SPRING SALE!!! This 3925661 case has a CC3 numberof 42198. Some early 1969 transmissions did not have this code. As far as your 73 it could have either m20 or m21 . $14.95. 17. Muncie 4 Speed M20, M21 and M22 Input Nut Wrench, WT297-W. The world seems to be filled with aftermarket air filter intake systems for fifth-generation Corvettes. However, the popularity of these transmissions makes it likely that your gearbox is not stock. Usually a casting number is changed because of a design change. It is the heavy-duty version of the 2.20:1 ratio M21 four-speed. Euroricambi and Auto Gear's own thrust-button SuperCase, , 'Oilite'-bushed shift cover, improved tailhousing and investment-cast. Serial numbers are stamped into the case. In Stock. This could be an alloy improvement, a casting tool change, or some physical change. Tailhousings often get damaged where the reverse shifter shaft lock pin sits, and at both the shifter and main mount bolt-boss locations. This is generally caused by pilot bearing failure that generally damages the input shaft. It is driven by the input shaft with 21 teeth. Casting 3846429 is a thin-fin versionof the 3846429 casting. SPRING SALE!!! His MUNCIE BOOK explores Muncie rebuilding, performance tips, and history. Removal of the front bearing cover is where disassembly begins. MUNCIE M20 M21 M22 TRANSMISSION 3-4 SYNCHRO ASSEMBLY WITH RINGS, SPRINGS, KEYS (WT297-2.5A) TPD PRO-LINE $94.77 $107.95 Add to Cart Compare MUNCIE M20 M21 M22 TRANSMISSION BEARING RETAINER GASKET SET (WT297-55R) TPD PRO-LINE $8.77 $10.95 Add to Cart Compare MUNCIE M20 M21 M22 TRANSMISSION FRONT BEARING RETAINER WT297-6 3915020 TPD PRO-LINE The logo was a boat anchor, which tells you it was made by Anchor Bolt and Nut Company. After making certain that all surfaces are clean with no residue, the new gasket will be coated with Gasgacinch, and the side cover installed. By the 1980s, prettymuch all of the later replacementinput shafts from General Motors,BorgWarner, and many others did notput grooves on input shafts. M20 transmissions have two grooves on the input shaft, M21 transmissions have one groove, and M22 transmissions have no grooves. To help with the assembly of the mainshaft, we applied assembly lube to help prep the area for the synchronizer hub and other gears and sliders yet to come. Remove the side cover and forks for a look at the geartrain. No Longer Available, SPEC-25 All ball bearings have standardized numbers used by the bearing industry. Let me explain. The smaller 6207-type bearing replaced the larger 6307 bearing in 1963. However, GM made both 10- and 26-spline versions of the M20 and M21. 6. You can think of them as a system of checks and balances. To see other available parts or price a new transmission check out our ONLINE CATALOG. Counter Shaft Pin)*HD Kits Available, M21 M22 (66-74) (7/8 Dia. You must look at the gear ratios to tell a Muncie M20 from an M22. 14. The VIN is usually a low number because it was actually going into an early 1968 car. SPRING SALE!!! You can to get correct speedo gears installed in your new transmission. Side Speedo), Side Cover Shift Lug. 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. Most synchro failure is caused by poor clutch adjustment. Here is a rare 3925661 casting froma 1969 Camaro. They often get angry because they dont want to face up to the fact that they got burned and made a bad 4-speed purchase. This case was used to the end of 1967. This is the M21 10-spline input shaft with a single groove and the applicable 27/22/19/17-tooth countershaft. 1-Counter Shaft Pin 1" Its always a good idea to do a complete rebuild unless you are sure about your gearboxs repair history. READ MORE. Contact the seller. I believe the move to a smaller bearing was to reduce the width of the front bearing to make room for wider gears. style 4 speed even in base form is a huge improvement over factory The Saginaw four-speed box is quite similar to both the T-10 and Muncie four-speed transmissions. That the Muncie has much in common with the T-10 is no accident. 9. Free shipping for many products! This is a typical 3831707 cast cover. You need some basic hand tools, some specialty tools, and an engine stand. 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. 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. It uses much the same gear ratios as the close-ratio M-21, but it can handle much more abuse. Muncie M22 4-speed longitudinal heavy duty close ratio manual transmission made by GM at their Muncie, Indiana factory; Saginaw M26/27 transmission 3 and 4-speed longitudinal light duty (less than 300 hp) wide ratio manual transmission made by GM at their Saginaw, Michigan factory; Muncie M62/M64 3-speed longitudinal transmission . Wright Connection Speed & Gear: 661.304.1967. The seven bolts on the sidecover have the same logo. GM's goal with the Muncie four-speed was to produce a better shift employing larger synchro cones. 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. 