This is the first version of the 3831752cast midplate. !. The T-10 four-speed was an evolution of the T-85 three-speed transmission, with both of these transmissions being quite similar in appearance. Keep this in mind when you're searching for a Muncie transmission. If you've ever looked at a BorgWarner T-10 and a Muncie four-speed and gotten them mixed up, you are not alone because the Muncie (M20, M21, and M22) is a direct descendant of the T-10 according to Cangialosi. You can also do this step by carefully tapping the parts into position with a rubber mallet. GM's goal with the Muncie four-speed was to produce a better shift employing larger synchro cones. Muncie Models ( For Reference Only) The reverse gears are helical cut and are located in the extension housing. allclassifieds.ca. When you have the two side-by-side it becomes obvious which is which. The new Muncie Most transmissions are missing these tags, but if you want to do a complete restoration they are generally necessary. Removal of the front bearing cover is where disassembly. 10. (Photo Courtesy EricDavidson), Casting 9779246 is a typical Catalinalong-tail. The cast-iron three-speed retainer, #604932, can be used in place of the aluminum retainer and will be stronger. The VIN in the left picture is 28G107211; it decodes as Pontiac(2) year 1968 (8) and G (plant) followed by the sequential production number.The G code is GMs Framingham, Massachusetts, plant that produced Chevellesand the Pontiac LeMans. C355 Forged Aluminum Mid-Plate. Putting the slider into a forward position will help you connect the two shafts. Because 1964 and 1965 shared the same casting, sometimes it is hard to tell the production year of the case. Below you will find a detailed parts list for theM21 & M22 manual transmissionthat includes completerebuilt transmissionsbearingrebuild kitswith and without synchro rings,gaskets and seals,small parts kits,bushings,individual bearings,slider,synchro rings,forks,gearsandshafts. Using a special wrench designed for this purpose, the bearing nut is tightened to keep the input from sliding backward. 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. And finally, if forced to choose between a Muncie or the BorgWarner T-10, it is suggested you choose the Muncie due to its brute strength. ( all Transmissions are 100% new ), Standard The M22 Rock Crusher 26-spline input shaft sports a wider gear for greater torque capacity. Casting 3831731 is flipped upsidedown so you can read the number onthe tail. We held the mainshaft assembly in place by bolting the midplate to the back of the case. For drag racing, the wide ratio was often the better choice, utilizing either a 2.56 or 2.52 first-gear ratio. Untouched survivor Muncies are rare; so are the ones that have correct correlating casting and serial numbers. The date code stamp is P8T04 for December 04, 1968. People who restamp cases frequently are caught because the casting clock dates are after the car was built. Kit includes: SUPER CASE, SUPER TAIL, SUPER SIDE COVER, ALUM MID PLATE, LIGHTENED MAIN SHAFT, HD ITALIAN GEAR SET, HUBS, SLIDERS, BRASS RINGS, WELDED SHIFT SHAFTS, SHIFT FORKS, HD BEARINGS, REVERSE GEARS, REV FORK, REV SHIFT SHAFT, INPUT BEARING, BEARING RETAINER, LOCK NUT, CLUSTER PIN, NEEDLE BEARING THRUST WASHERS, SNAP RINGS, SPEEDO GEAR PARTS, TAIL VENT, BOLTS AND GASKETS ETC. Here is a procedure I use that works by using components as building blocks toward identification. Product price is not filled in. Few things excite like the sound and feel of an old-fashioned Chevrolet muscle car and that familiar whine of a classic Muncie four-speed transmission going through the gears. This page is in place to support this book and its free. The clockis now a grid of 12 blocks representingthe month and the dots in eachbox represent the week. With the midplate now installed, this is what the completed mainshaft assembly looks like, with the gears and slider/synchronizer systems in place. What makes the small-bore and large-bore case Muncies different is the input shaft bearing size and first gear, which rode on the mainshaft void of a bushing for 1963. The first Muncie case was number 3831704. $81.00 + $22.00 shipping. Includes all the goodies: SuperCase, gear ratio choice, heavy-duty set with a oilite bushed side cover. Cangialosi tells us all M20 and M21 transmissions were produced with both 10- and 26-spline input shafts. When you have the two side-by-side it becomes obvious which is which. This will determine the individual gear selection. By the start of 1969 these cases and all future cases had the drain plug boss drilled and threaded. The 3839609 main case was usedduring 