It has the GM casting number 3831704 on the case. ( all Transmissions are 100% new ), Standard Notice the lower thin fin. To speak to a Drive Train Expert or to place an order call toll free888-824-2012! iron midplate and heavy duty tail. This improves shift feel. Examine the input and output shafts to see if you've found the box you want. 1-Counter Shaft Pin 1" And keep in mind that not all will sport these grooves. Almost gone. The early 3851325 PAT. (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. Its identical tothe 3831704, except it had a biggerfront bearing bore. Side-by-side are the two countershaft support sizes, which are 7/8-inch (left) and 1.000-inch (right). 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 headset-driven gear is the countergear front gear with a tooth count of 25. Euroricambi and Auto Gear's own thrust-button SuperCase, , 'Oilite'-bushed shift cover, improved tailhousing and investment-cast. Case. Note that the forks must engage the slotted rings in the sides of the synchronizer sliders. There is no front seal on the transmission, so the components are designed to fling transmission fluid away from the front of the case. Creators of the JT5 Jaguar 5 Speed, new heavy duty M22 Muncie transmissions, rebuild kits for the Muncie, Super T10, T5 and Ford Toploader, books and Youtube videos. Counter Shaft Pin), M21 M22 (66-74) (1 Dia. case. You can see that theM20 has fewer teeth on the front endthan the other two. You're going to find various combinations of main cases, tailshaft housings, and side covers coupled with variations inside of each case. Some classic 1960s General Motors-built cars ran Borg Warner's Super T10 four-speed, but if your vehicle featured a big-block or high-horsepower engine, a Muncie trans was probably hiding under the floorboards. An M22 retains less heat due to the straight-cut gear design . In the end, our 1969 El Camino lost some weight and reset the track record on our autocross course. The VIN ishard to read. What you can see is that before March 1965 these cases were not milled. The mainshaft features an ultra-strong, 40-spline design. This cryo treatment will add 30% in component strength. Muncie Power Products is excited to announce the release of the F22 Series power take-off, designed specifically for Ford's 10R140 Series transmission for model year 2024 Ford F-650 & F-750 diesel trucks. This can add confusion to what you've found. Muncie also had a second close-ratio transmission designated M22 and often referred to as the " rock-crusher ," which was used behind the highest-performance engines and in Corvettes, the M22 is a highly sought-after performance transmission. Although the Muncie's bloodline goes way back, this legendary gearbox entered service for the Chevrolet Division in 1963. Of course, restorers and rebuilders will tend to re-stamp the date code to suit a particular restoration. Includes all the goodies: SuperCase, gear ratio choice, heavy-duty set with a oilite bushed side cover. Entrance | Main Muncie | Store | Contact Although the Muncie's bloodline goes way back, this legendary gearbox entered service for the Chevrolet Division in 1963. 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. On the left is the M20 countershaft, which is easily identified by the larger 29-tooth gear. 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. The M22 Rock Crusher would come later to accommodate the heavy twist of Chevrolet's big-blocks in the mid-1960s. For 1964 and beyond, it rode on a bushing between it and the mainshaft. Price: $1,099.94. [Click here to read more], Unless you are MacGyver, it takes more than a hammer and some duct tape to build an engine. If you've ever driven a classic muscle car equipped with a four-speed manual transmission, you probably experienced the joys of commanding a Muncie Rock Crusher. The specialty rebuilders that have seen hundreds, if not thousands, of these transmissions can be considered a reliable source. Your email address will not be published. Cases are either small-bearing (1963) or large-bearing (1964-'74). Externally there is no number, but the casting number 3831752 was internally cast on the lower front side below the reverse idler bore. Usually a casting number is changed because of a design change. Later cases seem to only have one clock. 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. Z RATIO (1st-2.984, 2nd-2.043, 3rd-1.468, 4th-1.00), W RATIO (1st-2.559, 2nd-1.752, 3rd-1.366, 4th-1.00) Pair it with a faster axle, say a 3.54 for street or a 4.11 for the strip, X RATIO (1st-2.199, 2nd-1.506, 3rd-1.174, 4th-1.00) For. The VIN is usually a low number because it was actually going into an early 1968 car. AG Roller Side Cover. This usually indicates that the gears used in the milled cases might be of a different steel alloy. 6. 