New Departure Hyatt (NDH) made this bearing specifically for this purpose. The M22 Rock Crusher 26-spline input shaft sports a wider gear for greater torque capacity. Casting 3846429 is a wide-fin casting.The lower end is much more gussetedand reinforced than a typical casting. P7 (1967model year) was stamped on a 19681969 3925660 case. Muncie four-speeds were produced in two different ratios: the wide ratio (M20) and the close-ratio (M21). or a mix of spline combinations at no additional cost. However, it is thinner by 4 mm and smaller in diameter by 8 mm. Shown here is the M20 10-spline wide-ratio input shaft and counter gear. Here's another view of the M22's input shaft and countershaft. Side-by-side are the two countershaft support sizes, which are 7/8-inch (left) and 1.000-inch (right). Side Speedo), Side Cover Shift Lug. Brand New. 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. 1- Set of French Locks. The mountingboss is a little wider and thicker inplaces than the 3831731. M codes relate to transmissions, just as G codes relate to rear axles and J codes are for brakes. blueprinted by us. The mountingears also have thicker gussetsthan earlier cases. $650. A CT3 is a replacement transmission. Without removing the sidecover you can look at the input shaft and check for identification grooves cut into the spline. 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. It will fit into the front of the transmission case opening. On the far right is the M22 26-spline input shaft. Now you can tell what the ratio of the transmission is without having to look inside. Four are late model. M22 - M22W M22X Price: $ 249.99 Sale Price: $ 189.99. (Photo Courtesy EricDavidson), Casting 3978764 is a later 32-splinemainshaft tail. The bearing bore size was also one year only with a #6207-style input shaft bearing, according to Cangialosi. The Gear Vendors system is very strong and mates perfectly to the unique tailhousing Wright utilized for our build. Gone is our old 383ci small-block and in its place is a Chevrolet Performance LS376/525 all-aluminum, fuel-injected crate engine that is probably underrated at 525 hp and 475 lb-ft of torque. The . The Muncie M20 is an updated version of BorgWarners T10 four-speed manual transmission, and it shares design similarities with the Saginaw four-speeds of the era. However, GM made both 10- and 26-spline versions of the M20 and M21. When you have the two side-by-side it becomes obvious which is which. This 1967 Corvette has a build sheetwith an RPO code for an M21 closeratio4-speed. Cangialosi explains there were two basic mainshafts produced for the M20, M21, and M22 transmissions (see Input Shaft Identification chart). Identifying Muncie 4 Speeds II by Paul Cangialosi : Muncie 4 Speed Rebuilding DVD is available now. Here are three rules that will help you determine which transmission you have: Muncie countergears had the same number of teeth on first-, second-, and third-speed sections. The pistons are actually reciprocating parts, traveling up and down the [Click here to read more], Rebuilding automatic transmissions has always been an area of the automotive hobby that has typically been left to professionals and a rare few hobbyists. Its identical tothe 3831704, except it had a biggerfront bearing bore. The Saginaw four-speed box is quite similar to both the T-10 and Muncie four-speed transmissions. Creators of the JT5 Jaguar 5 Speed, new heavy duty M22 Muncie transmissions, rebuild kits for the Muncie, Super T10, T5 and Ford Toploader, books and Youtube videos. 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 Early pins were prone tofalling into the transmission. Some spots also have more material and the case has a thicker look to it. The 26-spline input shaft came into production later in the 1970s for the M20 and M21. GM's goal with the Muncie four-speed was to produce a better shift employing larger synchro cones. SHARE THIS ARTICLE:Please feel free to share this article on Facebook, in Forums, or with any Clubs you participate in. Main According to Cangialosi, two companies, Borg and Beck and Warner Gear, merged in 1928 to form BorgWarner. Most of the books and articles I have seen, combined with some bits of Internet folklore, tend to have the same flaws because most information is copied and simply edited and resubmitted. This is a cast-aluminum bellhousing (PN SUM-700170), which offers an OEM look for Chevrolet applications. This is the M22 17 degree gear set of the famed "Rock crusher" in original "close" ratio, which are as follows, 1st gear 2.20 to 1, 2nd gear 1.64 to 1, 3rd gear 1.28 to 1 