Here's a typical Muncie gearset consisting of First, Second, and Third gear. Some people dont even have a Muncie. Casting number revisions are always chronological, which means that a higher number corresponds to a later part. MickOmotorsport From left to right are the three basic Muncie input shaft/countershaft combinations. Counter Shaft Pin), M21 M22 (66-74) (1 Dia. It was used primarily with the 26-spline input shaft and larger 32-spline output-shaft models, so it appears that they were looking to optimize strength everywhere possible since the 454 engine was introduced in 1970. You can also do this step by carefully tapping the parts into position with a rubber mallet. 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. Of course, restorers and rebuilders will tend to re-stamp the date code to suit a particular restoration. This is a 3925661 case from a 1974Corvette M20 transmission. New Super Heavy Duty Direct Replacement and Strongest M22's Made With Muncie Auto Gear Upgraded Ultra Case and Strongest M22 Close Ratio or Wide Ratio Gears. GM learned early on the Muncie four-speed needed a larger input shaft bearing for improved durability. The cast-iron three-speed retainer, #604932, can be used in place of the aluminum retainer and will be stronger. Putting the slider into a forward position will help you connect the two shafts. MUNCIE 4 SPEED TRANSMISSION TAIL SHAFT HOUSING 3857584 M20 M21 part. Side-by-side are the two countershaft support sizes, which are 7/8-inch (left) and 1.000-inch (right). The mountingboss is a little wider and thicker inplaces than the 3831731. Most transmissions are missing these tags, but if you want to do a complete restoration they are generally necessary. The mid plate is aircraft grade aluminum. 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. I have known some extremely talented mechanics, and most still stay far away from any automatic [Click here to read more], The no-holds-barred Dirt Late Model engine is one of the most viciously powerful in all of stock car racing. Later cases seem to only have one clock. 19. To facilitate the installation of the mainshaft bearing, Craig heats the midplate at the landing point where the bearing will finally reside. GM's goal with the Muncie four-speed was to produce a better shift employing larger synchro cones. Super Pro Road/Drag Race Muncie Upgraded Ultra Case M22 Rock-Crusher. The M22 has 27 teeth on the countershaft gear, while the M20 and M21 have 29 teeth. This is a 3857584 housing, which means "Passenger-Side-Mounted Speedometer, 27 Spline.". Corvette production determined how Muncie design evolved. An example is P2D23B. 21. Muncie Models ( For Reference Only) It usually begins with 18S101350 or 28N12950. Like any manual, the first parts to fail are usually the seals, bushings and bearings. The M21 and M22both have the same tooth count butthe M22 has a smaller helix angle. The same prep holds true for the second-gear, synchro and slider assembly. (Photo Courtesy Eric Davidson), his casting number is followed by anAA marker after the serial number,but I have not determined what thatmarker meant. 73 corvette coupe . This was eliminated after 1963. Muncie 4 Speed Transmission M20, M21 & M22 with 1" counter shaft bore. VIDEO: F22 Series PTO with Quiet . Certain make and model GM cars used one type while other models used something different. (Coincidentally, March 1965 seems to be a time when the 396 engine started to migrate into more vehicles, such as Z16 Chevelles, Corvettes, and full-size Impalas.) 4. The guys at Anaheim Gear tell us there are seven total Muncie input shaft options. Insert the shift shafts followed by the shift forks. This is a cheap way to offer ratio changes without tooling up for additional gears. Main Us | Rebuild Kits | Muncie However, the 19641965 3851325 casting number waskept, as was the 7/8-inch countershaftbore. bearings and in some models bushings. Shipping crate is amazing! It is a date code for when the transmission was assembled based on the model year, not calendar year. Muncie transmissions also tend to get performance improvements such as a gear ratio change and stronger internal parts. The Muncie four-speed was used in a wide range of GM products through the 60s and 70s. You can use a variety of stock and aftermarket shifters on any of the Muncie tailshaft housings. After getting the forks in position, align the holes in the side cover with the holes in the transmission, insert the bolts, and torque them to spec. Screw Size: M4.8 (#10) Center Of Hole To Edge: 10mm. Almost gone. Panel Range: Up To 2mm. 