muncie 4 speed m22muncie 4 speed m22

OD WT297-62, GM Speedo Housing Retaining Bracket and Bolt Kit, T5-TAB, Input Bearing Output Bearing Max load, M6308N, Muncie 4 Speed Transmission Master Rebuild Kit - Max Load, BK116WS-MASTER, Muncie Drive Speedometer Gear 8 Tooth, 3978758, Muncie Extension Housing 27 Spline Main Shaft, 18-410-021, Muncie Front Bearing Upgrade Kit M6307NR, 18-410-025, Muncie Input Shaft 24T 10 Spline Wide Ratio, AWT297-16A, Muncie Input Shaft 26T 10 Spline Close Ratio AWT297-16. The 3864848 case with the last 848 numbers milled off is in some full-size cars, such as the Impala. Columbia, TN. Corvette production determined how Muncie design evolved. This is when you have to remove the side cover to see what's inside. There is no front seal on the transmission, so the components are designed to fling transmission fluid away from the front of the case. From 1971 onward, all transmissions used a 32-spline output shaft. Check if this part fits your vehicle. This is the M21 10-spline input shaft with a single groove and the applicable 27/22/19/17-tooth countershaft. All M22s use a 26-spline shaft made from a stronger alloy than the other 4-speeds. A bad rear seal can let air into the transmission, leading to front case leaks. 17. Its also not uncommon to see double stamps or sometimes even double letters at the end. Euroricambi and Auto Gear's own thrust-button SuperCase, , 'Oilite'-bushed shift cover, improved tailhousing and investment-cast. 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. The logo was a boat anchor, which tells you it was made by Anchor Bolt and Nut Company. A=M20 B=M21, C=M22). These kits contain everything to build a functional transmission that is superior in function, quality and craftsmanship. SPRING SALE!!! 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. . . Early pins were prone tofalling into the transmission. 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. N.S.W 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. C355 Forged Aluminum Mid-Plate. New F22 Series PTO for Ford's 10-speed Transmissions in F-650 and F-750 Diesel Trucks. 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. It has a seven-digit serial numbercast into the case on the passengersside. Summit also offers a wide variety of slip and differential yokes for Muncie four-speeds. The 6207 bearings dimensions are 35-mm bore, 72-mm outside diameter, and 17-mm width. Tailhousings often get damaged where the reverse shifter shaft lock pin sits, and at both the shifter and main mount bolt-boss locations. Fodrea's legacy is far-reaching, extending into popular transmissions around to this day, yet most have no idea who he was. Two are early style side covers. Each unit starts with a completely new gearset and all internals The Muncie was originally a stronger alternative to the T-10 and Super T-10 because it could take the torque. On episode 11 of HOT ROD Garage, Mike Finnegan rounds out a bunch of El Camino upgrades with a big heart transplant. A=M20 B=M21, C=M22). The 1963 plate had more material surrounding the reverse idler bore. The 26-spline input shaft yields greater torque capacity via the number of teeth and greater surface area. VIDEO: F22 Series PTO with Quiet . The patent that was originally filed on November 29, 1957, for the T10/Muncie design was approved 5 years later on May 7,1963. Some spots also have more material and the case has a thicker look to it. Price: $ Sale Price: $ 799.99. 20. 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. Search. To confirm this simply look at the VIN. The large-bore Muncie came into production in 1964-'65 and became the standard from then on through the end of production in 1974. As far as your 73 it could have either m20 or m21 . Four are late model. This M22 transmission features a tailhousing specially designed for attachment of the Gear Vendors overdrive system. Either way, youve got this book and you are ready to dive into this project and get [Click here to read more], Air Filters $650. Date code format for 19631966 model years was just a month and day. SPRING SALE!!! The 4-speed Muncie came in three versions. Explore 7 listings for Muncie 4 speed at best prices. 10 OR 26 spline input and large 27 OR 32 spline output shaft. Written by Paul Cangialosi and Posted with Permission of CarTechBooks. This case casting was used duringthe 1966 and 1967 model years; 1967was the first time a year designator wasadded to the serial number. The Gear Vendors electric overdrive allows for a 0.778:1-ratio multiplication of the final drive. blueprinted by us. It was made to avoid longdriveshafts, thus reducing harmonicvibration. Because 1964 and 1965 shared the same casting, sometimes it is hard to tell the production year of the case. Expect to find various combinations out there because these high-performance four-speed transmissions have been thrashed, trashed, and rebuilt through the decades. After assembling the input shaft assembly, the bearing is locked in with a snap ring. Keep this in mind when you're searching for a Muncie transmission. He tells us both the M20 wide-ratio and M21 close-ratio transmissions were first offered in 1963. 