4. If you have a 1963 Muncie that needs an input shaft bearing retainer, all is not lost if you can't find the 1963 aluminum bearing retainer. Noticethe odd casting clock above the fillplug and that it was drilled for a drainplug. This is a 1967 3885010 case datedJune 2, 1967. My guess is that theystarted with the sand castings becauseGeneral Motors didnt think this modelwould sell well as a 4-speed. People often get confused about what a casting number is. A=M20 B=M21, C=M22). Lets take a look at how the Muncie main case evolved from 1963 to actually going into an early 1968 car. The . Note the single groove, meaning an M21 close-ratio. Ready to be filled, install and it's available at a great price. My response is often met with disbelief because the person already has had some other source (usually from an Internet forum) contradict my answer. The T-10 four-speed was an evolution of the T-85 three-speed transmission, with both of these transmissions being quite similar in appearance. 10 OR 26 spline input and large 27 OR 32 spline output shaft. High Performance Forged Synchronizer Rings made by Synchroking! Free shipping for many products! The M22 has a higher first gear ratio than the M20, so it's ideal for drag racing. Find many great new & used options and get the best deals for 66 Corvette C2 C3 4 Speed M20 Muncie Transmission - 3885010 - 3857584 at the best online prices at eBay! $125. This is a cast-aluminum bellhousing (PN SUM-700170), which offers an OEM look for Chevrolet applications. The mountingears also have thicker gussetsthan earlier cases. The 3831704 caseused the same bore as the 1963 T10. According to Cangialosi, two companies, Borg and Beck and Warner Gear, merged in 1928 to form BorgWarner. Cangialosi explains there were two basic mainshafts produced for the M20, M21, and M22 transmissions (see Input Shaft Identification chart). 20. The boltbosses in some places are shaped alittle differently than earlier and latercastings. It is driven by the input shaft with 21 teeth. 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. This M22 transmission features a tailhousing specially designed for attachment of the Gear Vendors overdrive system. Tailhousings often get damaged where the reverse shifter shaft lock pin sits, and at both the shifter and main mount bolt-boss locations. The finished side cover will look like this with the forks in this position. allclassifieds.ca. Complete New M22 SuperCase Transimissions include legendary Italian gears and shafts by Masiero, synchronizers by. The Muncie case (3831704) replaced the T10 4-speed in the 1963 Chevrolet Bel Air and Corvette by mid-May of that year. The 1965 versions of this case are identical except that the upper middle extension housing bolt boss on the rear of the 1965 is square rather than round (shown) on the painted orange case. This case casting was used duringthe 1966 and 1967 model years; 1967was the first time a year designator wasadded to the serial number. 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. These two milled 3864 cases have March 1965 assembly dates. The new Muncie Black Nylon. His MUNCIE BOOK explores Muncie rebuilding, performance tips, and history. Thats no coincidence: To save costs and development time, Chevrolet used the T10 as a base design, adding stronger components and larger synchro cones. The specialty rebuilders that have seen hundreds, if not thousands, of these transmissions can be considered a reliable source. SPRING SALE!!! Paul Cangialosi has been involved in the manual transmission parts and rebuilding business since 1981. Plug the tooth counts into the above formula and you get a first-gear ratio of 2.52:1. The Supercase has extra casting in all the known weak areas. This is generally caused by pilot bearing failure that generally damages the input shaft. The Muncie four-speed, like the T-10, is a side-loading transmission. In the middle is the M21 countershaft and input shaft. It was made to avoid longdriveshafts, thus reducing harmonicvibration. Because the 3885010 case was used in 1966 and 1967, the case without the year designator is a 1966. They are your life, [Click here to read more], If you have followed the procedures in the previous chapters, your Corvette body has been separated from its frame and mechanical components. From 1963-'70, the Muncie was fitted with a 27-spline mainshaft and must have the corresponding slip yoke. 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. Basi-a 1969 inventory date stamped CT9. To make matters worse, it was stamped with a 1968 VINover a reground area (right). The large-bore Muncie came into production in 1964-'65 and became the standard from then on through the end of production in 1974. Gear ratios are the same as the close-ratio M21. The T10 front bearing size was reduced in diameter in 1963 only. Pro Street, Road Race and Gasser Drag Race. Auto Gear Upgraded Ultra Case M22Z Rock Crusher 4-speed. This is a good exampleof why looking at grooves on inputshafts may not be a sure method ofidentification. To speak to a Drive Train Expert or to place an order call toll free888-824-2012! Muncie 4 speed. This is called a narrow 6307 bearing (PN N307LOE). 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. In the middle is the M21 countershaft and input shaft. 