muncie 4 speed m22

Here's another view of the M22's input shaft and countershaft. It was much easier to stockpile Muncie spare parts and cores in the 1970s than it is today. The casting number for the midplate never changed. There are three basic types of Muncies: M20, M21 and M22. Note the single groove, meaning an M21 close-ratio. The casting number depends on the date the service case was installed. Most transmissions are missing these tags, but if you want to do a complete restoration they are generally necessary. The guy who may know how to rebuild one, yet sees only two transmissions a year, is probably not a reliable source. Muncie transmissions also tend to get performance improvements such as a gear ratio change and stronger internal parts. The first Muncie case was number 3831704. Muncie M20 rebuild kits. Tailshaft housings will vary based on original application. For example, the 1965 Corvette close-ratio Muncie had three different tag numbers. The standard 10-spline input shaft found its way into new Muncie M20 and M21 transmissions from 1971-'74. Filed Under: Chevy Tech Tips, Transmissions, Well, youve either purchased an engine to rebuild for your project or your vehicle is equipped with a bigblock that needs a rebuild. Identifying Muncie 4 Speeds II by Paul Cangialosi : Muncie 4 Speed Rebuilding DVD is available now. 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 Every first gear has 36 teeth, second gear has 30 teeth, and third gear has 27 teeth. MUNCIE 4 SPEED TRANSMISSION TAIL SHAFT HOUSING 3857584 M20 M21 part. Jeff and midwest muncie , was a pleasure to deal with . Bumper & Fender Apron Nylon "U" Nut. SHARE THIS ARTICLE:Please feel free to share this article on Facebook, in Forums, or with any Clubs you participate in. Expect to find various combinations out there because these high-performance four-speed transmissions have been thrashed, trashed, and rebuilt through the decades. Muncie T10 Super T10 4 speed and T5 Manual Transmission Parts and complete new transmissions. From left to right are the three basic Muncie input shaft/countershaft combinations. Part No: RSG297-MSSGTK. However, the 1964 plugged, unmachined, or had the 1965 3851325 casting number was switch installed. The 3839609 main case was usedduring 1963 and 1964. This cryo treatment will add 30% in component strength. Guide to Muncie M20, M21, and M22 Four-Speed Transmissions. If you arerebuilding your Muncie and you donot have this type of cover pin, put iton your shopping list. This move from Patent Pending to Patent Number is documented on actual Muncie main case castings. Of course, restorers and rebuilders will tend to re-stamp the date code to suit a particular restoration. SPRING SALE!!! These cases were run in conjunction with the 3851325 case. You can see that theM20 has fewer teeth on the front endthan the other two. A=M20 B=M21, C=M22). Click Image For More Details: Reverse Gear Set Muncie 4 Speed ON SALE NOW. This is the standard Muncie 4-speedcase. On the left is the M20 countershaft, which is easily identified by the larger 29-tooth gear. Cars. Because the Muncie was really GMs design improvement of the T10, the 7/8-inch-diameter counter-shaft was also used in 1963. That the Muncie has much in common with the T-10 is no accident. 4 Speed Muncie. 19. Glean the basics and use them in your research. Wright Connection Speed & Gear: 661.304.1967. Muncie Models ( For Reference Only) This is the second generation of platecasting 3831752. The early production Muncie four-speed case is the small-bore unit and can be identified by the GM casting number 3831704 (see Muncie M20/M21/M22 Main Case Identification chart). Serial numbers for Muncie 4-speeds always begin with the letter P, which stands for Muncie Plant (not passenger car.) M and N were used to identify 3-speed Muncies; O identifies the Saginaw 3-speed with overdrive. It is a later casting design with ers with bolt-on shifter shafts. In contrast, close-ratio transmissions (which use a 2.20:1 first-gearing) reduce the ratio drop between gear changes to carry speed around a course. These guys stockpiled a lot of parts! Date code format for 19631966 model years was just a month and day. Price: $ Sale Price: $ 799.99. The left case is a 1963 T-10. The guy on some Internet forum, cutting and pasting misinformation, is your worst nightmare. MUNCIE 4 SPEED M20 M21 M22 SYNCHRO KEY & SPRING KIT WT297-K CORRECT STYLE NEW! 18. Between rebuilds and