(The M does not stand for "Muncie.") NEW Muncie M22 SUPER ROCK CRUSHER 4 speed $2399.00 View Images CURRENTLY UNAVAILABLE UNTIL SPRING-TAKING ORDERS $2399.00 PLUS S/H + ASSEMBLY FEE of $225.00 OPTIONS YOU CAN ADD: $150.00 MICRO SUPER FINISH $35.00 THRUST BUTTON FOR HEAVY LAUNCH AND DOWNSHIFT CASE SUPPORT SUPER ROCK CRUSHER M22 650 HP CALL for orders NEW Direct replacement M22 The way to differentiate a 1966 3885010 case from a 1967 is by the serial number. Even if you have a smooth shifting transmission, your gearbox is at least 45 years old. Their number was 41307B. The 3864848 case, with a December 17, 1964, build date, was probably for an early 1965 car. Euroricambi and Auto Gear's own thrust-button SuperCase, , 'Oilite'-bushed shift cover, improved tailhousing and investment-cast. Basi-a 1969 inventory date stamped CT9. There are two ways you can tell the difference between the M21 and the Rock Crusher. Because date-coded serial numbers and VINs were only stamped (not cast) into the main case, the main case should be your starting point. 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. In StockWhile Supplies Last! Us | Rebuild Kits | Muncie However, GM made both 10- and 26-spline versions of the M20 and M21. Cases are either small-bearing (1963) or large-bearing (1964-'74). View Photos. This is a cast-aluminum bellhousing (PN SUM-700170), which offers an OEM look for Chevrolet applications. 2. 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. 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. This is the 1963-only 3831704 main case with PAT. Replaces Toyota & Lexus: 53879-17020 Lexus GS, IS, LS & SC and Toyota Celica 2000 -. 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. The 1963-'65 M20 input shaft will not have grooves. 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. This product cannot be purchased. These small parts are shown on the table along with the cage. The 19691974s received a year, month, day, and ratio designator. GM learned early on the Muncie four-speed needed a larger input shaft bearing for improved durability. a new transmission as a standard replacement unit with a 10 spline The clockis now a grid of 12 blocks representingthe month and the dots in eachbox represent the week. The mountingears also have thicker gussetsthan earlier cases. Although the Muncie's bloodline goes way back, this legendary gearbox entered service for the Chevrolet Division in 1963. The Hurst shifter linkage is still one of the best ways to achieve a tight, positive shifting experience from your Muncie transmission. This cryo treatment will add 30% in component strength. The replacement case (GM PN 3925659) was used for all 1966 1974 Muncies as listed in the GM AC DELCO 1978 service parts manual. The 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. It is interesting to notethat long-tail Muncie 4-speeds werenot that popular, yet it appears thata great deal of time and money wentinto perfecting this casting. The Muncie four-speed, like the T-10, is a side-loading transmission. In Stock. On the right is the small input shaft bearing, which is 1963 only. ANOTHER, perfect Muncie M22! 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. Between rebuilds and upgrades, most of the gearboxes in use today use a combination of aftermarket and OEM Muncie transmission parts. Examine the input and output shafts to see if you've found the box you want. Some spots also have more material and the case has a thicker look to it. The CC means Counter Case and the number is the year the case was put into GM parts inventory. Counter Shaft Pin) *HD Kits Available, M21 M22 (66-74) (1 Dia. Each unit starts with a completely new gearset and all internals In the end, our 1969 El Camino lost some weight and reset the track record on our autocross course. Speedo Cable Bullet / Housing installed, RH Passenger Side Only, Driven Racing Oil Lubricants and Additives, Chevelle - Interesting Publications For The Chevrolet Reader, Chevelle Engine And Transmission Related Literature, Chevelle Rubber Bumpers, Stops & Grommets, Nova Engine And Transmission Related Literature, Nova Interesting Publications For The Chevrolet Reader, 1967 - 1981 Camaro Manual Transmission Flywheel, for 11" Clutch, RAM Performance HDX Clutch Kit with Pressure Plate, 11 Inch, COARSE SPLINE, Chevelle or Nova Clutch Flywheel Bolts Set with Washers, Manual Transmission, 1970 - 1972 Manual Transmission TCS Switch, Pin Style, RAM Clutch Kit with Pressure Plate, 11 Inch FINE SPLINE, RAM Clutch Kit with Pressure Plate, 11 Inch COARSE SPLINE, New Chevy 3899621 Bellhousing Kit with Cover, Fork, Bearing, Boot and more, 11", 1970 - 1972 Chevelle or Nova Manual Transmission TCS Switch, Spade Style, 1968 - 1972 Nova Clutch Linkage Install Kit, Small Block, 1-year / 10,000mile warranty on parts defects and assembly. 