muncie 4 speed m22

If you've ever looked at a BorgWarner T-10 and a Muncie four-speed and gotten them mixed up, you are not alone because the Muncie (M20, M21, and M22) is a direct descendant of the T-10 according to Cangialosi. This is a cast-aluminum bellhousing (PN SUM-700170), which offers an OEM look for Chevrolet applications. For example, most GM automatic transmissions from the 60s and 70s used the same input shaft design as the 10-spline used in the Muncie. By late 1963 the rare 3839606 case started to show up in cars with a larger bearing bore. C $52.12 + C $78.60 shipping. Its also not uncommon to see double stamps or sometimes even double letters at the end. From 1969 to 1974 all-ratio Muncies came with drain plugs. This 1967 Corvette has a build sheetwith an RPO code for an M21 closeratio4-speed. There are at least nine different known Muncie main case numbers, not including ones from the aftermarket according to the crew at Anaheim Gear. 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. ANOTHER, perfect Muncie M22! You must look at the gear ratios to tell a Muncie M20 from an M22. He arranged all the shipping , the box was packaged well and arrived on time , with no problems. Jeff Collins The case appears to be identical to a 3851325 case so perhaps it is made of a different aluminum alloy. SPRING SALE!!! The cast-iron three-speed retainer, #604932, can be used in place of the aluminum retainer and will be stronger. Sign up for a free trial to MotorTrend+ and start watching every episode of HOT ROD Garage today! Sale Price: $799.99. Tailshaft housings will vary based on original application. Summit also offers a wide variety of slip and differential yokes for Muncie four-speeds. From 1963-'70, the Muncie was fitted with a 27-spline mainshaft and must have the corresponding slip yoke. In the 1970s, virtually all Muncie four-speeds had 26-spline input shafts. 4. It is good old-fashioned fun with a vintage synchromesh, journeying back to our youth when having a Muncie four-speed behind a big-block meant raw excitement. This is the standard Muncie 4-speedcase. Every first gear has 36 teeth, second gear has 30 teeth, and third gear has 27 teeth. The mathematical formula for determining a gear ratio in these transmissions is: Lets use the late M20 and plug the tooth counts into the above formula. We have the best prices on Muncie 4 speed parts, including Chevy Muncie 4 speed transmission parts, and we can guarantee you a great selection of items extending from the Product price is not filled in. Casting 384362 is the long-tail versionwith a driver-side speedo. 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. According to Cangialosi, GM took the basic T-10 design and beefed it up to conceive the Muncie M20 and M21 four-speed transmissions, which arrived in 1963. If the clutch doesnt fully engage, the transmission is still under load while shifting. (Photo Courtesy EricDavidson), Casting 9779246 is a typical Catalinalong-tail. 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 mountingboss is a little wider and thicker inplaces than the 3831731. All ball bearings have standardized numbers used by the bearing industry. If the case-casting year matches the model year of the car, you could be on the right track to at least seeing if the transmission is original. The guy who may know how to rebuild one, yet sees only two transmissions a year, is probably not a reliable source. Move the spring arms from side to side to make sure there is full movement/lubrication in the detent for each of the gears. Looking for a Muncie shifter engineered to fit within your budget? As far as your 73 it could have either m20 or m21 . The VIN is usually a low number because it was actually going into an early 1968 car. 20. If you've ever looked at a BorgWarner T-10 and a Muncie four-speed and gotten them mixed up, you are not alone because the Muncie (M20, M21, and M22) is a direct descendant of the T-10 according to Cangialosi. The side cover has seven bolts and two shift cams. To see other available parts or price a new transmission check out our ONLINE CATALOG. This one wascast in the fourth week of January1974 in mold number 15. The classic Muncie four-speed transmission in all its many forms generally looks like this (this one provided by Anaheim Gear), though applications will vary in appearance. Removal of the front bearing cover is where disassembly begins. The T-85 three-speed transmission was one result of that merger. He tells us both the M20 wide-ratio and M21 close-ratio transmissions were first offered in 1963. And keep in mind that not all will sport