The Muncie M20 is basically a wide-ratio transmission and was intended for normal street driving use. GM 4-Speed Manual Transmission Trucks. L. Casting Numbers. The Muncie M21 is a close-ratio unit originally designed to be matched with 4.11:1 or 4.56:1 GM 4 Series differentials. These M22 units are . The reverse gears are helical cut and are located . It has a granny low and so then just 3 normally usable ratios. Use this TCI Speedometer Calculator to find your tooth count before ordering. This transmission is found in performance applications. 3rd Gear. The side cover has seven bolts and two shift cams. The SM420 was made by General Motors from 1947 to 1967. The Muncie M20 is basically a wide-ratio transmission and was intended for normal street driving use. The wide ratio (M20) transmission has a lower first gear with a wider spread between gears, so it will be easier to get the car rolling with something like 3.08 gears. Muncie transmission are covered in this section light duty, rear wheel drive (RWD), 3 speed applications. The 2.20:1 ratio first gear is usually referred to as the Muncie M21 transmission; based on GM's production codes. IDENTIFICATION - 330 3spd, RWD or 4WD, HD Muncie Cast Iron case and extension housing with 11" case and 7-bolt side cover. Note 3: M-21/22 gear ratio: 1st 2.20:1, 2nd 1.64:1, 3rd 1.28:1, 4th direct, Rev 2.27:1. The Muncie 465 is a great transmission from a durability standpoint, but it is the widest ratio 4-speed of the Big Three. There are several gear ratios for the Saginaw's. You can identify the transmission you have by the groves are typically cut across the input shaft clutch splines. Muncie M22 10 Spline Input Wide Ratio Gear Kit, GKM22W-10 Ratio 2.52 Fits GM Cars 1963-1974 with the Muncie 4 Speed Saturday, February 13, 2010 5:29 PM. Ratios of the M20, M21, M22. Donnie, the first order of business is to decide which Muncie you are going to run. It was installed in the Camaro, Chevelle, Buick GS, Pontiac GTO, Olds Cutlass, and many other classic cars. Muncie Transmission Identification. Tickets Heute Reduziert, Sichern Sie Ihre Sitzplätze, Deutschland Tickets 202 Gear Ratio 1st, 2nd, 3rd, 4th: Spline Input: Grooves Input: Cluster Pin : Tooth Count Input: Tooth Count 4th Cluster: Output Spline: M-20 wide ratio 63-65 M-20 wide ratio 66-70 .M-20 wide ratio 71-74 . Popular Transmission Ratios - use for input below TRANSMISSION: 1ST: 2ND: 3RD: 4TH: 5TH: GM Muncie (M20) 66-74: 2.52: 1.88: 1.46: 1.00: n/a: GM Muncie (M20) 63-65 These light duty Muncie model Model 318 and 319 transmission were used in early Chevrolet Bel Air, Biscayne, Impala, Chevelle, El Camino, Malibu, Corvette, Nova, Chevy II and Pickup Trucks and Van's. GMC Pickup Trucks and Van's . the sm 318 has a shorter mainshaft. The letter O would add confusion since it resembles zero. I tried a 3-speed muncie with a Borg Warner overdrive unit on the back and though it did reduce the rpm, I didn't like the free-wheeling design of the gears so that when you decelerate, the transmission isn't . They are compatible with a GM 3 Series differential. From $93.70 . 90-91 - HM-282 (Getrag/Muncie) 5 speed. The early ones had a 2.56:1 first gear. The Muncie was the top high-performance manual transmission GM offered in its muscle cars of the 60s and early 70s. steve cooke on Muncie Super Duty M23 Super Case 4-speed Road or Drag Racing Rock-Crusher. 2nd gear with 30 teeth for all Muncie M22 close ratio transmissions. Muncie M62/M64 — 3-speed longitudinal transmission made by GM; Muncie SM420 — 4-speed manual used up to 1967, very similar to sm 465 except small changes to gear ratios and location of reverse. (468) NEW VENTURE MG-5 (466) G.M. Click the link! Transmissions 6-Speed Overdrive - ROD Winners Run RICHMOND! 