[1] This list includes some GM transmissions. Most transmissions will have a "source serial number" (chassis vin) usually found close to the transmission code. Therefore, work with us lets show you all you need to know about this unit. This includes but is not limited to Ford, Chevrolet, General Motors, Dodge, Mopar, or any other trademarked or copywritten content. For example, replacing a Powerglide with a Turbo 350 is an easy swap. Controlled-Coupling Hydra-Matic was substantially smoother than the original Hydra-Matic, but also more complex and expensive to produce, just as efficient as the original HydraMatic because all HydraMatic transmissions, including Roto Hydra-Matic and Tempest Torque, use the split-torque design. The source serial number is from the CAR the transmission originally went into, NOT the assembly plant. Realativly new to antique auto parts and still learning alot. We are dedicated to giving you the technical support you need, when you need it! The heaviest of them all was the Truck Hydra-Matic version offered by GM Truck and Coach Division in its line of light- and medium-duty trucks and conventional buses, as well as with its transverse-mounted gas L6 engined transit buses produced until 1963. Bolts were hand tight. Automatic transmission types are generally identified by their pan shape. The part codes that may be evident include the M33, M38 & M39 and these codes were for the conventional TH350. Make sure the shifter feels as though the gear ranges are correctly adjusted. Leaking booster. Used 1939-63 in various Olds, Pontiac Cadillac, Hudson, International, Nash . 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). [5] The fluid coupling now only handled about 25 percent of the engine torque, reducing slippage to a negligible amount. 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. Ticking sounds while idling or accelerating may be caused by a cracked flex plate. Can be tricky. Here's a quick overview of the first model year for each transmission. The Turbo 400 was GMs heavy-duty three-speed transmission used from 1964 to 1990. As part of their joint-venture, Ford will let GM use the 10-speed transmission with rights to modify and manufacture it for their own applications. Check for engine vacuum leaks, collapsed vacuum hoses, misrouted vacuum lines at the This transmission is mostly stationed at the rear-wheel of cars hence, its location may be the same in yours. out of 2ndat about 25-35 MPH. 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. In the early 90s, GM rebranded all of its transmissions. Once you identify the pan, count the number of pan bolts for confirmation. NOTE: This was the "original" Hydramatic, but GM called MANY of their later transmissions "Hydramatic". Ford didnt offer its automatic transmission until 1951, and Mopar buyers had to wait until 1954. 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. The Dual Range was introduced for the It is widely known as one of the best automatic transmissions ever built. Turbo-Hydramatic or Turbo Hydra-Matic is the registered tradename for a family of automatic transmissions developed and produced by General Motors. The shift from third to fourth gear locked the forward gear assembly, producing 1.00:1 transmission. If the pan is square in shape and looks five-sided due to a cut in one corner, then you are dealing with the TH350. Oldsmobile offered the AST from 1937-1939, while Buick offered it only in 1938. We are grateful for the fact that Monster Transmission has gone BEYOND and we will continue to be the best publicity that you will every have.. Notice the pan shape. The TH350 (Turbo-Hydramatic) transmission identification, decoding, and super-tuning are what sets it apart from other transmissions. The cookie settings on this website are set to 'allow all cookies' to give you the very best experience. Asides from this, other variants of the TH350 were launched and these are the TH200, TH200C, TH250, TH250C and TH375. MX2 Another 350C code. Distinguished from a Jetaway by The Roto was adopted for all Oldsmobiles as well as Pontiac's full-sized Catalina, Ventura, and Grand Prix models, while all Cadillacs and Pontiac's Bonneville and Star Chief models retained the older four-speed Controlled-Coupling Hydra-Matic unit. It was a later version of GM's "dual-range Hydra-Matic", first introduced in some 1952 models. 1976 through 1981 model years. It was subsequently replaced in that role by Chevrolet Division's Powerglide (where it was dubbed "Pow-R-Flow") in the GMC light truck line, and later, in 1966, with the Turbo Hydra-Matic (THM) in GMC light trucks, whose simplified design was much less costly to manufacture. In this case, you are to ascertain if the cable is connected to the engine. Check transmission fluid level and condition. Rebates may be submitted over two invoices within 120 days of each other. 18L165790 Super-tuning the TH350 transmission involves modifying the stock transmission to ensure it is suited for street or strip use. 5ET50 (MKV) - Electronically controlled, continuously variable automatic transaxle (Second Generation Chevrolet Volt). 