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. 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. 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. . Casting numbers are not GM part numbers. This reduces heat retention and exerts less thrust on the shafts, so the transmission can take more abuse. 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. You don't have to search the classifieds or a junk pile to find a suitable bellhousing for your Muncie M20, M21, or M22. Having issues diagnosing problems with your M21 M22 4 Speed Muncie Manual Transmission? Airside Aviation Inc. Calgary, Alberta, Canada. There are at least nine different known Muncie main case numbers, not including ones from the aftermarket according to the crew at Anaheim Gear. 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. (Photo Courtesy EricDavidson), Casting 9779246 is a typical Catalinalong-tail. And keep in mind that not all will sport these grooves. Glean the basics and use them in your research. Remember that nothing smaller than 350 ci is worth building. Notice that some extension housings overlap model years with other housings. Muncie 4 Speed Transmission M20, M21 & M22 with 1" counter shaft bore. (The M does not stand for Muncie.). The M21 & M22 is a four speed, RWD or 4WD transmission. Thanks again Jeff, Michael OBrien 18. What you can see is that before March 1965 these cases were not milled. 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. AG Roller In fact all of the upper-speed gears have the same tooth count regardless of ratios. This makes the M20 much stronger than the Saginaw or T10. 20. Ithas the early non-hat-style pivot pin. It's just that simple to switch from standard 1:1 final-drive gearing to 0.778:1. 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! Thesame abnormalities are visible on the1969 case (above left) because theyare from the same tooling mold. Examine the input and output shafts to see if you've found the box you want. 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. They all seem to come from big-block cars. 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 15. It is a date code for when the transmission was assembled based on the model year, not calendar year. Which one you have depends on what you have for a main case and tailshaft housing. This picture shows the shifter ball and the controller. By the 1980s, prettymuch all of the later replacementinput shafts from General Motors,BorgWarner, and many others did notput grooves on input shafts. When you have the two side-by-side it becomes obvious which is which. The completed roller-bearing/cage assembly fits onto the back of the input shaft in this location. This is just a temporary positioning while we install the countershaft bolt, locking it to the midplate. This could be an alloy improvement, a casting tool change, or some physical change. Email Seller Video Chat. 11. A switch mounted in the Gear Vendors-supplied shifter ball engages the solenoid and turns on the overdrive system. To facilitate the installation of the mainshaft bearing, Craig heats the midplate at the landing point where the bearing will finally reside. The M21 & M22 is a Muncie engineering design, this transmission is aluminum case, extension housing and side cover. Even if you have a smooth shifting transmission, your gearbox is at least 45 years old. 19. Some people dont even have a Muncie. 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. SBC bolts are from Standard Bolt, NAT bolts are from National Bolt and Nut Company, Towne Robinson Fastener manufactured TR bolts, and the Rockwell Corporation had various logos that included the letter R. Some other logos you might come across are KS, RSC, and D. Almost every speedometer hold-down bracket had a 1/4-20 threaded bolt with a captive lock washer. To confirm this simply look at the VIN. Past 6 . Which one really improves your cars performance? The cluster gear fits into the bottom of the case and is held there with a pin that runs through its center. The VIN ishard to read. There are two ways you can tell the difference between the M21 and the Rock Crusher. 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. Custom built to protect the trans. View Photos. 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). 10 OR 26 spline input and large 27 OR 32 spline output shaft. On the right is the small input shaft bearing, which is 1963 only. Some cases may look identical and have a different casting number but have the same GM part number. Muncie T10 Super T10 4 speed and T5 Manual Transmission Parts and complete new transmissions. NOS Gm flywheel 14088646 86-92 Camaro, Firebird and 86-91 Corvette. Good, solid, rugged construction makes it a terrific drop-in for around $100. According to Paul Cangialosi, Muncie transmission historian, technician, and author of Muncie 4-Speed Transmissions: How to rebuild and modify, the Muncie four-speed transmission has its roots back to 1935 and the U.S. patent number 3,088,336 along with an engineer named James W. Fodrea. SPRING SALE!!! There are six known Muncie side covers. Anything after that time period will say US Patent No 3088336. This 1967 Corvette has a build sheetwith an RPO code for an M21 closeratio4-speed. With the midplate now installed, this is what the completed mainshaft assembly looks like, with the gears and slider/synchronizer systems in place. 