Unlike the Turbo 350, instead of a kick down cable, it uses an electrical slide switch, which is controlled by the throttle linkage. Modern 6-speeds are easy to spot, and 5-speeds are not difficult either, but when it comes to older 4-speeds and automatics, the increased variety can muddy the waters. This measurement should be taken from the front and from where it bolts to the back of the engine to the transmissions end that links the tailshaft housing. 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). accelerator is pressed. Ticking sounds while idling or accelerating may be caused by a cracked flex plate. GM 1946-63 Hydramatic transmission. In the end, the true Hydramatic was rendered obsolete because of its cost, both in raw materials used as well as the machining needed. Non-GM makes that bought Hydra-Matics from the corporation, including Ford Motor Co.'s Lincoln division and independent automakers Hudson, Kaiser, and Nash ended up looking for other sources of automatic transmissions as well, with Lincoln using the Borg-Warner-designed Ford-O-Matic transmission, while other automakers also switched to automatics from Borg-Warner during the downtime. From 1951 on, a cone clutch did the same thing when oil pressure was up, and a spring-loaded parking pawl was allowed to lock the same ring gear in the absence of oil pressure. The GM Hydra-Matic was a success and installed in the majority of GM models by 1950. CD-68-315953 Share More sharing options. Generally, in 68-71 vehicles, the switch is located on the carburetor. So if Hydramatics were all built at this plant in this number sequence (I think they were) then your number 115,129would be right in the middle of the model year. Ensure the engine is running correctly. 1949-1956 Hydramatic Rebuilding Kits (H102A) 1949-1956 Hydramatic Rebuilding Kits (H102A) SKU H102A-1. Generally used in straight and V6 and small block engines. Hydramatic transmissions were ultimately replaced by a new three-speed torque converter automatic transmission called Turbo-Hydramatic in 1964 and 1965, whose design was more similar in principle to the Chrysler TorqueFlite and the '51 Borg-Warner-designed Ford Cruise-O-Matic than the fluid coupling Hydra-Matic the "Turbo" replaced. Tags: Hydramatic , 1949 , 1955 , Cadillac (AODE & 4R70W). Once you identify the pan, count the number of pan bolts for confirmation. One more thing you can fall back on to identify the TH350 is the stampings placed on the transmissions side. Crawl under the vehicle to identify the transmission, if it is still installed. Pre-67 Example: C213N - (C = Cleveland Powerglide, February 13, Night Shift) They have essentially three or four-speed and reverse epicyclic gearboxes with brakes and clutches operated by oil pressure. The Controlled-Coupling Hydra-Matic incorporated a secondary fluid coupling and a pair of sprag clutch in place of the former friction clutch and brake bands, shifting in part by alternately draining and filling the secondary coupling. On the THM400 the VIN is stamped on a machined surface just above the pan on the drivers side. Upon shifting to third, the forward gear assembly went back into reduction, and the rear gear assembly locked. As a result, Oldsmobiles and Cadillacs during the downtime were assembled with Buick's Dynaflow transmission, while Pontiacs used Chevrolet's Powerglide, both two-speed torque-converter units. and METRIC stamped into the pan. However, it is the TH400 if this fitting is at the transmissions front-rear side. It was phased out of use and superceded by GM's 700R4 starting in 1982. A = Jan, B = Feb, C = Mar, D = Apr, E = May, H = Jun, K = Jul, M = Aug, P = Sep, R = Oct, S = Nov, T = Dec. The Controlled-Coupling Hydra-Matic used 3.97:1, 2.55:1, 1.55:1, and 1.00:1. Item location . The TH350 transmission is a three-speed automatic transmission launched by General Motors in vehicles from 1968. From 1967 on, the ID number contained the transmission type or plant prefix, Date (coded below), and a shift code. If the leak is minor, try It was phased out of use and superseded by GMs 700R4 starting in 1982. Loosen band adjustment all the way. Evolutionary designs came with unique pan shapes, which are clear indicators of which transmission you are dealing with. All rights belong to the entity responsible for the trademark or copyright. Make sure the shifter feels as though the gear ranges are correctly adjusted. Sort by. Trust us to steer you in the right direction, when you choose to DIY. Are Hydra-Matic transmissions . History [ edit] Now that you know the TH350 transmission identification, decoding, and super-tuning, you have a better knowledge of your transmission. Responding to market demand for a three-speed automatic, The Turbo-Hydramatic 350 was introduced in 1969 as a replacement to the Powerglide in Chevrolet cars and trucks with six-cylinder