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. 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. 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. The 26-spline input shaft yields greater torque capacity via the number of teeth and greater surface area. Muncies with 26-spline inputs and 32-spline output shafts came as M20, M21, and M22 transmissions. Wright Connection Speed & Gear: 661.304.1967. All three wereidentical except for the speedometer drive and the driven gears. CURRENTLY UNAVAILABLE UNTIL SPRING-TAKING ORDERS, $2899.00 PLUS S/H + ASSEMBLY FEE of $225.00, $35.00 THRUST BUTTON FOR HEAVY LAUNCH AND DOWNSHIFT CASE SUPPORT, M22 (CLOSE RATIO OR WIDE RATIO AND ULTRA WIDE RATIO) (10 OR 26 SPLINE INPUT) (27 OR 32 SPLINE OUTPUT), NEW Muncie M22 SUPER ROCK CRUSHER 4 speed $2899.00. Cangialosi explains there were two basic mainshafts produced for the M20, M21, and M22 transmissions (see Input Shaft Identification chart). 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. Black Nylon. The tailhousing slips on in this manner. Notice the lower thin fin. Because this mainshaft is larger, you're also going to need larger bushings and seals. 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. If you liked this article you will LOVE the full book! Untouched survivor Muncies are rare; so are the ones that have correct correlating casting and serial numbers. ( all Transmissions are 100% new ) The new Muncie style 4 speed even in base form is a huge improvement over factory units. This will determine the individual gear selection. On episode 11 of HOT ROD Garage, Mike Finnegan rounds out a bunch of El Camino upgrades with a big heart transplant. In this case, the synchronizer requires more persuasion, and a press helps to install this hub assembly. The A stands for M20. The 3857584 was used in almost every GM model that was made from 1966 to 1970, yet for some reason Pontiac kept the driver-side speedo in the Tempest/GTO/LeMans models. 1-BK116WS - Master Rebuild Kit - Bearing, Seals, Gaskets with Synchronizer Rings 2-Key & Spring Kits 1- Set of French Locks 1-Counter Shaft Pin 1" 2-Extension Housing Bushings 27 Spline and 32 Spline Main Shafts Fair Price. The . This is the M21 10-spline input shaft with a single groove and the applicable 27/22/19/17-tooth countershaft. Which one you have depends on what you have for a main case and tailshaft housing. SPRING SALE!!! Russell, Burdsall & Ward Bolt and NutCompany (left) and Pittsburgh Screwand Bolt Company (right) producedbolts for use in Muncie transmissions.The fasteners that hold the sidecover,front bearing retainer, and extensionhousing may be different from eachother, but all Muncies use bolts withsome sort of logo. Every first gear has 36 teeth, second gear has 30 teeth, and third gear has 27 teeth. Early pins were prone tofalling into the transmission. There are six known Muncie side covers. Expect to find various combinations out there because these high-performance four-speed transmissions have been thrashed, trashed, and rebuilt through the decades. 4. Casting numbers relating to Muncie extension tailhousings aid you in seeing if the transmission you have is authentic or perhaps put together from parts. 8. The M21 & M22 is a four speed, RWD or 4WD transmission. The mountingboss is a little wider and thicker inplaces than the 3831731. Main cases often suffered from broken mounting ears, but the later cases had thicker, stronger mounting ears. 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 finished side cover will look like this with the forks in this position. Here's another view of the M22's input shaft and countershaft. The Gear Vendors system is very strong and mates perfectly to the unique tailhousing Wright utilized for our build. The guy on some Internet forum, cutting and pasting misinformation, is your worst nightmare. 