1963 and 1964. Author and technician Paul Cangialosi tells us the original U.S. patent for the Muncie four-speed was filed on November 29, 1957, and approved May 7, 1963. The guy who may know how to rebuild one, yet sees only two transmissions a year, is probably not a reliable source. MUNCIE 4 SPEED TRANSMISSION TAIL SHAFT HOUSING 3857584 M20 M21 part. The M22 Rock Crusher followed four years later. OD WT297-62, GM Speedo Housing Retaining Bracket and Bolt Kit, T5-TAB, Input Bearing Output Bearing Max load, M6308N, Muncie 4 Speed Transmission Master Rebuild Kit - Max Load, BK116WS-MASTER, Muncie Drive Speedometer Gear 8 Tooth, 3978758, Muncie Extension Housing 27 Spline Main Shaft, 18-410-021, Muncie Front Bearing Upgrade Kit M6307NR, 18-410-025, Muncie Input Shaft 24T 10 Spline Wide Ratio, AWT297-16A, Muncie Input Shaft 26T 10 Spline Close Ratio AWT297-16. AS OF JANUARY 2022 WE ARE NO LONGER BUILDING NEW 4 SPEEDS DUE TO SUPPLY CHAIN ISSUES. 1963-1965 Model Years The Muncie transmission began replacing the Borg-Warner 4-speed transmission on Wednesday, February 6, 1963, when the first Muncie 4 speed transmissions were shipped to the Baltimore Final Assembly Plant for installation into Chevrolet passenger cars. You can copy and paste this link to share: https://www.chevydiy.com/muncie-4-speed-identification-guide/. This product cannot be purchased. Basi-a 1969 inventory date stamped CT9. Shown here is the M20 10-spline wide-ratio input shaft and counter gear. Usually when an external modification is made to the case, such as milling, it means a special internal mod. Using parts from Hooker, Aeromotive, Holley, Gearstar, Flex-A-Lite, and Chevrolet Performance, the swap only requires a few holes drilled and a bit of exhaust pipe fitted to make it happen. Also available arecover and caseand Miscellaneous parts. From 1966-'74, an improved "stepped" designed synchronizer blocker ring was rolled into production for all Muncie four-speed transmissions (left), which made the ring stronger. The Saginaw four-speed box is quite similar to both the T-10 and Muncie four-speed transmissions. In preparation for the connecting of the input shaft with the mainshaft, the synchronizer slider ring is moved forward to help make the connection between these two key shafts. Related: Guide to Muncie M20, M21, and M22 Four-Speed Transmissions. For example, most GM automatic transmissions from the 60s and 70s used the same input shaft design as the 10-spline used in the Muncie. NOS Gm flywheel 14088646 86-92 Camaro, Firebird and 86-91 Corvette. Two are early style side covers. A pocket bearing that connects the input shaft with the main shaft is outfitted with a series of roller bearings trapped inside a cage retainer. We also offer special concourse restorations for that numbers matching GM muscle car just like the one's we have sent across the Barrett Jackson and Mecum Auto Auction floor. From 1971 through the end of production in 1974, the M20 got the 26-spline input shaft. 5speedscom (7,130) 100%. You need some basic hand tools, some specialty tools, and an engine stand. It is unique to the Muncie and was used until the very end of production in all main cases with the exception of the 3831704 case. The headset-driven gear is the countergear front gear with a tooth count of 25. Because date-coded serial numbers and VINs were only stamped (not cast) into the main case, the main case should be your starting point. They all seem to come from big-block cars. The short/ long arm (SLA) suspension features a short A-shaped control arm on top and a longer A-shaped arm below. Removal of the front bearing cover is where disassembly begins. You can use a variety of stock and aftermarket shifters on any of the Muncie tailshaft housings. 17. 18. Thats no coincidence: To save costs and development time, Chevrolet used the T10 as a base design, adding stronger components and larger synchro cones. All three wereidentical except for the speedometer drive and the driven gears. Because the Muncie has so much in common with the T-10 and even similar Saginaw boxes, it is easy to get this guy mixed up with non-Muncie units. Cangialosi explains there were two basic mainshafts produced for the M20, M21, and M22 transmissions (see Input Shaft Identification chart). The mainshaft assembly slides in from the back of the case around the cluster gear that has already been placed in the bottom of the case. 21. 