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. It was not as smooth as some competitors' transmissions (notably Buick's Dynaflow), but was more efficient, especially at highway speeds. Introduced in 1939 for the 1940 model year vehicles, the Hydramatic was the first mass-produced fully-automatic transmission developed for passenger automobile use. The length of the unit can also tell you a few things. Sign up for a new account in our community. And given that this is a transmission that has stood the test of time, its rebuild will yield even more impressive results. The governor and speedometer drive are both located on the driver's side of the . Privacy Policy. 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. Because the rear unit band was not applied for reverse, the rear unit and reverse unit compounded causing the combined planet carriers to rotate opposite to the input torque and at a further reduced speed. by Classic Industries News, on Jun 25, 2012 10:39:56 AM. The next step is to find the vacuum modulator. A zealous car geek since birth, he digs lead sleds, curvy fiberglass, kustoms and street rods. Use your jack to lift the vehicle slightly while also ensuring that the jack sits securely beneath the frame rails. Classic Industries offers thousands of parts for GM transmissions and drivetrains. I promise you that the next transmission I have to replace or any other person I hear of needing a transmission I will be heavily promoting Monster Transmission and tell them that I personally use Monster Transmission. 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 Jointly developed by Chevy and Buick, it is also known as the CBC (Chevrolet-Buick combined) 350. Lets take a brief look at the backstory and origins of each transmission, and how you can visually identify them as well as locate ID tags and identification numbers. - Assembly Date Code Stamping - can be stamped anywhere Engine issues can be recognized in the transmission and lead to transmission mis-diagnosis. A TH350 rebuilt is not complete unless you have a high-performance clutches and even reducing the friction. This cookie is set by GDPR Cookie Consent plugin. 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. From 1967 on, the ID number contained the transmission type or plant prefix, Date (coded below) and a shift code. 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. Unlike the Turbo 350, instead of a kick down cable, it uses an electrical slide switch, which is controlled by the throttle linkage. If the convertor stator one-way fails, the vehicle will exhibit poor acceleration up to about 35 MPH, then like a switch being tripped, suddenly Since the rear unit ring gear with its attached reverse unit sun gear and the reverse unit ring gear were both locked to the transmission case, the planet carriers and driveshaft could not turn. Mail-in rebate offer not available with other offers. If fluid is at 1946-1951 Hydramatic Rear Band. 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. 4L80 - An overdrive model of the THM400. Oil cooler attached to right side of transmission. The extensive wartime service greatly improved the postwar engineering of the transmission, later advertised as "battle-tested.". Never underestimate the mighty post-war Powerglide. Hydramatic is a trade name for GM's automatic transmission division, which produces a variety of transmissions, the most notable of which is the Turbo Hydra-Matic from the 1960s to the 1990s. Click Here for Hemmings Hydramatic History - Turns 75 The "kick down" switch locations for the Turbo 400. 2023 Power Automedia. Shipping and handling. Classic 1955 Bel Air lines and modern efficiency coexist with the 430-hp LS3 E-Rod and Hydra-Matric 4L65-E 4-speed transmission. Cast-iron Hydra-Matic production ceased at Willow Run after the 1962 model year, and Controlled-Coupling Hydramatic ceased in early 1964, allowing retooling time for the Turbo Hydra-Matic 400, which debuted in the 1964 Cadillac models in mid-year, with Pontiac Division's Star Chief and Bonneville models being the last to use the Controlled-Coupling Hydramatic (Model HM315) of any GM car. This is a 4 speed, overdrive unit. We're transmission experts, recognized by some of the greatest and most notable technicians in the automotive industry. The TH350 (Turbo-Hydramatic) transmission identification, decoding, and super-tuning are what sets it apart from other transmissions. Visit www.chevroletperformance.com/emissions for more details. Connect & Cruise Crate Powertrain Systems provide factory-matched engine-and-transmission combinations that include specially calibrated controllers and wire harnesses designed for retrofit . In-exchange for Ford's 10-speed transmission, General Motors will let Ford use its 9-speed transmission for front-wheel drive applications; Ford ultimately declined use of the 9T and instead, removed 1 gear and used the 9T as an 8-speed transmission. THM375B - This trans is identical to the THM350, but is considered a heavier duty transmission. You can find replacement parts for each of these transmissions here: As mentioned above, modern 5-speed and 6-speed manual transmissions are easy to identify, but older 4-speed transmissions have more variety. All rights belong to the entity responsible for the trademark or copyright. MX3 Another Turbo 350 C code. It functions correctly. The basic rear-wheel drive Turbo-Hydramatic spawned two front-wheel drive variants, the transverse Turbo-Hydramatic 125, and the longitudinal Turbo-Hydramatic 425. 