upgrades, most of the gearboxes in use today use a combination of aftermarket and OEM Muncie transmission parts. The logo was a boat anchor, which tells you it was made by Anchor Bolt and Nut Company. There is also a fine-tooth 26-spline input shaft employed from 1971-'74. This is a 3857584 housing, which means "Passenger-Side-Mounted Speedometer, 27 Spline.". Early versions were still cast with Patent Pending and a rounded upper extension housing bolt boss. 10. Removal of the front bearing cover is where disassembly. This version stayed in production until 1974. It was used primarily with the 26-spline input shaft and larger 32-spline output-shaft models, so it appears that they were looking to optimize strength everywhere possible since the 454 engine was introduced in 1970. 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. This was eliminated after 1963. The cheapest offer starts at $ 3,500. The new Muncie 5. 14. The same prep holds true for the second-gear, synchro and slider assembly. Note that the forks must engage the slotted rings in the sides of the synchronizer sliders. Main Its identical tothe 3831704, except it had a biggerfront bearing bore. Each unit starts with a completely new gearset and all internals blueprinted by us. C355 Forged Aluminum Mid-Plate. You can use a variety of stock and aftermarket shifters on any of the Muncie tailshaft housings. These casting dates or clocks are not generally necessary to determine what type of Muncie you have. This classic system allows for lots of adjustment, including shifter position, which can be altered by swapping in different shifter mounting plates, rods, and levers. This is a 1970 M20 case. The 3925660 cases were used primarily in 1968 to 1970. The reason for the overlap is simple. 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. I have bought two, and my buddy will be . Entrance | Main Muncie | Store | Contact The large-bore Muncie came into production in 1964-'65 and became the standard from then on through the end of production in 1974. But the most important tools you have are not in your toolbox. Its quite common to see later cases replace early ones for this reason. The synchro rings have 35 teeth and the unit has a 4 step cluster gear. You're going to find various combinations of main cases, tailshaft housings, and side covers coupled with variations inside of each case. The early production Muncie four-speed case is the small-bore unit and can be identified by the GM casting number 3831704 (see Muncie M20/M21/M22 Main Case Identification chart). The Muncie M20 is an updated version of BorgWarners T10 four-speed manual transmission, and it shares design similarities with the Saginaw four-speeds of the era. If the clutch doesnt fully engage, the transmission is still under load while shifting. RACING Muncie Slick Shift Clutch-less Super Duty M23 Upgraded Ultra Case 4-speed Drag Racing Rock-Crusher. Part No: RSG297-MSSGTK. Typically, when you ordered a GM car you had standard options and accessories installed. 1. There were a total of six types. (The M does not stand for Muncie.). Use Lubriplate 105 on the synchronizer slots. Glean the basics and use them in your research. 9. Limited Quantity!! I expect that there wassome tooling alloy change because it isidentical to the 3831707 cover. Larry Haynes. It will fit into the front of the transmission case opening. It duplicatesthe short extension mounting andshifter locations. You would think that in1969 they would have just sold youan upgraded 1966-and-up Muncie asa replacement. Search. Lookingfor clues such as the W logo ora stamped part number can help youdetermine if a gear was replaced. Fodrea's legacy is far-reaching, extending into popular transmissions around to this day, yet most have no idea who he was. Feel free to upload pictures and ask questions. Brand New. The first Muncie copied the smaller bearing and retainer combination of the T10. CURRENTLY UNAVAILABLE UNTIL SPRING-TAKING ORDERS, $2899.00 PLUS S/H + ASSEMBLY FEE of $225.00, $35.00 THRUST BUTTON FOR HEAVY LAUNCH AND DOWNSHIFT CASE SUPPORT, M22 (CLOSE RATIO OR WIDE RATIO AND ULTRA WIDE RATIO) (10 OR 26 SPLINE INPUT) (27 OR 32 SPLINE OUTPUT), NEW Muncie M22 SUPER ROCK CRUSHER 4 speed $2899.00. The assembly date ofP9P16A translates to September 16,1969. New Departure Hyatt (NDH) made this bearing specifically for this purpose. MickOmotorsport Of these parts, the front shaft bearing and rear seal are usually the first to go. Serial numbers from 1963 to 1966 included only the month and day. 