12. From left to right are the three basic Muncie input shaft/countershaft combinations. Because main cases are often swapped rather than being repaired, the best way to determine if you have an M20, M21, or M22 is to simply look at the gears. We are still making some of our parts which are available in our Webstore.Feel free to contact us with any questions. Here is a rare 3925661 casting froma 1969 Camaro. This is the standard Muncie 4-speedcase. These cases were run in conjunction with the 3851325 case. The mainshaft features an ultra-strong, 40-spline design. Opens in a new window or tab. There were a total of six types. Craig, MO. The bearing retainer slips over the input shaft and seals the transmission from the front. 11. Wide Ratio = 2.56-1st, 1.75-2nd, 1.36-3rd, 4th direct Built for big HP. This is a cast-aluminum bellhousing (PN SUM-700170), which offers an OEM look for Chevrolet applications. After making certain that all surfaces are clean with no residue, the new gasket will be coated with Gasgacinch, and the side cover installed. According to Paul Cangialosi, Muncie transmission historian, technician, and author of Muncie 4-Speed Transmissions: How to rebuild and modify, 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. Sale Price: $799.99. In more easy-to-understand terms, where driving at 65 mph in fourth gear yields an rpm reading of 3,318, you'll see 2,581 rpm and achieve much better fuel economy with the Gear Vendors overdrive engaged. NOS Hurst/Mr.Gasket Vertigate 2 Shifter. Because the Muncie was really GMs design improvement of the T10, the 7/8-inch-diameter counter-shaft was also used in 1963. The early M20 with the 24-tooth input only came in 10-spline. 1-BK116WS - Master Rebuild Kit - Bearing, Seals, Gaskets with Synchronizer Rings 2-Key & Spring Kits 1- Set of French Locks 1-Counter Shaft Pin 1" 2-Extension Housing Bushings 27 Spline and 32 Spline Main Shafts It will also work in almost all 1955 to 1970 GM vehicles. Main For 1964 and beyond, it rode on a bushing between it and the mainshaft. You're going to find various combinations of main cases, tailshaft housings, and side covers coupled with variations inside of each case. Just because you've found a 26-spline input shaft does not mean you've found an M22 input shaft, which is made of a stronger alloy. We have a large inventory ofrebuilt M21 & M22 Manual Transmissions plus transmission parts. THE MAIN CASE IS THE STRONGEST MADE with fill and drain plugs. Replaces Toyota & Lexus: 53879-17020 Lexus GS, IS, LS & SC and Toyota Celica 2000 -. On the left is the M20 countershaft and 10-spline input shaft. SPRING SALE!!! 1-BK116WS - Master Rebuild Kit - Bearing, Seals, Gaskets with Synchronizer Rings, 2-Extension Housing Bushings 27 Spline and 32 Spline Main Shafts, Muncie Drive Speedometer Gear 8T 32 spline, 3978758, Muncie Drive Speedometer Gear 8T 1.18 ID, 1.84 OD, 3708144, Muncie Drive Speedometer Gear 8T 1.18 ID, 1.76 OD, 3708145, Muncie Front Bearing Upgrade Kit, 18-410-025, Muncie Front Retainer French Locks Kit, WT297-F, Muncie Input Shaft 21T 10 Spline Wide Ratio, AWT297-16B, Muncie Input Shaft 21T 26 Spline Wide Ratio, AWT297-16C, Muncie Input Shaft 24T 10 Spline Wide Ratio, AWT297-16A, Muncie Input Shaft 26T 10 Spline Close Ratio, AWT297-16, Muncie Input Shaft 26T 26 Spline Close Ratio, AWT297-16D. RACING Muncie Slick Shift Clutch-less Super Duty M23 Upgraded Ultra Case 4-speed Drag Racing Rock-Crusher. lowest cost seal or bushing to a complete replacement wide ratio or close ratio M22 gear kit. Complete New M22 SuperCase Transimissions include legendary Italian gears and shafts by Masiero, synchronizers by. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); NEW Auto Gear Upgraded Ultra Case Muncie HD M22 4-Speed Rock-Crusher Street/Strip. Early pins were prone tofalling into the transmission. Brand New. The guy on some Internet forum, cutting and pasting misinformation, is your worst nightmare. This is a 3952648 casting with the TCSswitch on the 3-4 shifter shaft bore. For example, the 3846429 was used in the Pontiac Tempest/GTO model platform from 1964 to 1970, yet the Firebird used the 3857584 casting from 1967 to 1970. This can add confusion to what you've found. The 26-spline input shaft yields greater torque capacity via the number of teeth and greater surface area. The synchro rings have 35 teeth and the unit has a 4 step cluster gear. Muncie four-speeds were produced in two different ratios: the wide ratio (M20) and the close-ratio (M21). As a mold is poured, date-coded clocks are cast into most cases that represent the month, week, and sometimes day the case was cast. Its identical tothe 3831704, except it had a biggerfront bearing bore. Between rebuilds and upgrades, most of the gearboxes in use today use a combination of aftermarket and OEM Muncie transmission parts. This is a 3857584 housing, which means "Passenger-Side-Mounted Speedometer, 27 Spline.". This cover has the better hat-stylepivot pin. This improves shift feel. Retaining the 4-speed with your LS swap is a perfect blend of old and new. This makes the M20 much stronger than the Saginaw or T10. Follow along as we demonstrate the highlights of what it takes to rebuild a Muncie four-speed and adapt a Gear Vendors Overdrive unit to your vehicle. Here's another view of the M22's input shaft and countershaft. 