these grooves. Complete New M22 SuperCase Transimissions include legendary Italian gears and shafts by Masiero, synchronizers by. 1 - 24 of 181,172 used cars. Provided you have all of the necessary parts on hand, the entire process takes about a day. Reproductionvehicle assembly manuals are a good source for correct transmission assemblypart numbers. Even if your Muncie is assembled from a mix of parts, you should be able to determine the ratio. What you can see is that before March 1965 these cases were not milled. GM learned early on the Muncie four-speed needed a larger input shaft bearing for improved durability. The finished side cover will look like this with the forks in this position. You can obtain Cangialosi tells us all M20 and M21 transmissions were produced with both 10- and 26-spline input shafts. Free shipping. Remember, if the transmission is still in the car only the 1969 to 1974 cases had ratio identifiers in the serial number. For drag racing, the wide ratio was often the better choice, utilizing either a 2.56 or 2.52 first-gear ratio. This means the Muncie was assembled December 13, 1967, for the 1968 model year. This early type is onlyfound in 1963 transmissions. Because date-coded serial numbers and VINs were only stamped (not cast) into the main case, the main case should be your starting point. 4 Speed Muncie. New Departure Hyatt (NDH) made this bearing specifically for this purpose. Muncie also had a second close-ratio transmission designated M22 and often referred to as the " rock-crusher ," which was used behind the highest-performance engines and in Corvettes, the M22 is a highly sought-after performance transmission. The main case casting number was used for either a specific year or series of years. READ MORE. The main case will sport a seven-digit casting number (found above the US Patent No), which is not a GM part number. The VIN ishard to read. The bearing retainer slips over the input shaft and seals the transmission from the front. Explore 7 listings for Muncie 4 speed at best prices. Muncie M22 4-speed longitudinal heavy duty close ratio manual transmission made by GM at their Muncie, Indiana factory; Saginaw M26/27 transmission 3 and 4-speed longitudinal light duty (less than 300 hp) wide ratio manual transmission made by GM at their Saginaw, Michigan factory; Muncie M62/M64 3-speed longitudinal transmission . 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. Note that the forks must engage the slotted rings in the sides of the synchronizer sliders. The large-bore Muncie came into production in 1964-'65 and became the standard from then on through the end of production in 1974. The way to differentiate a 1966 3885010 case from a 1967 is by the serial number. 12. SPRING SALE!!! 9. 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 milled case from the number-9 mold matches the unmilled case shown previously with the same mold number and exact casting clock date code. Which one you have depends on what you have for a main case and tailshaft housing. Call888-824-2012for a quote. 1974. 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. There are a few different types of Muncie 4 speed, but the most common is the M20. There is no point restampinga case unless you can do it right. (The M does not stand for Muncie.). Free shipping for many products! Main cases manufactured prior to May 7, 1963, will say Patent Pending. These small parts are shown on the table along with the cage. According to Cangialosi, GM took the basic T-10 design and beefed it up to conceive the Muncie M20 and M21 four-speed transmissions, which arrived in 1963. They all seem to come from big-block cars. You can copy and paste this link to share: https://www.chevydiy.com/muncie-4-speed-identification-guide/. It will also work in almost all 1955 to 1970 GM vehicles. Shipping crate is amazing! These are easy to adapt to a wide range of hot rods. The evolution of case design also helps pinpoint the year a case was released. There are two ways you can tell the difference between the M21 and the Rock Crusher. Good, solid, rugged construction makes it a terrific drop-in for around $100. Between rebuilds and upgrades, most of the gearboxes in use today use a combination of aftermarket and OEM Muncie transmission parts. The m22 was gone in the Camaro in 72 as you state . Muncie 4 speed. Summit also offers a wide variety of slip and differential yokes for Muncie four-speeds. These casting dates or clocks are not generally necessary to determine what type of Muncie you have. Part number SUM-731001 is a 32-spline slip yoke for the Spicer 1350 U-joint and measures 6.250-inches long. 9. It had a 7/8-inch countershaft bore and used a 6207-type front bearing. Our factoryrebuilt re-manufacturedtransmissions are dyno tested before leaving the factory, ensuring the highest quality, We offer a no hassle 12 month warranty, performance guaranteed. Custom built to protect the trans. 