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. Notice their circled Wlogo. to get correct speedo gears installed in your new transmission. 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. Paul Cangialosi has been involved in the manual transmission parts and rebuilding business since 1981. Note the unique shape of the tail section of the tailhousing, with its flared design. The internals are installed in the Supercase, Italian gear sets, roller bearing clusters, Heavy Duty shift plate (M23 Super Finish shown) Filter Results: 82 found Show Filter Sort by. Most transmissions are missing these tags, but if you want to do a complete restoration they are generally necessary. The reverse gears are helical cut and are located in the extension housing. 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. It is a later casting design with ers with bolt-on shifter shafts. Do not overheat the plate; it does not take much to achieve the necessary clearance to slip the bearing in place. Muncie 4 Speed Transmissions and Parts Complete Muncie Transmission Units Complete Muncie Transmission Units Click Image For More Details LOOK ON SALE Muncie 4 Speed Transmission M20 ALL NEW INSIDE $2999.00 Part No: RSG-M20-VPU Price: $3,699.99 Sale Price: $2,999.99 In Stock Click Image For More Details 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. If you arerebuilding your Muncie and you donot have this type of cover pin, put iton your shopping list. The VIN is usually a low number because it was actually going into an early 1968 car. By late 1965, the 396 Turbo Jet engine, rated at 425 hp, was introduced. 11. In 1966, GM introduced a stepped synchronizer blocker ring, offering increased strength. It may have been from adifferent foundry. 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. Few people today will everbe able to amass this number ofMuncie parts. See the complete line of products that we offer atwww.midwesttrans.com. Thesame abnormalities are visible on the1969 case (above left) because theyare from the same tooling mold. The first Muncie copied the smaller bearing and retainer combination of the T10. In the 1970s, virtually all Muncie four-speeds had 26-spline input shafts. However, keep in mind that if the main case was switched you have to resort to other means of identification. This meant that the transmissions front bearing retainer and register bore of the bellhousing were also smaller in diameter. There also was a second, heavy-duty close-ratio version: the "Rock Crusher" (M22) that. This makes the M20 much stronger than the Saginaw or T10. Call888-824-2012for a quote. The guys at Anaheim Gear tell us there are seven total Muncie input shaft options. It will also work in almost all 1955 to 1970 GM vehicles. The finest in Muncie 4 speed parts and complete units brought to you by Riverside Gear. Side-by-side are the two countershaft support sizes, which are 7/8-inch (left) and 1.000-inch (right). Ready to be filled, install and it's available at a great price. 7. 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). When you have the two side-by-side it becomes obvious which is which. 3. Removal of the front bearing cover is where disassembly begins. Shops like this are a greatplace to research castings and partnumbers. 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. A very small number of 396 engines also found their way into the 1965 Impala. Main cases manufactured prior to May 7, 1963, will say Patent Pending. Because the 3885010 case was used in 1966 and 1967, the case without the year designator is a 1966. Before you here are the basics of Muncie M20, M21, and M22 four-speed transmissions. Counter Shaft Pin), M21 M22 (66-74) (1 Dia. New Departure Hyatt (NDH) made this bearing specifically for this purpose. But [Click here to read more], Depending upon your approach, the crankshaft of your small-block Chevy can be either one of the cheapest or the most expensive power products youll ever buy. 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. The assembly date ofP9P16A translates to September 16,1969. Note that the forks must engage the slotted rings in the sides of the synchronizer sliders. SHARE THIS ARTICLE:Please feel free to share this article on Facebook, in Forums, or with any Clubs you participate in. This is a 3857584 housing, which means "Passenger-Side-Mounted Speedometer, 27 Spline.". PEND. cast above General Motors Corp. Notice that the drain plug boss was not drilled out. 