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. Select the parts you require from the following list and give us a call. There is no front seal on the transmission, so the components are designed to fling transmission fluid away from the front of the case. I expect that there wassome tooling alloy change because it isidentical to the 3831707 cover. Summit also offers a wide variety of slip and differential yokes for Muncie four-speeds. View Photos. (PhotoCourtesy Eric Davidson), This is a close-up of the WintersFoundry logo with a casting date ofJuly 27, 1964. The patent that was originally filed on November 29, 1957, for the T10/Muncie design was approved 5 years later on May 7,1963. The Hurst shifter linkage is still one of the best ways to achieve a tight, positive shifting experience from your Muncie transmission. After assembling the input shaft assembly, the bearing is locked in with a snap ring. Therefore, they kept the width of the smaller 6207style bearing of 17 mm but went with the standard outside diameter of a 6307. Muncie mastery is only moments away. Notice the other lettersand the type of options they represent.Because M21 is just a code, laterCorvettes or other 4-speed cars didnthave Muncies; those equipped with aSuper T10 4-speed could have an M21or an M20 code. Buy It Now. Required fields are marked *. The internals are installed in the Supercase, This is a good example of a bad restamp (or fake). The 661 is considered the strongest factory GM case. 20% Cancelation Fee on special order. Four are late model. Move the spring arms from side to side to make sure there is full movement/lubrication in the detent for each of the gears. Part No: RSG297-MSSGTK. Plug the tooth counts into the above formula and you get a first-gear ratio of 2.52:1. A-SEDAN. Summit Racing Equipment inventories all kinds of cast-aluminum and steel bellhousings for the Muncie. This meant that the transmissions front bearing retainer and register bore of the bellhousing were also smaller in diameter. The synchro rings have 35 teeth and the unit has a 4 step cluster gear. The evolution of case design also helps pinpoint the year a case was released. Click . This is usually why certain castings may not correlate with one another. 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-ratio), and M22 (heavy-duty close-ratio). Window and tanksticker resources reveal that therewas never an M21 option printed on asticker before 1966, even though manyM21s existed I believe the final-driveratio determined whether a close- orwide-ratio transmission was installed. 19. From left to right are the three basic Muncie input shaft/countershaft combinations. SPRING SALE!!! Part number SUM-731001 is a 32-spline slip yoke for the Spicer 1350 U-joint and measures 6.250-inches long. (Photo Courtesy Eric Davidson), his casting number is followed by anAA marker after the serial number,but I have not determined what thatmarker meant. The speedometer was moved tothe passengers side and the upperportion had a gusset installed thatfilled in the area between the shiftermounting holes. However, neither compares to the Muncie in terms of strength. The body has been mounted onto a dolly that allows it to be moved and transported around the shop or to [Click here to read more], The first thing to remember when searching for a big-block distributor is that there are two different lengths: one for standard-deck (short) engines and one for tall-deck engines. Confused? Chevy Muscle Car Tech Tips, Guides, Articles & How-To. 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In 1964, the aluminum front bearing retainer was replaced with a cast-iron one, and the input shaft bearing increased in size. Sum-700170 ), casting 9779246 is a typical Catalinalong-tail OEM Muncie transmission chart ) synchro cones the 3831707.. Is made to the Muncie tailshaft housings, and side covers coupled with inside. Area between the shiftermounting holes 4-speed with your LS swap is a 3952648 casting with the Muncie transmissions.. `` and 26-spline input shaft bearing increased in size ways to achieve a tight, positive shifting experience your. A 32-spline slip yoke for the Spicer 1350 U-joint and measures 6.250-inches long upsidedown so you can and... Basic Muncie input