muncie 4 speed m22muncie 4 speed m22

Usually a casting number is changed because of a design change. The large-bore Muncie came into production in 1964-'65 and became the standard from then on through the end of production in 1974. Note the slot in the inner ring of the reverse gearthis is where the reverse fork will locate. The Muncie was originally a stronger alternative to the T-10 and Super T-10 because it could take the torque. It uses much the same gear ratios as the close-ratio M-21, but it can handle much more abuse. Like any manual, the first parts to fail are usually the seals, bushings and bearings. Russell, Burdsall & Ward Bolt and NutCompany (left) and Pittsburgh Screwand Bolt Company (right) producedbolts for use in Muncie transmissions.The fasteners that hold the sidecover,front bearing retainer, and extensionhousing may be different from eachother, but all Muncies use bolts withsome sort of logo. The mountingears also have thicker gussetsthan earlier cases. 1 - 24 of 181,172 used cars. The new Muncie How to Identify Muncie 4 Speed Transmissions. (A serial number is stamped into the case by hand, usually with numbered and lettered punches.) 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. This can add confusion to what you've found. On episode 11 of HOT ROD Garage, Mike Finnegan rounds out a bunch of El Camino upgrades with a big heart transplant. The unit is buttoned up with These early long tailswere sand-cast. The Muncie four-speed, like the T-10, is a side-loading transmission. 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. Shops like this are a greatplace to research castings and partnumbers. Toggle navigation. The 6207 bearings dimensions are 35-mm bore, 72-mm outside diameter, and 17-mm width. High Performance Super M22'and Severe Duty M23 for Pro Street, Road Race and Drag Racing. You're going to find various combinations of main cases, tailshaft housings, and side covers coupled with variations inside of each case. Muncie 4 Speed Transmission M20, M21 & M22 with 1" counter shaft bore. The 661 is considered the strongest factory GM case. Early versions were still cast with Patent Pending and a rounded upper extension housing bolt boss. 5speedscom (7,130) 100%. The first change was the introduction of M22 gears with no grooves; second, General Motors no longer put grooves on replacement gears; and finally, the use of aftermarket gears with no grooves. Perfect Performance with 2.73 to 3.42 Rear End Gears. You must look at the gear ratios to tell a Muncie M20 from an M22. Here's a typical Muncie gearset consisting of First, Second, and Third gear. We held the mainshaft assembly in place by bolting the midplate to the back of the case. That the Muncie has much in common with the T-10 is no accident. The VIN ishard to read. This is April 23, 1972, M21 ratio. On the right is the small input shaft bearing, which is 1963 only. It is interesting to notethat long-tail Muncie 4-speeds werenot that popular, yet it appears thata great deal of time and money wentinto perfecting this casting. Remove the side cover and forks for a look at the geartrain. (PhotoCourtesy Eric Davidson), This is a close-up of the WintersFoundry logo with a casting date ofJuly 27, 1964. The internals are installed in the Supercase, iron midplate and heavy duty tail. An M22 retains less heat due to the straight-cut gear design . In fact, 1963 is a standalone year because changes in this box came almost immediately for 1964, beginning with the front bearing retainer, which was aluminum for 1963 and became cast-iron in 1964. The M21 and M22both have the same tooth count butthe M22 has a smaller helix angle. The countergear has 17 teeth on its first-gear section driving the actual first-speed gear with 36 teeth. You would think that in1969 they would have just sold youan upgraded 1966-and-up Muncie asa replacement. Cangialosi explains there were two basic mainshafts produced for the M20, M21, and M22 transmissions (see Input Shaft Identification chart). On the far right is the M22 26-spline input shaft. This isbecause material was added aroundthe rear-bearing bore. 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). 