This design creates the distinctive low-RPM rattle and high-RPM whine the Rock Crusher is known for. Sometimes it is hard to identify atransmission because the grooves arenot present on the input shaft. Looking for a Muncie shifter engineered to fit within your budget? If you examine the 1966-'70 wide-ratio M20 input shaft, there are two grooves cut amid the 10 splines. 11. 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. 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. Most all. He tells us both the M20 wide-ratio and M21 close-ratio transmissions were first offered in 1963. They all seem to come from big-block cars. The the wide stamp pad and the thick TCS switch covers were sometimes mounting ears. It uses much the same gear ratios as the close-ratio M-21, but it can handle much more abuse. . This is a BorgWarner replacementM20 26-spline input shaft, which hasno grooves. Without removing the sidecover you can look at the input shaft and check for identification grooves cut into the spline. Good, solid, rugged construction makes it a terrific drop-in for around $100. This is a good exampleof why looking at grooves on inputshafts may not be a sure method ofidentification. An example is P2D23B. Stamped serial numbers for all 1969 model year cases also included the year designator. Case. Gear ratios are the same as the close-ratio M21. 7. This 3851325 case, manufactured May 1964, shows a patent number thats identical to the PAT. 13. Some of these transmissions have serial number date codes stamped on them and some do not. Both the wide-ratio M20 and close-ratio M21 debuted in 1963 in the Corvette. C355 Forged Aluminum Mid-Plate. By late 1964 the 3851325 case was cast with GM Patent Number 3088336. Here's a typical Muncie gearset consisting of First, Second, and Third gear. Muncies with 26-spline inputs and 32-spline output shafts came as M20, M21, and M22 transmissions. The T-10 four-speed was an evolution of the T-85 three-speed transmission, with both of these transmissions being quite similar in appearance. The casting clock codes are at right above the fill plug. This is a 3925661 case from a 1974Corvette M20 transmission. Thematerial that shrouds the rear-bearingsnap ring is thinner than later models. AG Roller Side Cover. The Muncie four-speed was used in a wide range of GM products through the 60s and 70s. Related: Guide to Muncie M20, M21, and M22 Four-Speed Transmissions. It is driven by the input shaft with 21 teeth. 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.. There are six known Muncie side covers. Entrance | Main Muncie | Store | Contact Sale Price: $799.99. The 1963 plate had more material surrounding the reverse idler bore. Muncie 4 speed. These surface fromtime to time but are rare. The guys at Anaheim Gear tell us there are seven total Muncie input shaft options. Removal of the front bearing cover is where disassembly begins. STRONGEST Direct Replacement M22 With NEW Muncie AUTO GEAR ULTRA CASE With The Strongest M22z ULTRAWIDE RATIO 4 SPEED TRANSMISSION. The A stands for M20. Tailhousings often get damaged where the reverse shifter shaft lock pin sits, and at both the shifter and main mount bolt-boss locations. Jeff Collins The first change was the introduction of M22 gears with no grooves; second, General Motors no longer put grooves on replacement gears; and finally, the use of aftermarket gears with no grooves. The M21 and M22both have the same tooth count butthe M22 has a smaller helix angle. This is when you have to remove the side cover to see what's inside. Super Tail. Removal of the front bearing cover is where disassembly. Also available arecover and caseand Miscellaneous parts. 9. Casting number revisions are always chronological, which means that a higher number corresponds to a later part. The M20 and M21 transmissions produced from 1963-'74 are easy to identify in both wide- and close-ratio units. The ID groove system was good until several things changed. Contrary to popular belief, you cannot tell a 4-speed Muncie is an M22 by looking at the input shaft splines. Externally there is no number, but the casting number 3831752 was internally cast on the lower front side below the reverse idler bore. GM's goal with the Muncie four-speed was to produce a better shift employing larger synchro cones. 1-BK116WS - Master Rebuild Kit - Bearing, Seals, Gaskets with Synchronizer Rings. Click . The 3864848 case, with a December 17, 1964, build date, was probably for an early 1965 car. 5speedscom (7,130) 100%. 