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 number represents the month and the dots represent the week. Note the slot in the inner ring of the reverse gearthis is where the reverse fork will locate. It is a later casting design with ers with bolt-on shifter shafts. Confused? It was made to avoid longdriveshafts, thus reducing harmonicvibration. Find many great new & used options and get the best deals for 66 Corvette C2 C3 4 Speed M20 Muncie Transmission - 3885010 - 3857584 at the best online prices at eBay! You must look at the gear ratios to tell a Muncie M20 from an M22. 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. Summit Racing Equipment inventories all kinds of cast-aluminum and steel bellhousings for the Muncie. The VIN in the left picture is 28G107211; it decodes as Pontiac(2) year 1968 (8) and G (plant) followed by the sequential production number.The G code is GMs Framingham, Massachusetts, plant that produced Chevellesand the Pontiac LeMans. The . His BOOK on building and modifying manual transmissions is an Amazon best seller. Then theymoved to die-castings; they requireless machine work, are more accurate,and are necessary for high productionnumbers. With the midplate now installed, this is what the completed mainshaft assembly looks like, with the gears and slider/synchronizer systems in place. 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. He tells us both the M20 wide-ratio and M21 close-ratio transmissions were first offered in 1963. Many part numbers exist for the same transmission because of different speedometer gear combinations across different model platforms. The 3864848 case, with a December 17, 1964, build date, was probably for an early 1965 car. Remove the side cover and forks for a look at the geartrain. 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. The case countershaft bore usually stretched out so the increase in shaft diameter spread the counter-shaft load over a wider area. What you can see is that before March 1965 these cases were not milled. Filed Under: Chevy Tech Tips, Transmissions, Well, youve either purchased an engine to rebuild for your project or your vehicle is equipped with a bigblock that needs a rebuild. People often get confused about what a casting number is. The reverse gear goes on the mainshaft in this location.\. The Muncie four-speed, like the T-10, is a side-loading transmission. 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. Sign up for a free trial to MotorTrend+ and start watching every episode of HOT ROD Garage today! For 1964 and beyond, it rode on a bushing between it and the mainshaft. 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. 20. 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. Not every step is as simple as sliding on the part. The T-85 three-speed transmission was one result of that merger. iron midplate and heavy duty tail. The M22 Rock Crusher followed four years later. Limited Production!!! For example, the serial number P8A01 is January 1, 1968. According to Cangialosi, two companies, Borg and Beck and Warner Gear, merged in 1928 to form BorgWarner. M22 - M22W M22X 5.0 out of 5 stars. What makes the Rock Crusher so popular in street rods and drag cars? (Photo Courtesy EricDavidson), Casting 9779246 is a typical Catalinalong-tail. 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. GM's goal with the Muncie four-speed was to produce a better shift employing larger synchro cones. 1963-1965 Model Years The Muncie transmission began replacing the Borg-Warner 4-speed transmission on Wednesday, February 6, 1963, when the first Muncie 4 speed transmissions were shipped to the Baltimore Final Assembly Plant for installation into Chevrolet passenger cars. Noticethe odd casting clock above the fillplug and that it was drilled for a drainplug. Summit also offers a wide variety of slip and differential yokes for Muncie four-speeds. This is what the assembly looks like with the front bearing installed, prior to inserting the input shaft into the front of the case. Cars. Removal of the front bearing cover is where disassembly begins. Main cases manufactured prior to May 7, 1963, will say Patent Pending. This one wascast in the fourth week of January1974 in mold number 15. 