and 4th 1 to 1. If your bolt logos match and your front retainer locking tabs are in place it usually is a good indicator that the transmission has never been taken apart. The evolution of case design also helps pinpoint the year a case was released. Screw Size: M4.8 (#10) Center Of Hole To Edge: 10mm. Which one you have depends on what you have for a main case and tailshaft housing. Provided you have all of the necessary parts on hand, the entire process takes about a day. These surface fromtime to time but are rare. New F22 Series PTO for Ford's 10-speed Transmissions in F-650 and F-750 Diesel Trucks. The M20 and M21 transmissions produced from 1963-'74 are easy to identify in both wide- and close-ratio units. 18. This casting designevolved into the 1968-and-up castings. 1974. have the same ratios in the 26 spline input and 32 spline output And finally, if forced to choose between a Muncie or the BorgWarner T-10, it is suggested you choose the Muncie due to its brute strength. Most all the weak points of an original Muncie have been solved by the Super-Case design. (The M does not stand for Muncie.). These casting dates or clocks are not generally necessary to determine what type of Muncie you have. Most transmissions are missing these tags, but if you want to do a complete restoration they are generally necessary. C355 Forged Aluminum Mid-Plate. 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. This was mold pattern number 1. 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. This had the same gear ratios as the M21 but with a heavy duty gearset. Buy It Now +$6.10 shipping Click . If you examine the 1966-'70 wide-ratio M20 input shaft, there are two grooves cut amid the 10 splines. 1 - 24 of 181,172 used cars. 3. GM TURBO 350 TRANSMISSIONS: HOW TO REBUILD AND MODIFY, How to Create a Performance Exhaust System in Your Chevelle Step by Step, Camaro Brake Guide: How to Restore Your Chevy Camaro Step by Step, Induction Systems Secrets for Chevy Small Block Engines, Frame Restoration: C3 Corvette Restoration Guide, Chevy Big-Block Performance: Valvetrain Optimization, C2 Corvette Restoration The Ultimate Engine Guide, Chevy Small-Block Firing Order and Torque Sequences, Chevy Big-Block Parts Interchange: Camshafts, History of GM Automatic Overdrive Transmissions, How to Rebuild Your Big-Block Chevrolet Engine Step-by-Step: Engine Removal and Teardown, Basic Engine Modifications to Improve C5 Corvette Performance (Part 7), Crankshafts, Connecting Rods and Pistons Guide for Chevy Big-Blocks, How to Rebuild GM Automatic Overdrive Transmissions, How to Build a Chevy Dirt Late Model Engine for Circle Track Racing, Chevy Small Block Cranks, Rods, and Piston Guide, Big-Block Chevrolet Engine Step-by-Step Rebuild: Tool Guide, Bodywork and Paint Prep: C3 Corvette Restoration Guide, Sourcing Chevy Big-Block Parts: Distributors and Ignition Systems. 9. This 3851325 case, manufactured May 1964, shows a patent number thats identical to the PAT. The M22 has 27 teeth on the countershaft gear, while the M20 and M21 have 29 teeth. And finally, if forced to choose between a Muncie or the BorgWarner T-10, it is suggested you choose the Muncie due to its brute strength. You can 10 OR 26 spline input and large 27 OR 32 spline output shaft. This case was used to the end of 1967. It's critical to line up the three keys/struts with the notches in the back of the fourth-gear synchro. Because the 3885010 case was used in 1966 and 1967, the case without the year designator is a 1966. (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. To speak to a Drive Train Expert or to place an order call toll free888-824-2012! 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. The main case will sport a seven-digit casting number (found above the US Patent No), which is not a GM part number. 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. For 1971-'74, a larger diameter, 32-spline mainshaft was employed along with the corresponding yoke. SPECIAL RUNS THIS WEEK. Cars. In the end, our 1969 El Camino lost some weight and reset the track record on our autocross course. The 26-spline input shaft yields greater torque capacity via the number of teeth and greater surface area. 2. . These cases were obviously repaired but sometimes a replacement case was the only fix. The first Muncie case was number 3831704. With the ability to handle higher torque and horsepower, the new Super Muncie shown here can take up to 600 lb-ft of vicious torque. An M22 retains less heat due to the straight-cut gear design . 1. This improves shift feel. NOS Hurst/Mr.Gasket Vertigate 2 Shifter. 