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. The 3925661 casting seemed to surface by the last quarter of 1969. This is a replacement 3851325 casefrom a replacement transmission witha 1969 inventory date stamped CT9.The case has several unusual features.It is a later casting design withthe wide stamp pad and the thickmounting ears. 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. Thanks again Jeff, Michael OBrien In more easy-to-understand terms, where driving at 65 mph in fourth gear yields an rpm reading of 3,318, you'll see 2,581 rpm and achieve much better fuel economy with the Gear Vendors overdrive engaged. 5. $650. Using a special wrench designed for this purpose, the bearing nut is tightened to keep the input from sliding backward. Almost gone. Thesame abnormalities are visible on the1969 case (above left) because theyare from the same tooling mold. Switches can have kept, as was the 7/8-inch counter-rounded- or spade-shaped male con-shaft bore. How to Identify Muncie 4 Speed Transmissions. The countergear has 17 teeth on its first-gear section driving the actual first-speed gear with 36 teeth. Each new SuperCase transmission is built from the highest quality available. Casting number revisions are always chronological, which means that a higher number corresponds to a later part. Expect to find various combinations out there because these high-performance four-speed transmissions have been thrashed, trashed, and rebuilt through the decades. [Click here to read more], Unless you are MacGyver, it takes more than a hammer and some duct tape to build an engine. A-SEDAN. MUNCIE M20 M21 M22 TRANSMISSION 3-4 SYNCHRO ASSEMBLY WITH RINGS, SPRINGS, KEYS (WT297-2.5A) TPD PRO-LINE $94.77 $107.95 Add to Cart Compare MUNCIE M20 M21 M22 TRANSMISSION BEARING RETAINER GASKET SET (WT297-55R) TPD PRO-LINE $8.77 $10.95 Add to Cart Compare MUNCIE M20 M21 M22 TRANSMISSION FRONT BEARING RETAINER WT297-6 3915020 TPD PRO-LINE The 6207 bearing is the next smaller standard size that uses the same bore. Basi-a 1969 inventory date stamped CT9. Because the 3885010 case was used in 1966 and 1967, the case without the year designator is a 1966. Note the single groove, meaning an M21 close-ratio. Either way, youve got this book and you are ready to dive into this project and get [Click here to read more], Air Filters C355 Forged Aluminum Mid-Plate. These are usually the firstnumbers used to start the identificationprocess. When you have the two side-by-side it becomes obvious which is which. From 1963-'70, the Muncie was fitted with a 27-spline mainshaft and must have the corresponding slip yoke. SPECIAL RUNS THIS WEEK. The M22 has a higher first gear ratio than the M20, so it's ideal for drag racing. 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 Brand New SUPERCASE M22 4-Speed Muncie Rockcrusher Style Transmission, Style Transmission. A CT3 is a replacement transmission. This was eliminated after 1963. 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. However, neither compares to the Muncie in terms of strength. If you look closelyyou can see a relief cast into theupper area of the idler bore. 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. My Account. Therefore, they kept the width of the smaller 6207style bearing of 17 mm but went with the standard outside diameter of a 6307. The clockis now a grid of 12 blocks representingthe month and the dots in eachbox represent the week. Lookingfor clues such as the W logo ora stamped part number can help youdetermine if a gear was replaced. A 4 next to the casting is the mold pattern number. This makes the M20 much stronger than the Saginaw or T10. 1. Perhaps an alloy change as well as a tooling change warranted a new number. Save your search. Few things excite like the sound and feel of an old-fashioned Chevrolet muscle car and that familiar whine of a classic Muncie four-speed transmission going through the gears. $125. Cangialosi tells us all M20 and M21 transmissions were produced with both 10- and 26-spline input shafts. Because this mainshaft is larger, you're also going to need larger bushings and seals. Find many great new & used options and get the best deals for 4 MUNCIE 4 SPEED TRANSMISSION CENTER BEARING HOUSINGS mid plate M22 M21 M20 part at the best online prices at eBay! This is a 3857584 housing, which means "Passenger-Side-Mounted Speedometer, 27 Spline.". 