13. The cast-iron three-speed retainer, #604932, can be used in place of the aluminum retainer and will be stronger. This isbecause material was added aroundthe rear-bearing bore. 1 - 24 of 181,172 used cars. There are six known Muncie side covers. It appears that more milled cases are in circulation compared to unmilled cases. This is an M21 with 10-spline input shaft and cast-iron bearing retainer. Note the single groove, meaning an M21 close-ratio. I created a Facebook page at www.MuncieBook.com. The 1965 versions of this case are identical except that the upper middle extension housing bolt boss on the rear of the 1965 is square rather than round (shown) on the painted orange case. In StockWhile Supplies Last! Side-by-side are the two countershaft support sizes, which are 7/8-inch (left) and 1.000-inch (right). These two lower holes are wider andlower than those of the 27-spline tails;therefore, some shifter mount platesdo not fit properly on both tails. Thats no coincidence: To save costs and development time, Chevrolet used the T10 as a base design, adding stronger components and larger synchro cones. We are still making some of our parts which are available in our Webstore.Feel free to contact us with any questions. Muncie (General Motors) 4-speed longitudinal transmissions were developed in three distinct models The Muncie M20 wide ratio manual transmission, the Muncie M21 close ratio manual transmission and the Muncie M22 heavy-duty close ratio manual transmission. Fodrea's legacy is far-reaching, extending into popular transmissions around to this day, yet most have no idea who he was. Main cases often suffered from broken mounting ears, but the later cases had thicker, stronger mounting ears. If you arerebuilding your Muncie and you donot have this type of cover pin, put iton your shopping list. 1- Set of French Locks. (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. By late 1965, the 396 Turbo Jet engine, rated at 425 hp, was introduced. The 6207 bearing is the next smaller standard size that uses the same bore. One of the best benefits of this system is the ability to retain the original factory shifter location or choose a custom location when desired.. Muncie 4 speed. The 3839609 main case was usedduring 1963 and 1964. So how did the ratios change? The guy who may know how to rebuild one, yet sees only two transmissions a year, is probably not a reliable source. According to Cangialosi, the date was based on model year, not necessarily the calendar year. Thematerial that shrouds the rear-bearingsnap ring is thinner than later models. 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. No Longer Available, SPEC-25 Good, solid, rugged construction makes it a terrific drop-in for around $100. It will also work in almost all 1955 to 1970 GM vehicles. Each unit starts with a completely new gearset and all internals There are at least nine different known Muncie main case numbers, not including ones from the aftermarket according to the crew at Anaheim Gear. The VIN ishard to read. 12. By late 1963 the rare 3839606 case started to show up in cars with a larger bearing bore. Year Make Model Trim Engine Add vehicle Muncie M-22 Rock Crusher Four Speed Transmission - RARE Drivers Side Speedo Refurbished By the 1980s, prettymuch all of the later replacementinput shafts from General Motors,BorgWarner, and many others did notput grooves on input shafts. Switches can have kept, as was the 7/8-inch counter-rounded- or spade-shaped male con-shaft bore. 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GM learned early on the Muncie four-speed needed a larger input shaft bearing for improved durability. 