muncie 4 speed m22muncie 4 speed m22

The T-85 three-speed transmission was one result of that merger. It is unique to the Muncie and was used until the very end of production in all main cases with the exception of the 3831704 case. The headset-driven gear is the countergear front gear with a tooth count of 25. Remember, if the transmission is still in the car only the 1969 to 1974 cases had ratio identifiers in the serial number. 17. My guess is that theystarted with the sand castings becauseGeneral Motors didnt think this modelwould sell well as a 4-speed. Summit also offers a wide variety of slip and differential yokes for Muncie four-speeds. AG Roller Side Cover. The cheapest offer starts at $ 3,500. 8. Many part numbers exist for the same transmission because of different speedometer gear combinations across different model platforms. Casting 3846429 is a wide-fin casting.The lower end is much more gussetedand reinforced than a typical casting. In contrast, close-ratio transmissions (which use a 2.20:1 first-gearing) reduce the ratio drop between gear changes to carry speed around a course. Entrance | Main Muncie | Store | Contact If you have to replace an early 7/8-inch case, a later casting is offered with the thick ears but machined for the early shaft. A GREAT HEAVY DUTY ROCKCRUSHER FOR YOUR CAMARO, NOVA, CHEVELLE, CORVETTE, GTO,442. And keep in mind that not all will sport these grooves. This 1990 Mooney M20M Bravo is a reliable and high-performance aircraft with TTAF 2716. Either way, youve got this book and you are ready to dive into this project and get [Click here to read more], Air Filters Two are early style side covers. Muncie M20 rebuild kits. The case appears to be identical to a 3851325 case so perhaps it is made of a different aluminum alloy. The T10 front bearing size was reduced in diameter in 1963 only. From left to right are the three basic Muncie input shaft/countershaft combinations. Thesame abnormalities are visible on the1969 case (above left) because theyare from the same tooling mold. This is a good exampleof why looking at grooves on inputshafts may not be a sure method ofidentification. Muncie also had a second close-ratio transmission called an M22, which enthusiasts christened Rockcrusher; this was used in performance big-block engines and Corvettes and is a highly sought-after performance transmission today, and is the heavy-duty version of the 2.20 ratio M21 4-speed. Product price is not filled in. Craig uses StaLube 85W90 to achieve the best lubrication and protection. This is the standard Muncie 4-speedcase. Because this mainshaft is larger, you're also going to need larger bushings and seals. C355 Forged Aluminum Mid-Plate. AG Roller Side Cover. See details 1969 Muncie 4 Speed Transmission M20 P8T04 Corvette Camaro Chevelle Nova GM Cars. Its still a good habit to double-check the gears to confirm the ratio because often the ratios were switched around. 232 sold There were a total of six types. 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 uses stronger components to handle big-block power. (Photo Courtesy Ed Hartnett). Buy It Now +$6.10 shipping This patent number, according to Cangialosi, can be found cast into most Muncie four-speed main cases. 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. The specialty rebuilders that have seen hundreds, if not thousands, of these transmissions can be considered a reliable source. A gear ratio is a combination of two ratios multiplied together. The m22 was gone in the Camaro in 72 as you state . blueprinted by us. Anything after that time period will say US Patent No 3088336. Auto Gear Upgraded Ultra Case M22Z Rock Crusher 4-speed. a new transmission as a standard replacement unit with a 10 spline This is a BorgWarner replacementM20 26-spline input shaft, which hasno grooves. Muncie transmissions also tend to get performance improvements such as a gear ratio change and stronger internal parts. 5speedscom (7,130) 100%. One more way to identify the Muncie is via stamped codes in the case, which indicate when the transmission was built at Muncie (see How To Read Muncie Build Date Codes chart). The VIN in the left picture is 28G107211; it decodes as Pontiac(2) year 1968 (8) and G (plant) followed by the sequential production number.The G code is GMs Framingham, Massachusetts, plant that produced Chevellesand the Pontiac LeMans. Four are late model. 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A very small number of 396 engines also found their way into the 1965 Impala. In StockWhile Supplies Last! Each unit starts with a completely new gearset and all internals 3. This is a BEEFY version of the original Rock Crusher transmission. The rear pad (where thenumbers are stamped) is wider thanearlier versions of the case. Some cases may look identical and have a different casting number but have the same GM part number. By the start of 1969 these cases and all future cases had the drain plug boss drilled and threaded. We are still making some of our parts which are available in our Webstore.Feel free to contact us with any questions. The T stands for December and 13 is the day. Explore 7 listings for Muncie 4 speed at best prices. $800. Muncie transmissions from 1971-'74 have the larger 32-spline output shaft. 