; it used larger-diameter synchro cones. Both the M20 wide-ratio and M21 close-ratio transmissions were offered. These were the only ratios ever offered from …

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Muncie also had a second close-ratio transmission called an M22, which enthusiasts christened Rockcrusher; this was used in performance big-block engines and Corvettes and is a highly sought-after performance transmission today, and is the heavy-duty version of the 2.20 ratio M21 4-speed. ... 1965-70 M22 2.20 ratio 10-spline 1-in. …

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In the Muncie world you have close and wide. Thats it. On the BW side, it can get a little bit more complex, but not terribly. The M20 gear ratio was created by GM as a way to create a 'wide ratio' on the Muncie 4spd platform, that re-used everything from the M21 except the input and cluster gears (as a cost effective alternative to the BW T10).

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39873 posts · Joined 2007. #2 · Jul 6, 2011. I would not recommend a Muncie M22 or M21 for any street driven or drag race car. It's simply not the right gear ratios for anything but road racing. The 2.20 low gear is just not low enough. If you want a 4 speed, get a Muncie M20 with a 2.52 low gear ratio.

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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…

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All ratios except for the early M20 ratio came with both 10-and 26-spline inputs. The early M20 with the 24-tooth input only came in 10-spline. Muncies with 26-spline inputs and 32-spline output shafts came as M20, M21, and M22 transmissions. Before 1969, only M22 transmissions had drain plugs. From 1969 to 1974 all-ratio Muncies came with ...

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The graph will look more "even" like the M22 with the M22W gear set instead of the M20. The M22W ratios are not the same as the M20. The 2.20 first gear is going to be harder on the clutch than a deeper first. If this was just a street car, the standard M22 and 4.10 combo would work great.

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The GM M22 gears came in Close Ratio (2.20) only. The Italian Aftermarket M22 gears come in Close (2.20) with 10 or 26 Spline Input (clutch gears) and Wide (2.56) in 10 or …

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The Saginaw 4-speed transmission was also used and shown for "M20 PROD V-8 ENG & R.P.O. Gear ratios are the same as the close-ratio M21. From $138.45 . New Muncie M22 2.20 close ratio, 2.52 wide ratio, or NEW 2.98 'Z' Ratio Rockcrusher gear set is availabe with either a 10 or 26 spline input.

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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.

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Muncie M22 10 Spline Input Close Ratio Gear Kit, GKM22 Ratio 2.20 Rock Crusher Gear Kit Fits GM Cars 1963-1974 with the Muncie 4 Speed Fits all Muncie Transmission with …

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Since the original M-22 was ONLY available in the close ratio version, there is NOW an M-22W. This M-22W version is simply a wide ratio version (thus the W) of the M-22. Since the M-22 was only a close ratio tranny, it was usually only available, and more compatable, with the lower ratio rearend gears such as 3.70, 4.10, etc.

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What year trans?The earlier 20s were weaker w/a 7/8s shaft(63-69),compared to the 1 inch shaft of the 21s.All were 10 spline,even the 22 in 68/69.In late 70 all three went to 26 spine until the end of the run in late 74.

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The Muncie Miracle: Getting to know Chevy's most legendary four-speed transmission. 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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searching craigslist i came upon this M20.. here is the description.. this trans is out of a 1972 sschevelle w/a 402ci/330hp engine originally.it is a wide ratio trans w/a 2.52 1st gear,1.88 2nd,1.34 3rd,&1.1 4th.there are 2 grooves cut into the input shaft from factory.it has a 26 spline input shaft&a 32 spline output shaft.it has the fine ...

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NEW Muncie M22 SUPER ROCK CRUSHER 4 speed $2899.00. View Images. Price: No Price: Sale Price: No Price: Availability: ... M22 (CLOSE RATIO OR WIDE RATIO AND ULTRA WIDE RATIO) (10 OR 26 SPLINE INPUT) (27 OR 32 SPLINE OUTPUT) ...

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The 400 has plenty of torque to get the 2.56 and 2.73 rolling with virtually no clutch slippage. The end result is essentially a 7:1 ratio, less than ideal, but not a problem. Back in the day, a 454 car COULD be ordered with an M21 or M22 (2.20 1st gear) and a 3.31 rear. The ratio was 7.28:1.

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Just three types of Muncie 4-speeds are available based on the RPO (regular production option) code used when a car was ordered: the M20 (standard wide-ratio), M21 (close …

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The M22 to come later in 1967-'74 is also a close-ratio unit, but much stronger than the M21, with a higher torque capacity. Because the Muncie has so much …

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In 1966, when the M-22 became widely avaliable, it was mostly used behind the high horsepower big-blocks. M-21's & M-22's are both close ratio, M-20 is wide. Even though the M-20 has a lower first gear than an M-21, the main difference you'll really notice while driving, is the RPM drop between 3rd and 4th gear.

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Heathsville, ia. Aug 7, 2022. . M22 Muncie, with all new gears, new synchro's, new slider's, new forks, new bearings and seals. Close ratio,fresh build ready …

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Please note that there are 7 different Muncie input shafts. All 26 spline inputs came with 32 spline output shafts and all 10 spline inputs came with 27 spline output shafts. A common mistake is thinking that all "fine spline" (26 spline) input shafts are M22 heavy duty types. ... M22 1965-72 close ratio. 17 19 22 27. Muncie 4-speed Aluminum ...

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Professionally Built Muncie M22 Rock Crusher 4 Speed Close Ratio 2.20 New Gears. Opens in a new window or tab. Remanufactured. ... AutoGear Italian 1966-1974 Muncie M20 2.52:1 4 Speed 1" 10 Spline Gearset "New" Opens in a new window or tab. Pre-Owned. $799.95. jodystransmissionsllc (814) . or Best Offer.

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4656 posts · Joined 2017. #7 · Oct 10, 2020. In my opinion the super T10 is stronger than a wide ratio muncie weaker than a close ratio non m22 muncie definitely weaker than a m22 but a good box for decent power heavy street car without a ton of power. My last 4 speed was my 70 monte carlo before the switch to LS & auto.

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You must select whether you need a wide or close ratio & which input spline count, 10 or 26. Fits all Muncie applications with 1" countershaft pin, 1966-74. Includes 1st gear, 2nd …

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close ratio cluster gear for Muncie M22 transmissions. From $169.00. The Gear Box is your online store for Muncie Parts including complete DIY Super Muncie overhaul kits, …

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Driveline math for you to compare the NEW M22Z gearset. M22 = 2,20:1 1st gear. M22Z = 2.98:1 1st gear. Using a baseline of an M22 with a 4.10:1 differential, the first gear take would feel the same if you had an M22Z and a 3.08:1 differential. So, you could have a M22Z with a 3.08:1 differential but, your vehicle would have the take off feel of ...

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