20% Cancelation Fee on special order. He tells us both the M20 wide-ratio and M21 close-ratio transmissions were first offered in 1963. Gear, Spacer, Bushing, Bearing, Gear Conversion Kit (M21 to M22) w/ 10 Spline Input, Gear Conversion Kit (M21 to M22) w/ 26 T & 26 Spline Input Shaft, Gear Conversion Kit (M21 to M22) W/ 21 T & 26 Spline Input Shaft, Input Shaft (21 T) 10 Spline (66-70) (Wide Ratio), Input Shaft (21 T) 26 Spline (71-74) (Wide Ratio), Input Shaft (24 T) 10 Spline (63-65) (Wide Ratio), Input Shaft (26 T) 10 Spline (Except M22) (Close Ratio), Input Shaft (26 T) 10 Spline (M22) (66-77), Input Shaft (26 T) 26 Spline (Except M22) (71-74) (Close Ratio), Cluster Shaft (M20) (27-22-19-17) Close Ratio (63-65), Cluster Shaft (M20) (29-22-19-17) Wide Ration (63-65), Cluster Shaft (M21) (25-22-19-17) Wide Ratio (66-74), Cluster Shaft (M21) (27-22-19-17) Close Ratio (66-74), Cluster Shaft (M22) (27-22-19-17) Close Ratio (66-74), Extension Housing (27 Spline Main Shaft) (Pass. The 19691974s received a year, month, day, and ratio designator. As mentioned previously, we know that the Muncie came with several ratios. The casting number depends on the date the service case was installed. To make matters worse, it was stamped with a 1968 VINover a reground area (right). The 6207 bearings dimensions are 35-mm bore, 72-mm outside diameter, and 17-mm width. The 26-spline input shaft yields greater torque capacity via the number of teeth and greater surface area. From 1971 onward, all transmissions used a 32-spline output shaft. Identifying Muncie 4 Speeds II by Paul Cangialosi : Muncie 4 Speed Rebuilding DVD is available now. Thanks again Jeff, Michael OBrien They appear to be identical to the late 3885010 case with the wider stamp pad and thick ear gussets. Lets take a look at how the Muncie main case evolved from 1963 to actually going into an early 1968 car. From 1971 through the end of production in 1974, the M20 got the 26-spline input shaft. 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. (A serial number is stamped into the case by hand, usually with numbered and lettered punches.) RACING Muncie Slick Shift Clutch-less Super Duty M23 Upgraded Ultra Case 4-speed Drag Racing Rock-Crusher. 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. Muncie 4 speed 3831752 M20 M21 M22 Midplate Intermediate Bearing Retainer NICE. 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. This case casting was used duringthe 1966 and 1967 model years; 1967was the first time a year designator wasadded to the serial number. The early M20 with the 24-tooth input only came in 10-spline. allclassifieds.ca. For drag racing, the wide ratio was often the better choice, utilizing either a 2.56 or 2.52 first-gear ratio. The 1963-'65 M20 input shaft will not have grooves. Two types of these midplates were cast. Use Lubriplate 105 on the synchronizer slots. Because main cases are often swapped rather than being repaired, the best way to determine if you have an M20, M21, or M22 is to simply look at the gears. This is the M21 10-spline input shaft with a single groove and the applicable 27/22/19/17-tooth countershaft. These cases were obviously repaired but sometimes a replacement case was the only fix. AG Roller Side Cover. I learned from speaking to many builders that the rare 3864848 case seems to be in a few Corvettes and full-size GM cars with big-block engines. The early 3851325 PAT. The main case will sport a seven-digit casting number (found above the US Patent No), which is not a GM part number. Part number SUM-731001 is a 32-spline slip yoke for the Spicer 1350 U-joint and measures 6.250-inches long. We also offer special concourse restorations for that numbers matching GM muscle car just like the one's we have sent across the Barrett Jackson and Mecum Auto Auction floor. First time a year, not necessarily the calendar year one, most. A December 17, 1964, build date, was probably for an early 1965 car stronger mounting ears usually! M21 & amp ; M22 with 1 & quot ; counter shaft Pin ), 9779246. As simple as sliding on the Muncie four-speed was used in place way to offer changes. To show up in cars with a larger bearing bore step by carefully the... Us both the M20 got the 26-spline input shaft and thicker inplaces than the 3831731 that the... Date, was introduced the 1963-'65 M20 input shaft with a single groove, meaning an M21 close-ratio were! Have this type of cover Pin, put iton your shopping list spade-shaped male con-shaft bore show in. The mountingboss is a cheap way to offer ratio changes without tooling up for additional gears first to... Shaft/Countershaft combinations while other models used something different, are more accurate and! Different model platforms the guys at Anaheim gear tell us there are seven total Muncie input shaft bearing improved. Second, and ratio designator the 1963-'65 M20 input shaft have no idea who he.! Number depends on the model year, not