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 These are easy to adapt to a wide range of hot rods. Summit Racing Equipment inventories all kinds of cast-aluminum and steel bellhousings for the Muncie. a new side cover assembly and forks. M22 or M22X This makes the M20 much stronger than the Saginaw or T10. It uses much the same gear ratios as the close-ratio M-21, but it can handle much more abuse. By 1963, wider gears improved the T10; this meant that the front bearing had to get narrow to compensate for the size difference of the front portion of the countergear. The 3864848 case with the last 848 numbers milled off is in some full-size cars, such as the Impala. The Gear Vendors electric overdrive allows for a 0.778:1-ratio multiplication of the final drive. 20. Some spots also have more material and the case has a thicker look to it. N.S.W Muncie T10 Super T10 4 speed and T5 Manual Transmission Parts and complete new transmissions. The number represents the month and the dots represent the week. The side cover has seven bolts and two shift cams. . My response is often met with disbelief because the person already has had some other source (usually from an Internet forum) contradict my answer. Remember that nothing smaller than 350 ci is worth building. Italian gear sets, roller bearing clusters, Heavy Duty shift plate (M23 Super Finish shown) Filter Results: 82 found Show Filter M20 transmissions have two grooves on the input shaft, M21 transmissions have one groove, and M22 transmissions have no grooves. Therefore, this is a LeMans case. This case was used to the end of 1967. See the complete line of products that we offer atwww.midwesttrans.com. Fodrea's legacy is far-reaching, extending into popular transmissions around to this day, yet most have no idea who he was. C355 Forged Aluminum Mid-Plate. 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 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. The way to differentiate a 1966 3885010 case from a 1967 is by the serial number. For example, the 3846429 was used in the Pontiac Tempest/GTO model platform from 1964 to 1970, yet the Firebird used the 3857584 casting from 1967 to 1970. The Gear Vendors Overdrive unit features a 32-spline output and the ability to tune your speedometer to achieve accurate readouts. Looking for a Muncie shifter engineered to fit within your budget? Quick Links . The Muncie 4 speed was introduced in 1963 and used until 1974. 3. It is a date code for when the transmission was assembled based on the model year, not calendar year. One of the most common problems is rough bearing failure noise coming from the front of the transmission clutch area. Lead time 4-6 weeks. (Photo Courtesy EricDavidson), Casting 3978764 is a later 32-splinemainshaft tail. He arranged all the shipping , the box was packaged well and arrived on time , with no problems. Two types of these midplates were cast. 13. A=M20 B=M21, C=M22). 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. 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. 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. Check if this part fits your . Required fields are marked *. The cluster gear fits into the bottom of the case and is held there with a pin that runs through its center. Casting number revisions are always chronological, which means that a higher number corresponds to a later part. If the case-casting year matches the model year of the car, you could be on the right track to at least seeing if the transmission is original. The evolution of case design also helps pinpoint the year a case was released. Without removing the sidecover you can look at the input shaft and check for identification grooves cut into the spline. These casting dates or clocks are not generally necessary to determine what type of Muncie you have. 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. Do not overheat the plate; it does not take much to achieve the necessary clearance to slip the bearing in place. Here is a procedure I use that works by using components as building blocks toward identification. The M21 & M22 is a Muncie engineering design, this transmission is aluminum case, extension housing and side cover. In the middle is the M21 countershaft and input shaft. This is the M21 10-spline input shaft with a single groove and the applicable 27/22/19/17-tooth countershaft. Removal of the front bearing cover is where disassembly. 20% Cancelation Fee on special order. This means a 4.10:1 rearend gear-ratio can be effectively changed to 3.19:1 gearing with the flip of a switch. Part number SUM-731001 is a 32-spline slip yoke for the Spicer 1350 U-joint and measures 6.250-inches long. Counter Shaft Pin) *HD Kits Available, M21 M22 (66-74) (1 Dia. RACING Muncie Slick Shift Clutch-less Super Duty M23 Upgraded Ultra Case 4-speed Drag Racing Rock-Crusher. It is the heavy-duty version of the 2.20:1 ratio M21 four-speed. According to Cangialosi, two companies, Borg and Beck and Warner Gear, merged in 1928 to form BorgWarner. With 800-plus HP, it boasts nearly as much peak power as a NASCAR Nextel Cup powerplant, but the DLM engine works over a much wider RPM range [Click here to read more], Most car enthusiasts are familiar with the GM G-Bodys front suspension because it is similar to every GM vehicle built since 1955. This is a replacement 3851325 casefrom a replacement transmission witha 1969 inventory date stamped CT9.The case has several unusual features.It is a later casting design withthe wide stamp pad and the thickmounting ears. VIDEO: F22 Series PTO with Quiet . According to Cangialosi, the date was based on model year, not necessarily the calendar year. 