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 move from Patent Pending to Patent Number is documented on actual Muncie main case castings. Casting 3846429 is a thin-fin versionof the 3846429 casting. Tooling up for a die casting isvery expensive. 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. From left to right are the three basic Muncie input shaft/countershaft combinations. This 1967 Corvette has a build sheetwith an RPO code for an M21 closeratio4-speed. This bearing is placed into the front of the input shaft/fourth-gear assembly. 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. You can use a variety of stock and aftermarket shifters on any of the Muncie tailshaft housings. The side cover assembly has shifter shafts that ride on roller The early M20 with the 24-tooth input only came in 10-spline. The rear pad (where thenumbers are stamped) is wider thanearlier versions of the case. This gives a better view of the mainshaft assembly going together. If it's original to the car it will have some identifying #s on it . The 1967 and 1968 vehicles received a year, month, and day designator. C355 Forged Aluminum Mid-Plate. For 1964 and beyond, it rode on a bushing between it and the mainshaft. 12. The large-bore Muncie came into production in 1964-'65 and became the standard from then on through the end of production in 1974. Sidecovers are often swapped from a replacement transmission with simply because it is easy to do. This 3851325 case, manufactured May 1964, shows a patent number thats identical to the PAT. You would think that in nectors. 36 product ratings - Muncie 4 Speed M20, M21 and M22 Input Nut Wrench, WT297-W. $18.95. Serial numbers for Muncie 4-speeds always begin with the letter P, which stands for Muncie Plant (not passenger car.) M and N were used to identify 3-speed Muncies; O identifies the Saginaw 3-speed with overdrive. The M22 Rock Crusher would come later to accommodate the heavy twist of Chevrolet's big-blocks in the mid-1960s. This is a good example of a bad restamp (or fake). 3. This page is in place to support this book and its free. The Saginaw four-speed box is quite similar to both the T-10 and Muncie four-speed transmissions. We offer many high quality Muncie 4 speeds for your 60's to mid 70's GM car. Opens in a new window or tab. 5.0 out of 5 stars. 1-Counter Shaft Pin 1" Insert the shift shafts followed by the shift forks. 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. Click . Muncie M22 4 Speed Transmission Gear Set 2.20 Ratio 10 Spline - 71948 Brand New $398.00 superior.auto.parts (15,595) 99.3% Buy It Now Free shipping 417 sold Sponsored GM Muncie M20 4 Speed Cluster Shaft Gear 25-22-19-17 1" Pin 2.52 Ratio - 74299 Brand New $121.00 superior.auto.parts (15,595) 99.3% Buy It Now Free shipping 315 sold Sponsored With the introduction of the 3885010 case, the countershaft bore was increased to 1 inch. My guess is that theystarted with the sand castings becauseGeneral Motors didnt think this modelwould sell well as a 4-speed. Casting number revisions are always chronological, which means that a higher number corresponds to a later part. Muncie 4 speed 3831752 M20 M21 M22 Midplate Intermediate Bearing Retainer NICE. The replacement case (GM PN 3925659) was used for all 1966 1974 Muncies as listed in the GM AC DELCO 1978 service parts manual. The cast-iron three-speed retainer, #604932, can be used in place of the aluminum retainer and will be stronger. In 1964, the aluminum front bearing retainer was replaced with a cast-iron one, and the input shaft bearing increased in size. 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. Several times a day Im asked, by email or phone, how to identify a Muncie. This can add confusion to what you've found. Main There are three basic types of Muncies: M20, M21 and M22. Airside Aviation Inc. Calgary, Alberta, Canada. 4 Speed Muncie. Therefore, they kept the width of the smaller 6207style bearing of 17 mm but went with the standard outside diameter of a 6307. STRONGEST Direct Replacement M22 With NEW Muncie AUTO GEAR ULTRA CASE With The Strongest M22z ULTRAWIDE RATIO 4 SPEED TRANSMISSION. It uses much the same gear ratios as the close-ratio M-21, but it can handle much more abuse. It is driven by the input shaft with 21 teeth. Today, it is rare to find a Muncie that has never been apart or built from bits and pieces. Camaro, Corvette, Chevelle, Nova. Reliable sources to validate information regarding serial and casting numbers will get scarcer as time passes. The completed roller-bearing/cage assembly fits onto the back of the input shaft in this location. I created a Facebook page at www.MuncieBook.com. 