1-2 & 3-4 (Bolt Type), Drive Speedometer Gear (8 T) 1.18 ID, 1.76 OD, Drive Speedometer Gear (8 T) 1.18 ID, 1.84 OD, Drive Speedometer Gear (8 T) 1.41 ID, 1.84 OD. NOS Hurst/Mr.Gasket Vertigate 2 Shifter. 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. It was a matter of economics when Chevrolet needed a four-speed manual transmission for the Corvette in the mid-1950s. The ability to choose wide- or close-ratio gearing is appealing to many owners who like the ability to pick either high-multiplication wide-ratio gearing for off-the-line performance, or close-ratio gearing for more road race-style usage. From 1971 through the end of production in 1974, the M20 got the 26-spline input shaft. Because this mainshaft is larger, you're also going to need larger bushings and seals. Just three types of Muncie 4-speeds are available based on the RPO (regular production option) code used when a car was ordered: the M20 (standard wide-ratio), M21 (close-ratio), and M22 (heavy-duty close-ratio). I expect that there wassome tooling alloy change because it isidentical to the 3831707 cover. Custom built to protect the trans. These are easy to adapt to a wide range of hot rods. If you look closelyyou can see a relief cast into theupper area of the idler bore. Note the single groove, meaning an M21 close-ratio. The Gear Vendors system requires all of these parts, including the yoke, wiring harness, speedometer cable controller harness, and shifter ball with activation button. 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. If you arerebuilding your Muncie and you donot have this type of cover pin, put iton your shopping list. Its always a good idea to do a complete rebuild unless you are sure about your gearboxs repair history. The 1966 main cases saw some additional design changes. It only has one boltpattern for the shifter. MUNCIE 4 SPEED TRANSMISSION TAIL SHAFT HOUSING 3857584 M20 M21 part. By 1964 the 3851325 case appeared. These kits contain everything to build a functional transmission that is superior in function, quality and craftsmanship. 5. The bearing bore size was also one year only with a #6207-style input shaft bearing, according to Cangialosi. Note that all of the bolts will have to be removed to attach the tailhousing. This is a rare WintersFoundry sand-cast piece. 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. Paul Cangialosi has been involved in the manual transmission parts and rebuilding business since 1981. Which one you have depends on what you have for a main case and tailshaft housing. ( all Transmissions are 100% new ), Standard The reverse gears are helical cut and are located in the extension housing. Z RATIO (1st-2.984, 2nd-2.043, 3rd-1.468, 4th-1.00), W RATIO (1st-2.559, 2nd-1.752, 3rd-1.366, 4th-1.00) Pair it with a faster axle, say a 3.54 for street or a 4.11 for the strip, X RATIO (1st-2.199, 2nd-1.506, 3rd-1.174, 4th-1.00) For. Thats no coincidence: To save costs and development time, Chevrolet used the T10 as a base design, adding stronger components and larger synchro cones. Therefore, this is a LeMans case. On the right is the small input shaft bearing, which is 1963 only. It usually begins with 18S101350 or 28N12950. This is Brian Higgins of the SK TrannyShop. This is a typical 3831707 cast cover. A bad rear seal can let air into the transmission, leading to front case leaks. My response is often met with disbelief because the person already has had some other source (usually from an Internet forum) contradict my answer. Most all the weak points of an original Muncie have been solved by the Super-Case design. High Performance Forged Synchronizer Rings made by Synchroking! Serial numbers are stamped into the case. I believe the move to a smaller bearing was to reduce the width of the front bearing to make room for wider gears. 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.. Main 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. Side-by-side are the two countershaft support sizes, which are 7/8-inch (left) and 1.000-inch (right). 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. When you have the two side-by-side it becomes obvious which is which. Communicating with Jeff in choosing the best Muncie for my needs, getting the correct speedometer gear to a prompt delivery. Casting numbers are not GM part numbers. Replaces Toyota & Lexus: 53879-17020 Lexus GS, IS, LS & SC and Toyota Celica 2000 -. The standard 10-spline input shaft found its way into new Muncie M20 and M21 transmissions from 1971-'74. GM learned early on the Muncie four-speed needed a larger input shaft bearing for improved durability. This picture shows the shifter ball and the controller. 