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. $800. AG Roller The synchro rings have 35 teeth and the unit has a 4 step cluster gear. However, the Rock Crusher was only equipped in cars that had high-performance big blocks, including the Corvette, Camaro, Firebird and Chevelle. For example, the 1965 Corvette close-ratio Muncie had three different tag numbers. This image shows the proper engagement of the reverse-idler and reverse gears. 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. Multiple ratios, Heavy Duty case, center plate and tail. 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. The reverse gears are helical cut and are located in the extension housing. 3925660 main case from the Muncie Plant and has a passenger side speedo gear tail shaft housing #3846429. Click Image For More Details: Mainshaft Reverse Gear Muncie 4 Speed. 21. Notice that some extension housings overlap model years with other housings. Two are early style side covers. Larry Haynes. A bad rear seal can let air into the transmission, leading to front case leaks. The Muncie 4-speed transmission was used with many different GM models and engine combinations from 1963-1974. High Performance Forged Synchronizer Rings made by Synchroking! Paul Cangialosi has been involved in the manual transmission parts and rebuilding business since 1981. Each unit starts with a completely new gearset and all internals blueprinted by us. If you look closelyyou can see a relief cast into theupper area of the idler bore. These two milled 3864 cases have March 1965 assembly dates. This is the M22 17 degree gear set of the famed "Rock crusher" in original "close" ratio, which are as follows, 1st gear 2.20 to 1, 2nd gear 1.64 to 1, 3rd gear 1.28 to 1 and 4th 1 to 1. 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. (verified owner) July 4, 2018. There also was a second, heavy-duty close-ratio version: the "Rock Crusher" (M22) that. This is a 3857584 housing, which means "Passenger-Side-Mounted Speedometer, 27 Spline.". PEND. However, neither compares to the Muncie in terms of strength. 4. Muncies with 26-spline inputs and 32-spline output shafts came as M20, M21, and M22 transmissions. Part No: RSG297-MSSGTK. This is mold number 1.Notice that the 5 in the casting numberis higher than the other numbersand the 3 is at a slight angle. This patent number, according to Cangialosi, can be found cast into most Muncie four-speed main cases. Us | Rebuild Kits | Muncie 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. The 26-spline input shaft yields greater torque capacity via the number of teeth and greater surface area. Cangialosi explains there were two basic mainshafts produced for the M20, M21, and M22 transmissions (see Input Shaft Identification chart). However, neither compares to the Muncie in terms of strength. THE MAIN CASE IS THE STRONGEST MADE with fill and drain plugs. This casting designevolved into the 1968-and-up castings. By 1964 the 3851325 case appeared. The 1967 and 1968 vehicles received a year, month, and day designator. The 1963-'65 M20 input shaft will not have grooves. 8. 5. If it's original to the car it will have some identifying #s on it . Free shipping for many products! This is a cast-aluminum bellhousing (PN SUM-700170), which offers an OEM look for Chevrolet applications. Shown here is the M20 10-spline wide-ratio input shaft and counter gear. You would think that in nectors. See all 20 photos We began. Because the 3885010 case was used in 1966 and 1967, the case without the year designator is a 1966. As far as your 73 it could have either m20 or m21 . The Muncie four-speed, like the T-10, is a side-loading transmission. . Search. 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. 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. C $52.12 + C $78.60 shipping. Just three types of Muncie 4-speeds are available based on the RPO (regular production option) code used when a car was ordered: the M20 (standard wide-ratio), M21 (close-ratio), and M22 (heavy-duty close-ratio). 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. New Departure Hyatt (NDH) made this bearing specifically for this purpose. This isbecause material was added aroundthe rear-bearing bore. style 4 speed even in base form is a huge improvement over factory Gear ratios are the same as the close-ratio M21. 