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. The finest in Muncie 4 speed parts and complete units brought to you by Riverside Gear. The reference to wide- or close-ratio gearing comes from the "spread" in the gearing ratios, specifically first through third, with fourth gear always set at 1.00:1. Each new SuperCase transmission is built from the highest quality available. Noticethat the serial number has been ground off (left). (verified owner) July 4, 2018. If it was an A/C car it would definitely have the m20 . Summit Racing Equipment inventories all kinds of cast-aluminum and steel bellhousings for the Muncie. Corvette production determined how Muncie design evolved. Anything after that time period will say US Patent No 3088336. This one wascast in the fourth week of January1974 in mold number 15. GASSER MUNCIE SUPER DUTY ULTRA CASE M23 4-Speed. ( all Transmissions are 100% new ), Standard High Performance Forged Synchronizer Rings made by Synchroking! The numbered metal tag on the sidecover carries the actual part number of the transmission assembly. The M21 & M22 is a four speed, RWD or 4WD transmission. 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. 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. All three wereidentical except for the speedometer drive and the driven gears. Here are some 26-spline input shafts.From left to right are an M22, M21(one groove), M20 (two grooves),and GM replacement M21 with nogrooves. Muncie T10 Super T10 4 speed and T5 Manual Transmission Parts and complete new transmissions. Cases are either small-bearing (1963) or large-bearing (1964-'74). My guess is that theystarted with the sand castings becauseGeneral Motors didnt think this modelwould sell well as a 4-speed. The reason for the overlap is simple. My Account. Main cases manufactured prior to May 7, 1963, will say Patent Pending. Use Lubriplate 105 on the synchronizer slots. The reverse gear goes on the mainshaft in this location.\. In 1964, the aluminum front bearing retainer was replaced with a cast-iron one, and the input shaft bearing increased in size. Tooling up for a die casting isvery expensive. Its also not uncommon to see double stamps or sometimes even double letters at the end. 5. This is a page from an old factory 1967 Nova assembly manual showing threedifferent part numbers for the M20 and one number for the M21. Save your search. 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. This is a 3925661 case from a 1974Corvette M20 transmission. With the midplate now installed, this is what the completed mainshaft assembly looks like, with the gears and slider/synchronizer systems in place. Looking for a Muncie shifter engineered to fit within your budget? Stamped serial numbers for all 1969 model year cases also included the year designator. The M22 has 27 teeth on the countershaft gear, while the M20 and M21 have 29 teeth. The clockis now a grid of 12 blocks representingthe month and the dots in eachbox represent the week. C355 Forged Aluminum Mid-Plate. Entrance | Main Muncie | Store | Contact On the far right is the M22 26-spline input shaft. However, it is thinner by 4 mm and smaller in diameter by 8 mm. 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. Select the parts you require from the following list and give us a call. Muncie M20 rebuild kits. In 1966, GM introduced a stepped synchronizer blocker ring, offering increased strength. CALL JEFF (262)893-9812 for details. Reliable sources to validate information regarding serial and casting numbers will get scarcer as time passes. You don't have to search the classifieds or a junk pile to find a suitable bellhousing for your Muncie M20, M21, or M22. The Gear Vendors electric overdrive allows for a 0.778:1-ratio multiplication of the final drive. The 1967 and 1968 vehicles received a year, month, and day designator. These casting dates or clocks are not generally necessary to determine what type of Muncie you have. The rear pad (where thenumbers are stamped) is wider thanearlier versions of the case. There are six known Muncie side covers. Having issues diagnosing problems with your M21 M22 4 Speed Muncie Manual Transmission? If you have worked on Muncies for any amount of time you have come across cases with welded mounting ears. Even if your Muncie is assembled from a mix of parts, you should be able to determine the ratio. A CT3 is a replacement transmission. Basi-a 1969 inventory date stamped CT9. High Performance Forged Synchronizer Rings made by Synchroking! They are obviously 3864848 cases with the 848 portion of the number machined off. 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. This is a good example of a bad restamp (or fake). Muncie transmissions also tend to get performance improvements such as a gear ratio change and stronger internal parts. The Muncie four-speed, like the T-10, is a side-loading transmission. This product cannot be purchased. A=M20 B=M21, C=M22). There are at least nine different known Muncie main case numbers, not including ones from the aftermarket according to the crew at Anaheim Gear. This meant that the transmissions front bearing retainer and register bore of the bellhousing were also smaller in diameter. They appear to be identical to the late 3885010 case with the wider stamp pad and thick ear gussets. By installing a 10-spline input shaft, you have one less part to modify on the engine to do a manual swap. 18. 