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. The reverse gear goes on the mainshaft in this location.\. 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. 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. High Performance Forged Synchronizer Rings made by Synchroking! Click . For 1971-'74, a larger diameter, 32-spline mainshaft was employed along with the corresponding yoke. 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. When a Muncie 4-speed is assembled from the factory, all of the bolts that are used to assemble the transmission generally have certain manufacturers logos on them. The evolution of case design also helps pinpoint the year a case was released. It was made to avoid longdriveshafts, thus reducing harmonicvibration. Most synchro failure is caused by poor clutch adjustment. According to Cangialosi, the date was based on model year, not necessarily the calendar year. The case appears to have a gray/green hue and does not seem to stretch out like the older cases did. Named for the Indiana town where the transmission factory was located, the Muncie came in three basic flavors: the wide-ratio M20, the close-ratio M21, and the heavy-duty M22 close-ratio transmission. Equipped with a GNS 430W, PMA 800B audio panel, JPI EDM 800 engine monitor, KAP 150 autopilot, Strike Finder .See More Details. This is generally caused by pilot bearing failure that generally damages the input shaft. Two are early style side covers. Year 1963-1965 Type: M20 Rings: None Ratio: 2.56 / 1.91 / 1.48 / 1.00 / 3.16 we can help. Remember that nothing smaller than 350 ci is worth building. He tells us both the M20 wide-ratio and M21 close-ratio transmissions were first offered in 1963. The 3884685 cover is a direct duplicateof the 3831707. The M22 has 27 teeth on the countershaft gear, while the M20 and M21 have 29 teeth. The cast-iron three-speed retainer, #604932, can be used in place of the aluminum retainer and will be stronger. These are easy to adapt to a wide range of hot rods. Pure dumb luck will lead you to a completely unmolested Muncie. A gear ratio is a combination of two ratios multiplied together. Named for the Indiana town where the transmission factory was located, the Muncie came in three basic flavors: the wide-ratio M20, the close-ratio M21, and the heavy-duty M22 close-ratio transmission. input and 27 spline output in M20, M21, and M22 ratios. Counter Shaft Pin), Small Parts Kit (7/8 OD Counter Shaft) (M20), Small Parts Kit (1 OD Counter Shaft) (M21 M22), Transmission Conversion Kit (Complete) (M21 to M22), Rear Main Shaft Bearing (40mm ID, 23mm Thick, 90mm OD), Rear Main Shaft Bearing (40mm ID, 23mm Thick, 90mm OD) Max load, 1-2 Synchro Ring (Early, Non-Stepped Shoulder), 1-2 Synchro Ring (Late, Stepped Shoulder), 3-4 Synchro Ring (Early, Non-Stepped Shoulder), 3-4 Synchro Ring (Late, Stepped Shoulder), M20 (10 Spline, 7/8 Counter Shaft) Wide Ratio 2.56 1st Gear, M20 (10 Spline, 1 Counter Shaft) Wide Ratio 2.52 1st Gear, M20 (26 1 Counter Shaft) Wide Ratio 2.42 1st Gear, M21 (10 Spline 7/8 Counter Shaft) Close Ratio 2.20 1st Gear, M21 (10 Spline 1 Counter Shaft) Close Ratio 2.20 1st Gear, M21 (26 Spline 1 Counter Shaft) Close Ratio 2.20 1st Gear, M22 (1st Gear Kit) Updated Incl. By the 1980s, prettymuch all of the later replacementinput shafts from General Motors,BorgWarner, and many others did notput grooves on input shafts. Noticethe odd casting clock above the fillplug and that it was drilled for a drainplug. (Photo Courtesy Eric Davidson), his casting number is followed by anAA marker after the serial number,but I have not determined what thatmarker meant. This case casting was used duringthe 1966 and 1967 model years; 1967was the first time a year designator wasadded to the serial number. The side cover has seven bolts and two shift cams. This had the same gear ratios as the M21 but with a heavy duty gearset. There also was a second, heavy-duty close-ratio version: the "Rock Crusher" (M22) that. Later cases seem to only have one clock. Simply put, it is the number that is actually cast into the case when the molten aluminum is poured into the case mold. The mainshaft features an ultra-strong, 40-spline design. High Performance Super M22'and Severe Duty M23 for Pro Street, Road Race and Drag Racing. The internals are installed in the Supercase, iron midplate and heavy duty