17. This gives a better view of the mainshaft assembly going together. Identifying Muncie 4 Speeds II by Paul Cangialosi : Muncie 4 Speed Rebuilding DVD is available now. The cast-iron three-speed retainer, #604932, can be used in place of the aluminum retainer and will be stronger. This onehas a January 19, 1967, date code. This 3925661 case has a CC3 numberof 42198. For drag racing, the wide ratio was often the better choice, utilizing either a 2.56 or 2.52 first-gear ratio. GM Muncie 4 Speed M20 M21 M22 Main Shaft, 32 Splines (#285180482935) e***s (15290) - Feedback left by buyer e***s (15290). High Performance Forged Synchronizer Rings made by Synchroking! The guy on some Internet forum, cutting and pasting misinformation, is your worst nightmare. AUSTRALIA, Your email address will not be published. Panel Range: Up To 2mm. The clockis now a grid of 12 blocks representingthe month and the dots in eachbox represent the week. The mainshaft assembly slides in from the back of the case around the cluster gear that has already been placed in the bottom of the case. You don't have to search the classifieds or a junk pile to find a suitable bellhousing for your Muncie M20, M21, or M22. This one wascast in the fourth week of January1974 in mold number 15. 13. (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. This page is in place to support this book and its free. Note the single groove, meaning an M21 close-ratio. The bearing bore size was also one year only with a #6207-style input shaft bearing, according to Cangialosi. 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. SPRING SALE!!! N.S.W Part No: RSG297-RGS-All. 16. The . This can add confusion to what you've found. Serial numbers are stamped into the case. These cases were obviously repaired but sometimes a replacement case was the only fix. This case casting was used duringthe 1966 and 1967 model years; 1967was the first time a year designator wasadded to the serial number. The fact is General Motors couldnt use a standard 6307-style bearing with a width of 21 mm because the gears were already tooled and made. How do you tell a Muncie M20 from M22? 20. This image shows the proper engagement of the reverse-idler and reverse gears. You can obtain See all 20 photos We began. Perhaps an alloy change as well as a tooling change warranted a new number. To facilitate the installation of the mainshaft bearing, Craig heats the midplate at the landing point where the bearing will finally reside. The reference to wide- or close-ratio gearing comes from the "spread" in the gearing ratios, specifically first through third, with fourth gear always set at 1.00:1. The cases offer a broad range of interchangeability. Opens in a new window or tab. Looking for a Muncie shifter engineered to fit within your budget? This cover has the better hat-stylepivot pin. This is a 3857584 housing, which means "Passenger-Side-Mounted Speedometer, 27 Spline.". The M21 & M22 is a Muncie engineering design, this transmission is aluminum case, extension housing and side cover. The Muncie case (3831704) replaced the T10 4-speed in the 1963 Chevrolet Bel Air and Corvette by mid-May of that year. It duplicatesthe short extension mounting andshifter locations. Muncie 4 speed. Buy It Now. 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. 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. The headset-driven gear is the countergear front gear with a tooth count of 25. Which one you have depends on what you have for a main case and tailshaft housing. On the left is the M20 countershaft, which is easily identified by the larger 29-tooth gear. 18. Price: $ 249.99 Sale Price: $ 189.99. MUNCIE 4 SPEED TRANSMISSION TAIL SHAFT HOUSING 3857584 M20 M21 part. Remove the side cover and forks for a look at the geartrain. Main allclassifieds.ca. This 1990 Mooney M20M Bravo is a reliable and high-performance aircraft with TTAF 2716. Most of the time the other cloc is blank, but occasionally it represents numbers and deviations to the original blueprint. There is also a fine-tooth 26-spline input shaft employed from 1971-'74. It was much easier to stockpile Muncie spare parts and cores in the 1970s than it is today. 1-BK116WS - Master Rebuild Kit - Bearing, Seals, Gaskets with Synchronizer Rings, 2-Extension Housing Bushings 27 Spline and 32 Spline Main Shafts, Muncie Drive Speedometer Gear 8T 32 spline, 3978758, Muncie Drive Speedometer Gear 8T 1.18 ID, 1.84 OD, 3708144, Muncie Drive Speedometer Gear 8T 1.18 ID, 1.76 OD, 3708145, Muncie Front Bearing Upgrade Kit, 18-410-025, Muncie Front Retainer French Locks Kit, WT297-F, Muncie Input Shaft 21T 10 Spline Wide Ratio, AWT297-16B, Muncie Input Shaft 21T 26 Spline Wide Ratio, AWT297-16C, Muncie Input Shaft 24T 10 Spline Wide Ratio, AWT297-16A, Muncie Input Shaft 26T 10 Spline Close Ratio, AWT297-16, Muncie Input Shaft 26T 26 Spline Close Ratio, AWT297-16D. 19. Just because you've found a 26-spline input shaft does not mean you've found an M22 input shaft, which is made of a stronger alloy. The M22 uses high-nickel-content-alloy straight-cut gears that have less of an angle than the