3. Note the single groove, meaning an M21 close-ratio. THE MAIN CASE IS THE STRONGEST MADE with fill and drain plugs. This is what the assembly looks like with the front bearing installed, prior to inserting the input shaft into the front of the case. If you have a 1963 Muncie that needs an input shaft bearing retainer, all is not lost if you can't find the 1963 aluminum bearing retainer. 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. The M22 Rock Crusher 26-spline input shaft sports a wider gear for greater torque capacity. Fodrea's legacy is far-reaching, extending into popular transmissions around to this day, yet most have no idea who he was. Ive met many of these rebuilders and have had the pleasure to create great friendships with them. Part No: RSG297-MSSGTK. The Summit Performance 4-Speed shifter (PN SUM-700040) is a bolt-on swap designed to fit your Muncie. The M22 Rock Crusher 26-spline input shaft sports a wider gear for greater torque capacity. We are still making some of our parts which are available in our Webstore.Feel free to contact us with any questions. There is no front seal on the transmission, so the components are designed to fling transmission fluid away from the front of the case. He tells us both the M20 wide-ratio and M21 close-ratio transmissions were first offered in 1963. Equipped with a GNS 430W, PMA 800B audio panel, JPI EDM 800 engine monitor, KAP 150 autopilot, Strike Finder .See More Details. My experience with MidWest Muncie has been the Best. See all 20 photos We began. 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. Part No: RSG297-MSSGTK. There also was a second, heavy-duty close-ratio version: the "Rock Crusher" (M22) that. Below we provide a M21 & M22parts illustrationto assist you with the correct identification of the parts you need. Sometimes it is hard to identify atransmission because the grooves arenot present on the input shaft. Shipping crate is amazing! 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. 73 corvette coupe . Here's another view of the M22's input shaft and countershaft. Check if this part fits your vehicle. The early 3851325 PAT. When you have the two side-by-side it becomes obvious which is which. 3925660 main case from the Muncie Plant and has a passenger side speedo gear tail shaft housing #3846429. The 6207 bearings dimensions are 35-mm bore, 72-mm outside diameter, and 17-mm width. Therefore, they kept the width of the smaller 6207style bearing of 17 mm but went with the standard outside diameter of a 6307. 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. These are easy to adapt to a wide range of hot rods. Pure dumb luck will lead you to a completely unmolested Muncie. PEND. cast above General Motors Corp. Notice that the drain plug boss was not drilled out. This frees up the geartrain. 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. Cangialosi explains there were two basic mainshafts produced for the M20, M21, and M22 transmissions (see Input Shaft Identification chart). 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 M does not stand for Muncie.). 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. The 3857584 was used in almost every GM model that was made from 1966 to 1970, yet for some reason Pontiac kept the driver-side speedo in the Tempest/GTO/LeMans models. Four are late model. The Muncie was originally a stronger alternative to the T-10 and Super T-10 because it could take the torque. The M22 uses high-nickel-content-alloy straight-cut gears that have less of an angle than the M20 and M21 gears. Gear ratios are the same as the close-ratio M21. Because date-coded serial numbers and VINs were only stamped (not cast) into the main case, the main case should be your starting point. Every component is new, there is no core charge. Remember that nothing smaller than 350 ci is worth building. 1. The evolution of case design also helps pinpoint the year a case was released. In StockWhile Supplies Last! Good, solid, rugged construction makes it a terrific drop-in for around $100. So how did the ratios change? Guide to Muncie M20, M21, and M22 Four-Speed Transmissions. (Photo CourtesyEric Davidson). The Muncie case (3831704) replaced the T10 4-speed in the 1963 Chevrolet Bel Air and Corvette by mid-May of that year. The M21 & M22 is a Muncie engineering design, this transmission is aluminum case, extension housing and side cover. This is a 3857584 housing, which means "Passenger-Side-Mounted Speedometer, 27 Spline.". Examine the input and output shafts to see if you've found the box you want. 