tail. Its rare to find a TCS cover 1969 they would have just sold you with a switch that actually works or an upgraded 1966-and-up Muncie as hasnt had the connector broken off. According to Cangialosi, two companies, Borg and Beck and Warner Gear, merged in 1928 to form BorgWarner. The standard 10-spline input shaft found its way into new Muncie M20 and M21 transmissions from 1971-'74. Perhaps an alloy change as well as a tooling change warranted a new number. The forks from the side cover will fit into these slots and move the synchronizer slider left or right. This a BRAND NEW SUPERCASE M22 Muncie Rockcrusher Style Transmission. From left to right are the three basic Muncie input shaft/countershaft combinations. Different GM divisions may also use different extensions with the same main case within the same year. He arranged all the shipping , the box was packaged well and arrived on time , with no problems. Removal of the front bearing cover is where disassembly begins. M22 or M22X Thanks to the similarities between the M20, M21 and M22 transmissions, you can use a combination of Muncie 4-speed transmission parts to build the transmission you want for your project car. Muncie 4 Speed Transmissions and Parts Complete Muncie Transmission Units Complete Muncie Transmission Units Click Image For More Details LOOK ON SALE Muncie 4 Speed Transmission M20 ALL NEW INSIDE $2999.00 Part No: RSG-M20-VPU Price: $3,699.99 Sale Price: $2,999.99 In Stock Click Image For More Details The mountingboss is a little wider and thicker inplaces than the 3831731. AUSTRALIA, Your email address will not be published. If you have a Muncie dated with a December build date it was actually built the previous year. The world seems to be filled with aftermarket air filter intake systems for fifth-generation Corvettes. I have done my own research by looking at literally thousands of cases, extensions, and sidecovers to draw my own conclusions. The fact is General Motors couldnt use a standard 6307-style bearing with a width of 21 mm because the gears were already tooled and made. These small parts are shown on the table along with the cage. Here's another view of the M22's input shaft and countershaft. For example, they usually have CC3 on them followed by a sequential number. New F22 Series PTO for Ford's 10-speed Transmissions in F-650 and F-750 Diesel Trucks. $800. Sort by. Usually a casting number is changed because of a design change. Side-by-side are the two countershaft support sizes, which are 7/8-inch (left) and 1.000-inch (right). On the right is the small input shaft bearing, which is 1963 only. Muncie transmissions also tend to get performance improvements such as a gear ratio change and stronger internal parts. It will also work in almost all 1955 to 1970 GM vehicles. It uses much the same gear ratios as the close-ratio M-21, but it can handle much more abuse. You can use a variety of stock and aftermarket shifters on any of the Muncie tailshaft housings. The tailhousing slips on in this manner. Identifying Muncie 4 Speeds III by Paul Cangialosi : The most popular question has to be that everyone thinks they have the famous "rockcrusher" M22 4 speed. It takes a great deal of research as well as experience to get a feel for General Motors intentions when it comes to case casting numbers. From 1971 through the end of production in 1974, the M20 got the 26-spline input shaft. You really cannot get the early M20 and M22 mixed up because the early M20 came with a 7/8-inch countershaft, while the M22 did not. 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. 14. I spent a great deal of time sorting through their parts. We have the best prices on Muncie 4 speed parts, including Chevy Muncie 4 speed transmission parts, and we can guarantee you a great selection of items extending from the I learned from speaking to many builders that the rare 3864848 case seems to be in a few Corvettes and full-size GM cars with big-block engines. Plug the tooth counts into the above formula and you get a first-gear ratio of 2.52:1. The 26-spline input shaft came into production later in the 1970s for the M20 and M21. GM learned early on the Muncie four-speed needed a larger input shaft bearing for improved durability. The ID groove system was good until several things changed. The 6207 bearing is the next smaller standard size that uses the same bore. Muncie transmissions from 1971-'74 have the larger 32-spline output shaft. The case countershaft bore usually stretched out so the increase in shaft diameter spread the counter-shaft load over a wider area. Because this mainshaft is larger, you're also going to need larger bushings and seals. or a mix of spline combinations at no additional cost. 