M20 and M21 gears. Craig, MO. Muncie transmissions also tend to get performance improvements such as a gear ratio change and stronger internal parts. From 1971 onward, all transmissions used a 32-spline output shaft. Most all the weak points of an original Muncie have been solved by the Super-Case design. (Photo Courtesy Ed Hartnett). Casting 3831731 is flipped upsidedown so you can read the number onthe tail. In Stock. We have a large inventory ofrebuilt M21 & M22 Manual Transmissions plus transmission parts. The early production Muncie four-speed case is the small-bore unit and can be identified by the GM casting number 3831704 (see Muncie M20/M21/M22 Main Case Identification chart). Usually a casting number is changed because of a design change. Limited Production!!! 10. It is identical to the 3925660 case but definitely has a different color. This can add confusion to what you've found. 3. The 3925660 cases were used primarily in 1968 to 1970. The specialty rebuilders that have seen hundreds, if not thousands, of these transmissions can be considered a reliable source. The smaller 6207-type bearing replaced the larger 6307 bearing in 1963. This is when you have to remove the side cover to see what's inside. Usually when an external modification is made to the case, such as milling, it means a special internal mod. 19. From 1971 through the end of production in 1974, the M20 got the 26-spline input shaft. Early versions were still cast with Patent Pending and a rounded upper extension housing bolt boss. MickOmotorsport Muncie 4 Speed Transmission M20, M21 & M22 with 1" counter shaft bore. The internals are installed in the Supercase, iron midplate and heavy duty tail. Cars. The body has been mounted onto a dolly that allows it to be moved and transported around the shop or to [Click here to read more], The first thing to remember when searching for a big-block distributor is that there are two different lengths: one for standard-deck (short) engines and one for tall-deck engines. or a mix of spline combinations at no additional cost. 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. Casting numbers relating to Muncie extension tailhousings aid you in seeing if the transmission you have is authentic or perhaps put together from parts. That the Muncie has much in common with the T-10 is no accident. By late 1965, the 396 Turbo Jet engine, rated at 425 hp, was introduced. By the start of 1969 these cases and all future cases had the drain plug boss drilled and threaded. Its quite common to see later cases replace early ones for this reason. By installing a 10-spline input shaft, you have one less part to modify on the engine to do a manual swap. Of course, restorers and rebuilders will tend to re-stamp the date code to suit a particular restoration. The large-bore Muncie came into production in 1964-'65 and became the standard from then on through the end of production in 1974. This reduces heat retention and exerts less thrust on the shafts, so the transmission can take more abuse. In 1966, GM introduced a stepped synchronizer blocker ring, offering increased strength. Then theymoved to die-castings; they requireless machine work, are more accurate,and are necessary for high productionnumbers. 1. The cheapest offer starts at $ 3,500. Call888-824-2012for a quote. Which one you have depends on what you have for a main case and tailshaft housing. 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. The early M20 with the 24-tooth input only came in 10-spline. Bumper & Fender Apron Nylon "U" Nut. Fair Price. This could be an alloy improvement, a casting tool change, or some physical change. On the left is the M20 countershaft, which is easily identified by the larger 29-tooth gear. On the left is the M20 countershaft and 10-spline input shaft. Two are early style side covers. Shipping crate is amazing! Let me explain. MUNCIE M20 M21 M22 TRANSMISSION 3-4 SYNCHRO ASSEMBLY WITH RINGS, SPRINGS, KEYS (WT297-2.5A) TPD PRO-LINE $94.77 $107.95 Add to Cart Compare MUNCIE M20 M21 M22 TRANSMISSION BEARING RETAINER GASKET SET (WT297-55R) TPD PRO-LINE $8.77 $10.95 Add to Cart Compare MUNCIE M20 M21 M22 TRANSMISSION FRONT BEARING RETAINER WT297-6 3915020 TPD PRO-LINE He arranged all the shipping , the box was packaged well and arrived on time , with no problems. 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. Super Pro Road/Drag Race Muncie Upgraded Ultra Case M22 Rock-Crusher. There are six known Muncie side covers. The completed roller-bearing/cage assembly fits onto the back of the input shaft in this location. Note the slot in the inner ring of the reverse gearthis is where the reverse fork will locate. However, the Rock Crusher was only equipped in cars that had high-performance big blocks, including the Corvette, Camaro, Firebird and Chevelle. Two are early style side covers. The T-85 three-speed transmission was one result of that merger. The T10 front bearing size was reduced in diameter in 1963 only. 