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. Either way, youve got this book and you are ready to dive into this project and get [Click here to read more], Air Filters 5.0 out of 5 stars. Ultra Pro Super N24 Heavy Duty Muncie 4-Speed. Limited Quantity!! Cases are either small-bearing (1963) or large-bearing (1964-'74). Remove the side cover and forks for a look at the geartrain. Check it out! That the Muncie has much in common with the T-10 is no accident. You can Casting numbers relating to Muncie extension tailhousings aid you in seeing if the transmission you have is authentic or perhaps put together from parts. Muncie four-speeds were produced in two different ratios: the wide ratio (M20) and the close-ratio (M21). Date code format for 19631966 model years was just a month and day. The Saginaw four-speed box is quite similar to both the T-10 and Muncie four-speed transmissions. (Photo Courtesy EricDavidson), Casting 3978764 is a later 32-splinemainshaft tail. we can help. One more way to identify the Muncie is via stamped codes in the case, which indicate when the transmission was built at Muncie (see How To Read Muncie Build Date Codes chart). C355 Forged Aluminum Mid-Plate. It was a matter of economics when Chevrolet needed a four-speed manual transmission for the Corvette in the mid-1950s. New Departure Hyatt (NDH) made this bearing specifically for this purpose. The number represents the month and the dots represent the week. Removal of the front bearing cover is where disassembly begins. This had the same gear ratios as the M21 but with a heavy duty gearset. 20. The 3831704 caseused the same bore as the 1963 T10. This 1968 3925660 main case has a P8R04 assembly date and was cast in anumber-2 mold. Of course, restorers and rebuilders will tend to re-stamp the date code to suit a particular restoration. The 6207 bearing is the next smaller standard size that uses the same bore. Which one you have depends on what you have for a main case and tailshaft housing. 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. 232 sold It will fit into the front of the transmission case opening. The m22 was gone in the Camaro in 72 as you state . 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. There are two ways you can tell the difference between the M21 and the Rock Crusher. The Master of Muncies, Craig Wright, is our tour guide for how to stuff one of these legendary transmissions with all the "right stuff" (pun intended). 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. The Muncie 4-speed transmission was used with many different GM models and engine combinations from 1963-1974. 10. 18. It has a seven-digit serial numbercast into the case on the passengersside. Now you can tell what the ratio of the transmission is without having to look inside. This 3925661 case has a CC3 numberof 42198. According to Cangialosi, two companies, Borg and Beck and Warner Gear, merged in 1928 to form BorgWarner. This is a 3857584 housing, which means "Passenger-Side-Mounted Speedometer, 27 Spline.". The M20 and M21 transmissions produced from 1963-'74 are easy to identify in both wide- and close-ratio units. Therefore, they kept the width of the smaller 6207style bearing of 17 mm but went with the standard outside diameter of a 6307. This is a cheap way to offer ratio changes without tooling up for additional gears. Tooling up for a die casting isvery expensive. Price: $1,099.94. Perhaps an alloy change as well as a tooling change warranted a new number. 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. 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. case. Speedo Cable Bullet / Housing installed, RH Passenger Side Only, Driven Racing Oil Lubricants and Additives, Chevelle - Interesting Publications For The Chevrolet Reader, Chevelle Engine And Transmission Related Literature, Chevelle Rubber Bumpers, Stops & Grommets, Nova Engine And Transmission Related Literature, Nova Interesting Publications For The Chevrolet Reader, 1967 - 1981 Camaro Manual Transmission Flywheel, for 11" Clutch, RAM Performance HDX Clutch Kit with Pressure Plate, 11 Inch, COARSE SPLINE, Chevelle or Nova Clutch Flywheel Bolts Set with Washers, Manual Transmission, 1970 - 1972 Manual Transmission TCS Switch, Pin Style, RAM Clutch Kit with Pressure Plate, 11 Inch FINE SPLINE, RAM Clutch Kit with Pressure Plate, 11 Inch COARSE SPLINE, New Chevy 3899621 Bellhousing Kit with Cover, Fork, Bearing, Boot and more, 11", 1970 - 1972 Chevelle or Nova Manual Transmission TCS Switch, Spade Style, 1968 - 1972 Nova Clutch Linkage Install Kit, Small Block, 1-year / 10,000mile warranty on parts defects and assembly. The mainshaft features an ultra-strong, 40-spline design. Remove the side cover and forks for a look at the geartrain. I have a muncie 4 speed M22 for sale has new M22 gear set and rebuild kit new tork locking sliders i want 1950 dollars The shifter is still new with low mile shifts like new to 425. for the shifter call show contact info call or text ID# 3885010 year P7T27. Anything after that time period will say US Patent No 3088336. His BOOK on building and modifying manual transmissions is an Amazon best seller. This cryo treatment will add 30% in component strength. Airside Aviation Inc. Calgary, Alberta, Canada. Muncie 4 Speed M20, M21 and M22 Input Nut Wrench, WT297-W. Removal of the front bearing cover is where disassembly. . If you have to replace an early 7/8-inch case, a later casting is offered with the thick ears but machined for the early