He digs all flavors of automobiles, from classic cars to modern EVs. While the M21 and M22 did have the same gear ratios, the M22 did utilize a cluster gear with the gear teeth having different tooth angles. The transmission identification number or source serial number (chassis VIN) is usually located close to the transmission code. 5. The one on the right is an aluminum-case Powerglide. The M-20 wide ratio, the M-21 close ratio, and the "Extra heavy From complete engines, to torque converters to Monster in a Box, we've got all your HP needs covered. From the outside, you should be able to make out the number on the metal dash plaque by looking through the glass. The T-85 three-speed transmission was one result of that merger. Knowing if your transmission is manual or automatic should be basic information. When you have the two side-by-side it becomes obvious which is which. Vehicles leaving the factory with an axle ratio of 3.55 and numerically lower gears, typically incorporated a wide-ratio transmission. These days, the tag looks like P8E17 (Powerglide= type, 8= 1988, E= month, 17th= day). The SM465 was made by General Motors from 1968 to 1991. The bearing bore size was also one year only with a #6207-style input shaft bearing, according to Cangialosi. 6. THM400 - The THM400 was GM's Heavy-duty 3-speed transmission used from 1964 to 1990. Turbo 400 transmissions were partial VIN stamped either above the pan rail on the drivers side (very difficult to see with the exhaust system installed) or on the drivers side of the bell housing as indicated in the picture. Varying axle ratios were featured on the various gearbox and engine types per the below table. 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. It's a light duty version of the THM400, has ABSOLUTELY NO RELATION to the THM375B, and was found in 1972 to 1976 full-size cars. The 1964 through 1968 Muncie side covers had a stud coming out of the side cover that secured the linkage arm via a nut. According to Cangialosi, GM took the basic T-10 design and beefed it up to conceive the Muncie M20 and M21 four-speed transmissions, which arrived in 1963. GM Turbo 350 and 350C (TH350 Transmission) 3 Speed Transmission. The Turbo 350 transmission was prevalent in nearly all GM, rear-wheel-drive cars and trucks through 1984. Automatic transmission types are generally identified by their pan shape. If a car came with an axle ratio of 3.73 (or numerically higher), it usually came with a close-ratio transmission. The 1956 through 1962 Corvettes only used the aluminum versions. The casting number 3925660 denotes this as a 1968 1970 Muncie with a 1-inch cluster shaft. 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. 2001 - 2022 Monster Transmission and Performance, All Rights Reserved. The 4 cylinder models have 4 large cooling holes near the torque converter, while on the "bigger cars" there are no cooling holes. For example, the first X will be a Letter from A through L. We'll send you the most interesting Chevy Hardcore articles, news, car features, and videos every week. How to identify and decode chevrolet manual transmissions. The Turbo 400 was GMs heavy-duty three-speed transmission used from 1964 to 1990. This version did not have a locking converter. According to Koval, the easiest way to identify an automatic transmission, though, is by transmission pan shape. Off of the left side of trans: GM 3845122 H254 Thanks. Whether youre trying to repair your transmission or rebuilding a project car, its crucial to identify the transmission type. track of what was what, it's best to ID your gearbox visually, taking what is stamped on the Example: 19N500001. If the case and side cover are made of cast iron, that would make it a Saginaw transmission. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. 1981-1990. 4L80 - An overdrive model of the THM400. The vehicle identification number (VIN) is a unique identifier for each vehicle (VIN). In 1974, the two-speed box then went to the great scrap heap in the sky. From 1950-1973, most GM divisions used the iconic Powerglide transmission. If you have looked very carefully and find no numbers there, chances are your block is classified as a Replacement Block fileslib. While its obvious that the four speed will use three shift-linkage arms and the three speed will have two, if the first letter is R, then you have found a four speed. 60 is the strength rating (less than the 4L80). 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. After this guide, you should be able to understand and identify the transmission on both old and new GM models. 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. Afterward, you can count the bolts securing the pan. The Muncie has probably been the most popular transmission among the hot rodding set since its inception in 1963. Download Gm manual transmission identification numbers, Read Online Gm manual transmission identification numbers, http://virtual-village.ning.com/photo/albums/pairing-apple-watch-i-icon-user-manual-guide, https://elimuspace.com/?post_type=dwqa-question&p=31547, https://smkn4malang.sch.id/?post_type=dwqa-question&p=28056, http://teslacommunity.com/photo/albums/nice-pancreatitis-guidelines#.Y3QvpNtByNQ, http://teslacommunity.com/photo/albums/kidde-carbon-monoxide-detector-installation-instructions#.Y3QvTdtByNQ, http://teslacommunity.com/photo/albums/barista-handbook-pdf#.Y3Qv8NtByNQ, http://teslacommunity.com/photo/albums/secadora-mabe-9-kilos-manual#.Y3QvQNtByNQ. You can use things like the pan material, length, and shape to identify it. If it starts with an S, you are looking at a three-speed Saginaw. as I can make it) transmission plant prefix list: Chevy Automatic Transmission Identification. - Chassis Vin Number stamping - beginning in 1962. Add to quote; Share Only show this user. Further Muncie identification The Muncie utilized seven different input shafts. Due to this, the box tends to But the other numbers don't match the extension or sidecover casting numbers. NOT every company stands behind their work. The Turbo 475 was an extra-heavy-duty version and was found in larger trucks from 1971 on. 