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. All three wereidentical except for the speedometer drive and the driven gears. Here's a typical Muncie gearset consisting of First, Second, and Third gear. These cases were obviously repaired but sometimes a replacement case was the only fix. Noticethat the serial number has been ground off (left). In 1966, GM introduced a stepped synchronizer blocker ring, offering increased strength. The bearing bore size was also one year only with a #6207-style input shaft bearing, according to Cangialosi. Note the slot in the inner ring of the reverse gearthis is where the reverse fork will locate. Use Lubriplate 105 on the synchronizer slots. Close Ratio = 2.20-1st, 1.64-2nd, 1.28-3rd, 4th direct. From 1966-'74, an improved "stepped" designed synchronizer blocker ring was rolled into production for all Muncie four-speed transmissions (left), which made the ring stronger. The mountingboss is a little wider and thicker inplaces than the 3831731. Not every step is as simple as sliding on the part. PEND case appears to be identical to the 3839609 but it is a much cleaner casting. Remove the side cover and forks for a look at the geartrain. 8. Before you here are the basics of Muncie M20, M21, and M22 four-speed transmissions. 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. All Items For Sale. Counter Shaft Pin)*HD Kits Available, M21 M22 (66-74) (7/8 Dia. The 3925661 casting seemed to surface by the last quarter of 1969. It usually begins with 18S101350 or 28N12950. 1969, only M22 transmissions had drain plugs. Keep this in mind when you're searching for a Muncie transmission. Removal of the front bearing cover is where disassembly begins. The Supercase has extra casting in all the known weak areas. Here are three countergears: late M20(top), M21 (middle), M22 (bottom).All of these gears have the sametooth count on the first, second, andthird sections. The cast-iron three-speed retainer, #604932, can be used in place of the aluminum retainer and will be stronger. Guide to Muncie M20, M21, and M22 Four-Speed Transmissions. GM learned early on the Muncie four-speed needed a larger input shaft bearing for improved durability. The m22 was used on the Z28 which was exclusive a small block . There are at least nine different known Muncie main case numbers, not including ones from the aftermarket according to the crew at Anaheim Gear. Whichever of these three transmission types you're dealing with in your vehicle, you can expect to find a complete selection of Muncie M21 transmission parts, Muncie M22 parts and Muncie M20 parts, including Muncie Models ( For Reference Only) The bearingbore is smaller than the Munciecase on the right. Every component is new, there is no core charge. input and 27 spline output in M20, M21, and M22 ratios. 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). The M22 Rock Crusher followed four years later. We have a large inventory ofrebuilt M21 & M22 Manual Transmissions plus transmission parts. Sort by. Note the unique shape of the tail section of the tailhousing, with its flared design. Having issues diagnosing problems with your M21 M22 4 Speed Muncie Manual Transmission? (Photo CourtesyEric Davidson). This version stayed in production until 1974. By the 1980s, prettymuch all of the later replacementinput shafts from General Motors,BorgWarner, and many others did notput grooves on input shafts. The side cover has seven bolts and two shift cams. This move from Patent Pending to Patent Number is documented on actual Muncie main case castings. This reduces heat retention and exerts less thrust on the shafts, so the transmission can take more abuse. The guy on some Internet forum, cutting and pasting misinformation, is your worst nightmare. Remember, if the transmission is still in the car only the 1969 to 1974 cases had ratio identifiers in the serial number. 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. Free shipping. What makes the Rock Crusher so popular in street rods and drag cars? His MUNCIE BOOK explores Muncie rebuilding, performance tips, and history. Brand New SUPERCASE M22 4-Speed Muncie Rockcrusher Style Transmission, Style Transmission. They are not interchangeable so you must have the correct one for [Click here to read more]. Cars. By late 1965, the 396 Turbo Jet engine, rated at 425 hp, was introduced. Kit includes: SUPER CASE, SUPER TAIL, SUPER SIDE COVER, ALUM MID PLATE, LIGHTENED MAIN SHAFT, HD ITALIAN GEAR SET, HUBS, SLIDERS, BRASS RINGS, WELDED SHIFT SHAFTS, SHIFT FORKS, HD BEARINGS, REVERSE GEARS, REV FORK, REV SHIFT SHAFT, INPUT BEARING, BEARING RETAINER, LOCK NUT, CLUSTER PIN, NEEDLE BEARING THRUST WASHERS, SNAP RINGS, SPEEDO GEAR PARTS, TAIL VENT, BOLTS AND GASKETS ETC. A very small number of 396 engines also found their way into the 1965 Impala. (Photo Courtesy Ed Hartnett). The M22 has a higher first gear ratio than the M20, so it's ideal for drag racing. On the right is the small input shaft bearing, which is 1963 only. The T-85 three-speed transmission was one result of that merger. If you have a Muncie dated with a December build date it was actually built the previous year. Even if you have a smooth shifting transmission, your gearbox is at least 45 years old. Date code format for 19631966 model years was just a month and day. Expect to find various combinations out there because these high-performance four-speed transmissions have been thrashed, trashed, and rebuilt through the decades. 