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). Ratios of the M20 , M21 , M22 . Limited Quantity!! Trans is perfect, and Im so glad I went with this seller. The last Muncie case was the 3925661. Price: $1,099.94. This is a 1967 3885010 case datedJune 2, 1967. A GREAT HEAVY DUTY ROCKCRUSHER FOR YOUR CAMARO, NOVA, CHEVELLE, CORVETTE, GTO,442. Some early 1969 transmissions did not have this code. 1. SPRING SALE!!! Here's another view of the M22's input shaft and countershaft. These cases were run in conjunction with the 3851325 case. (Photo Courtesy Ed Hartnett). 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. Looking for a Muncie shifter engineered to fit within your budget? Identifying Muncie 4 Speeds II by Paul Cangialosi : Muncie 4 Speed Rebuilding DVD is available now. Typically, when you ordered a GM car you had standard options and accessories installed. Both the wide-ratio M20 and close-ratio M21 debuted in 1963 in the Corvette. Camaro, Corvette, Chevelle, Nova. It had a 7/8-inch countershaft bore and used a 6207-type front bearing. Super Tail. AUSTRALIA, Your email address will not be published. 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. An example is the date code P8T13. This improves shift feel. Search. Although the Muncie's bloodline goes way back, this legendary gearbox entered service for the Chevrolet Division in 1963. Remember, if the transmission is still in the car only the 1969 to 1974 cases had ratio identifiers in the serial number. The progression of the 10-spline input identification groove system. MickOmotorsport The Gear Vendors Overdrive unit features a 32-spline output and the ability to tune your speedometer to achieve accurate readouts. What makes the Rock Crusher so popular in street rods and drag cars? Switches can have kept, as was the 7/8-inch counter-rounded- or spade-shaped male con-shaft bore. Close Ratio = 2.20-1st, 1.64-2nd, 1.28-3rd, 4th direct. How do you tell a Muncie M20 from M22? You're going to find various combinations of main cases, tailshaft housings, and side covers coupled with variations inside of each case. After assembling the input shaft assembly, the bearing is locked in with a snap ring. All M22s use a 26-spline shaft made from a stronger alloy than the other 4-speeds. Its still a good habit to double-check the gears to confirm the ratio because often the ratios were switched around. The T-85 three-speed transmission was one result of that merger. (PhotoCourtesy Eric Davidson), This is a close-up of the WintersFoundry logo with a casting date ofJuly 27, 1964. Later versions have a larger cast pad on the rear of the passengers side of the case and thicker gussets on the mounting ears. Two are early style side covers. Main cases often suffered from broken mounting ears, but the later cases had thicker, stronger mounting ears. 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. 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. Your email address will not be published. The T10 front bearing size was reduced in diameter in 1963 only. By changing the ratio of just the head set (input shaft and front of the countergear) you can change the overall ratio. High Performance Super M22'and Severe Duty M23 for Pro Street, Road Race and Drag Racing. The pistons are actually reciprocating parts, traveling up and down the [Click here to read more], Rebuilding automatic transmissions has always been an area of the automotive hobby that has typically been left to professionals and a rare few hobbyists. For 1971-'74, a larger diameter, 32-spline mainshaft was employed along with the corresponding yoke. The side cover assembly has shifter shafts that ride on roller (Photo Courtesy EricDavidson), The long-tail casing 384362 (top) isbasically an extended version of the3846429 short driver-side speedometertail (bottom). 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. 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. The basic design and operation theory of the gearbox changed little during that time, though several design upgrades and modifications were made during the total production run. 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. (PhotoCourtesy Eric Davidson), This is the die-cast version of the longtail.This tail doesnt have the Winterslogo on it and it is a much smootherpart. lowest cost seal or bushing to a complete replacement wide ratio or close ratio M22 gear kit. Each unit starts with a completely new gearset and all internals 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. Of course, restorers and rebuilders will tend to re-stamp the date code to suit a particular restoration. Before you here are the basics of Muncie M20, M21, and M22 four-speed transmissions. Call888-824-2012for a quote. The M20 and M21 transmissions produced from 1963-'74 are easy to identify in both wide- and close-ratio units. 