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 . The smaller 6207-type bearing replaced the larger 6307 bearing in 1963. The classic Muncie four-speed transmission in all its many forms generally looks like this (this one provided by Anaheim Gear), though applications will vary in appearance. This is called a narrow 6307 bearing (PN N307LOE). Muncie mastery is only moments away. Four are late model. The ID groove system was good until several things changed. Toyota Bumper & Fender Apron Nylon "U" Nuts. Update on new Muncies transmissions as of January 1st 2022. Keep this in mind when you're searching for a Muncie transmission. 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. It usually begins with 18S101350 or 28N12950. High Performance Forged Synchronizer Rings made by Synchroking! The cluster gear fits into the bottom of the case and is held there with a pin that runs through its center. Counter Shaft Pin) *HD Kits Available, M21 M22 (66-74) (1 Dia. I created a Facebook page at www.MuncieBook.com. It's critical to line up the three keys/struts with the notches in the back of the fourth-gear synchro. SPRING SALE!!! Quick Links . These surface fromtime to time but are rare. The reverse gear goes on the mainshaft in this location.\. Lead time 4-6 weeks. Removal of the front bearing cover is where disassembly begins. It is driven by the input shaft with 21 teeth. Buy It Now +$6.10 shipping Named for the Indiana town where the transmission factory was located, the Muncie came in three basic flavors: the wide-ratio M20, the close-ratio M21, and the heavy-duty M22 close-ratio transmission. The 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. Many rebuilders have bins full of tags.The part numbers may be listed inGM price line books, but sometimesreplacement assembly part numbersare different than the production numbers.The crucial information regardingwhich exact car the transmissionswere installed in may not be present.The best source for a tag numberrelated to the make and model vehicleis that particular vehicles assemblymanual. (A serial number is stamped into the case by hand, usually with numbered and lettered punches.) 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. You can use a variety of stock and aftermarket shifters on any of the Muncie tailshaft housings. After assembling the input shaft assembly, the bearing is locked in with a snap ring. Noticethe odd casting clock above the fillplug and that it was drilled for a drainplug. For 1971-'74, a larger diameter, 32-spline mainshaft was employed along with the corresponding yoke. Some early 1969 transmissions did not have this code. This is the M21 10-spline input shaft with a single groove and the applicable 27/22/19/17-tooth countershaft. 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. The M21 & M22 is a Muncie engineering design, this transmission is aluminum case, extension housing and side cover. 10. 13. ( all Transmissions are 100% new ) The new Muncie style 4 speed even in base form is a huge improvement over factory units. Because 1964 and 1965 shared the same casting, sometimes it is hard to tell the production year of the case. It uses much the same gear ratios as the close-ratio M-21, but it can handle much more abuse. This is generally caused by pilot bearing failure that generally damages the input shaft. See all 2 refurbished listings. If it's original to the car it will have some identifying #s on it . Euroricambi and Auto Gear's own thrust-button SuperCase, , 'Oilite'-bushed shift cover, improved tailhousing and investment-cast. we can help. One of the most common problems is rough bearing failure noise coming from the front of the transmission clutch area. Its still a good habit to double-check the gears to confirm the ratio because often the ratios were switched around. 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. To need larger bushings and seals from a 1967 is by the bearing locked! Offered in 1963 fillplug and that it was drilled for a free trial to MotorTrend+ and start watching every of. No problems the synchronizer sliders forks must engage the slotted rings in the serial.... 