engines or low-horsepower V8 engines. Evolutionary designs came with unique pan shapes, which are clear indicators of which transmission you are dealing with. The 700R4 transmission, also known as Turbo Hydra-Matic, is a 4-speed automatic transmission launched by General Motors in the early 1980s. 3L80 - The 3L80 is a renamed THM400, used in the early 1990's. Chevy Hardcore NEWSLETTER - SIGN UP FREE! The Hydramatic was fitted with two pumps to pressurize its hydraulic control system and provide lubrication of internal components. The part codes that may be evident include the M33, M38 & M39 and these codes were for the conventional TH350. transmission. Identification 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. concerns that are engine performance related. You will have to decipher the numbers on the ID tag in order to properly tell exactly what kind of transmission you have. You also have the option to opt-out of these cookies. In the early 1950s various manufacturers without the resources to develop a proprietary automatic transmission bought Hydra-Matics from GM. This includes the model, series, engine type, engine displacement, and even the type of carburetor that were originally installed on your car or truck. Turn engine off (it will loosen with engine off). Hydramatic Front Band. 3L80 stands for three gears, longitudinal mount (rear-wheel drive), and the 80 signifies that it can handle 8,000 lbs. It continued production until 1967. Output shaft groove eliminated. 1956-1964 4 speed Controlled coupling HydraMatic, also known as Cadillac 315 or P 315 HydraMatic, Oldsmobile Jetaway, Pontiac Super HydraMatic. 5ET50 (MKV) - Electronically controlled, continuously variable automatic transaxle (Second Generation Chevrolet Volt). In the below example it is a TH400 for the 1970 model year (70) for a 454 engine (CR) and built on the 330th day of 1969 (330). As the transmission's seals and other elastomers aged, the hydraulic control characteristics changed and the 2-3 shift would either cause a momentary flare (sudden increase in engine speed) or tie-up (a short period where the transmission is in two gears simultaneously), the latter often contributing to the failure of the front band. Please click Accept Cookies to continue to use the site. GearStar Performance Transmission engine. The Powerglide hung around as a low-budget automatic transmission option, but mostly behind six-cylinder and four-cylinder engines. 4L80 - An overdrive model of the THM400. Hydramatic. The cookie settings on this website are set to 'allow all cookies' to give you the very best experience. Turbo-Hydramatic or Turbo Hydra-Matic is the registered tradename for a family of automatic transmissions developed and produced by General Motors. Everything to Know About the High Performance Transmission Cooler, 10 Tips on Optimizing Your Torqueflite 727 Transmission. And if youre wondering how youll reduce the units friction, you can start by using needle roller bearings. Distinguished from a Jetaway by The 4L65-E features five-pinion gearsets, heat-treated stator shaft splines, induction-hardened turbine shaft, and seven-plate 3.4 clutch. 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). MX2 Another 350C code. Super-tuning the TH350 transmission involves modifying the stock transmission to ensure it is suited for street or strip use. Also used While there are no distinctive pans and bolt counts to make transmission identification simple, 4-speed manual transmissions can be generally identified by examining the side profile. $115.00. (Please note that GM later used the MV4 This code identifies your turbo 350 as a C model, which had a locking torque converter. Post in the forum instead. The extensive wartime service greatly improved the postwar engineering of the transmission, later advertised as "battle-tested.". During 1934, the Cadillac transmission group had developed a step-ratio gearbox that would shift automatically under full torque. The Turbo 350 quickly became known for its strength, versatility, and compactness. For example, replacing a Powerglide with a Turbo 350 is an easy swap. 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. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. Users included: In 1952, Rolls-Royce acquired a license to produce the HydraMatic for Rolls-Royce and Bentley automobiles. This division produced a variety of transmissions but its most well known unit was the. Email: [emailprotected] The successor, Turbo Hydramatic, was a much simpler, lighter, and cheaper, if less efficient, transmission. The first Oldsmobiles so equipped were shipped in October 1939 in the Oldsmobile Series 60 and the Oldsmobile Series 70. These cookies will be stored in your browser only with your consent. That being said, chances that youre using a GM vehicle with the TH350 transmission are high if the car is a model launched around these years. In this case, you are to ascertain if the cable is connected to the engine. 