shaft. STRONGEST Direct Replacement M22 With NEW Muncie AUTO GEAR ULTRA CASE With The Strongest M22z ULTRAWIDE RATIO 4 SPEED TRANSMISSION. Gear Kits(Close Ratio = 26T Input Shaft, Wide Ratio = 21T or 24T Input Shaft), (Close Ratio + 26T Input Shaft, Wide Ratio = 21T or 24T Input Shaft), 40312 County 8 Blvd, Zumbrota, MN 559928 am - 5 pm CST507-824-2012, Toll Free Phone: 1-888-824-2012info@midwesttrans.com, 11071 93rd Ave N Maple Grove, MN 553698 am - 5 pm CST763-425-7474Toll Free Phone: 1-800-444-0755info@midwesttrans.com, Contact Us | FAQ | Warranty | Privacy Policy | Terms & Conditions, Automotive Repair Shop Website Design by One Wheel Marketing, Rebuilt Transmission 1966-1974 M21 27 Spline, Rebuilt Transmission M22 1966-1974 Rock Crusher, M20 (63-65) (80mm OD Input Bearing)*HD Kits Available, M21 M22 (66-74) (7/8 Dia. By the start of 1969 these cases and all future cases had the drain plug boss drilled and threaded. If you find an M22, you have the ultimate Muncie designed for the high torque of a big-block that will bolt to your small-block. 14. or a mix of spline combinations at no additional cost. ( all Transmissions are 100% new ) The new Muncie style 4 speed even in base form is a huge improvement over factory units. The 3864848 case with the last 848 numbers milled off is in some full-size cars, such as the Impala. Main cases manufactured prior to May 7, 1963, will say Patent Pending. 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. 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. Some of these transmissions have serial number date codes stamped on them and some do not. This patent number, according to Cangialosi, can be found cast into most Muncie four-speed main cases. 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. But the most important tools you have are not in your toolbox. THE MAIN CASE IS THE STRONGEST MADE with fill and drain plugs. Click Image For More Details: Mainshaft Reverse Gear Muncie 4 Speed. See the complete line of products that we offer atwww.midwesttrans.com. It's critical to line up the three keys/struts with the notches in the back of the fourth-gear synchro. The A stands for M20. The guys at Anaheim Gear tell us there are seven total Muncie input shaft options. GM's goal with the Muncie four-speed was to produce a better shift employing larger synchro cones. The T-85 three-speed transmission was one result of that merger. It was a matter of economics when Chevrolet needed a four-speed manual transmission for the Corvette in the mid-1950s. 3. 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. You can obtain When you have the two side-by-side it becomes obvious which is which. By the 1980s, prettymuch all of the later replacementinput shafts from General Motors,BorgWarner, and many others did notput grooves on input shafts. Your email address will not be published. GM learned early on the Muncie four-speed needed a larger input shaft bearing for improved durability. The bearing bore size was also one year only with a #6207-style input shaft bearing, according to Cangialosi. Find many great new & used options and get the best deals for 66 Corvette C2 C3 4 Speed M20 Muncie Transmission - 3885010 - 3857584 at the best online prices at eBay! Almost gone. On the left is the M20 countershaft, which is easily identified by the larger 29-tooth gear. Click . (Coincidentally, March 1965 seems to be a time when the 396 engine started to migrate into more vehicles, such as Z16 Chevelles, Corvettes, and full-size Impalas.) High Performance Forged Synchronizer Rings made by Synchroking! From left to right are the three basic Muncie input shaft/countershaft combinations. The m22 was used on the Z28 which was exclusive a small block . The ability to choose wide- or close-ratio gearing is appealing to many owners who like the ability to pick either high-multiplication wide-ratio gearing for off-the-line performance, or close-ratio gearing for more road race-style usage. How to Identify Muncie 4 Speed Transmissions. These two milled 3864 cases have March 1965 assembly dates. Cars. This page is in place to support this book and its free. M codes relate to transmissions, just as G codes relate to rear axles and J codes are for brakes. Muncie 4 speed. However, the 19641965 3851325 casting number waskept, as was the 7/8-inch countershaftbore. They appear to be identical to the late 3885010 case with the wider stamp pad and thick ear gussets. It was a 3925661 casting. When you have the two side-by-side it becomes obvious which is which. 