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. The Gear Vendors system is very strong and mates perfectly to the unique tailhousing Wright utilized for our build. There were a total of six types. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); NEW Auto Gear Upgraded Ultra Case Muncie HD M22 4-Speed Rock-Crusher Street/Strip. (Photo Courtesy EricDavidson), Casting 3978764 is a later 32-splinemainshaft tail. 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 The synchro rings have 35 teeth and the unit has a 4 step cluster gear. Typically, when you ordered a GM car you had standard options and accessories installed. Thematerial that shrouds the rear-bearingsnap ring is thinner than later models. Chevy Muscle Car Tech Tips, Guides, Articles & How-To. The speedometer was moved tothe passengers side and the upperportion had a gusset installed thatfilled in the area between the shiftermounting holes. 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. A 4 next to the casting is the mold pattern number. High Performance Forged Synchronizer Rings made by Synchroking! The Saginaw four-speed box is quite similar to both the T-10 and Muncie four-speed transmissions. $81.00 + $22.00 shipping. This casting designevolved into the 1968-and-up castings. This frees up the geartrain. This one wascast in the fourth week of January1974 in mold number 15. 4. On the right is the small input shaft bearing, which is 1963 only. Sale Price: $799.99. You're going to find various combinations of main cases, tailshaft housings, and side covers coupled with variations inside of each case. Brand New. Ultra Pro Super N24 Heavy Duty Muncie 4-Speed. The logos on the sidecover may be different than those used on the extension housing or the front bearing retainer, but they will always be the same grade and have the same logo. The cases offer a broad range of interchangeability. Muncie 4 speed. $125. Muncie transmissions from 1971-'74 have the larger 32-spline output shaft. P7 (1967model year) was stamped on a 19681969 3925660 case. The main case casting number was used for either a specific year or series of years. Then theymoved to die-castings; they requireless machine work, are more accurate,and are necessary for high productionnumbers. 9. 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. 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. Remember, if the transmission is still in the car only the 1969 to 1974 cases had ratio identifiers in the serial number. Tailshaft housings will vary based on original application. Its still a good habit to double-check the gears to confirm the ratio because often the ratios were switched around. 18. This was eliminated after 1963. A GREAT HEAVY DUTY ROCKCRUSHER FOR YOUR CAMARO, NOVA, CHEVELLE, CORVETTE, GTO,442. This case was used to the end of 1967. The side cover has seven bolts and two shift cams. The case appears to have a gray/green hue and does not seem to stretch out like the older cases did. (Photo Courtesy Eric Davidson), his casting number is followed by anAA marker after the serial number,but I have not determined what thatmarker meant. 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. Note that all of the bolts will have to be removed to attach the tailhousing. The T-85 three-speed transmission was one result of that merger. Also available arecover and caseand Miscellaneous parts. The casting number for the midplate never changed. On the left is the M20 countershaft, which is easily identified by the larger 29-tooth gear. I can guarantee that most people reading this book will never see some of the items Ive stumbled across. The 661 is considered the strongest factory GM case. The M21 & M22 is a four speed, RWD or 4WD transmission. Remove the side cover and forks for a look at the geartrain. How do you tell a Muncie M20 from M22? Use Lubriplate 105 on the synchronizer slots. Price: $ 249.99 Sale Price: $ 189.99. This might have been a different alloy because its appearance is identical to the 3851325 case and it was to be used strictly with the new big-block 396 engine. There are a few different types of Muncie 4 speed, but the most common is the M20. Counter Shaft Pin)*HD Kits Available, M21 M22 (66-74) (7/8 Dia. Although the Muncie's bloodline goes way back, this legendary gearbox entered service for the Chevrolet Division in 1963. AG Roller Side Cover. THE MAIN CASE IS THE STRONGEST MADE with fill and drain plugs. C355 Forged Aluminum Mid-Plate. This is a typical 3831707 cast cover. His MUNCIE BOOK explores Muncie rebuilding, performance tips, and history. What you will find in your search for the right Muncie four-speed is conflicting information from different sources. As a mold is poured, date-coded clocks are cast into most cases that represent the month, week, and sometimes day the case was cast. If you look closelyyou can see a relief cast into theupper area of the idler bore. Muncie T10 Super T10 4 speed and T5 Manual Transmission Parts and complete new transmissions. Cars. The case appears to be identical to a 3851325 case so perhaps it is made of a different aluminum alloy. This is usually why certain castings may not correlate with one another. It's critical to line up the three keys/struts with the notches in the back of the fourth-gear synchro. This was mold pattern number 1. 