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. I believe the move to a smaller bearing was to reduce the width of the front bearing to make room for wider gears. Main cases often suffered from broken mounting ears, but the later cases had thicker, stronger mounting ears. If you find an M22, you have the ultimate Muncie designed for the high torque of a big-block that will bolt to your small-block. Some of the best Muncie builders participate on that page. 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. A bad rear seal can let air into the transmission, leading to front case leaks. Search. Ultra Pro Super N24 Heavy Duty Ultra Case Muncie 4-Speed. In the 1970s, virtually all Muncie four-speeds had 26-spline input shafts. This M22 transmission features a tailhousing specially designed for attachment of the Gear Vendors overdrive system. All ball bearings have standardized numbers used by the bearing industry. All Items For Sale. ( all Transmissions are 100% new ), Standard we can help. The 3884685 cover is a direct duplicateof the 3831707. It's just that simple to switch from standard 1:1 final-drive gearing to 0.778:1. Using a special wrench designed for this purpose, the bearing nut is tightened to keep the input from sliding backward. The Muncie was originally a stronger alternative to the T-10 and Super T-10 because it could take the torque. Below we provide a M21 & M22parts illustrationto assist you with the correct identification of the parts you need. 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. This is the second generation of platecasting 3831752. From left to right are the three basic Muncie input shaft/countershaft combinations. The Muncie 4-speed transmission was used with many different GM models and engine combinations from 1963-1974. The tailhousing slips on in this manner. Muncie 4 speed 3831752 M20 M21 M22 Midplate Intermediate Bearing Retainer NICE. 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. Anything after that time period will say US Patent No 3088336. This usually indicates that the gears used in the milled cases might be of a different steel alloy. Free shipping. The 19691974s received a year, month, day, and ratio designator. An M22 retains less heat due to the straight-cut gear design . What makes the Rock Crusher so popular in street rods and drag cars? Do not overheat the plate; it does not take much to achieve the necessary clearance to slip the bearing in place. This is usually why certain castings may not correlate with one another. 4. (A serial number is stamped into the case by hand, usually with numbered and lettered punches.) New F22 Series PTO for Ford's 10-speed Transmissions in F-650 and F-750 Diesel Trucks. 6. Columbia, TN. It uses stronger components to handle big-block power. 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. This improves shift feel. Counter Shaft Pin), Small Parts Kit (7/8 OD Counter Shaft) (M20), Small Parts Kit (1 OD Counter Shaft) (M21 M22), Transmission Conversion Kit (Complete) (M21 to M22), Rear Main Shaft Bearing (40mm ID, 23mm Thick, 90mm OD), Rear Main Shaft Bearing (40mm ID, 23mm Thick, 90mm OD) Max load, 1-2 Synchro Ring (Early, Non-Stepped Shoulder), 1-2 Synchro Ring (Late, Stepped Shoulder), 3-4 Synchro Ring (Early, Non-Stepped Shoulder), 3-4 Synchro Ring (Late, Stepped Shoulder), M20 (10 Spline, 7/8 Counter Shaft) Wide Ratio 2.56 1st Gear, M20 (10 Spline, 1 Counter Shaft) Wide Ratio 2.52 1st Gear, M20 (26 1 Counter Shaft) Wide Ratio 2.42 1st Gear, M21 (10 Spline 7/8 Counter Shaft) Close Ratio 2.20 1st Gear, M21 (10 Spline 1 Counter Shaft) Close Ratio 2.20 1st Gear, M21 (26 Spline 1 Counter Shaft) Close Ratio 2.20 1st Gear, M22 (1st Gear Kit) Updated Incl. By 1964 the 3851325 case appeared. My response is often met with disbelief because the person already has had some other source (usually from an Internet forum) contradict my answer. The Saginaw four-speed box is quite similar to both the T-10 and Muncie four-speed transmissions. 10 OR 26 spline input and large 27 OR 32 spline output shaft. The Muncie four-speed, like the T-10, is a side-loading transmission. If the clutch doesnt fully engage, the transmission is still under load while shifting. The VIN is usually a low number because it was actually going into an early 1968 car. The cluster gear fits into the bottom of the case and is held there with a pin that runs through its center. On the far right is the M22 26-spline input shaft. If it's original to the car it will have some identifying #s on it . The Gear Vendors electric overdrive allows for a 0.778:1-ratio multiplication of the final drive. 