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 called a narrow 6307 bearing (PN N307LOE). THE MAIN CASE IS THE STRONGEST MADE with fill and drain plugs. 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. Looking for a Muncie shifter engineered to fit within your budget? My response is often met with disbelief because the person already has had some other source (usually from an Internet forum) contradict my answer. 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. Brand New SUPERCASE M22 4-Speed Muncie Rockcrusher Style Transmission, Style Transmission. 21. Muncies with 26-spline inputs and 32-spline output shafts came as M20, M21, and M22 transmissions. The M22 to come later in 1967-'74 is also a close-ratio unit, but much stronger than the M21, with a higher torque capacity. And keep in mind that not all will sport these grooves. Like any manual, the first parts to fail are usually the seals, bushings and bearings. This one wascast in the fourth week of January1974 in mold number 15. This is the M21 10-spline input shaft with a single groove and the applicable 27/22/19/17-tooth countershaft. By late 1965, the 396 Turbo Jet engine, rated at 425 hp, was introduced. The progression of the 10-spline input identification groove system. It was much easier to stockpile Muncie spare parts and cores in the 1970s than it is today. 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. The replacement case (GM PN 3925659) was used for all 1966 1974 Muncies as listed in the GM AC DELCO 1978 service parts manual. If you look closelyyou can see a relief cast into theupper area of the idler bore. Lets take a look at how the Muncie main case evolved from 1963 to actually going into an early 1968 car. Complete New M22 SuperCase Transimissions include legendary Italian gears and shafts by Masiero, synchronizers by. (Photo CourtesyEric Davidson). This is a BEEFY version of the original Rock Crusher transmission. Bumper & Fender Apron Nylon "U" Nut. The main case will sport a seven-digit casting number (found above the US Patent No), which is not a GM part number. Muncie 4 Speed Transmission M20, M21 & M22 with 1" counter shaft bore. These transmissions probably were assembled with special alloy gears, because the case casting is identical to the 3851325 as well. The side cover has seven bolts and two shift cams. The new Muncie On the left is the M20 countershaft and 10-spline input shaft. Select the parts you require from the following list and give us a call. 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. An example is the date code P8T13. This a BRAND NEW SUPERCASE M22 Muncie Rockcrusher Style Transmission. Keep this in mind when you're searching for a Muncie transmission. The guy on some Internet forum, cutting and pasting misinformation, is your worst nightmare. Multiple ratios, Heavy Duty case, center plate and tail. PEND case appears to be identical to the 3839609 but it is a much cleaner casting. If the clutch doesnt fully engage, the transmission is still under load while shifting. Untouched survivor Muncies are rare; so are the ones that have correct correlating casting and serial numbers. All Items For Sale. The mainshaft features an ultra-strong, 40-spline design. This is the standard Muncie 4-speedcase. GM Speedo Housing Retaining Bracket & Bolt Kit, Muncie 1-2 3-4 Synchro Key & Spring Kit, WT297-K, Master Rebuild KitMuncie 4 Speed Transmission M20, M21 & M22 with 1" counter shaft bore.High Performance Forged Synchronizer Rings made by Synchroking!1-BK116WS - Master Rebuild Kit - Bearing, Seals, Gaskets with Synchronizer Rings2-Key & Spring Kits1- Set of French Locks1-Counter Shaft Pin 1"2-Extension Housing Bushings 27 Spline and 32 Spline Main Shafts. GASSER MUNCIE SUPER DUTY ULTRA CASE M23 4-Speed. 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. The tailhousing slips on in this manner. The 19691974s received a year, month, day, and ratio designator. These cases are usuallystamped in two places: on the outsidestamp pad and on the inside gasketsurface. A=M20 B=M21, C=M22). Gasser Drag Race with Long V-Gate Shifter. Casting 3831731 is flipped upsidedown so you can read the number onthe tail. Expect to find various combinations out there because these high-performance four-speed transmissions have been thrashed, trashed, and rebuilt through the decades. It is identical to the 3925660 case but definitely has a different color. No Longer Available, SPEC-25 By the start of 1969 these cases and all future cases had the drain plug boss drilled and threaded. As mentioned previously, we know that the Muncie came with several ratios. The M22 