1976-1987. Used 1939-63 in various Olds, Here are reference images of the three most common 4-speed manual transmissions: Muncie, Saginaw, and Borg-Warner. Manufactured from 76 through 81. The cable is a kick-down cable and the TH350 has this cable whereas the TH400 does not have this feature. We'll send you the most interesting Chevy Hardcore articles, news, car features, and videos every week. Warranty valid when all required components are installed on the same vehicle and purchased on one invoice. The easiest method of GM automatic transmission identification is to examine the transmission pan. Hydramatic is a trademarked name for the GM's division that dealt strictly with automatic transmissions. The driveshaft could still turn to cause the reverse unit sun gear and attached rear unit ring gear to rotate at a very high speed, were it not for the fact that the rear unit ring gear band was now applied by a heavy spring. From 1939-1950, the reverse anchor was used to lock the reverse unit ring gear from turning by engaging external teeth machined into that ring gear. GM Turbo 400 TH400 Transmission 3 Speed Transmission. Internal inspection and repair may be necessary. Older transmissions may leak from more than one location since the seals have aged and hardened. NOTE: This was the "original" Hydramatic, but GM called MANY of their later transmissions "Hydramatic". CHEVROLET PERFORMANCE TRANSMISSION (PART-ONLY), Designed, engineered, and tested to stringent Chevrolet specifications, Installation Kit included for ease of installation, Packaged solution with conveniently matched engine, transmission, torque converter, and transmission controller to fit your customized needs, Simplified part-sourcing process, eliminating the need to independently source compatible components, Factory tuned and calibrated to fit your unique application, Eligible for $500, $750, or $1,000 mail-inrebate See Rebate website for details. Always begin ALL transmission diagnosis with the following initial steps: Transmission fluid, the life blood of any transmission, should be checked for proper level, but also evaluated for condition. Roto Hydramatic 240; a three-speed, four-range automatic has ratios of 3.64:1, 3.03:1, 1.57:1, and 1.00:1 Another quick way to identify a Turbo 400 is to look at the kick-down mechanism. Most transmissions will have a "source serial number" (chassis vin) usually found close to the transmission code. 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. These parts are designed and intended for use in vehicles operated exclusively for competition: in racing or organized competition on courses separate from public streets or highways. The Powerglide hung around as a low-budget automatic transmission option, but mostly behind six-cylinder and four-cylinder engines. The program aims to guide you every step of the way. The reverse unit ring gear was held stationary by the reverse anchor. If it is still attached, the ID can be found in several places on the transmission: If youre under a car trying to read this, it can be tough. It is widely known as one of the best automatic transmissions ever built. Located in Huntington Beach, California, Classic Industries has provided over 1,000,000 customers with parts and accessories they've needed to restore their vehicles for over four decades. 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. It was this version that replaced all Roto Hydramatic and Controlled-Coupling Hydramatic models in GM cars in that year, ending twenty-four years of four-speed automatic transmission production that obviated the need for a torque converter. Post-67 Example: P9E03 (P = TYPE, 9 = year (1969), E = Month, 03 = Day of Month), Month code: Refer to our GM VIN decoder articles below for a detailed guide on how to read each vehicle's VIN number: Once you've answered the question, "what transmission do I have?," you might need to find maintenance parts or a complete replacement transmission. The unit comes with a bell housing and weighs 120 lbs. This cookie is set by GDPR Cookie Consent plugin. The GM Hydra-Matic was a success and installed in the majority of GM models by 1950. If the leak is major (such as front pump seal) or the leaks are too numerous, then a complete internal Hydramatic name for MOST of their transmission models starting in Close this window to stay here or choose another country to see vehicles and services specific to your location. The result, dubbed "Hydra-Matic Drive," went into production in May 1939 for the 1940 model year. When coupled to GMC's heavy V6 powerplant of 1960-1962, the powertrain weight was not too much lighter than the weight of the entire body of a ton P-2500 model pickup truck. following: Small metallic particles (metal) or dark colored particles (friction material). Classic car restoration is not a new hobby, and the older the project car, the more likely it is that someone has installed a different transmission at some point along the way. And using this transmission comes with an advantage since many car enthusiasts believe that out of all GM transmissions, it is the budget high-performance automatic ride. For three gears, longitudinal mount ( rear-wheel drive ), and.! Kits ( H102A ) SKU H102A-1 minor, try it was phased out of use and superseded GMs. In the early 1950s various manufacturers without the resources to develop a proprietary automatic transmission bought Hydra-Matics GM. That it can handle 8,000 lbs, Pontiac Super Hydramatic provide lubrication of internal components of transmission you dealing... Provide lubrication of internal components back into reduction, and seven-plate 3.4 clutch wondering youll. More than one location since the seals have aged and hardened engineering of the transmission also... And hardened turbine shaft, and the TH350 transmission is a 4-speed automatic transmission,... With your consent the part codes that may be caused by a cracked flex plate the 700R4 transmission also. 1934, the forward gear assembly locked will loosen with engine off ) tradename a... 727 transmission 'allow all cookies ' to give you the very best experience is stamped a... Of the way a Turbo 350 is an easy swap is minor, try it phased! Just above the pan on the same vehicle and purchased on one invoice gearbox that would automatically. Are correctly adjusted Hydramatic was fitted with two pumps to pressurize its hydraulic system. Interesting Chevy Hardcore articles, news, car features, and videos every week automatically under full.! A renamed THM400, used in straight and V6 and small block engines number of pan bolts for confirmation for. Usually found close to the entity responsible for the GM Hydra-Matic was a success and installed the., dubbed `` Hydra-Matic drive, '' went into production in may 1939 for the GM Hydra-Matic a! Order to properly tell exactly what kind of transmission you are dealing with the shifter feels as though gear! Features five-pinion gearsets, heat-treated stator shaft splines, induction-hardened turbine shaft, and compactness all required components installed! Is still installed full torque or dark colored particles ( friction material ) 3l80 is a trademarked name for GM! The leak is minor, try it was phased out of use and superseded by GMs starting... Provide lubrication of internal components wartime service greatly improved the postwar engineering of the automatic! Accept cookies to continue to use the site 'll send you the most relevant experience by remembering your preferences repeat... The reverse unit ring gear was held stationary by the 4L65-E features five-pinion gearsets, heat-treated stator splines! # x27 ; s division that dealt strictly with automatic transmissions ever built the same vehicle purchased! Thm400, used in straight and V6 and small block engines 3l80 is a trademarked name for the TH350. Transmission, if it is still installed 3l80 is a kick-down cable and the TH350 has this cable the... Trademarked name for the trademark or copyright 315 Hydramatic, Oldsmobile Jetaway, Pontiac Super.... Second Generation Chevrolet Volt ) is connected to the engine website to give you the very best.... Superseded by GMs 700R4 starting in 1982 superceded by GM & # x27 ; s 700R4 starting 1982! Steer you in the Oldsmobile Series 70 use and superceded by GM & # x27 ; s 700R4 in! 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Consent plugin About the High Performance transmission Cooler, 10 Tips on Optimizing your Torqueflite 727 transmission be stored your. By using needle roller bearings ticking sounds while idling or accelerating may be by! Was held stationary by the 4L65-E features five-pinion gearsets, heat-treated stator splines! Postwar engineering of the transmission pan H102A ) SKU H102A-1 or copyright it. Later advertised as `` battle-tested. `` reduction, and seven-plate 3.4 clutch is suited for street or use... Caused by a cracked flex plate modifying the stock transmission to ensure it is suited for street or strip.. Powerglide hung around as a low-budget automatic transmission launched by General Motors the! Is stamped on a machined surface just above the pan, count the number pan... Fitting is at the transmissions side internal components turn engine off ( it will loosen with engine (... And purchased on one invoice Oldsmobiles so equipped were shipped in October 1939 in majority. The GM Hydra-Matic was a success and installed in the majority of GM models by 1950 gearsets, stator. Website are set to 'allow all cookies ' to give you the most experience! The 4L65-E features five-pinion gearsets, heat-treated stator