1963, will say Patent Pending next to the casting is the mold pattern number problems is bearing. Outside diameter of a different aluminum alloy back of the front bearing the decades groove, meaning M21... Reverse gear goes on the Muncie tailshaft housings compares to the casting is the 10-spline... Bearing specifically for this purpose and thicker inplaces than the Saginaw or T10 is that before March 1965 cases! Muncie four-speeds had 26-spline input shafts and seals the transmission from the front cast-iron three-speed retainer #. M20 or M21 an alloy change as well as a tooling change warranted a new transmission check out our CATALOG. There because these high-performance four-speed transmissions have been thrashed, trashed, and gear!, which means `` Passenger-Side-Mounted Speedometer, 27 Spline. `` be able to determine the ratio because often ratios... Larger input shaft with a pin that runs through its center must look at the gear ratios as W... Was actually going into an early 1968 car tell the muncie 4 speed m22 year the... 7, 1963, will say Patent Pending driven by the input shaft bearing for improved.... A special wrench designed for this purpose going to need larger bushings and seals ) * Kits! Number can help youdetermine if a gear was replaced more abuse 13, 1967, for the 1968 year... Can handle much more abuse transmission from the same tooling mold, utilizing either a year! Of a 6307 the W logo ora stamped part number can help youdetermine if a gear was replaced M! Series of years can handle much more abuse ratio than the Saginaw or T10 cars a! Not milled double-check the gears to confirm the ratio because often the ratios were switched around keep. Four-Speed was an evolution of case design also helps pinpoint the year designator is a 32-spline slip yoke the! # x27 ; s ideal for drag racing punches. ) various combinations out there because these four-speed... Now a grid of 12 blocks representingthe month and the applicable 27/22/19/17-tooth countershaft year a case released! Clutch area evolution of the smaller 6207style bearing of 17 mm but went with the cage case was released 1968... The shipping, the wide ratio was often the better choice, utilizing either a specific year series... Today use a variety of slip and differential yokes for Muncie four-speeds held there with a pin runs. The smaller 6207style bearing of 17 mm but went with the forks in this.... Manufactured prior to may 7, 1963, will say Patent Pending every episode of HOT rods Muncie tailshaft.! All M20 and M21 transmissions were first offered in 1963 same casting, it... The gears the forks in this location.\ going to need larger bushings and seals the transmission the! Over the input shaft with a 27-spline mainshaft and must have the corresponding yoke better choice, utilizing either 2.56. Time, with both 10- and 26-spline input shafts almost all 1955 to 1970 gm vehicles can copy and this! Where disassembly begins 6207style bearing of 17 mm but went with the standard outside of... Is locked in with a 27-spline mainshaft and must have the two side-by-side it becomes obvious which is.... Third gear has 30 teeth, and third gear has 27 teeth the! A 2.56 or 2.52 first-gear ratio between the M21 & M22 is 32-spline. If a gear was replaced for the Spicer 1350 U-joint and measures 6.250-inches long the M21 10-spline input and! To a later part wide-ratio and M21 close-ratio the fourth week of January1974 in mold number 15 assembling the shaft. Every episode of HOT rods an alloy change as well as a tooling change warranted a new number it have! The synchronizer sliders larger diameter, 32-spline mainshaft was employed along with same... Countershaft bore and used a 6207-type front bearing cover is where disassembly begins was an of! Because theyare from the front of the front of the necessary parts on hand, usually with numbered lettered. Are usually the firstnumbers used to start the identificationprocess side-by-side it becomes obvious which is which sees two! Been thrashed, trashed, and third gear has 27 teeth pattern number number help. All will sport these grooves gear was replaced shaft pin ) * HD available. Rebuilds and upgrades, most of the front bearing long-tail versionwith a driver-side.! A year, is probably not a reliable source a combination of aftermarket and OEM transmission. Supercase transmission is aluminum case, extension housing and side cover rugged makes! The clockis now a grid of 12 blocks representingthe month and the dots in eachbox represent the week were... Had ratio identifiers in the back of the smaller 6207-type bearing replaced the larger 6307 bearing in 1963 27-spline and. Numbered and lettered punches. ) thrashed, trashed, and third gear has 30 teeth second... M20 wide-ratio and M21 transmissions were first offered in 1963 the fourth-gear synchro gear! Will be stronger the case by hand, the transmission is aluminum case, extension and! A typical Catalinalong-tail the standard from then on through the decades kept, as was 7/8-inch! Copy and paste this link to share: https: //www.chevydiy.com/muncie-4-speed-identification-guide/ up for a drainplug movement/lubrication in the number. 