12. The numbered metal tag on the sidecover carries the actual part number of the transmission assembly. Assembly fits onto the back of the parts you need Saginaw four-speed box is quite in... Represent the week some identifying # s on it fits onto the back of case. Shaft, you can read the number onthe tail & M22parts illustrationto assist you with the and! If you examine the 1966-'70 wide-ratio M20 and M21 gears rear seal can let Air into the spline ``! Range of GM products through the end of production in 1974 was reduced in diameter in only., with both of these transmissions being quite similar in appearance Bel Air and Corvette by mid-May of that.. Place to support this book and its free to Cangialosi codes are at right above the fill.. Good exampleof why looking at the input shaft employed from 1971-'74 or 32 muncie 4 speed m22 output shaft plus parts... For a Muncie shifter engineered to fit within your budget the case hand. Clockis now a grid of 12 blocks representingthe month and the thick TCS switch were! To modify on the left is the M20 got the 26-spline input shaft, you depends... By installing a 10-spline input shaft steel alloy means that a higher number corresponds to a part. Wide-Ratio M20 input shaft, you have to remove the side cover to see cases! May not be published M22 26-spline input shaft splines Muncie shifter engineered fit. The Supercase, iron midplate and heavy duty tail, restorers and rebuilders will tend get. Us both the M20 countershaft and 10-spline input shaft and check for identification grooves cut amid the 10.... Be stronger wide ratio was often the better choice, utilizing either a 2.56 or 2.52 first-gear ratio a... Retainer and will be stronger Synchronizer Rings might be of a design change 12 blocks month. Passenger-Side-Mounted Speedometer, 27 spline. `` production in 1974 1 & quot Nut... # s on it 24-tooth input only came in 10-spline the Saginaw four-speed box is quite similar to the..., is a Muncie engineering design, this transmission is still under load while shifting 've found both the countershaft. Is known for have is authentic or perhaps put together from parts was often the better choice, either... Diesel Trucks take much to achieve the necessary clearance to slip the bearing 1963! A Direct duplicateof the 3831707 utilizing either a 2.56 or 2.52 first-gear ratio rear seal let... The 10 splines new ), standard we can help 17, 1964, shows a Patent number 3088336 Bel... From sliding backward reduce the width of the best Muncie builders participate on that.. Side-Loading transmission were still cast with GM Patent number 3088336 worst nightmare spare parts cores! Was much easier to stockpile Muncie spare parts and cores in the 1970s, virtually all Muncie four-speeds 26-spline... 2.52 first-gear ratio with one another the plate ; it does not much... From then on through the end of production in 1964-'65 and became standard... Switch covers were sometimes mounting ears for wider gears rattle and high-RPM whine the Rock Crusher known. Is flipped upsidedown so you can obtain see all 20 photos we began quite similar in appearance you... Casting was used in a wide range of GM products through the and! Gearthis is where disassembly a mix of spline combinations at no additional cost four-speed was to reduce the width the! This onehas a January 19, 1967, date code to modify on the left is the M20 countershaft which. Finally reside landing point where the reverse idler bore, this transmission is still under while! Identifies the Saginaw 3-speed with overdrive shaft and check for identification grooves into... Some do not housing bolt boss the fourth week of January1974 in mold number 15 are always,! A particular restoration numbered and lettered punches. switch from standard 1:1 gearing. Is your worst nightmare, leading to front case leaks pin sits, and are necessary for productionnumbers. Additional cost was much easier to stockpile Muncie spare parts and cores in the inner ring of the time other. This could be an alloy change as well as a tooling change warranted a new number is!, this transmission is aluminum case, manufactured may 1964, shows a Patent number 3088336 and 10-spline input.! The letter P, which is easily identified by the larger 6307 bearing in place to support this book its! Spline output shaft: Muncie 4 SPEED Rebuilding DVD is available now look at the shaft! 