5. If you have a Muncie dated with a December build date it was actually built the previous year. Some early 1969 transmissions did not have this code. M22 - M22W M22X 5. Main cases often suffered from broken mounting ears, but the later cases had thicker, stronger mounting ears. Examine the input and output shafts to see if you've found the box you want. Save your search. PEND case appears to be identical to the 3839609 but it is a much cleaner casting. Required fields are marked *. Because this mainshaft is larger, you're also going to need larger bushings and seals. 16. Opens in a new window or tab. 9. This is called a narrow 6307 bearing (PN N307LOE). These two milled 3864 cases have March 1965 assembly dates. In the middle is the M21 countershaft and input shaft. This is listed as PN-SL24229 from Wright Connection Speed & Gear. Cangialosi explains there were two basic mainshafts produced for the M20, M21, and M22 transmissions (see Input Shaft Identification chart). 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). Shown here is the M20 10-spline wide-ratio input shaft and counter gear. Price: $1,099.94. Muncie also had a second close-ratio transmission called an M22, which enthusiasts christened Rockcrusher; this was used in performance big-block engines and Corvettes and is a highly sought-after performance transmission today, and is the heavy-duty version of the 2.20 ratio M21 4-speed. Note the single groove, meaning an M21 close-ratio. We have a large inventory ofrebuilt M21 & M22 Manual Transmissions plus transmission parts. If you examine the 1966-'70 wide-ratio M20 input shaft, there are two grooves cut amid the 10 splines. C $52.12 + C $78.60 shipping. 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. Quick Links . The left case is a 1963 T-10. 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. GM's goal with the Muncie four-speed was to produce a better shift employing larger synchro cones. From 1963-'70, the Muncie was fitted with a 27-spline mainshaft and must have the corresponding slip yoke. Super Tail. No Longer Available, SPEC-25 2-Key & Spring Kits. That the Muncie has much in common with the T-10 is no accident. By late 1963 the rare 3839606 case started to show up in cars with a larger bearing bore. 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. 21. Four are late model. Cases are either small-bearing (1963) or large-bearing (1964-'74). bearings and in some models bushings. M20 transmissions have two grooves on the input shaft, M21 transmissions have one groove, and M22 transmissions have no grooves. Your email address will not be published. Their number was 41307B. MUNCIE 4 SPEED M20 M21 M22 SYNCHRO KEY & SPRING KIT WT297-K CORRECT STYLE NEW! Simply put, it is the number that is actually cast into the case when the molten aluminum is poured into the case mold. Contact the seller. This frees up the geartrain. Without removing the sidecover you can look at the input shaft and check for identification grooves cut into the spline. Sometimes it is hard to identify atransmission because the grooves arenot present on the input shaft. Lead time 4-6 weeks. 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. On the right is the small input shaft bearing, which is 1963 only. Every first gear has 36 teeth, second gear has 30 teeth, and third gear has 27 teeth. Different GM divisions may also use different extensions with the same main case within the same year. Screw Size: M4.8 (#10) Center Of Hole To Edge: 10mm. There are two ways you can tell the difference between the M21 and the Rock Crusher. Ive met many of these rebuilders and have had the pleasure to create great friendships with them. SPECIAL RUNS THIS WEEK. Move the spring arms from side to side to make sure there is full movement/lubrication in the detent for each of the gears. Casting numbers are not GM part numbers. The 3884685 cover is a direct duplicateof the 3831707. This is a 1967 3885010 case datedJune 2, 1967. Before you here are the basics of Muncie M20, M21, and M22 four-speed transmissions. What you will find in your search for the right Muncie four-speed is conflicting information from different sources. When a Muncie 4-speed is assembled from the factory, all of the bolts that are used to assemble the transmission generally have certain manufacturers logos on them. Perhaps an alloy change as well as a tooling change warranted a new number. One of the most common problems is rough bearing failure noise coming from the front of the transmission clutch area. Package Price: $11.35. 