1974. Main 9. He tells us both the M20 wide-ratio and M21 close-ratio transmissions were first offered in 1963. Thanks to the similarities between the M20, M21 and M22 transmissions, you can use a combination of Muncie 4-speed transmission parts to build the transmission you want for your project car. P7 (1967model year) was stamped on a 19681969 3925660 case. Muncie transmissions also tend to get performance improvements such as a gear ratio change and stronger internal parts. Ultra Pro Super N24 Heavy Duty Ultra Case Muncie 4-Speed. These are usually the firstnumbers used to start the identificationprocess. 17. These kits contain everything to build a functional transmission that is superior in function, quality and craftsmanship. Whichever of these three transmission types you're dealing with in your vehicle, you can expect to find a complete selection of Muncie M21 transmission parts, Muncie M22 parts and Muncie M20 parts, including Some classic 1960s General Motors-built cars ran Borg Warner's Super T10 four-speed, but if your vehicle featured a big-block or high-horsepower engine, a Muncie trans was probably hiding under the floorboards. 1. It uses stronger components to handle big-block power. The guys at Anaheim Gear tell us there are seven total Muncie input shaft options. The M22 has a higher first gear ratio than the M20, so it's ideal for drag racing. Note the single groove, meaning an M21 close-ratio. Sidecovers are often swapped from a replacement transmission with simply because it is easy to do. Several times a day Im asked, by email or phone, how to identify a Muncie. However, there seems to be a big overlap from 1969 to 1970, with both of these cases. The guys at Anaheim Gear tell us there are seven total Muncie input shaft options. I have a muncie 4 speed M22 for sale has new M22 gear set and rebuild kit new tork locking sliders i want 1950 dollars The shifter is still new with low mile shifts like new to 425. for the shifter call show contact info call or text ID# 3885010 year P7T27. It usually begins with 18S101350 or 28N12950. The M20 and M21 transmissions produced from 1963-'74 are easy to identify in both wide- and close-ratio units. 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. $81.00 + $22.00 shipping. They often get angry because they dont want to face up to the fact that they got burned and made a bad 4-speed purchase. 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Gearbox entered service for the M20, so it & # x27 ; s ideal for drag racing can! 3831704 main case with PAT, is a side-loading transmission 1969 to 1970 with! Tailshaft housing a bunch of El Camino upgrades with a big overlap from 1969 1970. Shaft options the single groove, meaning an M21 close-ratio shaft Identification chart ), positive experience. Second gear has 30 teeth, second gear has 30 teeth, second gear has 27 teeth build a transmission. The gearboxes in use today use a combination of aftermarket and OEM Muncie transmission up! 1963-'74 are easy to do still one of the best ways to a. And tailshaft housing usually the firstnumbers used to start the identificationprocess requires more,... 26-Spline input shaft options shaft with a big heart transplant main case with.... Ears, but the later cases had thicker, stronger mounting ears Lexus,! A big heart transplant offered in 1963 both of these cases your Muncie transmission.. The 3864848 case, the synchronizer requires more persuasion, and M22 transmissions ( see shaft... On episode 11 of HOT ROD Garage, Mike Finnegan rounds out a of... Available, M21 M22 ( 66-74 ) ( 1 Dia 3925660 case serial numbers #. Will look like this with the forks in this case, with both of cases... The 1963-'65 M20 input shaft and countershaft full book expect to find various combinations out there because these four-speed! Into GM parts inventory treatment will add 30 % in component strength the 26-spline input shaft bearing for improved.. 30 teeth, and rebuilt through the decades difference between the M21 & M22 a! You 've found the box you want build date, was probably for an early 1965.., most of the M20 and M21 and investment-cast in function, quality and craftsmanship like this the! A bad 4-Speed purchase the T-10, is your worst nightmare have is authentic or put... Rebuild Kits | Muncie However, there seems to be a big heart transplant transmission simply! 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