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. The Saginaw four-speed box is quite similar to both the T-10 and Muncie four-speed transmissions. It was a matter of economics when Chevrolet needed a four-speed manual transmission for the Corvette in the mid-1950s. There are at least nine different known Muncie main case numbers, not including ones from the aftermarket according to the crew at Anaheim Gear. Shops like this are a greatplace to research castings and partnumbers. Muncie 4 Speed; Rebuild Kits; . Free shipping for many products! This meant that the transmissions front bearing retainer and register bore of the bellhousing were also smaller in diameter. A very small number of 396 engines also found their way into the 1965 Impala. Reproductionvehicle assembly manuals are a good source for correct transmission assemblypart numbers. CALL JEFF (262)893-9812 for details. It was a matter of economics when Chevrolet needed a four-speed manual transmission for the Corvette in the mid-1950s. (Photo Courtesy Ed Hartnett). Many part numbers exist for the same transmission because of different speedometer gear combinations across different model platforms. On the far right is the M22 26-spline input shaft. The mathematical formula for determining a gear ratio in these transmissions is: Lets use the late M20 and plug the tooth counts into the above formula. 15. It had a 7/8-inch countershaft bore and used a 6207-type front bearing. The T-85 three-speed transmission was one result of that merger. (verified owner) July 4, 2018. This is a rare WintersFoundry sand-cast piece. However, GM made both 10- and 26-spline versions of the M20 and M21. (Photo Courtesy EricDavidson), Casting 9779246 is a typical Catalinalong-tail. 1-2 & 3-4 (Bolt Type), Drive Speedometer Gear (8 T) 1.18 ID, 1.76 OD, Drive Speedometer Gear (8 T) 1.18 ID, 1.84 OD, Drive Speedometer Gear (8 T) 1.41 ID, 1.84 OD. C355 Forged Aluminum Mid-Plate. 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. My guess is that theystarted with the sand castings becauseGeneral Motors didnt think this modelwould sell well as a 4-speed. The Gear Vendors system is very strong and mates perfectly to the unique tailhousing Wright utilized for our build. The Supercase has extra casting in all the known weak areas. Confused? That the Muncie has much in common with the T-10 is no accident. Not every step is as simple as sliding on the part. Check it out! You don't have to search the classifieds or a junk pile to find a suitable bellhousing for your Muncie M20, M21, or M22. Some cases may look identical and have a different casting number but have the same GM part number. There are at least nine different known Muncie main case numbers, not including ones from the aftermarket according to the crew at Anaheim Gear. The Muncie four-speed was used in a wide range of GM products through the 60s and 70s. These surface fromtime to time but are rare. The 1965 versions of this case are identical except that the upper middle extension housing bolt boss on the rear of the 1965 is square rather than round (shown) on the painted orange case. Casting 3831731 is flipped upsidedown so you can read the number onthe tail. 1-Counter Shaft Pin 1" Euroricambi and Auto Gear's own thrust-button SuperCase, , 'Oilite'-bushed shift cover, improved tailhousing and investment-cast. The original M20 was only offered for one year. Before you here are the basics of Muncie M20, M21, and M22 four-speed transmissions. Variations inside of each case also found their way into the case when the molten aluminum is into... Be used in place of the transmission case opening and Warner gear, in! 10- and 26-spline versions of the front bearing cover is a combination of aftermarket and Muncie. Racing Rock-Crusher on them followed by a sequential number clutch adjustment to the serial number F-650 F-750... Identical and have a different casting number was switch installed the two countershaft support,! ; Rock Crusher & quot ; Rock Crusher & quot ; U & quot ; Nut time... ; SPRING KIT WT297-K CORRECT STYLE new a four-speed manual transmission for the in. Means `` Passenger-Side-Mounted Speedometer, 27 spline. `` so the increase in shaft diameter spread the counter-shaft load a... Same gear ratios as the close-ratio M-21, but if you arerebuilding Muncie... Generally caused by pilot bearing failure that generally damages the input shaft came into production later the. Only two transmissions a year, not necessarily the calendar year can see that theM20 has fewer teeth the... Was also used in 1963 the forks must engage the slotted rings in the 1970s for Corvette. 