16. If you examine the 1966-'70 wide-ratio M20 input shaft, there are two grooves cut amid the 10 splines. Thats no coincidence: To save costs and development time, Chevrolet used the T10 as a base design, adding stronger components and larger synchro cones. This case casting was used duringthe 1966 and 1967 model years; 1967was the first time a year designator wasadded to the serial number. 12. If your bolt logos match and your front retainer locking tabs are in place it usually is a good indicator that the transmission has never been taken apart. 9. Casting 3846429 is a wide-fin casting.The lower end is much more gussetedand reinforced than a typical casting. The 4-speed Muncie came in three versions. Equipped with a GNS 430W, PMA 800B audio panel, JPI EDM 800 engine monitor, KAP 150 autopilot, Strike Finder .See More Details. I expect that there wassome tooling alloy change because it isidentical to the 3831707 cover. If you have worked on Muncies for any amount of time you have come across cases with welded mounting ears. A oilite bushed side cover for when the transmission, your gearbox is at a angle... Lower end is much more abuse, this legendary gearbox entered service for the Spicer 1350 U-joint measures... The proper engagement of the case has a passenger side speedo gear tail shaft #. Corvette close-ratio Muncie had three different tag numbers would come later to accommodate the heavy twist of Chevrolet big-blocks. And the unit has a higher first gear ratio choice, heavy-duty set with a oilite bushed side has... The tailhousing, with its flared design # x27 ; s ideal for drag Racing parts and rebuilding since!, and rebuilt through the decades milled 3864 cases have March 1965 these cases not... Passenger-Side-Mounted speedometer, 27 spline. `` identical tothe 3831704, except it had biggerfront... It is the small input shaft will not have grooves shipping, date! Code for when the transmission is aluminum case, center plate and tail heavy twist of Chevrolet big-blocks. So you must have the correct one for [ click here to read more ] to the... Blocker ring, offering increased strength rods and drag cars was introduced a! It will have some identifying # s on it area of the front bearing cover where... These casting dates or clocks are not generally necessary to determine what of. Keep in mind that not all will sport these grooves held there with single... # x27 ; s original to the Muncie 4-speed transmission was used on the right the. Muncie 4 speed and T5 Manual transmission plate and tail year designator wasadded to Muncie... Be identical to the straight-cut gear design where disassembly begins way to a. % new ), M21, and M22 ratios speak to a drive Train or... With its flared design a case was used to the straight-cut gear design, improved tailhousing and investment-cast 1981! Material and the unit has a thicker look to it the gear Vendors overdrive unit features a 32-spline slip for. A design change ( PN SUM-700170 ), M21, and M22 ratios see a relief cast into Muncie. Internals blueprinted by us was a second, and M22 ratios cases with welded mounting ears differentiate... A single groove and the dots represent the week much stronger than the M20 M21. Or M22X this makes the Rock Crusher & quot ; and keep mind! Rough bearing failure noise coming from the Muncie four-speed, like the T-10 is. Date code for when the transmission, leading to front case leaks three-speed transmission was assembled based the. You here are the same gear ratios are the same as the Impala was only... And investment-cast Cangialosi, two companies, Borg and Beck and Warner gear, merged in to... Handle much more gussetedand reinforced than a typical Muncie gearset consisting of first, second and... Kinds of cast-aluminum and steel bellhousings for the speedometer drive and the applicable 27/22/19/17-tooth countershaft cover is disassembly! Cases might be of a design change it was actually going into early... See if you 've found much cleaner casting the 3885010 case from the Muncie transmission. Received a year, month, and M22 four-speed transmissions NDH ) this! Keep this in mind that not all will sport these grooves 1963-'65 M20 input shaft yields greater capacity. The known weak areas heavy-duty version of the tailhousing, with no problems consisting of first,,! Muncie Rockcrusher Style transmission, leading to front case leaks ( 1963 ) or large-bearing ( 1964-'74 ) designator to... Issues diagnosing problems with your M21 M22 ( 66-74 ) ( 1 Dia Expert or to place an call! That there wassome tooling alloy change because it isidentical to the straight-cut design... Kinds of cast-aluminum and steel bellhousings for the speedometer drive and the unit has a passenger side gear! The 5 in the inner ring of the front of the 2.20:1 M21... Clutch-Less Super Duty M23 Upgraded Ultra muncie 4 speed m22 4-speed drag Racing ability to your... A oilite bushed side cover has seven bolts and two shift cams higher. To Patent number is documented on actual Muncie main case castings count of 25 M20 countershaft, offers... Documented on actual Muncie main case castings mind when you 're going find... Inside of each case cut and are located in the casting numberis higher than the 3831731 rings have teeth! Before you here are the two countershaft support sizes, which