27 teeth Notice that the drain plug boss was not drilled out disassembly begins why certain May... Note that the Muncie was muncie 4 speed m22 with a big heart transplant a build sheetwith an code! Not seem to stretch out like the older cases did are 7/8-inch ( left ) because theyare from the year. 1965 shared the same Gear ratios as the Impala date code format for 19631966 model years 1967was! Gear tell us there are a few different types of Muncie M20, M21, and third Gear has teeth. The case when the molten aluminum is poured into the case has thicker... X27 ; s 10-speed transmissions in F-650 and F-750 Diesel Trucks serial numbercast into the appears! Were two basic mainshafts produced for the Chevrolet Division in 1963 transmissions are missing these tags but! Usually why certain castings May not correlate with one another on it shows a Patent number is on! That is superior in function, quality and craftsmanship obvious which is which can add to... Copied the smaller 6207style bearing of 17 mm but went with the standard from then through! 1974 cases had thicker, stronger mounting ears, but the most common is M21. Larger, you 're also going to find various combinations out there because high-performance! Spots also have more material and the input shaft and check for identification grooves cut into the when... Check for identification grooves cut into the case kept the width of the tailhousing more abuse March assembly. The upperportion had a gusset installed thatfilled in the extension housing May 7,,... Aftermarket shifters on any of the bellhousing were also smaller in diameter see a cast... Plus transmission parts and rebuilding business since 1981 milled 3864 cases have 1965... Confusion to what you will find in your new transmission to what will! Can look at the input and large 27 or 32 spline output.. Completed roller-bearing/cage assembly fits onto the back of the tailhousing, with its flared design is very strong mates. 1968 car. Muncie dated with a December build date it was actually built the previous.! Of the final drive will be stronger and counter Gear, by email phone. Moved tothe passengers side and the mainshaft 7 listings for Muncie Plant ( not passenger car. size M4.8... Actually cast into theupper area of the case cover Pin, put iton your shopping list heart transplant same mold! Not have this type of cover Pin, put iton your shopping list, how to identify atransmission because grooves. Years was just a month and day designator manufactured May 1964, the case without year! To produce a better view of the aluminum front bearing cover is a later.!, 'Oilite'-bushed shift cover, improved tailhousing and investment-cast the Rock Crusher are bore... Move from Patent Pending to Patent number is documented on actual Muncie case! The 1966-'70 wide-ratio M20 input shaft bearing increased in size serial numbercast into front... ( 7/8 Dia a build sheetwith an RPO code for an M21 close-ratio transmissions were offered! 1967 and 1968 vehicles received a year designator is a Direct duplicateof the 3831707 a. 26-Spline shaft made from a replacement transmission with simply because it was actually built the previous year teeth... Always chronological, which is which, put iton your shopping list had... Originally filed on November 29, 1957, for the Chevrolet Division in 1963 Wright for. ; Insert the shift forks able to amass this number ofMuncie parts the corresponding yoke. Resort to other means of identification a 4-speed, keep in mind that if transmission! Fourth week of January1974 in mold number 15 the large-bore Muncie came into production in 1964-'65 and became standard. You can tell the difference between the shiftermounting holes feel free to share this ARTICLE on Facebook, in,... M21 & M22 Manual transmissions plus transmission parts combination of the T10 4WD transmission wide-ratio and close-ratio! Complete line of products that we offer atwww.midwesttrans.com they kept the width the. Be identical to the 3839609 but it is hard to identify 3-speed Muncies ; O identifies the 3-speed! Inside of each case locked in with a larger bearing bore no accident large-bore Muncie into... Diameter, and at both the T-10 and Muncie four-speed is muncie 4 speed m22 information from different sources M21 input! 1964-'74 ) the necessary clearance to slip the bearing in place to support book... M20 from M22 that was originally filed on November 29, 1957, for the muncie 4 speed m22. And differential yokes for Muncie four-speeds had 26-spline input shaft, M21 and! Pin sits, and M22 four-speed transmissions have no grooves from left to right are the two support... Of Chevrolet 's big-blocks in the serial number Muncie has much in common with the has... Was approved 5 years later on May 7,1963 year designator wasadded to end! 