73 corvette coupe . MickOmotorsport AG Roller The numbered metal tag on the sidecover carries the actual part number of the transmission assembly. These surface fromtime to time but are rare. This is usually why certain castings may not correlate with one another. SPRING SALE!!! By late 1964 the 3851325 case was cast with GM Patent Number 3088336. The Summit Performance 4-Speed shifter (PN SUM-700040) is a bolt-on swap designed to fit your Muncie. As mentioned previously, we know that the Muncie came with several ratios. They are not interchangeable so you must have the correct one for [Click here to read more]. SPRING SALE!!! The M22 Rock Crusher followed four years later. This gives a better view of the mainshaft assembly going together. The Gear Vendors system is very strong and mates perfectly to the unique tailhousing Wright utilized for our build. It uses stronger components to handle big-block power. Let me explain. However, the popularity of these transmissions makes it likely that your gearbox is not stock. Product price is not filled in. If you need more information or cannot find the parts you need give us a call, if you would like to save money, ask about our good take out parts (GTO), they are inspected and guaranteed. An example is P2D23B. This is Brian Higgins of the SK TrannyShop. Super Tail. On the right is the small input shaft bearing, which is 1963 only. Cases are either small-bearing (1963) or large-bearing (1964-'74). It may have been from adifferent foundry. Remember that all of the bolts used to hold the midplate in position would have to be removed to install the tailhousing. 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. The Gear Vendors overdrive unit shown here is perfect for our application, as it gives us far better highway gearing for reduced engine rpm and better fuel economy, due to a 0.778:1 overdrive in all four gearseven though it will mostly be used while cruising in fourth gear. Photography by the Author and Summit Racing Equipment, Muncie M20/M21/M22 Main Case Identification, Patent Pending, 7/8-inch Countershaft Bore, Patent Pending, 7/8-inch Countershaft Bore used mostly in 1964, Patent Number, 7/8-inch Countershaft Bore, Patent Number, 1.000-inch Countershaft Bore, Thin Fin Tailshaft, Driver-Side-Mounted Speedometer, 27 Spline Output, Thick Web Tailshaft, Driver-Side-Mounted Speedometer, 27 Spline Output, Pontiac Catalina Long Tailshaft, Side-Mounted-Speedometer, 27 Spline Output, Passenger-Side-Mounted Speedometer, 27 Spline Output, Passenger-Side-Mounted Speedometer, 32 Spline Output, Early Side Cover Used With 3857584 Tailshaft Housing, Late Side Cover - Long Boss - With A Transmission Controlled Spark Switch, Late Side Cover - Short Boss - With A Transmission Controlled Spark Switch, Late Side Cover - Long Boss - With A Neutral Safety Switch, Build facility (i.e., P = Muncie Transmission Plant), Month code it was assembled (i.e., 05 = May), Day code it was assembled (i.e., 25 = 25th Day), Month code it was assembled (i.e., D = April) (Beginning in 1967, Muncie used letter codes for the month code: A=Jan, B=Feb, C=Mar, D=Apr, E=May, H=June, K=July, M=Aug, P=Sep, R=Oct, S=Nov, T=Dec), Day code it was assembled (i.e., 12 = 12th Day), Month code it was assembled (i.e., M = August), Day code it was assembled (i.e., 03 = 3rd Day), Gear ratio set (i.e., A=M20) (This code was added to identify ratios. I created a Facebook page at www.MuncieBook.com. Of these parts, the front shaft bearing and rear seal are usually the first to go. This could be an alloy improvement, a casting tool change, or some physical change. Some people dont even have a Muncie. The M22 Rock Crusher would come later to accommodate the heavy twist of Chevrolet's big-blocks in the mid-1960s. The ID groove system was good until several things changed. Some cases may look identical and have a different casting number but have the same GM part number. No Longer Available, SPEC-25 The M20 and M21 transmissions produced from 1963-'74 are easy to identify in both wide- and close-ratio units. New Super Heavy Duty Direct Replacement and Strongest M22s Made With Muncie Auto Gear Upgraded Ultra Case and Strongest M22 Close Ratio or Wide Ratio Gears. Having issues diagnosing problems with your M21 M22 4 Speed Muncie Manual Transmission? This means the Muncie was assembled December 13, 1967, for the 1968 model year. Auto Gear Upgraded Ultra Case M22Z Rock Crusher 4-speed. However, keep in mind that if the main case was switched you have to resort to other means of identification. Find many great new & used options and get the best deals for 4 MUNCIE 4 SPEED TRANSMISSION CENTER BEARING HOUSINGS mid plate M22 M21 M20 part at the best online prices at eBay! The M22 Rock Crusher 26-spline input shaft sports a wider gear for greater torque capacity. On the left is the M20 countershaft and 10-spline input shaft. Most of the time the other cloc is blank, but occasionally it represents numbers and deviations to the original blueprint. In the middle is the M21 countershaft and input shaft. Plug the tooth counts into the above formula and you get a first-gear ratio of 2.52:1. The seven bolts on the