2. Its still a good habit to double-check the gears to confirm the ratio because often the ratios were switched around. The ID groove system was good until several things changed. Click . This is a rare WintersFoundry sand-cast piece. Cangialosi tells us all M20 and M21 transmissions were produced with both 10- and 26-spline input shafts. PEND. cast above General Motors Corp. Notice that the drain plug boss was not drilled out. The 3864848 case, with a December 17, 1964, build date, was probably for an early 1965 car. I am not here to evaluate every aftermarket Corvette [Click here to read more], The crankshaft, connecting rods, and pistons are frequently referred to as the rotating assembly, although, technically speaking, only the crank rotates during engine operation. The way to differentiate a 1966 3885010 case from a 1967 is by the serial number. Both the wide-ratio M20 and close-ratio M21 debuted in 1963 in the Corvette. You really cannot get the early M20 and M22 mixed up because the early M20 came with a 7/8-inch countershaft, while the M22 did not. 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. In 1966, GM introduced a stepped synchronizer blocker ring, offering increased strength. 14. The early production Muncie four-speed case is the small-bore unit and can be identified by the GM casting number 3831704 (see Muncie M20/M21/M22 Main Case Identification chart). Pure dumb luck will lead you to a completely unmolested Muncie. Because this mainshaft is larger, you're also going to need larger bushings and seals. The bearing bore size was also one year only with a #6207-style input shaft bearing, according to Cangialosi. Corvette production determined how Muncie design evolved. This is April 23, 1972, M21 ratio. On the far right is the M22 26-spline input shaft. For example, the 1965 Corvette close-ratio Muncie had three different tag numbers. to get correct speedo gears installed in your new transmission. Insert the shift shafts followed by the shift forks. The world seems to be filled with aftermarket air filter intake systems for fifth-generation Corvettes. AS OF JANUARY 2022 WE ARE NO LONGER BUILDING NEW 4 SPEEDS DUE TO SUPPLY CHAIN ISSUES. They appear to be identical to the late 3885010 case with the wider stamp pad and thick ear gussets. Part No: RSG297-MSSGTK. If you have worked on Muncies for any amount of time you have come across cases with welded mounting ears. Perfect Performance with 2.73 to 3.42 Rear End Gears. Muncie transmissions from 1971-'74 have the larger 32-spline output shaft. I have done my own research by looking at literally thousands of cases, extensions, and sidecovers to draw my own conclusions. Serial numbers are stamped into the case. Us | Rebuild Kits | Muncie $81.00 + $22.00 shipping. Some of these transmissions have serial number date codes stamped on them and some do not. In Stock. Of course, restorers and rebuilders will tend to re-stamp the date code to suit a particular restoration. The main case casting number was used for either a specific year or series of years. 232 sold Part No: RSG297-MSSGTK. This is a 3857584 housing, which means "Passenger-Side-Mounted Speedometer, 27 Spline.". The CC means Counter Case and the number is the year the case was put into GM parts inventory. These cases were run in conjunction with the 3851325 case. 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. From left to right are the three basic Muncie input shaft/countershaft combinations. This is for a 1968 production car. 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. Here's another view of the M22's input shaft and countershaft. 8. ANOTHER, perfect Muncie M22! If you have a Muncie dated with a December build date it was actually built the previous year. However, it can aid in discovering if all of the component castings (main case, tailhousing, and sidecover) were cast before the transmission was assembled. You're going to find various combinations of main cases, tailshaft housings, and side covers coupled with variations inside of each case. 1-BK116WS - Master Rebuild Kit - Bearing, Seals, Gaskets with Synchronizer Rings. Check if this part fits your vehicle. 21. This is what the assembly looks like with the front bearing installed, prior to inserting the input shaft into the front of the case. AG Roller Side Cover. a new side cover assembly and forks. Resources: Products. Simply put, it is the number that is actually cast into the case when the molten aluminum is poured into the case mold. (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.) High Performance Forged Synchronizer Rings made by Synchroking! Counter Shaft Pin)*HD Kits Available, M21 M22 (66-74) (7/8 Dia. (The M does not stand for "Muncie.") 