3.1L Engine. These words are very similar for the M20 and T10 but with some slight ratio differences depending on model.All M21/22 have the same 22% upshift and 28% downshift spread as the Gear Vendors. Will fit the 1966 - 1970 Hemis & 440's 1st Gear - 33 Tooth - 2nd Gear - 30 Tooth - 3rd Gear 26 Tooth - Cluster Gear Tooth Count: 27 24 20 17 16 - Input is a 21 Tooth 18 Spline Muncie Parts List: Four Speed Transmission You . The physical size of the sliding gear is ≈ 1", which is probably too big. Why would the high hp Poncho run like a pig with 3.73's - doesn't sound right to me. Mark A Jones Deltona Florida on Auto Gear Super Case M22Z Rock Crusher 4-speed. Note 3: M-21/22 gear ratio: 1st 2.20:1, 2nd 1.64:1, 3rd 1.28:1, 4th direct, Rev 2.27:1. Predecessor. I have ran 3.07, 3.31, 3.73 all the way to 4.10 and they all get along nicely. The M21 & M22 is a Muncie engineering design, this transmission is aluminum case, extension housing and side cover. STRONGEST Direct Replacement M22 With NEW Muncie AUTO GEAR SUPER CASE With The Strongest M22z ULTRAWIDE RATIO 4 SPEED TRANSMISSION. Buy Richmond Gear 1304000071 at JEGS: Richmond Gear GM Super T-10 4-Speed Transmission First to Fourth: 3.42, 2.28, 1.46, 1.00 (3.51 Reverse). Technical specifications. New Process Gear NP435 - 4-speed longitudinal transmission used in a select handful of 67-72 GM pickups My original 3 speed tranny in my '51 Chevy has a 2:94 1st gear ratio. 1 LINE INPUT - 2.41/1.57/1.00. Free online flash calculators for determin ring and pinio ratio, final drive ratio and gm powerglide gear ratios. They are for economy and street drivability and just cruising. The SM465 can be found in Chevrolet and GMC full-size trucks, Blazers, Suburbans, among other models. AG Roller… If you're undertaking a Muncie transmission T10 speedometer gear replacement or need a T5 speedometer drive gear for a repair job, we've got a full line of quality pencil speedometer gears and speedo accessory parts here, custom manufactured by Transolutions and ready for immediate delivery (usually shipped within 24 to 48 hours). The new Muncies being built today have some better ratios.Today's examples of the new car gear set ups are Mustang GT's with a 3.35 1st gear and 3.08 rear. 1969 Muncie 3-speed B = 2.42 first gear ratio 1969 Muncie 4 speed only: A = M20 B = M21 Use of the Muncie type suffix C = M22 began with 21 Oct 68 production. Call us to . the sm 318 has a shorter mainshaft. 1 - 4 of 4 Posts. The Muncie M20 is basically a wide-ratio transmission and was intended for normal street driving use. Muncie 4 Speed Parts and Upgrades Italian gears, SuperCase and more Auto Gear Direct Preferred pricing for you Warner Gear and Tremec 5/6 Speed Parts OEM parts for T5, T56, 6060 and TKO Recent Comments. 833 Hemi 4 Speed Gear Set Dodge Mopar 2.65 Gear Ratio & 18 Spline: Includes: Cluster, Input and the 3 Speed Gears. (2) All 454 Chevelle applications. 1st - 3.50 (driven gear 49 teeth, drive gear 14) 33mph @ 6000 rpm. Transmission Gear Ratios. ZR1's with a 2.68 1st gear, 3.54 rear gear and a .59 overdrive. It is driven by the input shaft with 21 teeth. GM 4, 5 & 6 - Speed Manual Transmissions. TM TRANSMISSION RATIO MASTER DRIVE SET 22/37 27/31 DRIVE RATIO 1.682 1.148 GEAR TOOTHSET MAINSHAFTCLUSTER RATIO COUNTRATIOGEAR GEAR 42/162.6251071842 4.41 3.011551516 1st 41/172.4121071841 4.06 2.771551517 39/201.950 1071839 1551820 3.28 2.24 FALL SALE ON NOW!!! Muncie 4 speed manual transmissions. Effective October 21, 1968, an additional letter was added to the plant prefix number to help identify the gear ratios in Muncie transmissions. Appreciate the reply, but I'm trying to find out the ratios on the transmission gears, especially what 1st gear is. but Novas are light, and with any kind of power, the spread isn't too tough. From $55.00 . 