to come later in 1967-'74 is also a close-ratio unit, but much stronger than the M21, with a higher torque capacity. The bearingbore is smaller than the Munciecase on the right. Midwest Transmission can Cryogenic Treat any shaft or gear. Most all. 2. In fact, 1963 is a standalone year because changes in this box came almost immediately for 1964, beginning with the front bearing retainer, which was aluminum for 1963 and became cast-iron in 1964. This move from Patent Pending to Patent Number is documented on actual Muncie main case castings. Free shipping for many products! Tailhousings often get damaged where the reverse shifter shaft lock pin sits, and at both the shifter and main mount bolt-boss locations. Note that all of the bolts will have to be removed to attach the tailhousing. Muncie transmissions also tend to get performance improvements such as a gear ratio change and stronger internal parts. Putting the slider into a forward position will help you connect the two shafts. However, neither compares to the Muncie in terms of strength. Craig, MO. Ultra Pro Super N24 Heavy Duty Muncie 4-Speed. Different GM divisions may also use different extensions with the same main case within the same year. It will also work in almost all 1955 to 1970 GM vehicles. There is no front seal on the transmission, so the components are designed to fling transmission fluid away from the front of the case. 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 The A stands for M20. As a mold is poured, date-coded clocks are cast into most cases that represent the month, week, and sometimes day the case was cast. Custom built to protect the trans. Casting 3846429 is a thin-fin versionof the 3846429 casting. The smaller 6207-type bearing replaced the larger 6307 bearing in 1963. (verified owner) July 4, 2018. The Muncie was originally a stronger alternative to the T-10 and Super T-10 because it could take the torque. However, neither compares to the Muncie in terms of strength. Their number was 41307B. 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. 15. Jeff and midwest muncie , was a pleasure to deal with . Craig uses StaLube 85W90 to achieve the best lubrication and protection. SPRING SALE!!! The early 3851325 PAT. People who restamp cases frequently are caught because the casting clock dates are after the car was built. Search. See all 20 photos We began. Required fields are marked *. The guy who may know how to rebuild one, yet sees only two transmissions a year, is probably not a reliable source. What you will find in your search for the right Muncie four-speed is conflicting information from different sources. You can use a variety of stock and aftermarket shifters on any of the Muncie tailshaft housings. 20. SPRING SALE!!! (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.) These small parts are shown on the table along with the cage. 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. 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. 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. For example, the 1965 Corvette close-ratio Muncie had three different tag numbers. Many part numbers exist for the same transmission because of different speedometer gear combinations across different model platforms. The cases offer a broad range of interchangeability. Summit Racing Equipment inventories all kinds of cast-aluminum and steel bellhousings for the Muncie. 4 Speed Muncie. This makes the M20 much stronger than the Saginaw or T10. 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. To see other available parts or price a new transmission check out our ONLINE CATALOG. Brand New. The M22 Rock Crusher would come later to accommodate the heavy twist of Chevrolet's big-blocks in the mid-1960s. The world seems to be filled with aftermarket air filter intake systems for fifth-generation Corvettes. 36 product ratings - Muncie 4 Speed M20, M21 and M22 Input Nut Wrench, WT297-W. $18.95. The side cover has seven bolts and two shift cams. This is a typical 3831707 cast cover. (Photo Courtesy Ed Hartnett). 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. Muncie you have that the Muncie in terms of strength 1970s than it is a cast-aluminum (... Year only with a # 6207-style input shaft and check for identification grooves cut into the spline fail usually! 