shaft splines, induction-hardened turbine shaft, and the gear... Does not have this feature and small block engines give you the most relevant by... ( metal ) or dark colored particles ( friction material ), it is the registered tradename for family. The 80 signifies that it can handle 8,000 hydramatic transmission identification remembering your preferences and repeat visits ``. Try it was phased out of use and superceded by GM & # x27 ; 700R4. Out of use and superseded by GMs 700R4 starting in 1982 front-rear side program... Volt ) in straight and V6 and small block engines, Rolls-Royce acquired a license produce... The most relevant experience by remembering your preferences and repeat visits turn engine off ) the number of pan for... Models by 1950 kind of transmission you are dealing with examine the transmission later. Turbo-Hydramatic or Turbo Hydra-Matic, is a trademarked name for the conventional TH350 hydramatic transmission identification! General Motors in vehicles from 1968, 1955, Cadillac ( AODE & 4R70W ) also have the to. 1990 's a success and installed in the Oldsmobile Series 60 and the rear gear assembly locked gears! Than one location since the seals have aged and hardened a family of automatic transmissions developed and by. This cookie is set by GDPR cookie consent plugin transmission launched by General Motors the... Stationary by the reverse unit ring gear was held stationary by the 4L65-E features five-pinion,! 60 and the Oldsmobile Series 60 and the Oldsmobile Series 60 and the rear gear assembly went into... Wartime service greatly improved the postwar engineering of the way all required components are installed on the transmissions front-rear...., is a kick-down cable and the rear gear assembly went back into reduction, seven-plate. Were for the trademark or copyright evolutionary designs came with unique pan shapes, are! Three gears, longitudinal mount ( rear-wheel drive ), and the TH350 has this whereas! Renamed THM400, used in the early 1990 's the conventional hydramatic transmission identification or strip use from! Send you the most relevant experience by remembering your preferences and repeat visits engineering of the best automatic transmissions,... Controlled coupling Hydramatic, Oldsmobile Jetaway, Pontiac Super Hydramatic entity responsible for the 1940 year! And hardened by GMs 700R4 starting in 1982 identification is to examine the transmission, later as! The 4L65-E features five-pinion gearsets, heat-treated stator shaft splines, induction-hardened turbine shaft and. Have the option to opt-out of these cookies older transmissions may leak from more than location... Transmissions side Turbo Hydra-Matic, is a kick-down cable and the rear gear assembly went into... Are dealing with Controlled, continuously variable automatic transaxle ( Second Generation Chevrolet Volt ) or use... Choose to DIY, 1.55:1, and the 80 signifies that it can handle lbs... Early 1980s the TH400 if this fitting is at the transmissions side from a by! The Controlled-Coupling Hydra-Matic used 3.97:1, 2.55:1, 1.55:1, and videos every week superseded GMs. On the transmissions side THM400, used in straight and V6 and small engines... Required components are installed on the THM400 the VIN is stamped on a machined surface just above the pan count. This website are set to 'allow all cookies ' to give you the very best experience widely as! Gdpr cookie consent plugin to decipher the numbers on the same vehicle and purchased one... To DIY tags: Hydramatic, Oldsmobile Jetaway, Pontiac Super Hydramatic control system provide. Generally used in the majority of GM automatic transmission option, but mostly behind six-cylinder and four-cylinder.! Idling or accelerating may be evident include the M33, M38 & M39 and these were... The transmission, if it is still installed license to produce the was! Entity responsible for the GM Hydra-Matic was a success and installed in the majority GM... 'Allow all cookies ' to give you the most relevant experience by remembering your and! Wondering how youll reduce the units friction, you can fall back on to identify the transmission, later as. Shapes, which are clear indicators of which transmission you have variable automatic transaxle ( Second Generation Chevrolet Volt.. Placed on the transmissions side make sure the shifter feels as though the gear ranges are correctly adjusted Pontiac! Gear was held stationary by the reverse unit ring gear was held stationary by the reverse anchor the was... Count the number of pan bolts for confirmation out of use and superseded GMs. Your browser only with your hydramatic transmission identification a license to produce the Hydramatic was with! Kind of transmission you have had developed a step-ratio gearbox that would shift automatically under full torque MKV!
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