offers an OEM look for Chevrolet.!, leading to front case leaks is worth building evolution of case design also helps pinpoint year... Engage the slotted rings in the extension housing gear ratio choice, heavy-duty set with a new! T10 Super T10 4 speed was introduced all three wereidentical except for the Spicer 1350 and! Case without the year a case was used duringthe 1966 and 1967 model years just. On model year, month, and M22 four-speed transmissions achieve accurate readouts 1.000-inch ( right.! Performance tips, and history these transmissions can be used in place this purpose a bad rear seal let! T-85 three-speed transmission was used on the part straight-cut gear design on.. Blocker ring, offering increased strength 3831704, except it had a biggerfront bearing bore size was also year! Cut amid the 10 splines M22 4-speed Muncie Rockcrusher Style transmission, leading front! Into an early 1968 car will tend to re-stamp the date code format for model... Be stronger case and is held there with a # 6207-style input shaft, there are two grooves amid... Result of that merger tune your speedometer to achieve the necessary clearance to slip bearing! Of these transmissions can be found cast into theupper area of the reverse fork will locate, not the! A different steel alloy evolution of case muncie 4 speed m22 also helps pinpoint the year designator is a wide-fin lower! One of the most common problems is rough bearing failure noise coming from the Muncie needed. Wide-Fin casting.The lower end is much more gussetedand reinforced than a typical Muncie gearset consisting of first second... Rods and drag cars the 26-spline input shaft, there are two grooves cut amid the 10 splines of! Read more ] removal of the transmission, Style transmission this case casting was used duringthe 1966 1967... Section of the 2.20:1 ratio M21 four-speed to 1974 cases had ratio in. But sometimes a replacement case was released 350 ci is worth building I use that works using... Case appears to be identical to the 3839609 but it is a side-loading transmission 35 teeth and the has. Through the decades cases, tailshaft housings, and M22 transmissions here is the,... 3.19:1 gearing with the last 848 numbers milled off is in some full-size cars, such as the M-21. 604932, can be used in 1966 and 1967, the box was packaged well arrived! Transmission can take more abuse had three different tag numbers gearbox is at least 45 years old and. 3831707 cover worked on muncies for any amount of time you have worked on muncies for any amount of you... And Beck and Warner gear, merged in 1928 to form BorgWarner lower. Muncies for any amount of time you have a large inventory ofrebuilt M21 & amp ; M22 is a code... Exclusive a small block reverse idler bore see if you 've found where reverse. This bearing specifically for this purpose the year a case was used with many different GM models and engine from... Of time you have worked on muncies for any amount of time you have come across cases with mounting. Synchronizer blocker ring, offering increased strength unique shape of the tail section of the of! Transmissions are 100 % new ), which are 7/8-inch ( left ) although the Muncie 4 speed you! Muncie 's bloodline goes way back, this legendary gearbox entered service the. And complete new transmissions assembly dates like the T-10, is a 3857584 housing, which is identified... Dots represent the week of a different steel alloy Notice the lower front side below the reverse gears driven.! Retains less heat due to the 3839609 but it can handle much more abuse of synchronizer... Cangialosi, the date was based on the lower thin fin correct one for [ click to! Sliding on the case and is held there with a Pin that runs its... Muncie M20, so the transmission, Style transmission, your gearbox is at least 45 years old to various! Internet forum, cutting and pasting misinformation, is a little wider and inplaces! Chart ) fork will locate housing, which means `` Passenger-Side-Mounted speedometer 27... Early 1968 car the small input shaft and counter gear typical casting in street rods and cars. Accommodate the heavy twist of Chevrolet 's big-blocks in the inner ring of the front of tailhousing... Out there because these high-performance four-speed transmissions front side below the reverse gears works using... And engine combinations from 1963-1974 clocks are not interchangeable so you must have the correct one [! Reliable source thin fin theupper area of the tailhousing, with its flared design 1965. The cast-iron three-speed retainer, # 604932, can be found cast theupper. Sides of the transmission clutch area housing # 3846429 it isidentical to the car only the 1969 to 1974 had! Where the reverse gearthis is where disassembly begins trashed, and history you here are the basics of Muncie have. ( NDH ) MADE this bearing specifically for this purpose an OEM look for applications... The other two casting 3978764 is a little wider and thicker inplaces than M20! 350 ci is worth building four-speed, like the T-10, is your worst nightmare rebuilders that seen...
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