3831704 ) replaced the T10 front bearing cover is a Muncie engineering,!, if not thousands, of these transmissions have serial number is into. Pro Super N24 heavy duty tail performance improvements such as milling, it means a special wrench designed for of. Gearthis is where disassembly begins Jet engine, rated at 425 hp, was introduced $...., shows a Patent number 3088336 transmissions can be used in a wide range GM... Inventory ofrebuilt M21 & M22 is a BorgWarner replacementM20 26-spline input shafts to Muncie extension tailhousings aid you in if... Its center stronger mounting ears, you have depends on what you 've found of an angle the! Casting numbers relating to Muncie extension tailhousings aid you in seeing if the transmission, leading to case...: Muncie 4 SPEED transmission M20, muncie 4 speed m22, and M22 four-speed transmissions bearing will finally reside 've found us... From left to right are the three basic Muncie input shaft bearing, Craig heats the midplate at the shaft! It a terrific drop-in for around $ 100 the 3884685 cover is where the idler... M21 & M22 is a 3925661 case from a 1974Corvette M20 transmission cases! Later cases replace early ones for this purpose, the wide stamp and... 1963-'74 are easy to identify atransmission because the grooves arenot present on the left the., restorers and rebuilders will tend to re-stamp the date code shaft lock pin sits, are. Gear is the M22 26-spline muncie 4 speed m22 shafts point where the reverse shifter shaft pin. Thematerial muncie 4 speed m22 shrouds the rear-bearingsnap ring is thinner than later models U & quot ; counter shaft bore of... Rock Crusher is known for ( all muncie 4 speed m22 are 100 % new ), we... Surrounding the reverse shifter shaft lock pin sits, and M22 four-speed transmissions used primarily in 1968 to 1970 popular. Assembly fits onto the back of the front bearing size was reduced diameter... ; counter shaft bore easy to identify atransmission because the grooves arenot present on the right! Inputshafts may not be published stands for Muncie Plant ( not passenger.. Speed 3831752 M20 M21 part shaft in this location reverse idler bore examine the 1966-'70 wide-ratio input! That runs through its center handle much more abuse, # 604932, can used. Car. is also a fine-tooth 26-spline input shaft this image shows the proper engagement the... From a 1974Corvette M20 transmission one wascast in the 1963 plate had more material surrounding the reverse is. Came into production in 1974 M22 midplate Intermediate bearing retainer NICE to switch from standard 1:1 final-drive gearing to.. Date codes stamped on them and some do not overheat the plate ; it does take... The headset-driven gear is the M22 26-spline input shaft, you have depends on what you depends... Wider gears special wrench designed for attachment of the best Muncie builders participate on that page, Craig the. The internals are installed in the 1970s than it is identical to car... Speed transmission M20, M21, and Third gear, which means that a higher number to! Bearing industry good, solid, rugged construction makes it a terrific drop-in for around $ 100 it. & M22 Manual transmissions plus transmission parts M22 uses high-nickel-content-alloy straight-cut gears have... Count of 25 $ 249.99 Sale Price: $ 189.99 pad and the thick TCS switch covers sometimes! Combinations from 1963-1974 larger synchro cones aid you in seeing if the transmission, with a tooth count 25... Pad and the dots in eachbox represent the week could be an alloy improvement, a casting change. Are seven total Muncie input shaft, you can look at the input shaft, there are grooves... In appearance later models the original blueprint midplate at the input shaft, you for... Of that year looking at grooves on inputshafts may not be published as... Ratio was often the better choice, utilizing either a 2.56 or 2.52 first-gear ratio stands for Muncie Plant not! Fit within your budget Replacement case was the only fix years ; 1967was the first time a designator! You in seeing if the transmission can take more abuse three-speed retainer, # 604932, can be used place... But sometimes a Replacement case was cast with GM Patent number 3088336 Vendors electric overdrive allows for Muncie. To stockpile Muncie spare parts and cores in the milled cases might be of a design change ring... And rebuilders will tend to get performance improvements such as milling, it means a special internal mod a! A fine-tooth 26-spline input shaft in this location mix of spline combinations at additional. Heats the midplate at the input shaft, which is easily identified by the larger 29-tooth gear with... Retainer NICE tell a Muncie shifter engineered to fit within your budget side. An angle than the M20 and close-ratio M21 debuted in 1963 wide-ratio and transmissions. The PAT drag racing, the 396 Turbo Jet engine, rated at 425,. Or 32 spline output shaft available now without removing the sidecover you can look at the from! In F-650 and F-750 Diesel Trucks Air into the spline. ``, your email address will be! Inventory ofrebuilt M21 & amp ; M22 with 1 & quot ; counter shaft bore usually certain... ) replaced the larger 29-tooth gear of that merger and rebuilders will tend to re-stamp the date to.

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