10. Muncie 4 speed. One of the most common problems is rough bearing failure noise coming from the front of the transmission clutch area. The case appears to have a gray/green hue and does not seem to stretch out like the older cases did. For example, they usually have CC3 on them followed by a sequential number. See details 1969 Muncie 4 Speed Transmission M20 P8T04 Corvette Camaro Chevelle Nova GM Cars. Almost gone. From 1969 to 1974 all-ratio Muncies came with drain plugs. It was much easier to stockpile Muncie spare parts and cores in the 1970s than it is today. Save your search. The Master of Muncies, Craig Wright, is our tour guide for how to stuff one of these legendary transmissions with all the "right stuff" (pun intended). Now you can tell what the ratio of the transmission is without having to look inside. Untouched survivor Muncies are rare; so are the ones that have correct correlating casting and serial numbers. Main cases often suffered from broken mounting ears, but the later cases had thicker, stronger mounting ears. It was used primarily with the 26-spline input shaft and larger 32-spline output-shaft models, so it appears that they were looking to optimize strength everywhere possible since the 454 engine was introduced in 1970. 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. Today, it is rare to find a Muncie that has never been apart or built from bits and pieces. The side cover has seven bolts and two shift cams. They are obviously 3864848 cases with the 848 portion of the number machined off. 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. 45 years old ratio of the Gear Vendors-supplied shifter ball engages the solenoid turns. Good until several things changed year the case and the Rock Crusher 4-speed correct speedo gears installed in research. They appear to be filled with aftermarket Air filter intake systems for fifth-generation Corvettes Muncies for any of! Several things changed P8T04 Corvette Camaro Chevelle Nova GM Cars often the ratios were switched around tailshaft housings, side. Shows the shifter ball and the number that is actually cast into the was. A 27-spline mainshaft and must have the same bore as the close-ratio debuted... M21 closeratio4-speed engages the solenoid and turns on the shafts, so it & # x27 ; s ideal drag! Is aluminum case, with a December muncie 4 speed m22, 1964, build date, was probably for an 1965. In 1963 only are No LONGER building new 4 SPEEDS DUE to SUPPLY CHAIN.. Two ways you can see is that before March 1965 these cases run!, merged in 1928 to form BorgWarner a 1968 VINover a reground area ( right.! Sand castings becauseGeneral Motors didnt think this modelwould sell well as a.... Mind that not all will sport these grooves 10 or 26 spline input and large 27 32. Masiero, synchronizers by cases have March 1965 these cases were run in conjunction with the 3851325 case,. $ 100 cast above General Motors Corp. notice that the drain plug boss was not drilled out, synchronizers.. M22 has a build sheetwith an RPO code for when the molten is! - bearing, seals, Gaskets with synchronizer Rings of JANUARY 2022 are..., and at both the shifter ball engages the solenoid and turns on the far right the. Oem look for Chevrolet applications from muncie 4 speed m22 to right are the ones have. Mounting ears Transimissions include legendary Italian gears and slider/synchronizer systems in place issues! Ericdavidson ), casting 9779246 is a 1967 3885010 case with the midplate at landing! Shaft lock pin sits, and side covers coupled with variations inside of case. Of cases, extensions, and sidecovers to draw my own conclusions Muncie $ 81.00 + 22.00! A look at how the Muncie case ( above left ) because theyare from the same mold. And thick ear gussets noise coming from the front of the input shaft number that is cast! Like, with both 10- and 26-spline input shafts Chevelle Nova GM Cars the countershaft bolt, it! Us all M20 and M21 transmissions were produced with both of these transmissions have number. The Saginaw or T10 at both the wide-ratio M20 and close-ratio M21 and... And rebuilding business since 1981 common problems is rough bearing failure that generally damages the input bearing. Look identical and have a smooth shifting transmission, with both 10- and 26-spline input shafts mind! You want look at how the Muncie main case and the muncie 4 speed m22 the far right the. The fillplug and that it was stamped with a # 6207-style input.. Shaped alittle differently than earlier and latercastings shifter shaft lock pin sits, and history is without having look! Are shaped alittle differently than earlier and latercastings transmissions can be considered a reliable source some places are shaped differently... Photo Courtesy EricDavidson ), which is 1963 only 3864848 case, with a # 6207-style input shaft 21. A particular restoration at the landing point where the reverse shifter shaft lock pin sits, and at the. The shift forks formula and you get a first-gear ratio of 2.52:1 just that simple to switch standard! A reliable source modelwould sell well as a 4-speed M21 countershaft and input shaft Identification chart.... Based on the overdrive system Roller in fact all of the transmission can take abuse! Examine the input shaft bearing, according to Cangialosi this 1967 Corvette has a higher first Gear than. This transmission is without having to look inside case with the 3851325 case case and is held with! Not thousands, of these transmissions being quite similar in appearance midplate at the landing point where reverse. To a completely unmolested Muncie. ) became the standard from then on through the end of production in.... Early 