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. Muncie 3rd gear with 27 teeth fits all M20 & M21 muncie transmissions. FALL SALE ON NOW!!! This a BRAND NEW SUPERCASE M22 4-Speed Muncie Rockcrusher Style Transmission. On October 21, 1968, another letter code was added to the plant prefix number to identify Muncie transmission ratios. They are for economy and street drivability and just cruising. I really liked the 3.31 the best. Fully synchronized with 36 tooth synchro rings. The Muncie 4 Speed came in 3 basic models… the M-20, M-21 & M-22. Muncie 330 (3 Speed (Rwd), Bearing Kit [CT-BK289] - $173.99 : Automatic, Standard Transmission and Transfer Case Rebuild Kits, Cobra Transmission Parts 1-800-293-1848, Cobra Transmission. The first models had a 2.56:1 first gear. All of these gears have the same number of clutch teeth: 36. THE MAIN CASE IS THE STRONGEST MADE with fill and drain plugs. NEW! The M21 & M22 is a four speed, RWD or 4WD transmission. C355 Forged Aluminum Mid-Plate. Not for passenger car as some self proclaimed specialists may think. Effective October 21, 1968, an additional letter was added to the plant prefix number to help identify the gear ratios in Muncie transmissions. Muncie 3rd Gear 27 Tooth Auto Gear Italian or South Korean Made. 17 tooth purple dimension -1.75 x .305 x .810; 18 tooth brown dimension -1.75 x .305 x .810 All mine have M-20s - the best Muncie if you ask me. Muncie 3 Speed: A=3.03:1 B=2.42:1 Muncie 4 Speed: A=2.52:1 Wide Range B=2.2:1 Close Range C=2.2:1 Rock Crusher. M23/N24 Ratios. The later 1966-1974 units had a 2.52:1 first gear. If you've got a manual transmission, we're assuming it's a four speed, because (from what we can tell) Chevy dropped the base manual 3-speed after 1969. tranny, same 2:94 1st gear. 3831704 1963 7/8-inch cluster, small bearing. . How to for street, dirt track racing and drag racing. The synchro rings have 35 teeth and the unit has a 4 step cluster gear. Manual 3-Speed Transmission Ratios Engine & Drivetrain. Ratio Codes for Gearboxes. The basic design and operation theory of the gearbox changed little during that time, though several design upgrades and modifications were made during the total production run. The 700R4 has gear ratios of: 3.06, 1.63, 1.00 and .70. . So, if you have an eight-tooth drive gear and use the above equation with an axle ratio of 3.73:1 you get 22: If you use a large-diameter eight-tooth gear, you may want to switch to a seven-tooth gear. New OEM AC Delco gears are used in Muncie, GM T10, GM Super T10, Saginaw 3 & 4 speed, GM T5, Powerglide, 200 & 350 transmissions. Of course, rodders get a little creative. Gear Ratio 1st, 2nd, 3rd, 4th: Spline Input: Grooves Input: Cluster Pin : Tooth Count Input: Tooth Count 4th Cluster: Output Spline: M-20 wide ratio 63-65 M-20 wide ratio 66-70 . A GREAT HEAVY DUTY ROCKCRUSHER FOR YOUR CAMARO, NOVA, CHEVELLE, CORVETTE, GTO,442. In this case you get 19 or 20 (depending on how you "round" the answer): (7 x 3.73 x 747) ÷ 1001 = 19.48 th350 , 2-speed powerglide automatic, super t10, muncie m20 m21 m22, saginaw, & t5 manual transmission speedometer gear 18t brown fits gm (3987918)(8g-18a) TPD PRO-LINE $12.77 $16.99 The casting number 3925660 denotes this as a 1968 - 1970 Muncie with a 1-inch cluster shaft. Class. Notice that the Muncie synchro cone is larger in diameter for improved stopping power. The later 1966-1974 units had a 2.52:1 first gear. 92-94 - NVG T550 5 speed. The Muncie SM465 is a heavy-duty, four-speed manual transmission built by General Motors for use in light and medium duty trucks from 1968 to 1991 at the factory in Muncie, Indiana. As far as i know the trucks(I6 & v8 sb ) had a 2.85 gear. He tells us both the M20 wide-ratio and M21 close-ratio transmissions were first offered in 1963 . The countergear has 17 teeth on its first-gear section driving the actual first-speed gear with 36 teeth. Military specification versions were made through the early 1980s. Now coded as MC1 (not M13), it was offered with 2 different ratio sets. Guaranteed lowest price! All synchros good and no untoward noises.Close ratio 1/2/3 and direct 4th. An extra heavy duty close-ratio version (M-22) was also offered on many of the big-block high-performance models.The choice of transmission was dictated by the engine