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. Become a VCCA member! Transmission Stuff * Manual 3-speed transmissions * Muncie 4-speed Casting Numbers/Decoding/Identification * Powerglide * Turbo Hydramatic 350 * Turbo Hydramatic 400 * 200-4R/700R4 Overdrive * GM Transmission lengths & oil pan * Automatic transmission operating temps * TH350/TH400 Speedometer Gears Frames * Chevelle Frames Trim Tags On 72-77 vehicles, the switch is located over the accelerator pedal. The Borg Warner has a 9 bolt cover. Not a T10 (1304 series); If its iron and has all three shift levers on the side cover, its a Saginaw. On the right is the small input shaft bearing, which is 1963 only. Check through the information for your transmission identification. very hard to read and often people make the mistake of thinking a '3' is an '8'. In 1962, aluminum units were only used with the 327 engine, but by 1963, all Powerglides had aluminum cases. CASE: GM 20 3799193 D1162 TAIL: 3707195 COVER: (4 bolt) 3731911 . The output shaft has the code # of 14030874. VIN decoders are helpful, and they come in handy when you need to know more about your vehicle. 5. If you do happen to stumble across Chevy four-speed at a swap meet, do you know what you are actually looking at? Need a little help in the ID of a GM 3 speed trans I picked up. They created a standardized naming system across the product line and changed the name of the Turbo 400 to 3L80. Expect to find various combinations out there because these high-performance four-speed transmissions have been thrashed, trashed, and rebuilt through the decades. This frees up the geartrain. If you are installing your transmission that was purchased from Monster Transmission, our sales and support staff is here. On the THM200-R4 the VIN is stamped onto the housing towards the rear of the pan, on the drivers side. This number will contain division ID #, model year, assembly plant and production sequence (last 6 digits) of the VIN stamped onto the transmission. You have to decode these simple codes to read and understand the information. 1976-1987. my Saginaw #'s . THM700-R4 - 4 Speed transmission used in GM cars and light trucks with the 2.8, 3.1, 4.3, V6, Chevrolet built 305, 350 and 454 engines from 1982 to 1992. During the run of General Motors inclusion of four speeds in their cars, there were three variations possible. If you dont know where to check, the transmission usually stays around the area of the rear tires. Generally used in straight and V6 and small block engines. Borg Warner once again started supplying four speeds to GM in the early 70s with the release of the Super T10. May 31, 2006. The length of the unit can also tell you a few things. So it's definitely something you want. Drivers dont usually have a problem with identifying modern manual 5-speed and 6-speed transmission systems. When repairing or restoring your Chevrolet car or truck, identifying the transmission youre running is a key element to avoid the automotive version of quicksand. Because this mainshaft is larger, you're also going to need larger bushings and seals. Download Gm manual transmission identification numbers Read Online Gm manual transmission identification numbers. Transmissions with a suffix of "C" on the end of the type (THM200C) indicate the transmission has a lock up torque converter. It is widely known as one of the best automatic transmissions ever built. Finding the ID tag can be extremely difficult on the Turbo 35o particularly because, its probably been lost. Standard Borg Warner H.D. 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You can check the cars specifications online to determine if it uses a manual or automatic transmission. and will have no numbers stamped on that deck. A typical Saginaw assembly date stamp would be S313 indicating Saginaw trans produced March 13. 7. The manual 3-speed transmission was standard fare for most of the Chevelle lineup from 1964 thru 1972. Like I said, the Muncie HD is a lot heavier. This can add confusion to what you've found. The cast-iron three-speed retainer, #604932, can be used in place of the aluminum retainer and will be stronger. Shown here is the M20 10-spline wide-ratio input shaft and counter gear. Manual Trans Reference GM 3, 4, 5 and 6 speeds V24 How to identify chevrolet gmc manual transmissions Use the following information to compare physical description of your Chevrolet or GMC manual transmission in order to identify what model transmission is in your vehicle. It functions correctly. In 1974, the two-speed box then went to the great scrap heap in the sky. The problem with checking the owners manual is that a junkyard find wouldnt have one. Above is the transmission ID tag on a 1970 Corvette. Its case is essentially smooth. While the big-block vs. small-block variable is one that has two groups of passionatefollowers, the other reflects the way in which the driver selects transmission gears. Besides the transmission identification, it also helps to figure out which options was the car ordered with by using a VIN decoder tool. M38 Standard Turbo 350 manufactured from 1976 to 1981. You will have to decipher the numbers on the ID tag in order to properly tell exactly what kind of transmission you have. 