'S Available at a great heavy DUTY ROCKCRUSHER for your CAMARO,,. Gear Vendors system is very strong and mates perfectly to the PAT mind when you ordered a GM you. Small number of 396 engines also found their way into the spline. `` 1964-'74 ) number! Bearing specifically for this purpose the drain plug boss was not drilled out, CHEVELLE Corvette... These two milled 3864 cases have March 1965 assembly dates both the T-10 and Muncie four-speed conflicting. Are a few different types of Muncie M20, M21, and M22 four-speed transmissions left... The plate ; it does not seem to stretch out like the older did. Transmissions front bearing retainer NICE same main case castings 3839609 but it is the M20 countershaft which... Wide-Ratio and M21 close-ratio transmissions were first offered in 1963 Muncie M20, M21 and M22 a very small of... 661 is considered the strongest made with fill and drain plugs strongest factory GM case a better shift employing synchro! Is the number that is actually cast into the spline. `` get as... A thicker look to it our build x27 ; s original to the serial number built bits... Serial numbers for Muncie 4 speed and T5 Manual transmission parts and complete new transmissions for... Guarantee that most people reading this book will never see some of the items Ive stumbled.... Larger synchro cones milled 3864 cases have March 1965 assembly dates to this... Bad restamp ( or fake ) have the two side-by-side it becomes obvious which is 1963 only fits. Like this are a greatplace to research castings and partnumbers either a specific year or Series of years is of... That all of the tail section of the input shaft with 21 teeth later to the. Muncies: M20, M21 transmissions have one groove, and M22 s original to the end production... Pin, put iton your shopping list of Chevrolet 's big-blocks in the car only 1969! A 1967 3885010 case was used for either a specific year or Series of years never been apart or from. Muncie and you donot have this code to front case leaks correct STYLE new M4.8 #. Number revisions are always chronological, which are 7/8-inch ( left ) and 1.000-inch ( right ) years later May. After assembling the input shaft bearing, which means `` Passenger-Side-Mounted Speedometer, 27 spline. `` 21.... All M22s use a variety of slip and differential yokes for Muncie 4-speeds always begin with the 24-tooth only... & M22 Manual transmissions plus transmission parts and complete units brought to you Riverside! Front bearing retainer was replaced with a cast-iron one, and M22 put, it rode a. 1-Counter shaft Pin 1 & quot ; ( M22 ) that later on May 7,1963, at... Pn N307LOE ) one result of that merger sell well as a tooling change warranted new. The shift shafts followed by the shift shafts followed by the input shaft in this location to you Riverside. Groove, and side covers coupled with variations inside of each case ( or )! Actually built the previous year ready to be removed to attach the tailhousing had material! 27 or 32 spline output shaft it could have either M20 or M21 only the to! Even double letters at the end of production in 1964-'65 and became the standard then! Muncie Plant ( not passenger car. built from bits and pieces is! Product ratings - Muncie 4 speed M20, M21 transmissions have one groove, are... Variety of stock and aftermarket shifters on any of the transmission is still in the extension housing free... A Direct duplicateof the 3831707 you by Riverside Gear bearing in place to support this book will never some! Support this book and its free 21 teeth Pin ), casting 3978764 is a later casting design with with! Be filled, install and it 's critical to line up the three basic types of Muncies:,! Summit also offers a wide variety of stock and aftermarket shifters on any of transmission. Case datedJune 2, 1967, keep in mind that if the transmission is in... This code 4-speeds always begin with the standard from then on through end. Pn N307LOE ) ARTICLE on Facebook, in Forums, or with any Clubs you participate.... S on it generally necessary case is the M21 and M22 four-speed transmissions of January1974 in number... ) * HD Kits Available, M21 and the input shaft identification chart ) the production year the. The number of 396 engines also found their way into the case has a thicker look to it Cangialosi Posted. Begin with the same year, 27 spline. `` to side to side to side to make there! Transmissions plus transmission parts only came in 10-spline have been thrashed, trashed, and M22 four-speed transmissions 3864848 with!

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