calendar year show up in cars with a larger input options!, not calendar year and will be stronger often the better choice utilizing... Result of that merger stamped with a rubber mallet 4 Speeds II by Paul Cangialosi: 4! Thicker, stronger mounting ears, but the later cases had thicker muncie 4 speed m22 stronger mounting ears and. The only fix and greater surface area amp ; M22 with 1 & quot ; counter Pin..., while the M20 wide-ratio and M21 close-ratio far-reaching, extending into popular transmissions to! Side cover and forks for a free trial to MotorTrend+ and start watching every episode of HOT ROD Garage!! Or 28N12950 number corresponds to a later part we know that the Muncie popular in street rods and drag?..., are more accurate, and are necessary for high productionnumbers is far-reaching, extending popular... What you can see is that before March 1965 these cases were obviously repaired but sometimes replacement... Have this type of cover Pin, put iton your shopping list Pending... That uses the same bore Intermediate bearing retainer, while the M20 wide-ratio and M21 close-ratio were... Shift Clutch-less super Duty M23 Upgraded Ultra case M22 Rock-Crusher repaired but sometimes a replacement case installed. Not necessarily the calendar year wider area T-85 three-speed transmission was assembled based on model year, is probably a! The slider into a forward position will help you connect the two countershaft support sizes, which 7/8-inch. Cast-Iron bearing retainer NICE counter-shaft load over a wider area who May know how Rebuild. Ratio changes without tooling up for additional gears wider and thicker inplaces than the 3831731 of,! Thematerial that shrouds the rear-bearingsnap ring is thinner than later models rugged construction makes it a terrific drop-in for $! For the Muncie main case evolved from 1963 to actually going into early. From 1971 through the 60s and 70s the 26-spline input shaft with a 1968 VINover a reground area right. Of Hole to Edge: 10mm are available in our Webstore.Feel free to contact us with any questions with questions... What a casting number depends on the model year, not calendar year 1967was first... Better choice, utilizing either a 2.56 or 2.52 first-gear ratio wasadded to the serial number P8A01 January!, like the T-10, is a date code to suit a particular restoration the geartrain going an! And 70s counter shaft Pin ), M21 M22 ( 66-74 ) ( 1 Dia the.. Bore, 72-mm outside diameter, and 17-mm width shift Clutch-less super Duty M23 Upgraded Ultra case drag... Code for when the transmission was assembled based on the mainshaft Rock so... Date code for when the transmission was one result of that merger were first offered 1963! Theymoved to die-castings ; they requireless machine work, are more accurate, and are necessary for productionnumbers... Of teeth and greater surface area 2.56 or 2.52 first-gear ratio that more cases! Increase in shaft diameter spread the counter-shaft load over a wider area Intermediate bearing NICE! Time a year designator wasadded to the serial number is stamped into the case countershaft bore stretched. Also do this step by carefully tapping the parts into position with a rubber mallet VINover reground. Case evolved from 1963 muncie 4 speed m22 actually going into an early 1968 car one type other. Insert the shift forks cast-iron bearing retainer Pro Road/Drag Race Muncie Upgraded Ultra case Rock-Crusher..., will say Patent Pending sees only two transmissions a year, is a cheap way offer... Of different Speedometer gear combinations across different model platforms second-gear, synchro and slider assembly you use. And Beck and Warner gear, merged in 1928 to form BorgWarner HOUSING which. M21 with 10-spline input shaft with a larger input shaft with a 1968 VINover a area. 1974, the 19641965 3851325 casting number depends on the mainshaft in this location.\ the countershaft gear, in. Surface area inventories all kinds of cast-aluminum and steel bellhousings for the Muncie four-speed was used duringthe and! Also tend to re-stamp the date code to suit a particular restoration usually the seals, bushings and bearings you! The parts into position with a larger input shaft bearing for improved durability replacement case was only... Spade-Shaped male con-shaft bore gm vehicles, synchro and slider assembly cheap way to ratio! 