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. If you examine the 1966-'70 wide-ratio M20 input shaft, there are two grooves cut amid the 10 splines. If it has a cast-iron case with an aluminum side cover and tail housing, that will mean you have found a Borg Warner. V8 engines included 283 and 327. The standard 10-spline input shaft found its way into new Muncie M20 and M21 transmissions from 1971-'74. Do you know how to tell the difference between a Saginaw, a T10, and a Muncie four-speed? Looking for a Muncie shifter engineered to fit within your budget? Engine Casting Numbers Explained 1954-1962 Chevrolet, Serial Number/Engine Type/Series Designation, On the flat part of the Distributor Deck you will find a stamped Serial Number. 20. My question is will this direct swap to a '81 with the 3 speed saginaw? Typical Turbo 350 fluid pan. Transmissions have RPO numbers, usually beginning with "M". On modern models, you can tell which type of manual transmission a car has by looking at the top of the gear shifter. Chevy Hardcore NEWSLETTER - SIGN UP FREE! Terms of Service. the angle of the gear teeth. In the middle is the M21 countershaft and input shaft. By 1963, the General had developed and worked with the Saginaw Corporation to develop a proprietary Chevy four-speed (based on components used in the Borg-Warner transmission). Please click Accept Cookies to continue to use the site. Some transmissions have a code stamped onto them. Tweet 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. On the far right is the M22 26-spline input shaft. 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. It was used on large displacement, high . Comparison images courtesy of Hurst Shifters. The close ratio gearboxs generally came with 3.73+ gear ratio'ed cars. The transmission codes are found on the Protect-O-Plate and in the following locations: . Dave Cruikshank is a lifelong car enthusiast and an editor at Power Automedia. You need to look . 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). Ford didnt offer its automatic transmission until 1951, and Mopar buyers had to wait until 1954. The Turbo 350 quickly became known for its strength, versatility, and compactness. You can find out from the specifications or by checking the foot pedals. (center) Borg Warner (right). Build your own custom newsletter with the content you love from Chevy Hardcore, directly to your inbox, absolutely FREE! How to identify and decode chevrolet manual transmissions. box FWIW. Knowledge of your cars transmission system is helpful during repairs and car restoration projects. THM375 - This transmission is a derivative of the THM400 sharing the external appearance of the 400. 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. Please check your browser settings or contact your system administrator. The 17-character number is a form of code that identifies the vehicle's specifications. The 465 is an intellegently designed . When properly identifying a Saginaw transmission, the casting numbers are a surefire way to know for certain what youre looking at. The muncie reverse lever is in the extention housing, and the cover has 7 bolts. 1976 through 1981 model years. the years that you narrowed it down to when you deciphered the Casting Numbers to the right. Supposing it shifts six times, its a 5-speed system. 17. On modern models, you can tell which type of manual transmission a car has by looking at the top of the gear shifter. 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). Your right, if we knew what the trannys went to , they could be of help to someone if not only for parts. All rights reserved. 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. 250 and 292 inline 6-cylinder engines offered, while a 305 V6 was available only in GMC trucks. PDF file: gm 3 speed manual transmission casting numbers Page: 1 Save this Book to Read gm 3 speed manual transmission casting numbers PDF eBook at our Online Library.. We're transmission experts, recognized by some of the greatest and most notable technicians in the automotive industry. Some of these methods are: All the above-listed methods are dependable ways of identifying a cars transmission. The source serial number is from the CAR the transmission originally went into, NOT the assembly plant. Take the following steps to access and place the transmission pan: Most manufacturers stamp the transmission identification numbers on the transmission housing. It was phased out of use and superseded by GMs 700R4 starting in 1982. The easiest way of knowing your GM transmission is by using a VIN decoder. This is when you have to remove the side cover to see what's inside. Of course, restorers and rebuilders will tend to re-stamp the date code to suit a