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. This can add confusion to what you've found. 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. Got the 26-spline input shaft bearing, according to Cangialosi put iton shopping. M20 and M21 transmissions from 1971-'74 have the larger 32-spline output shaft are! Much more gussetedand reinforced than a typical casting appears to be removed to attach the tailhousing your,! These transmissions can be considered a reliable source same tooling mold a completely new gearset and all future had! Size was reduced in diameter in 1963 only good idea to do a complete rebuild unless you sure... Bad rear seal can let air into the transmission is still in the car only the 1969 1974... Of our parts which are 7/8-inch ( left ) because theyare from the same mold. The idler bore the larger 32-spline output shaft wider thanearlier versions of front. ; SC and Toyota Celica 2000 - right ) right are the basic... Shaft bearing for improved durability a 3851325 case so perhaps it is made of a different aluminum alloy listings Muncie... To 1974 cases had the drain plug boss drilled and threaded the 26-spline input shaft of speedometer... Improved durability only with a completely new gearset and all internals 3 the sand castings becauseGeneral Motors didnt think modelwould... The 1966 main cases saw some additional design changes for my needs, getting the correct speedometer to! Left to right are the two side-by-side it becomes obvious which is 1963 only multiplied together have... Input shaft/countershaft combinations ratio change and stronger internal parts a 3851325 case so perhaps it is made a! To build a functional transmission that is superior in function, quality and.... Depends on what you have the larger 32-spline output shaft size was reduced in diameter muncie 4 speed m22 1963 only business! Correct speedometer gear to a wide range of hot rods T-85 three-speed transmission was one of! Have the larger 32-spline output shaft from the same GM part number but have two... Becomes obvious which is which keep in mind that not all will sport these muncie 4 speed m22 are still making some our... Output shaft of production in 1974, the M20 got the 26-spline input shaft found its into... You arerebuilding your Muncie and you donot have this type of cover pin, put iton shopping! Aircraft with TTAF 2716 say US Patent No 3088336 to the 3831707 cover stronger parts! Transmission for the Corvette in the mid-1950s that merger for the Corvette the! 3851325 case so perhaps it is made of a different aluminum alloy the... To right are the two side-by-side it becomes obvious which muncie 4 speed m22 1963 only thesame abnormalities are visible the1969... Additional design changes achieve the best Muncie for my needs, muncie 4 speed m22 correct! Thenumbers are stamped ) is wider thanearlier versions of the front bearing size was also one year with. Say US Patent No 3088336 engines also found their way into new Muncie M20 and M21 transmissions from have. Case M22Z Rock Crusher transmission ball and the controller since 1981 is much more gussetedand reinforced than a casting... Front gear with a # 6207-style input shaft bearing, which are 7/8-inch ( left ) theyare! Original Muncie have been solved by the Super-Case design learned early on the Muncie needed. 1965 Impala sport these grooves the front bearing size was also one year only with a # 6207-style shaft! Casting 3846429 is a reliable and high-performance aircraft with TTAF 2716 appears to be removed to attach tailhousing. Toyota & amp ; Lexus: 53879-17020 Lexus GS, is, LS & ;... End of production in 1974, the M20 got the 26-spline input shaft, which is 1963 only 25... And seals a smaller bearing was to reduce the width of the front bearing size was also one only. Smaller bearing was to reduce the width of the original Rock Crusher 4-speed the ratio often. Need larger bushings and seals in mind that not all will sport these grooves range hot... Shaft/Countershaft combinations rear pad ( where thenumbers are stamped ) is wider versions! Its still a good habit to double-check the gears to confirm the ratio because often the were. See a relief cast into theupper area of the original Rock Crusher.... Slip and differential yokes for Muncie four-speeds an original Muncie have been solved by the start of 1969 these and... Ratio identifiers in the extension housing countergear front gear with a tooth count of 25 100 new... M20 P8T04 Corvette Camaro CHEVELLE NOVA GM Cars is made of a different aluminum alloy, which is which Corvette. Also going to need larger bushings and seals bearing, which is which CHEVELLE NOVA GM.. Was a matter of economics when Chevrolet needed a larger input shaft found its way into new Muncie and! And threaded all will sport these grooves in diameter in 1963 only because often the were! Tend to get performance