This machined flat area has serial numbers Steel tag on the passenger side: The transmission identification number or source serial number (chassis VIN) is usually located close to the transmission code. According to Cangialosi, two companies, Borg and Beck and Warner Gear, merged in 1928 to form BorgWarner. The numbers stamped below the shifter cover are M3E07A. Looking for a Muncie shifter engineered to fit within your budget? Knowledge of your cars transmission system is helpful during repairs and car restoration projects. It is easy to determine whether you have an early or later model Muncie four-speed transmission by the way the transmissions linkage arms are attached. Transmissions have RPO numbers, usually beginning with "M". The M-22 was generally installed behind Another quick way to identify a Turbo 400 is to look at the kick-down mechanism. There are not too many gearboxes that can make that claim. It was phased out of use and superseded by GMs 700R4 starting in 1982. 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. - Casting numbers on the case, extention housing and side cover YOU DO. The Muncie was used in all high performance applications until the Borg-Warner Second Design Super T-10 began replacing it in 1974. Some early 1969 transmissions did not have this code. Generally used in straight and V6 and small block engines. Muncie transmissions also tend to get performance improvements such as a gear ratio change and stronger internal parts. On the far right is the M22 26-spline input shaft. Keep this in mind when you're searching for a Muncie transmission. Your right, if we knew what the trannys went to , they could be of help to someone if not only for parts. 3. document.write(theYear) The "kick down" switch locations for the Turbo 400. They are notoriously very hard to read and often people make the mistake of thinking a '3' is an '8'. Muncie 4-speed or TH400 were the only transmission options available. Expert advice on car parts, maintenance, and repair. THM375 - This transmission is a derivative of the THM400 sharing the external appearance of the 400. The two transmission systems manual and automatic, have different working principles. The length of the unit can also tell you a few things. Turbo 400 is the biggest, Turbo 350s and Powerglides smaller. 19. For 1971-'74, a larger diameter, 32-spline mainshaft was employed along with the corresponding yoke. 21. There are two significant variations of the Turbo 400. Generally able to handle up to 400 foot pounds of torque. 14. Please click Accept Cookies to continue to use the site. The pan contains several stamped numbers and codes informing readers about the transmission system. Starting with the 1966 models, the wide ratio versions got two rings around the input shaft, and the M22 input shaft had no rings and looks like a 1963 through 1965 wide-ratio input shaft. Theres a good number of vehicles that make use of both manual and automatic transmissions. (C: Chevrolet, D: 327, 68: 1968, 315953: sequential production number), Serial number stamped on the case, above the oil pan, driver side: Casting is located above side cover, on trans. tailgate or cargo doors. We want to make your transmission search as simple as possible. You can check the cars specifications online to determine if it uses a manual or automatic transmission. Borg Warner once again started supplying four speeds to GM in the early 70s with the release of the Super T10. - Assembly Date Code Stamping - can be stamped anywhere This code was used for ten years from 1976 to 1986. The cases offer a broad range of interchangeability. Muncies are the hot tip, since they usually were used with high performance engines. Youll need a pictorial representation of these groups to identify the 4-speed transmission correctly. You can identify transmission numbers by checking on the transmission pan. You can find the source serial number near the transmission code. Jointly developed by Chevy and Buick, it is also known as the CBC (Chevrolet-Buick combined) 350. Transmission block casting number R 7 T 28 GM number 3890564 Martinius. The Muncie four-speed transmission was heralded by many as anindestructible four speed used by General Motors, and found its way into many different car models, behind various engine combinations between 1963 and 1974. Monster Transmission & Performance does not claim ownership of any outside trademarked brands or images. The Powerglide on the left is a cast-iron unit from a 1958-62 Chevrolet. // ]]> Ning Network Name Goes Here. If you examine the 1966-'70 wide-ratio M20 input shaft, there are two grooves cut amid the 10 splines. The muncie reverse lever is in the extention housing, and the cover has 7 bolts. Before you here are the basics of Muncie M20, M21, and M22 four-speed transmissions. So now that we have given you some insight into identifying the Chevy four-speed transmission, the next time you are scouring the swap meets or local Craigslist ad, youll have a better understanding of what you are looking at, and youll get exactly what you want. Identifying the transmission on your project car ensures that you have the right parts and avoid any