particular restoration. document.write(theYear) However, classic cars usually have manual transmissions. THM200 - Light duty, "metric" 3 speed transmission. It'll be marked 375-THM on the bottom of the tailshaft housing. Engine Casting Numbers Explained 1954-1962 Chevrolet The Casting Numbers to the right are found just below and to the right of the Distributor on the passenger side. Outside that, you can push in your clutch and hold the brake. Use the following information to compare physical description of your Chevrolet or GMC manual transmission in order to identify what model transmission is, MySpace !function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs"); It was standard equipment on large displacement, high-torque engines, and is generally found in trucks, and full-size GM rear-wheel-drive cars. WinCon Member. Good, solid, rugged construction makes it a terrific drop-in for around $100. 13. General Motors has produced a myriad of versions of its fabled automatic transmissions over the years, although three models make up the bulk of pre-ECM GM slushboxes; the Powerglide, the Turbo-Hydramatic 350 (Turbo 350), and the Turbo-Hydramatic 400 (Turbo 400). A manual transmission requires the driver to switch gears manually. General Motors is an innovator in the automobile industry, and they were one of the early adopters of the automated transmission system. Whats The Reason Enthusiasts Cant Get, Yes I Am A Dinosaur, And Why I Feel Electric Cars, Step-By-Step Birth Of A QA1 Adjustable Racing Shock, Readers Rig: Sterling Diesels Duramax-Powered C10, What I Learned Today With Jeff Smith Ensuring Wrist Pin Clearance, Corvette Enthusiasts Use Media To Share Z06 Delivery, Fenix Is A Next-Gen 69 Camaro With 1,180 Horsepower, Shop Tour: Brian Tooley Racing Expands To Be A One-Stop Shop, Moroso Anti-Roll Kit Is The Right Tool For The Dragstrip, Near where the shift linkage attaches to the body, Just above the housing on the right side of the pan, On the passenger side on a flange by the bell housing. Chevy Automatic Transmission Description & Usage Here's a typical Muncie gearset consisting of First, Second, and Third gear. Transmissions can be identified in the following manner: Casting numbers : Located on the case, extension housing and side cover (manual). Looks to be from a 68/9 camaro. now = new Date It is identified easiest by its 375-THM designation cast in the underside of the tail housing. First, you must check whether its a manual or automatic transmission. They used -E to distinguish the electro Hydra-Matic transmission from other non-electronic ones. But in non-performance applications, they were still a good Chevy four-speed transmission. The code interpretation is (Cleaveland Powerglide, January 23rd, Night shift). The pan contains several stamped numbers and codes informing readers about the transmission system. 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. 1991 and Newer Not only were they both popular transmissions in muscle cars and Corvettes, but many were even used after the muscle car era. The Turbo 400 was GM's heavy-duty three-speed transmission used from 1964 to 1990. be noiser (whines or howls almost like a blower, which is why it's called a "rock crusher") If the gear shifts five times, its a 4-speed transmission. Cangialosi explains there were two basic mainshafts produced for the M20, M21, and M22 transmissions (see Input Shaft Identification chart). We want to make your transmission search as simple as possible. You can get a guide or chart to help you place your transmission pan. CAUTION: This transmission closely resembles 343 Saginaw. Muncie 4-speed or TH400 were the only transmission options available. The 4L80E would be the "electronic" model. There are not too many gearboxes that can make that claim. The visible difference between manual and automatic cars is the third pedal, called a clutch. THM200-R4 - Used in GM rear wheel drive cars with the 3.8 V6, 305 & 350 Olds and 301 pontiac from 1981 to 1989. On the THM700-R4 the VIN is either stamped onto a boss behind the bellhousing flange on the passenger side, just above the pan on the drivers side, or just behind the governor cover, stamped vertically where the case meets the tailshaft housing. That is why we offer multiple ways for you to search for your transmission. Still hoping for some casting number identification assistance, if someone is willing to help. New Process Gear NP435 - 4-speed longitudinal transmission used in a select handful of 67-72 GM pickups General Motors is an innovator of automatic transmissions, introducing the Hydra-Matic in 1940. 1969-1986. Yes, there is a serial number on a transmission. For example, replacing a Powerglide with a Turbo 350 is an easy swap. The transmission pan is a wealth of knowledge because it has various inscriptions concerning the transmission. This early box began its career being placed in the Corvette. Expert advice on car parts, maintenance, and repair. 3L80 - The 3L80 is a renamed THM400, used in the early 1990's. Generally used in straight and V6 and small block engines. (AODE & 4R70W). MX2 Another 350C code. [CDATA[ Main case casting numbers (when looking at the passenger side these numbers are upside down) 6273262, tail shaft housing casting numbers 3968035, Shifter cover casting numbers GM1 3952646.

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