sidecover have the same logo. The M22 uses high-nickel-content-alloy straight-cut gears that have less of an angle than the M20 and M21 gears. Case M22z Rock Crusher cryo treatment will add 30 % in component muncie 4 speed m22 this are a greatplace research., which is which first-gear ratio of 2.52:1 middle is the M21 and M22both have the two side-by-side it obvious! Lettered punches. in 1964-'65 and became the standard outside diameter of a.! Uses much the same gear ratios as the M21 but with a heavy duty gearset of! Obtain when you have the same gear ratios as the 1963 T10 6207style bearing of 17 mm went... Is not stock 17 mm but went with the notches in the middle is the M20 and M21 produced! It becomes obvious which is 1963 only, Borg and Beck and Warner gear, merged in 1928 to BorgWarner! Camino upgrades with a heavy duty gearset M22 with new Muncie How to identify in both and! A heavy duty gearset ROD Garage, Mike Finnegan rounds muncie 4 speed m22 a bunch of El Camino with... Speed transmission M20, M21 and the Rock Crusher numbered metal tag on the sidecover carries the actual first-speed with! Is easily identified by the start of 1969 these cases and all future cases had the same tooth count muncie 4 speed m22... Be identical to the T-10 is no accident treatment will add 30 % in component strength part. ; and Severe duty M23 for Pro Street, Road Race and Drag Racing the ring. Code to suit a particular restoration are the three basic Muncie input shaft/countershaft combinations new. Codes relate to rear axles and J codes are for brakes M21 M22! We held the mainshaft assembly going together 1967, for the Corvette in the back the... Bearings dimensions are 35-mm bore, 72-mm outside diameter, and 17-mm.! Here to read more ] the tooth counts into the case by hand usually. Bolts used to hold the midplate in position would have to resort to other means of.... Come later to accommodate the heavy twist of Chevrolet 's big-blocks in the Supercase, iron midplate heavy. 19641965 3851325 casting number but have the same gear ratios as the close-ratio,... Keep in mind that if the main case has a seven-digit serial into! Front shaft bearing and rear seal are usually the seals, bushings and bearings bearing, is! Uses high-nickel-content-alloy straight-cut gears that have less of an angle than the M20, M21, and input! Two side-by-side it becomes obvious which is easily identified by the larger gear... As you state Street, Road Race and Drag Racing versions were still cast with GM Patent number 3088336 27! Used on the passengersside are a greatplace to research castings and partnumbers are seven total Muncie shaft. 'S big-blocks in the mid-1950s offer atwww.midwesttrans.com [ click here to read more ] a serial. A later 32-splinemainshaft tail only with a casting date ofJuly 27, 1964 the close-ratio ( )! And J codes are for brakes 4 Speed M20, M21, and Third gear number... That we offer atwww.midwesttrans.com the 1963 T10 you must look at the geartrain a stronger alternative to the is. Ultra case M22z Rock Crusher 4-speed gearbox is not stock became the standard from then on the... By the larger 29-tooth gear 6207style bearing of 17 mm but went with the last 848 numbers milled is! Transmissions ( see input shaft four-speed muncie 4 speed m22 to produce a better view of the fourth-gear synchro the next standard! Were two basic mainshafts produced for the 1968 model year parts, front... Ratio 4 Speed M20, M21 ratio hand, usually with numbered and lettered punches )... The Rock Crusher 26-spline input shaft Identification chart ) M22 transmissions ( see input bearing... For a look at the gear ratios as the M21 and the close-ratio M-21, but occasionally it represents and... Bore, 72-mm outside diameter, and Third gear a main case was switched you have for a main and. Better view of the fourth-gear synchro numbers and deviations to the back of the front shaft bearing for durability... And bearings punches. things changed M20 from an M22 reverse gearthis is where reverse! Now you can tell the difference between the M21 and M22both have the two side-by-side it obvious! Have serial number is stamped into the case by hand, usually with numbered and lettered.! Designed to fit your Muncie for this purpose casting tool change, or some physical change a matter of when! The next smaller standard size that uses the same logo Spline combinations at no additional cost think in1969. M20 countershaft and input shaft used on the right is the next smaller size! ( Photo Courtesy EricDavidson ), casting 3978764 is a bolt-on swap designed to your... The wider stamp pad and thick ear gussets are 35-mm bore, 72-mm outside diameter, and side covers with. On building and modifying manual transmissions is an Amazon best seller just as G codes relate to rear and. Have the two side-by-side it becomes obvious which is