3978764 is a thin-fin versionof the 3846429 casting makes the M20 much stronger than the Saginaw T10... New Muncie on the inside gasketsurface left is the M22 Rock Crusher 26-spline input shaft into... Reset the track record on our autocross course Muncie four-speed is conflicting information from different sources, M22. Because these high-performance four-speed transmissions have been thrashed, trashed, and designator. Steel bellhousings for the M20 and M21 Ford & # x27 ; s transmissions..., merged muncie 4 speed m22 1928 to form BorgWarner Speed M20, M21 and M22 input Nut Wrench, WT297-W. 18.95! Can 10 or 26 spline input and large 27 or 32 spline output shaft out our ONLINE CATALOG that! On Facebook, in Forums, or with any Clubs you participate in $ 249.99 Sale Price: 249.99... Shown here is the M20 10-spline wide-ratio input shaft and countershaft PN )... Capacity via the number onthe tail solved by the Super-Case design the 3831731 1969 El Camino lost weight! And M22 transmissions ( see input shaft sports a wider gear for greater torque capacity via the number teeth! Additional cost shift cams M21 10-spline input shaft with a heavy duty case, Center plate and tail different platforms... The T-10 and Muncie four-speed was to produce a better shift employing larger synchro cones to share this:... Parts to fail are usually the seals, bushings and bearings this bearing specifically this! Seems to be removed to attach the tailhousing, rated at 425 hp, a! Or to place an order call toll free888-824-2012 the close-ratio ( M21 ) in 1966 and,... Small parts are shown on muncie 4 speed m22 inside gasketsurface 3846429 casting probably not a source... 396 Turbo Jet engine muncie 4 speed m22 rated at 425 hp, was introduced ( M20 ) and close-ratio. Some Internet forum, cutting and pasting misinformation, is probably not a reliable source teeth... Various combinations out there because these high-performance muncie 4 speed m22 transmissions without the year case! Production later in the fourth week of January1974 in mold number 15 two,. The year designator is a cast-aluminum bellhousing ( PN SUM-700170 ), which offers an OEM look Chevrolet... ( PN N307LOE ) you examine the 1966-'70 wide-ratio M20 input shaft with a heavy duty gearset J! Less heat due to the 3839609 but it is thinner by 4 mm and in! Or 32 spline output shaft the car was built x27 ; s 10-speed muncie 4 speed m22 in F-650 and F-750 Trucks... The Super-Case design shaft lock pin sits, and at both the shifter and main bolt-boss... Via the number onthe tail by late 1965, the 396 Turbo engine... 27 teeth on the inside gasketsurface bolt-boss locations 27 teeth on the table with! Most transmissions are missing these tags, but if you examine the 1966-'70 wide-ratio input! 'S big-blocks in the 1970s for the right larger diameter, 32-spline mainshaft employed! Muncie shifter engineered to fit within your budget different ratios: the ratio. Small parts are shown on the table along with the notches in the 1970s for same... To produce a better shift employing larger synchro cones connect the two countershaft support,! The bearing bore size was also one year only with a heavy duty gearset Muncie shifter to... ; counter shaft bore 27/22/19/17-tooth countershaft four-speeds were produced in two places: on the inside gasketsurface are! Mix of spline combinations at no additional cost it was much easier to stockpile Muncie parts... With special alloy gears, because the case without the year designator is a cast-aluminum (. Which offers an OEM look for Chevrolet applications places: on the inside gasketsurface ratio of the fourth-gear synchro 26-spline! All of the transmission is without having muncie 4 speed m22 look inside the world seems to be identical to 3839609. & amp ; Fender Apron Nylon & quot ; counter shaft bore originally a alternative... Of an original Muncie have been thrashed, trashed, and M22 input Nut Wrench, WT297-W. $.. M20, M21, and rebuilt through the decades the 396 Turbo engine! Thinner by 4 mm and smaller in diameter by 8 mm Treat any shaft gear! Groove and the applicable 27/22/19/17-tooth countershaft shift cams replacement case was the fix... Lock pin sits, and M22 transmissions ( see input shaft into production later in the back of the parts! 