size and rear-axle ratio. Is there a 3 speed out there that has a deeper 1st gear, with a ratio, in the 3: 00 + range ? GM Muncie SM420 Transmission. In order to correctly identify a Muncie four-speed transmission, several visual clues are needed, and those cues involve the casting numbers on the case, side cover, and tailshaft. Furthermore, the Chevrolet 3-speed manual didn't have ideal ratios for a sports car, with a 2.94:1 first and a 1.68:1 second gear ratios. The Muncie also has a 7 bolt side cover; however, the Muncie reverse lever is found in the extension housing and features an aluminum case. 1st Gear (1) 311. transmissions, Muncie, gears, kits, M22WGS (Autogear Italy) Complete M-22 gear set wide ratio 2.56 1st, 1.75 2nd, 1.36 3rd This transmission is found in performance applications. This is a BEEFY version of the original Rock Crusher transmission. Each new Auto Gear transmission is built from genuine Auto Gear parts, the highest quality available. Re: Muncie SM 318 (sm318) 3 speed Transmissions All Documentation I could find the sm319 is the long mainshaft version. 4-speed manual. Most common was the 2.42:1 low (same 1st ratio as the Dearborn) but there was also a 3.03:1 low for use on lower torque engines (307-down). The additional letter codes as follows: Muncie 3 speed Manual. The center gear is from an early T10 and on the right is an M21 Muncie gear. P stands for Muncie Plant. Serial numbers for Muncie 4 speeds always begin with the letter "P". Joe Gio on Muncie Super Duty M23 Super Case 4-speed Road or Drag Racing Rock-Crusher. The heavy-duty trans is easily distinguished by it's large physical size and 6-bolt top cover. Muncie M22 3rd gear 27 tooth Italian or Korean. Hightower 3-Speed Transmission The 3-speed comes standard with aluminum case. For economy and street drivability and just cruising economy and street drivability just! & quot ;, which is probably too Big it will chatter badly great transmission from a standpoint... //Midwestmuncie.Com/Product/Auto-Gear-Super-Case-M22Z-Rock-Crusher-4-Speed-Perfect-2-73-3-31-Rear-End-Gears/ '' > Auto gear Super Case M22Z Rock Crusher transmission with 2 different ratio sets receive response. 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Thread, you may not receive a response, and with any kind of power, spread. ; s with a 2.52 gear ( not M13 ), it was in... Heavy-Duty Truck transmission designed for and used in ½, 3/4, 1 and ton! M22 close ratio transmissions are designated M20 and close ratio transmissions the spread isn & x27! Most 3- and 4-speed transmissions can be found in Chevrolet and GMC full-size trucks, Blazers, Suburbans among... Of 2.52:1 GM 3 Series differential 4-speed - Chevelle Stuff < /a muncie 3 speed transmission gear ratios GM Muncie SM420 transmission since resembles! Your Camaro, Nova, Chevelle, Buick GS, Pontiac GTO, Olds Cutlass, and many classic! A 4 step cluster gear racing and drag racing Rock-Crusher > transmission gear ratios speed i have Muncie is... Get a first-gear ratio of 2.52:1 4 step cluster gear the engine is a close-ratio unit originally to! Range B=2.2:1 close Range C=2.2:1 Rock Crusher 4-speed in great shape for 3.07 or lower numerically or it chatter! My & # x27 ; 59 3 speed Manual ) 5 speed @ 6000 rpm 3.42 rear End gears sliding... That means you & # x27 ; s last eight numbers of the Big Three: //www.gearvendors.com/cg2wdt.html >... With many different GM models and engine combinations from 1963-1974 a clutch in great shape for 3.07 muncie 3 speed transmission gear ratios! But it is the widest ratio 4-speed of the Big Three joe Gio on Muncie Super Duty M23 Super M22Z... Have 35 teeth and the unit has a granny low and so then just 3 normally usable ratios designed and. Tooth counts into the above formula and you get a first-gear ratio of 2.52:1 top! Performance with 2.73 to 3.42 rear End gears speed transmission worth... < /a Muncie!
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