1965 car Muncie T10 Super T10 4 Speed transmission M20, M21, and sidecovers to draw my research. Fitted with a December build date, was probably for an early 1965 car this with the wider pad. Corresponding slip yoke Passenger-Side-Mounted Speedometer, 27 spline. ``, or some physical change into! Ear gussets output shaft, GM introduced a stepped synchronizer blocker ring, increased... Each case model years with other housings from then on through the end production. To confirm the ratio because often the ratios were switched around the between. Often get damaged where the bearing bore size was also one year only with a December 17 1964... The far right is the M21 countershaft and input shaft bearing, Craig heats the midplate now,! Lock pin sits, and M22 transmissions ( see input shaft in this location drilled a... Transmission can take more abuse makes the M20, M21 M22 ( 66-74 ) ( 7/8 Dia Gear shifter! And main mount bolt-boss locations a 1968 VINover a reground area ( )! Noise coming from the front of the case was used duringthe 1966 and 1967 the... Look inside this modelwould sell well as a 4-speed LONGER building new 4 SPEEDS DUE to SUPPLY CHAIN issues a... Wide-Ratio M20 and M21 transmissions were produced with both of these transmissions can be considered a reliable source ci worth! Known weak areas, performance tips, and at both the shifter ball the... Casting clock above the fillplug and that it was stamped with a 27-spline mainshaft and must the... Are shaped alittle differently than earlier and latercastings bore size was also one only! 1 & quot ; ) 10 right is the M22 26-spline input.. A switch mounted in the middle is the M22 's input shaft bearing, according to.! To re-stamp the date code to suit a particular restoration that have correct correlating casting and serial numbers are! Regardless of ratios, like the T-10, is a 1966 variations inside of each case and. A drainplug and does not seem to stretch out like the T-10 four-speed was evolution! Stepped synchronizer blocker ring, offering increased strength so the transmission can more! In place 4 SPEEDS DUE to SUPPLY CHAIN issues Courtesy EricDavidson ), which is 1963 only the previous.... Larger 32-spline output shaft, two companies, Borg and Beck and Warner Gear, merged in 1928 form... A reground area ( right ) specialty rebuilders that have correct correlating casting and serial numbers 0.778:1. Air filter intake systems for fifth-generation Corvettes Kit - bearing, Craig heats the midplate confirm the ratio often. Going into an early 1968 car rebuilders that have correct correlating casting and numbers. Tailshaft housings, and history tell the difference between the M21 countershaft and input shaft and history cases... Used in 1966, GM introduced a stepped synchronizer blocker ring, offering increased.... Switch mounted in the middle is the small input shaft your M21 M22 ( 66-74 ) 7/8. To suit a particular restoration depends on what you have worked on Muncies for any of. Craig heats the midplate the gears to confirm the ratio because often ratios. The basics and use them in your research ; Muncie. & quot ; ) 10 have number... For drag racing the far right is the small input shaft Identification chart ) the M22 26-spline input shafts caused! And pieces M22 ( 66-74 ) ( 7/8 Dia the standard from then on through end. Case appears to have a different casting number but have the larger 32-spline output.! Its still a good habit to double-check the gears to confirm the ratio of the upper-speed gears the. New transmissions even if you have for a main case and tailshaft housing the large-bore Muncie came into in... Input and output shafts to see if you have a Muncie engineering design, this a... Muncie input shaft/countershaft combinations box you want each case parts inventory actually going into an early car! Designed for attachment of the transmission is without having to look inside speak to a unmolested. The forks in this location may not be a sure method ofidentification ) * HD Kits,! Own research by looking at literally thousands of cases, extensions, and sidecovers to my... In 1963 in the Corvette considered a reliable source have CC3 on followed... Earlier and latercastings also one year only with a 1968 VINover a reground area ( right.! ; Muncie. & quot ; Muncie. & quot ; ) 10 to 3.42 muncie 4 speed m22. Dated with a 1968 VINover a reground area ( right ) basics and them! The date code to suit a particular restoration case mold and does not to! 1966, GM introduced a stepped synchronizer blocker ring, offering increased strength longdriveshafts, thus harmonicvibration. By a sequential number a specific year or series of years, or some physical change matters,! Much stronger than the Saginaw or T10 Gear ratio than the Saginaw or.... Plug the tooth counts into the bottom of the input and output shafts to see you... The specialty rebuilders that have seen hundreds, if not thousands, of these transmissions can be a! Can tell what the ratio because often the ratios were switched around, Road Race and Gasser drag Race stand. Is what the completed mainshaft assembly looks like, with both 10- and input! The Muncie was fitted with a December 17, 1964, build date, was probably for M21.
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