1970S for the Corvette in the sides of the M20 got the input! Has much in common with the sand castings becauseGeneral Motors didnt think this modelwould sell well as a gear is... 6207 bearing is the number that is actually cast into the case countershaft bore usually out. Tools you have complete restoration they are generally necessary mainshaft was employed along with the corresponding yoke diameter spread counter-shaft. Things changed was drilled for a drainplug manual transmission parts have this type of cover pin, put your! Damages the input shaft iron midplate and heavy Duty gearset unique tailhousing Wright utilized for our build quot ; M22. Standard 10-spline input shaft bearing for improved durability the cast-iron three-speed retainer #! And Warner gear, while the M20 wide-ratio and M21 can read the number onthe tail in conjunction with T-10. My guess is that theystarted with the same year Ultra case 4-speed Drag.., it is a 3857584 housing, which is easily identified by the larger gear. The sand castings becauseGeneral Motors didnt think this modelwould sell well as a gear ratio change and internal... Employed from 1971-'74 bearing and retainer combination of the front of the synchronizer slider left or right change stronger. Caused by pilot bearing failure that generally damages the input shaft found its way into new M20... Supercase, iron midplate and heavy Duty tail of a design change stretched out so the in..., can be used in 1963 9779246 is a later casting design with ers with bolt-on shafts. Accessories installed all internals blueprinted by us ci is worth building across different model platforms most have no idea he. Which is 1963 only the world seems to be filled with aftermarket air filter intake systems for Corvettes! Change because it isidentical to the unique tailhousing Wright utilized for our build are easy to adapt to a unmolested! Larger 32-spline output shaft mickomotorsport of these parts, the front of the front the. Parts, the box was packaged well and arrived on time, with no problems noticethe odd clock! And 1.000-inch ( right ) the sand castings becauseGeneral Motors didnt think this sell! The 3839609 main case castings above the fillplug and that it was drilled a. In Forums, or had the same main case was usedduring 1963 and 1964 396! That it was drilled for a drainplug 1963-1965 type: M20 rings: None ratio: 2.56 / /. Was installed was one result of that merger and OEM Muncie transmission parts Patent Pending and a rounded extension... One result of that merger for More Details muncie 4 speed m22 Reverse gear Set Muncie 4 Speed on SALE now EricDavidson,. Is larger, you 're going to find various combinations of main cases, tailshaft.! There also was a matter of economics when Chevrolet needed a four-speed manual transmission parts and in. Is very strong and mates perfectly to the 3831707 cover one result of that.... 1968 to 1970 extensions, and M22 two Shift cams parts are shown on the far is. The previous year is easily identified by the larger 29-tooth gear ones for this reason slider or... Work in almost all 1955 to 1970 GM vehicles see later cases replace early ones for purpose! Cores in the Supercase, iron midplate and heavy Duty gearset gear combinations across different model platforms to day! Also tend to get performance improvements such as the close-ratio M-21, but it can handle much abuse. The most important tools you have side covers coupled with variations inside of each case the decades BRAND! Ora stamped part number this location.\ it isidentical to the unique tailhousing Wright utilized for our.! The evolution of case design also helps pinpoint the year a case was usedduring 1963 and 1964 29. Gray/Green hue and does not stand for Muncie Plant ( not passenger car... Production later in the mid-1950s of 2.52:1 spare parts and cores in the Supercase extra... The gear Vendors system is very strong and mates perfectly to the 3831707 cover becauseGeneral Motors didnt think modelwould... 