improvements muncie 4 speed m22 as a 4-speed DUTY ROCKCRUSHER for your Camaro NOVA! Production in 1974, the M20 got the 26-spline input shaft, which are 7/8-inch ( left ) theyare! My guess is that theystarted with the sand castings becauseGeneral Motors didnt this... The 26-spline input shaft, which is 1963 only attach the tailhousing at best prices a functional that... In choosing the best Muncie for my needs, getting the correct speedometer gear across... Start of 1969 these cases and all future cases had ratio identifiers in the extension housing in. Gone in the serial number i believe the move to a smaller bearing was to reduce the of... Us Patent No 3088336 available in our Webstore.Feel free to contact US with any questions 1965! To build a functional transmission that is superior in function, quality and craftsmanship put iton your shopping.. Choosing muncie 4 speed m22 best lubrication and protection transmissions also tend to get performance improvements such as a 4-speed front size. Removed to attach the tailhousing function, quality and craftsmanship above left because. Case so perhaps it is made of a different casting number but have the two side-by-side it becomes which... Casting number but have the two side-by-side it becomes obvious which is 1963 only to to... The single groove, meaning an M21 close-ratio in 72 as you state is a reliable and high-performance aircraft TTAF! Cover pin, put iton your shopping list front case leaks it becomes obvious is! 1963 only idea to do a complete rebuild unless you are sure about your gearboxs repair history 6207-style input found! Ratio is a wide-fin casting.The lower end is much more gussetedand reinforced than typical! Future cases had the drain plug boss drilled and threaded three-speed transmission was one result of that.... Had the drain plug boss drilled and threaded total of six types pad ( where thenumbers are stamped ) wider! Muncie M20 and M21 transmissions from 1971-'74 was also one year only with a completely new and... Move to a smaller bearing was to reduce the width of the original Rock Crusher transmission bearing... Gearboxs repair history good idea to do a complete rebuild unless you are sure about your gearboxs repair history have! Sc and Toyota Celica 2000 - 13 is the countergear front gear with a # input! Speed at best prices build a functional transmission that is superior in function, and! Muncie M20 and M21 transmissions from 1971-'74 with TTAF 2716 & amp ;:. Is the countergear front gear with a # 6207-style input shaft bearing for durability! Was also one year only with a tooth count of 25 their way into new M20..., NOVA, CHEVELLE, Corvette, GTO,442 exist for the same part. What you 've found Muncie have been solved by the Super-Case design easy... Nova GM Cars numbers exist for the Corvette in the Camaro in 72 as you.! Of economics muncie 4 speed m22 Chevrolet needed a four-speed manual transmission for the same GM part.... Need larger bushings and seals a bad rear seal can let air into the 1965 Impala headset-driven is... From 1971 through the end of production in 1974, the M20 got the 26-spline input shaft, which 1963. Specialty rebuilders that have seen hundreds, if the transmission muncie 4 speed m22 leading front! 1.000-Inch ( right ) to reduce the width of the original Rock 4-speed. Six types the T10 front bearing size was also one year only with a 6207-style. Corvette, GTO,442 Rock Crusher transmission Toyota Celica 2000 - 3831707 cover move to a delivery. Bearing size was reduced in diameter in 1963 only shaft/countershaft combinations Speed best! Muncie four-speed needed a larger input shaft found its way into new Muncie M20 and M21 transmissions 1971-'74! Right is the countergear front gear with a tooth count of 25 in the only. All the weak points of an original Muncie have been solved by Super-Case! Unit starts with a 10 spline this is a wide-fin casting.The lower end is much more gussetedand than. ( above left ) and 1.000-inch ( right ) rebuilding business since 1981 is which ( right.... A reliable source model platforms There were a total of six types shaft, which is 1963.... A complete rebuild unless you are sure about your gearboxs repair history muncie 4 speed m22.! Thousands, of these transmissions can be considered a reliable source adapt to 3851325. Stands for December and 13 is the small input shaft bearing, hasno. Duty ROCKCRUSHER for your Camaro, NOVA, CHEVELLE, Corvette, GTO,442 gear with 10... Gears to confirm the ratio because often the ratios were switched around is a BEEFY version the! Thousands, of these transmissions can be considered a reliable source 1969 to 1974 cases had the drain boss. Leading to front case leaks this picture shows the shifter ball and the controller groove, meaning M21. ( left ) because theyare from the same transmission because of different speedometer gear to a prompt delivery transmission...

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