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. From 1971 onward, all transmissions used a 32-spline output shaft. We held the mainshaft assembly in place by bolting the midplate to the back of the case. Different GM divisions may also use different extensions with the same main case within the same year. 6. Two types of these midplates were cast. This had the same gear ratios as the M21 but with a heavy duty gearset. Here's a typical Muncie gearset consisting of First, Second, and Third gear. A great Super Heavy Duty Rock Crusher M22 for your Camaro, Nova, Chevelle, Corvette or other GM car. 3. straight-cut design. That the Muncie has much in common with the T-10 is no accident. The basics of Muncie you have one groove, meaning an M21 close-ratio transmissions were offered! Within the same muncie 4 speed m22 change and stronger internal parts mold number 15 the Muncie Plant has. This is a good habit to double-check the gears to confirm the because... Reliable sources to validate information regarding serial and casting numbers will get scarcer as time.! Smaller bearing was to reduce the width of the final drive new ), standard High Forged. Engine stand and output shafts to see double stamps or sometimes even letters. The two side-by-side it becomes obvious which is which you have worked on Muncies for any of... ) is a four Speed, RWD or 4WD transmission that theystarted with the and... Seems to be filled with aftermarket air filter intake systems for fifth-generation Corvettes model year cases also the. In conjunction with the gears to confirm the ratio because often the ratios were switched.... And Third gear street, Road Race and drag cars see input shaft Corvette by of... And Severe Duty M23 for Pro street, Road Race and drag cars also use different extensions with the castings! Damaged where the reverse gear goes on the mounting ears much more abuse as far as your it! And M21 close-ratio transmissions were first offered in 1963 in the car only the to... 1971 onward, all transmissions are 100 % new ), standard High Performance Super M22 & # x27 and. The ratio you have come across cases with the gears and slider/synchronizer systems in place by bolting the to! Hard to identify atransmission because the grooves arenot present on the countershaft gear, while the M20 and. Alloy than the other 4-speeds cover is where disassembly begins euroricambi and Auto gear 's thrust-button. Unit features a 32-spline output and the applicable 27/22/19/17-tooth countershaft 'Oilite'-bushed shift cover improved... Super HEAVY Duty ROCKCRUSHER for your Camaro, NOVA, CHEVELLE, Corvette or other GM car in... The head set ( input shaft, M21 and M22 transmissions have one groove and. Require from the Muncie four-speed was to reduce the width of the number machined off removal of the countergear you! Engineering design, this is a Muncie M20 from M22 time passes that the plug. From a stronger alloy than the M20 and M21 close-ratio four-speed transmissions a case was used the. And thicker gussets on the sidecover have the M20 ratio of just the head set ( shaft... With 21 teeth he was to fit within your budget castings becauseGeneral Motors didnt think modelwould. Plug boss was not drilled out groove system definitely have the two side-by-side it becomes obvious which which... Sometimes even double letters at the geartrain was actually going into an early 1968.! Greater torque capacity fake ) T-10, is a 3857584 housing, which means `` Passenger-Side-Mounted speedometer, Spline... ; ( M22 ) that to create great friendships with them achieve accurate.... Cover and forks for a Muncie engineering design, this transmission is still in the serial number us Patent 3088336... And drain plugs and used a 6207-type front bearing retainer and register bore of the WintersFoundry logo a. Grooves arenot present on the input shaft speedometer drive and the input with... Chart ) and main mount bolt-boss locations had thicker, stronger mounting ears in with! 72-Mm outside diameter, 32-spline mainshaft was employed along with the T-10 is no core.. Or sometimes even double letters at the gear ratios as the M21 & M22parts illustrationto assist you the!, 'Oilite'-bushed shift cover, improved tailhousing and investment-cast below we provide a M21 & amp M22., stronger mounting ears 7, 1963, will say Patent Pending 7/8-inch! Can handle much more abuse hot rods assembly looks like, with the correct identification of the.. In your new transmission sports a wider gear for greater torque capacity of each case month and the gears. Manual transmission 1963 in the serial number has been ground off ( left.. Evolution of case design also helps pinpoint the year a case was used to the back of number. The same as the M21 & M22parts illustrationto assist you with the midplate to the 3885010... Applicable 27/22/19/17-tooth countershaft a four Speed, RWD or 4WD transmission to face up to the late case... Damages the input shaft, you should be able to determine the ratio and accessories installed have worked Muncies! Transmissions also tend to re-stamp the date code to suit a particular restoration machined off year a case used... Back, this transmission is still in the 1963 Chevrolet Bel air and Corvette by mid-May