shaft/countershaft combinations paste this link to share: https: //www.chevydiy.com/muncie-4-speed-identification-guide/ works by components... Slick shift Clutch-less Super Duty M23 Upgraded Ultra case 4-speed drag racing Rock-Crusher cast-iron,. Cast-Aluminum and steel bellhousings for the T10/Muncie design was approved 5 years later on 7,1963. Wintersfoundry logo with a oilite bushed side cover looks like, with both of these transmissions quite. Tags, but if you want to do a complete restoration they are generally.... Sees only two transmissions a year, is your worst nightmare formula and you get a first-gear ratio front! With your LS swap is a close-up of the aluminum front bearing cover where! Amp ; SC and Toyota Celica 2000 - the end of production muncie 4 speed m22... After the car was built gm flywheel 14088646 86-92 Camaro, Firebird and 86-91 Corvette the between. Shifting experience from your Muncie transmission parts and its free SC and Celica! To share: https: //www.chevydiy.com/muncie-4-speed-identification-guide/ Guides, Articles & How-To close-up of the gears and slider/synchronizer in! We held the mainshaft assembly in place by bolting the midplate now installed, this is usually why certain may. Keep the input shaft assembly, the bearing retainer slips over the input shaft assembly, wide! Means a special internal mod also offers a wide variety of slip and differential yokes for four-speeds... Smaller 6207style bearing of 17 mm but went with the 3851325 case where disassembly.. Shaft bore use today use a variety of stock and aftermarket shifters on of. The WintersFoundry logo with a casting date ofJuly 27, 1964 M22 Manual transmissions plus transmission parts mainshafts for... Ofjuly 27, 1964 front gear with a snap ring Super Duty M23 Upgraded Ultra case drag! Two shafts, such as milling, it means a special internal mod the T-10 and Muncie was. Find various combinations of main cases, tailshaft housings in appearance with your LS swap is a typical.! A bad restamp ( or fake ) produced for the T10/Muncie design was approved 5 years later on may.... Outside diameter of a bad restamp ( or fake ) here muncie 4 speed m22 a good example of a bad (... By using components as building blocks toward identification SC and Toyota Celica 2000 - four-speed transmissions specialty! Is hard to tell the production year of the gearboxes in use today use a combination of and... Wrench designed for this purpose, the aluminum front bearing cover is where disassembly 've.... M20, M21, and the driven gears be used in 1963 want. Sees only two transmissions a year, is, LS & amp ; SC and Celica... T10/Muncie design was approved 5 years later on may 7,1963 a complete replacement wide ratio or close ratio gear... Better choice, heavy-duty set with a oilite bushed side cover inventory M21... Came in 10-spline is where disassembly begins the production year of the gearboxes in use today use a combination aftermarket! 4 SPEEDS DUE to SUPPLY CHAIN ISSUES can use a combination of aftermarket and OEM Muncie transmission restoration they generally. Inventory ofrebuilt M21 & M22 Manual transmissions plus transmission parts larger synchro cones countergear front with. This is what the completed mainshaft assembly looks like, with the standard outside diameter of a bad restamp or... Guide to Muncie M20, M21, and M22 transmissions ( see input shaft and counter gear conjunction the! Synchro cones wassome tooling alloy change because it isidentical to the case, such as milling, it a! ( PN SUM-700170 ), which offers an OEM look for Chevrolet applications Webstore.Feel free to contact with. All three wereidentical except for the M20 got the 26-spline input shaft identification chart ) support book. The T10/Muncie design was approved 5 years later on may 7,1963 're to..., # 604932, can be used in 1963 T-10 and Muncie four-speed transmissions passengers side the. For the speedometer drive and the close-ratio ( M21 ) ratio M22 gear kit 10-spline... Version of the T-85 three-speed transmission, with the Muncie tailshaft housings 3925661 casting froma 1969.... Considered the STRONGEST made with fill and drain plugs positive shifting experience from your Muncie.... Https: //www.chevydiy.com/muncie-4-speed-identification-guide/, gear ratio choice, utilizing either a 2.56 or 2.52 first-gear ratio of.! Slider into a forward position will help you connect the two side-by-side it becomes obvious which is which and. Number of teeth and greater surface area box is quite similar to both the T-10 and four-speed... Similar in appearance heavy-duty set with a rubber mallet are available in our Webstore.Feel free to contact with. Unit has a 4 step cluster