errors during the restoration process. Once you identify the pan, count the number of pan bolts for confirmation. There is also a fine-tooth 26-spline input shaft employed from 1971-'74. These grooves are there to indicate the ratios of the gears inside the transmission. Not a T10 (1304 series); If its iron and has all three shift levers on the side cover, its a Saginaw. Randy Bolig has been working on cars and has been involved in the hobby ever since he bought his first car when he was only 14 years old. The Powerglide was Chevrolets main automatic transmission through the mid-1970s. Finding the ID tag can be extremely difficult on the Turbo 35o particularly because, its probably been lost. You can also use VIN decoders to identify your transmission. H = Muncie / 3-speed K = McKinnon / 3-speed M = Muncie / 3-speed N = Muncie / 4-speed O = Saginaw / Overdrive P = Muncie / 4-speed M20 . by three Numbers and ending in another Letter (or two). There are a couple of different debates that typically occur when a bunch of car guys get together. That the Muncie has much in common with the T-10 is no accident. The casting number 3857584 tells us that this is a 1966 or 1970 Muncie tailshaft. 16. Muncie M62/M64 3-speed longitudinal transmission made by GM Muncie SM420 transmission 4-speed manual used up to 1967, very similar to sm 465 except small changes to gear ratios and location of reverse. That is why we offer multiple ways for you to search for your transmission. Other than the shape of the fluid pan, another key way to identify the Turbo 350 is by the vacuum modulator. He digs all flavors of automobiles, from classic cars to modern EVs. The constants in decoding the trans ID number are the date the transmission was produced. However, there are some methods you can apply to determine the transmission type your car uses. The 700R4 became the 4L60 and so on. Identifying a Powerglide is a matter of locating the source code on the transmission block and decoding it to find the units year of manufacture and of course, the 13 bolt holes on the pan. Unlike the Turbo 350, instead of a kick down cable, it uses an electrical slide switch, which is controlled by the throttle linkage. Slide under the car and locate the transmission. From 1963-'70, the Muncie was fitted with a 27-spline mainshaft and must have the corresponding slip yoke. There are no members with birthdays on this day. This number will contain a division identification number, the model year, and the assembly plant and production sequence (last six digits) of the vehicle identification number (VIN) stamped onto the transmission. Keep in mind, if you plan to drop one in a vehicle that makes more power than it did when it was stock, you might want to consider going with the Muncie if you plan to beat on it. They used -E to distinguish the electro Hydra-Matic transmission from other non-electronic ones. Set up the wheel chocks behind the tires so theyre firmly on the ground. New transmission designs came with new, unique pan shapes, and the general shape of the pan often paints a fairly clear picture of which automatic transmission you are dealing with. GM 8. But, those built between 1963 and 1965 will not have any rings around the input shaft. - Date Casting Codes The M-22 has "straight cut" gears. My question is will this direct swap to a '81 with the 3 speed saginaw? As long as you have the correct transmission shift levers, it should't be much to convert to the later trans, but I'd probably start with the Saginaw, given the choice. Aavailable in a 3 speed auto or 4 speed manual transmission. This stamping is usually alpha code indicating the source of the trans followed by several numbers indicating specific month & day the trans was assembled. Saginaw 3 speeds were built in both Saginaw, Michigan & Munchie, Indiana. On the left is the M20 countershaft and 10-spline input shaft. Search transmissions by vehicle's VIN, License Plate, or Year/Make/Model information. Our online catalog is chock full o' high performance gear that will have you grinnin' like a kid at Disney World. Basically, if you are installing one or the other in a car that will be a nice driver and see only minimal, spirited gear grabbing, both the Saginaw and the Borg-Warner can be a good and less expensive alternative to the more robust Muncie. 10. How to identify and decode chevrolet manual transmissions. On the right is the M22 countershaft with 27-teeth. In the middle is the M21 countershaft and input shaft. Two are early style side covers. Some transmissions have a code stamped onto them. - Chassis Vin Number stamping - beginning in 1962. fileslib. The Saginaw reverse shift lever is on the cover, and the cover has 7 bolts. 3.55 geared and higher (numerically lower) cars used the wide ratio gearbox. You have to decode these simple codes to read and understand the information. 3 speed manual out of a 55.1 Chevy Truck. It is widely known as one of the best automatic transmissions ever built. The cast-iron three-speed retainer, #604932, can be used in place of the aluminum retainer and will be stronger. 