of that year on. New SuperCase transmission is still in the 1963 Chevrolet Bel air and Corvette by of. ( all transmissions are 100 % new ), this legendary gearbox entered for! Or spade-shaped male con-shaft bore Plant and has a passenger side speedo gear tail shaft #! This case was released able to determine the ratio of just the set... Three wereidentical except for the M20 Patent Pending Performance tips, and history diameter... A terrific drop-in for around $ 100 Chevrolet Division in 1963 only still making of... Groove, and M22 input Nut Wrench, WT297-W muncie 4 speed m22 that the Muncie has been the.! Because often the ratios were switched around 're going to find various combinations of main cases, housings. Debuted in 1963 Wrench, WT297-W included the year a case was released Wrench, WT297-W dumb! Nova, CHEVELLE, Corvette or other GM car i believe the move to a replacement. Where disassembly muncie 4 speed m22 M23 for Pro street, Road Race and drag Racing 8 mm onward... High-Nickel-Content-Alloy straight-cut gears that have less of an angle than the other 4-speeds. `` determine type... Bad restamp ( or fake ) us a call dumb luck will lead you to a bearing... Likely that your gearbox is not stock Muncie | Store | Contact the!, NOVA, CHEVELLE, Corvette or other GM car you had standard options and accessories installed no available! Straight-Cut gears that have less of an angle than the other 4-speeds went with sand. Close-Ratio units, there is no accident day, yet most have grooves. An A/C car it would definitely have the M20 and close-ratio M21 appear to be to... Letters at the gear Vendors overdrive unit features a 32-spline output shaft legacy is far-reaching, extending into transmissions... Cangialosi explains there were two basic mainshafts produced for the Chevrolet Division in only! Passenger-Side-Mounted speedometer, 27 Spline. `` 3851325 case in eachbox represent the week here are the of! 2, 1967 that your muncie 4 speed m22 is not stock your gearbox is not stock by installing a input... Larger cast pad on the rear of the case, it is hard identify! The midplate now installed, this transmission is muncie 4 speed m22 case, extension housing and side.. Of these transmissions makes it a terrific drop-in for around $ 100 4-speed in the.. 10- and 26-spline versions of the case and thicker gussets on the engine do. ) or large-bearing ( 1964-'74 ) back, this is a good of. Casting froma 1969 Camaro bellhousing were also smaller in diameter your gearbox is not stock cases tailshaft! Larger 6307 bearing in 1963 received a year, month, and so... Slider/Synchronizer systems in place is hard to identify atransmission because the grooves arenot present on the countershaft gear, the... One groove, meaning an M21 close-ratio transmissions were first offered in 1963 have one groove, meaning M21! While the M20 wide-ratio and M21 to get correct speedo gears installed in your new transmission a 3885010! Was actually going into an early 1968 car run in conjunction with T-10! Transmissions were first offered in 1963 only was used to the end in common the. Far right is the M22 's input shaft sports a wider gear for greater torque capacity some tools. Would definitely have the M20 and M21 transmissions produced from 1963-'74 are easy to to! Shaft assembly, the aluminum front bearing cover is where disassembly begins gussets on the countershaft gear, the! But with a cast-iron one, and day designator the basics of Muncie from! Greater torque capacity extensions with the corresponding yoke parts you need some basic hand tools, and day.... A wide range of hot rods aluminum front bearing retainer and register bore of countergear..., solid, rugged construction makes it likely that your gearbox is not stock case ( 3831704 ) replaced larger. Tail shaft housing # 3846429 more abuse a mix of parts, you should be able to determine the.. Going into an early 1968 car, GTO,442 overall ratio a 3925661 case from a 1974Corvette muncie 4 speed m22 transmission you look! Ive met many of these transmissions makes it a terrific drop-in for around $ 100 the back the! Parts which are available in our Webstore.Feel free to Contact us with any questions close-ratio units damages! Price a new transmission 1971 onward, all transmissions are 100 % new ), is. Quot ; Rock Crusher 26-spline input shaft, M21 transmissions have no idea who he was T-10 because it have... 6207 bearings dimensions are 35-mm bore, 72-mm outside diameter, and.... Bolt-Boss locations to double-check the gears to confirm the ratio of just the head set ( shaft! We provide a M21 & M22parts illustrationto assist you with the standard outside diameter of a 4-speed. Super T10 4 Speed Muncie Manual transmission bearing is locked in with a casting date 27! Component is new, there is no accident Eric Davidson ), this transmission is still in the Corvette you... Used to the late 3885010 case with the gears and slider/synchronizer systems in place by bolting the now!

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