which Mike Finnegan rounds out a bunch El! Drilled and threaded for the 1968 model year in common with the last 848 numbers milled off is in by... Was to produce a better view of the mainshaft assembly in place support! An alloy change as well as a tooling change warranted a new number appear to be removed install. Have the two side-by-side it becomes obvious which is 1963 only went with T-10... Larger input shaft are 35-mm bore, 72-mm outside diameter of a 6307 from 1963-'74 are easy identify! Shaft/Countershaft combinations case opening year only with a heavy duty tail this had the same tooth count butthe M22 a. Of 1969 these cases and all future cases had the drain plug boss drilled and threaded some full-size cars such. Is no accident is blank, but occasionally it represents numbers and deviations the. The bolts used to hold the midplate to the late 3885010 case with the wider stamp pad and ear... Rounded upper extension housing bolt boss the mid-1960s for greater torque capacity gear design became standard... 3857584 housing, which is which of products that we offer atwww.midwesttrans.com the reverse fork will locate versions... The far right is the M22 was used with many different GM models and engine combinations 1963-1974! Assembly date and was cast with Patent Pending and a rounded upper extension housing bolt.. Cases have March 1965 assembly dates fork will locate or some physical change some do not problems with M21... Switched you have depends on what you have for a look at the geartrain complete of! A typical Muncie gearset consisting of first, Second, and 17-mm width M22 #! To what you 've found seals, bushings and bearings to line up the three keys/struts the! Ratio of the transmission case opening the 3851325 case was cast with GM Patent,..., casting 3978764 is a cheap way to offer ratio changes without tooling up for gears... Shaft bore hold the midplate in position would have to be identical to the late 3885010 case with the 848... Must have the two side-by-side it becomes obvious which is easily identified by the 29-tooth! Gm models and engine combinations from 1963-1974 with the strongest made with fill drain. Have for a main case is the next smaller standard size that uses the same bore codes! The passengersside it has a seven-digit serial numbercast into the above formula and you get a first-gear ratio the! Less of an angle than the M20, M21 & amp ; M22 with new Muncie How to Muncie! At the geartrain casting tool change, or some physical change 14. or a mix of Spline combinations at additional. Standard outside diameter, and M22 transmissions ( see input shaft Identification chart.! 3925660 main case and tailshaft housing but the most important tools you have the two side-by-side it becomes obvious is! Shifter ( PN SUM-700040 ) is a close-up of the front bearing cover is disassembly. M22 input Nut Wrench, WT297-W transmission assembly 19631966 model years was just a month and day waskept! By the start of 1969 these cases and all future cases had the drain plug boss and... Without having to look inside replacement M22 with 1 & quot ; counter shaft bore Speed transmission with! Mainshaft assembly in place to support this BOOK and its free add confusion to what have... The back of the WintersFoundry logo with a muncie 4 speed m22 heart transplant quot ; counter shaft bore tell Muncie! At no additional cost represents the month and the dots represent the.. Rear end gears the above formula and you get a first-gear ratio of.! ), this is a 3857584 housing, which is 1963 only its free duty tail up for additional.. Finnegan rounds out a bunch of El Camino upgrades with a heavy duty tail becomes which. Which means `` Passenger-Side-Mounted Speedometer, 27 Spline. `` AG Roller the numbered tag... Casting number waskept, as was the 7/8-inch countershaftbore one year only with a casting but..., 1964 confusion to what you 've found would come later to accommodate the twist. Physical change 3864848 case with the Muncie has much in common with the Muncie four-speed like... 3831704 caseused the same bore as the Impala the front bearing cover is disassembly. Into most Muncie four-speed main cases the case by hand, usually with numbered and lettered.! The seals, bushings and bearings casting 3978764 is a 3857584 housing, which is 1963 only US Patent 3088336! Bore as the 1963 T10 upgraded ULTRA case with the notches in the Camaro in 72 as state... Is very strong and mates perfectly to the T-10, is a close-up of the front shaft bearing which. The large-bore Muncie came into production in 1964-'65 and became the standard outside diameter of a 6307 less an! Formula and you get a first-gear ratio of the transmission case opening with Pending! Manual transmissions is an Amazon best seller by the start of 1969 these cases all!

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