3L80 stands for three gears, longitudinal mount (rear-wheel drive), and the 80 signifies that it can handle 8,000 lbs. Muncie Transmission Identification. The 4L80E would be the "electronic" model. Manufacturer Part Number. 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. There is no real performance potential in the smaller 4.3 version, and it should be avoided or replaced with the larger LT1/LT45.7L engine if high performance is the goal. GM produced many transmission variants over the years, we included some of them here, but our main focus is identifying the fluid pans for Powerglide, Turbo 350, and Turbo 400. From 1967 on, the ID number contained the transmission type or plant prefix, Date (coded below), and a shift code. The Summit Performance 4-Speed shifter (PN SUM-700040) is a bolt-on swap designed to fit your Muncie. Today that seems reasonable however $184.02 1965 dollars adjusted to 2015 dollars is a whopping $1,384.93. GM Power Glide 2 Speed Transmission. Nowadays, most drivers are more familiar with automatic cars, and manufacturers mostly use automated transmission systems. You cant simply look at your classic car and identify the type of transmission it uses. X3845157 GM. You can find out if your GM model is automatic by using the same method. His passion for performance got him noticed by many locals, and he began helping them modify their vehicles. Note partial VIN stamped at the bottom. The Fora platform includes forum software by XenForo. The Turbo 400 has a very distinct fluid pan. The M20 and M21 transmissions produced from 1963-'74 are easy to identify in both wide- and close-ratio units. The Muncie four-speed was produced in two ratios: the wide ratio (M20) and the close-ratio (M21). 13. The gear ratio of the Chevy four-speed transmission placed in any car was usually determined by the engine size and rearend axle ratio. The source serial number is from the CAR the transmission originally went into, NOT the assembly plant. Chevy Hardcore NEWSLETTER - SIGN UP FREE! Discussion in '1947-1954' started by Blueflame236, Dec 15, 2012. . Prior to 1967, transmission ID numbers contained the plant prefix code, month and date of production (expressed numerically) and a shift code (D = Day, N = Night). The M22 Rock Crusher used a gearset that features less of an angled-tooth gearing (right). For example, a GM vehicle from before 1967 has an ID tag that looks like C123N. You might have trouble observing the system if the vehicle has an installed gearbox. Further Muncie identification +$20.00 shipping. The constants in decoding the trans ID number are the date the transmission was produced. (center) Borg Warner (right). This was used in A-body and F-body cars and Corvettes into the early 80s. Vehicles leaving the factory with an axle ratio of 3.55 and numerically lower gears, typically incorporated a wide-ratio transmission. severely powerful (high torque) big-block engines. Some of these methods are: All the above-listed methods are dependable ways of identifying a cars transmission. The Head Casting number is located outside of the Valve Cover in plain site on the Drivers Side. 1976-1987. General Motors used different transmission pan shapes and bolts for its models, so this method requires some knowledge of the pans. The easiest method of GM automatic transmission identification is to examine the transmission pan. Apart from numbers, General Motors transmission ID tag has codes. box FWIW. This page covers automatic trannies. my Saginaw #'s . When it comes to transmissions, no other company provides this level of commitment to their clients. Its no secret that the Saginaw and Borg Warner transmissions were not built to handle the kind of power that a Muncie transmission could withstand. 4JSAToo, Jan 6, 2004 #1. Comparison images courtesy of Hurst Shifters. Yes, there is a serial number on a transmission. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. The Turbo 375 was modified to accept the Turbo 350 driveshaft yoke. Youll not only need to hunt for, and hopefully find the tag, but it needs to be free of enough gunk to be legible. THM350 - Medium duty 3 speed trans used from 1969 to 1989, Used in Buick, Olds, Pontiac and Chevrolet cars and Chevy & GMC light trucks until 1987. 2. You don't have to search the classifieds or a junk pile to find a suitable bellhousing for your Muncie M20, M21, or M22. This is an M21 with 10-spline input shaft and cast-iron bearing retainer. In 1974, the two-speed box then went to the great scrap heap in the sky. If you have looked very carefully and find no numbers there, chances are your block is classified as a Replacement Block General Transmission Identification. On 72-77 vehicles, the switch is located over the accelerator pedal. The vacuum modulator is also a way of identifying GM transmission type after checking the pan and counting the bolts. The 1963-'65 M20 input shaft will not have grooves. The easiest way is by knowing the construction of each unit, and the differences are obvious. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. the angle of the gear teeth. Some transmissions will have a code stamped onto them while others have a tag riveted to the case.
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