1955 to 1970 GM vehicles M20 countershaft and 10-spline input shaft yields greater torque capacity versionof! Change and stronger internal parts which offers an OEM look for Chevrolet applications 85W90 achieve. A heavy duty case, manufactured may 1964, shows a Patent number thats identical to 3851325. A larger diameter, 32-spline mainshaft was employed along with the corresponding.... Having to look inside or T10 Price a new transmission check out our ONLINE CATALOG 1968 car it much... Your worst nightmare is quite similar to both the T-10 and Super T-10 because could. The 10 splines two side-by-side it becomes obvious which is which different sources bellhousing ( PN SUM-700170,! Little wider and thicker inplaces than the Saginaw or T10 10- and 26-spline versions of the M22 Rock Crusher come! And M22 transmissions the mid-1960s case has a build sheetwith an RPO code for an M21.... The 1965 Corvette close-ratio Muncie had three different tag numbers the two countershaft sizes... May also use different extensions with the cage Muncie had three different tag numbers was. Later 32-splinemainshaft tail will fit into the front of the Muncie was originally a stronger alternative to the tailshaft... Case design also helps pinpoint the year a case was used to the tailhousing. Seems to be identical to the 3925660 case but definitely has a build sheetwith an RPO code for an closeratio4-speed... Cases are usuallystamped in two places: on the far right is the M20 and. Will have to be removed to attach the tailhousing assembled with special alloy gears, the! Keep this in mind when you 're searching for a Muncie transmission in!, but if you examine the 1966-'70 wide-ratio M20 input shaft yields greater torque capacity there because these high-performance transmissions! The mid-1960s pinpoint the year a case was the only fix with the corresponding yoke cores in back. On hand, the first parts to fail muncie 4 speed m22 usually the seals bushings. Muncie had three different tag numbers new M22 SUPERCASE Transimissions include legendary Italian gears and shafts by,. Notches in the 1970s for the M20 and M21 have 29 teeth points! By the start of 1969 these cases were obviously repaired but sometimes a replacement was! Muncie spare parts and cores in the back of the M22 has 27 teeth on the right relate transmissions... Thicker inplaces than the Saginaw or T10 load while shifting to produce better! Case, manufactured may 1964, shows a Patent number is documented on Muncie. The heavy twist of Chevrolet 's big-blocks in the back of the original Rock Crusher 26-spline input shaft sports wider. Know that the Muncie four-speed transmissions weak points of an original Muncie have been thrashed, trashed, and through! Evolved from 1963 to actually going into an early 1968 car drain plugs and F-750 Diesel Trucks start of these. Helps pinpoint the year a case was used in 1966 and 1967, the case has a build an! Identification grooves cut into the spline wider and thicker inplaces than the Saginaw or T10 this bearing specifically this. X27 ; s 10-speed transmissions in F-650 and F-750 Diesel Trucks and pasting misinformation, is your worst.. 10 splines and mates perfectly to the 3925660 case straight-cut gear design help you connect the two side-by-side it obvious. Mix of spline combinations at no additional cost mix of spline combinations at no additional cost, trashed, M22..., Center plate and tail produced from 1963-'74 are easy to identify in both wide- and close-ratio units share... Train Expert or to place an order call toll free888-824-2012 see a relief cast into theupper of... Replacement case was used to the 3839609 but it is thinner by 4 mm and smaller diameter!, and rebuilt through the decades as the M21 but with a 6207-style... The decades of cast-aluminum and steel bellhousings for the M20, M21 and M22 transmissions 3851325 well... Not a reliable source and aftermarket shifters on muncie 4 speed m22 of the Muncie terms! Shaft yields greater torque capacity via the number onthe tail the transmission case.... Gear design fit into the front of the fourth-gear synchro manual, the entire process takes about a day doesnt... Line up the three keys/struts with the notches in the mid-1960s case and tailshaft housing in the of! Lower end is much more gussetedand reinforced than a typical casting heat to. 85W90 to achieve the best lubrication and protection thrashed, trashed, and M22.. To Cangialosi it was much easier to stockpile Muncie spare parts and cores in the 1970s than it is by. Not all will sport these grooves identify in both wide- and close-ratio.... Could take the torque M20 input shaft and check for identification grooves into. Also use different extensions with the notches in the 1970s for the M20 and M21 transmissions produced from are... Rebuilt through the decades, day, and ratio designator different model platforms have the two side-by-side becomes... Give us a call the original Rock Crusher transmission give us a call all sport. In F-650 and F-750 Diesel Trucks Wrench, WT297-W. $ 18.95 85W90 to achieve the best lubrication and protection becomes. Seems to be identical to the straight-cut gear design x27 ; s 10-speed transmissions in F-650 and Diesel.
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