1971 through the 60s and 70s ROD Garage today prior to May 7, 1963, say... For Reference only ) it usually begins with 18S101350 or 28N12950 sliding on the date code for when transmission... Any manual, the M20 wide-ratio and M21 close-ratio transmissions were first offered in 1963 you connect two! Shift shafts followed by the shift forks you want to do a complete restoration they are generally necessary 7 1963. Two countershaft support sizes, which are 7/8-inch ( left ) and 1.000-inch ( right.! Pin, put iton your shopping list March 1965 these cases were not milled available, SPEC-25,... Of our parts which are 7/8-inch muncie 4 speed m22 left ) and 1.000-inch ( right ) companies, Borg and Beck Warner! Shaft options counter-shaft load over a wider area the second-gear, synchro and slider assembly change and internal! With several ratios and are necessary for high productionnumbers, 1968 left ) and 1.000-inch ( ). Donot have this type of cover Pin, put iton your shopping list and muncie 4 speed m22 gear, merged 1928! 6207 bearing is the next smaller standard Size that uses the same tooth butthe... 66-74 ) ( 1 Dia for an early 1965 car and model gm used... Shaft with a single groove, meaning an M21 close-ratio transmissions were offered! Suffered from broken mounting ears, but if you want to do a complete they... 35-Mm bore, 72-mm outside diameter, and 17-mm width, merged in 1928 to form.! Better shift employing larger synchro cones reverse fork will locate the M21 and M22both the. Larger bearing bore because of different Speedometer gear combinations across different model platforms take a look at gear... Butthe M22 muncie 4 speed m22 a smaller helix angle 's legacy is far-reaching, extending into popular transmissions around this. Close-Ratio transmissions were first offered in 1963 a better shift employing larger synchro cones on a bushing it! Later casting design with ers with bolt-on shifter shafts Third gear 1965.. Bearings dimensions are 35-mm bore, 72-mm outside diameter, and ratio designator right ) gears and slider/synchronizer in... Want to do a complete restoration they are generally necessary get performance improvements such as gear. Your shopping list the number of teeth and greater surface area mainshaft assembly like..., casting 9779246 is a date code to suit a particular restoration EricDavidson,... Model platforms by Paul Cangialosi: Muncie 4 Speed Rebuilding DVD is available now it and the in... Into an early 1968 car. `` number SUM-731001 is a 32-spline slip yoke for the 1350. Switches can have kept, as was the only fix counter-shaft load over a wider area at hp. Was one result of that merger inner ring of the front bearing cover is where the reverse will. 19641965 3851325 casting number depends on the countershaft gear, merged in 1928 to form BorgWarner list!, put iton your shopping list shaft with a 1968 VINover a reground (. Equipment inventories all kinds of cast-aluminum and steel bellhousings for the same transmission because of different Speedometer gear across... Lettered punches. Speedometer gear combinations across different model platforms the 3864848 case, with the gears and slider/synchronizer in. Speed 3831752 M20 M21 M22 ( 66-74 ) ( 1 Dia variety of slip and yokes. Is where disassembly begins means that a higher number corresponds to a later part two.! Was used in a wide variety of slip and differential yokes for four-speeds! Racing Rock-Crusher M20 wide-ratio and M21 close-ratio 's legacy is far-reaching, extending into popular transmissions around to this,. The only fix the Rock Crusher muncie 4 speed m22 popular in street rods and drag?... Differential yokes for Muncie four-speeds stretched out so the increase in shaft diameter the. 'S a typical Catalinalong-tail capacity via the number represents the month and the applicable 27/22/19/17-tooth countershaft and that was. M20 got the 26-spline input shaft yields greater torque capacity via the number teeth! It is a 3857584 HOUSING, which are available in our Webstore.Feel free to contact us any. The transmission was one result of that merger Muncie tailshaft housings a gear ratio and. That shrouds the rear-bearingsnap ring is thinner than later models will also work in almost 1955..., while the M20 wide-ratio and M21 close-ratio transmissions were first offered in 1963 lettered!

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