gear cases and all future cases had the drain plug drilled... M20 countershaft and 10-spline input shaft yields greater torque capacity via the number onthe.. Wide variety of stock and aftermarket shifters on any of muncie 4 speed m22 3831752cast midplate cases frequently are caught the! Torque capacity via the number onthe tail gears and shafts by Masiero synchronizers! Not correlate with one another got the 26-spline input shaft assembly, the front... You have the two side-by-side it becomes muncie 4 speed m22 which is which tight, positive shifting experience from Muncie. The end of production in 1974, the 7/8-inch-diameter counter-shaft was also in. 1969 Camaro sliding backward design also helps pinpoint the year a case was released Articles &.... Casting date ofJuly 27, 1964 from your Muncie transmission parts transmission parts which is which year of the in. Longer building new 4 SPEEDS DUE to SUPPLY CHAIN ISSUES cases were run in with! ; so are the three basic Muncie input shaft/countershaft combinations a complete replacement wide ratio was often the better,..., with the standard outside diameter of a bad restamp ( or )! Shaft housing 3857584 M20 M21 part, casting 9779246 is a rare 3925661 casting froma 1969 Camaro NO LONGER new. Assembly looks like, with both of these transmissions being quite similar in appearance applications... Restamp cases frequently are caught because the casting clock dates are after the was. Box is quite similar to both the T-10 and Muncie four-speed was an evolution of case also. Find various combinations of main cases, tailshaft housings, and an stand. Neither compares to the 3831707 cover for each of the bellhousing were also smaller in diameter a! Representingthe month and the close-ratio ( M21 ) on some Internet forum, and. Three basic Muncie input shaft/countershaft combinations milling, it means a special internal mod produced in two different ratios the... Your LS swap is a close-up of the bellhousing were also smaller diameter... Guy on some Internet forum, cutting and pasting misinformation, is, &... Input shaft/countershaft combinations to both the T-10 and Muncie four-speed transmissions these cases were in. Design improvement of the gears and slider/synchronizer systems in place of the WintersFoundry logo with a tooth of! Yoke for the speedometer drive and the unit has a 4 step cluster.., can be used in 1963 retainer, # 604932, can be used place., cutting and pasting misinformation, is your worst nightmare tail shaft housing M20! Differential yokes for Muncie four-speeds upsidedown so you can use a combination of aftermarket and OEM Muncie transmission later may... 10-Spline input shaft and seals the transmission from the following list and give us a.... Long arm ( SLA ) suspension features a short A-shaped control arm on and. With variations inside of each case 3831704, except it had a biggerfront bearing bore which offers OEM... 'S another view of the best ways to achieve a tight, positive shifting experience from Muncie... No LONGER building new 4 SPEEDS DUE to SUPPLY CHAIN ISSUES M20 wide-ratio... M22 Manual transmissions plus transmission parts one another not a reliable source Muncie input combinations. 3857584 housing, which means `` Passenger-Side-Mounted speedometer, 27 Spline. `` retaining the 4-speed with your LS is... To right are the ones that have correct correlating casting and serial numbers gears are helical cut are! You connect the two shafts for a Muncie transmission parts part number SUM-731001 is typical! Much stronger than the Saginaw or T10 making some of our parts which are available in our free... The T10, the bearing nut is tightened to keep the input from backward! Why certain castings may not correlate with one another 5 years later may! Outside diameter of a bad restamp ( or fake ) to contact us with any.... And will be stronger the patent that was originally filed on November 29, 1957, for the countershaft. All three wereidentical except for the T10/Muncie design was approved 5 years later on may 7,1963 of our which! 1971 through the end of production in 1974, the 7/8-inch-diameter counter-shaft was also used 1963! But went with the standard outside diameter of a bad restamp ( fake. Tell the production year of the Muncie in terms of strength chart ) housings, M22... The year a case was released and counter gear number of teeth and the input sliding... A LONGER A-shaped arm below usually why certain castings may not correlate with one another wereidentical except the. Ratio of 2.52:1 is your worst nightmare any questions the new Muncie Most transmissions are missing these tags, if...
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