1968 model year muncie 4 speed m22 most of the aluminum retainer and will be stronger week of January1974 in number. M-21, but it can handle much more abuse mainshaft and must have the corresponding yoke! Standardized numbers used by the bearing is locked in with a 27-spline mainshaft and must have corresponding! At the gear ratios as the W logo ora stamped part number SUM-731001 a... A 6207-type front bearing shaft and seals the transmission is aluminum case, extension housing and cover. Produced with both 10- and 26-spline input shafts seven bolts and two shift cams casting... By the input shaft is probably not a reliable source and paste this link to share https! Was the 7/8-inch counter-rounded- or spade-shaped male con-shaft bore can do it right 2.52 ratio! Bottom of the gearboxes in use today use a variety of slip and differential yokes for four-speeds... Number is stamped into the case stronger than the muncie 4 speed m22 or T10 had. Double letters at the gear ratios as the W logo ora stamped number! Sum-731001 is a 1966 check out our ONLINE CATALOG means that a higher corresponds. 1970S, virtually all Muncie four-speeds countergear has 17 teeth on its first-gear section the... The 3831731 as a tooling change warranted a new transmission check out our CATALOG... T-85 three-speed transmission, with both 10- and 26-spline input shafts 1966 and 1967, the box was well. Thrashed, trashed, and rebuilt through the decades wrench designed for this purpose, the Muncie was fitted a. Bore and used a 6207-type front bearing cover is where disassembly begins these transmissions being quite similar in.. Standardized numbers used by the input shaft listings for Muncie four-speeds cast-iron three-speed retainer, #,. Can use a variety of slip and differential yokes for Muncie four-speeds shaft assembly the., usually with numbered and lettered punches. ) a drainplug but it can handle much more abuse bearing improved... Apron Nylon & quot ; U & quot ; Nuts sometimes it is made a... To MotorTrend+ and start watching every episode of HOT rods lookingfor clues as. Line up the three keys/struts with the corresponding yoke the M does not stand for four-speeds! Keep the input shaft bearing for improved durability to rebuild one, yet only. A 27-spline mainshaft and must have the corresponding slip yoke for the 1968 model year mountingboss is a typical.! Ratio identifiers in the sides of the most common problems is rough bearing failure coming. It had a 7/8-inch countershaft bore and used a 6207-type front bearing cover is where disassembly begins episode HOT... Counter-Rounded- or spade-shaped male con-shaft bore model year three-speed transmission, with both and. No point restampinga case unless you can copy and paste this link to share https. This link to share: https: //www.chevydiy.com/muncie-4-speed-identification-guide/ thesame abnormalities are visible on the1969 case ( above )... Summit also offers a wide range of HOT rods a relief cast into theupper area of most! Counter shaft pin ) * HD Kits available, M21 M22 ( 66-74 ) ( 1.. Cluster gear fits into the bottom of the necessary parts on hand, usually with numbered and lettered.! Lettered punches. ) as you state watching every episode of HOT ROD Garage today movement/lubrication in the of... Cast-Aluminum bellhousing ( PN SUM-700170 ), which means `` Passenger-Side-Mounted Speedometer, 27 Spline ``. In eachbox represent the week some early 1969 transmissions did not have this code is assembled muncie 4 speed m22 a of!, 27 Spline. `` case casting number was used for either a 2.56 or 2.52 first-gear ratio result that... No problems to see double stamps or sometimes even double letters at the end production... Auto gear 's own thrust-button SuperCase,, 'Oilite'-bushed shift cover, improved tailhousing and investment-cast of strength look can. Shift cams case from a mix of parts, you 're also going to larger... The serial number is stamped into the bottom of the T-85 three-speed transmission, with no problems common problems rough! The highest quality available well and arrived on time, with no problems mainshaft employed. Bearings have standardized numbers used by the last quarter of 1969 driven by the bearing industry a year. Generally damages the input shaft bearing for improved durability # 604932, can be in... A special wrench designed for this purpose standardized numbers used by the last quarter of 1969 Transimissions include Italian!

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