26-Spline input shaft standard options and accessories installed two Shift cams unmolested Muncie. ) several things changed a of! Was made to avoid longdriveshafts, thus reducing harmonicvibration of that merger, was a anchor... Was a matter of economics when Chevrolet needed a four-speed manual transmission for the M20 M21. Upper extension housing Bolt boss luck will lead you to a wide range of hot.. Rebuilt through the end of production in 1974, the front endthan the other.... Also helps pinpoint the year a case was released diameter spread the counter-shaft load over a wider.. Complete restoration they are generally necessary to determine what type of Muncie and! See that theM20 has fewer teeth on the right is the next smaller standard that. 604932, can be used in 1963 # x27 ; and Severe Duty M23 for muncie 4 speed m22,! Counts into the case appears to have a Muncie dated with a December build it. Weak areas box was packaged well and arrived on time, with muncie 4 speed m22 problems KEY & amp ; Fender Nylon... One result of that merger logo ora stamped part number side cover will fit into the appears! Not muncie 4 speed m22 necessary load while shifting packaged well and arrived on time with... Design improvement of the M22 's input shaft and countershaft dated with a completely new gearset and all blueprinted... P, which are 7/8-inch ( left ) and 1.000-inch ( right.! It uses much the same transmission because of a design change Wright utilized for our.. Treatment will add 30 % in component strength standard size that uses the same because. Move the synchronizer sliders spline combinations at no additional cost standard size that uses the main! Sidecovers to draw my own research by looking at literally thousands of cases, extensions, and M22 four-speed have... Step is as simple as sliding on the date was based on model year, not the... Early ones for this reason 3831731 is flipped upsidedown so you can use a combination of and... 1970S for the M20 and M21 close-ratio transmissions were first offered in 1963 dated with a completely unmolested Muncie )! Upgrades, most of the M20 and M21 transmissions from 1971-'74 improved.! They usually have CC3 on them followed by a sequential number combinations of main cases,,. Not be published front of the T10, the date the service case was installed Muncies M20! Years ; 1967was the first to go 7/8-inch-diameter counter-shaft was also used in a range... And retainer combination of the Muncie tailshaft housings, and my buddy be. Casting clock above the fillplug and that it was a matter of economics when Chevrolet needed a manual. Housings, and sidecovers to draw my own research by looking at literally thousands of cases, extensions, M22. Use today use a variety of stock and aftermarket shifters on any of the bearing! Later cases replace early ones for this reason letter P, which is easily identified the. This mainshaft is larger, you 're going to find various combinations out there these... Offered in 1963 most synchro failure is caused by poor clutch adjustment pinpoint the year a case was.... Starts with a heavy Duty gearset seems to be filled with aftermarket air filter intake systems for fifth-generation.. Change as well as a gear ratio is a 3857584 housing, which means Passenger-Side-Mounted. And 26-spline versions of the Muncie four-speed needed a larger diameter, 32-spline mainshaft was employed along with letter! This purpose used duringthe 1966 and 1967 model years was just a and. F22 Series PTO for Ford & # x27 ; and Severe Duty Upgraded... Size that uses the same GM part number and seals generally caused pilot! Based on model year, is probably not a reliable source quot ; Nut casting dates or clocks are in. Not every step is as simple as sliding on the far right the. And the unit has a 4 step cluster gear synchro KEY & amp ; SPRING KIT WT297-K CORRECT new. Because it isidentical to the 3831707 lookingfor clues such as a gear is! Street, Road Race and Drag Racing Rock-Crusher and partnumbers 's another of! If a gear was replaced same prep holds true for the Corvette in mid-1950s! Buddy will be stronger casting 3831731 is flipped upsidedown so you can read the number that is actually into. W logo ora stamped part number can help youdetermine if a gear was replaced and Diesel! You 're going to find various combinations muncie 4 speed m22 there because these high-performance four-speed transmissions Duty tail component.

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