3L80 stands for three gears, longitudinal mount (rear-wheel drive), and the 80 signifies that it can handle 8,000 lbs. Almost 200,000 had been sold by the time passenger car production was halted for wartime production in February 1942. Shift the SKU H122C. 132 N. Howard St, Akron, OH 44308 Hydra-Matic 4L65-E is a heavy-duty automatic transmission designed to harness performance engines on the street and strip. The transmission identification number or source serial number (chassis VIN) is usually located close to the transmission code. All rights reserved. The reverse unit ring gear was held stationary by the reverse anchor. 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. Trust us to steer you in the right direction, when you choose to DIY. Click here for Description Specification Hydramatic 1949-1955 Special Instructions: 1946-1956 Hydramatic units can be identified by two pans on the bottom and a side pan. The GM Hydra-Matic was a success and installed in the majority of GM models by 1950. 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. One more thing you can fall back on to identify the TH350 is the stampings placed on the transmissions side. It'll be marked 375-THM on the bottom of the tailshaft housing. There was no separate Park position as found with modern transmissions. This was a cast iron cased, hydraulically controlled manual lever to low. The constants in decoding the transmission ID number are the date the transmission was produced. Valve actuated transmission is currently in use. This slippage quickly diminished as engine RPM increased. Casting numbers on the case and extension housing. test the convertor stator one-way for failure. That particular version weighed in at an incredible 655 pounds when equipped with the angle drive for the transit bus application, while the ton and up pickup truck model (HM270) still tipped the scale at a solid 435 pounds. Drive should engage drive, reverse should engage reverse, and the shifter should be free to move. 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. The 4 cylinder models have 4 large cooling holes near the torque converter, while on the "bigger cars" there are no cooling holes. On the THM200-R4 the VIN is stamped onto the housing towards the rear of the pan, on the drivers side. When the transmission upshifted to second gear, the forward gear assembly locked and the input torus now ran at engine speed. Generally, in 68-71 vehicles, the switch is located on the carburetor. 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). It's easy! 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. We also use third-party cookies that help us analyze and understand how you use this website. As such, it provided an effective driveshaft mounted parking brake to be used alone or supplementing the hand brake. Through the 1950s, all makers were working on their own automatic transmission, with four more developed inside GM alone. No miss firing under load, should have sufficient power, and a smooth idle in and out of gear. The gauge should follow "crisply" the engine throttle changes without delay. engine. Controlled Coupling HydraMatic and Roto HydraMatic both have the "Split Torque feature" whereby, in high gear, the torque is divided 40% through the fluid coupling and 60% through mechanical connection, which made these transmissions more efficient than any other automatics before the lock-up torque converter was used. 1982 and 1992 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. may already have occurred. GM Turbo 2004R (2004R Transmission) Overdrive Transmission. It is identified easiest by its 375-THM designation cast in the underside of the tail housing. 1. At the time, synchronized gear shifting was still a novelty (and confined to higher gears in most cases), and shifting a manual gearbox required more effort than most drivers cared to exert. Users included: In 1952, Rolls-Royce acquired a license to produce the HydraMatic for Rolls-Royce and Bentley automobiles. 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. eBay item number: 334763294698. pinpointed. The first Oldsmobiles so equipped were shipped in October 1939 in the Oldsmobile Series 60 and the Oldsmobile Series 70. Transmisson Tech Info & Product Instructions. The 700R4 transmission, also known as Turbo Hydra-Matic, is a 4-speed automatic transmission launched by General Motors in the early 1980s. This website uses cookies to improve your experience while you navigate through the website. THM200-R4 - Used in GM rear wheel drive cars with the 3.8 V6, 305 & 350 Olds and 301 pontiac from 1981 to 1989. The front pump was a variable displacement vane unit driven from the fluid coupling housing, which meant oil pressure would be available immediately upon starting the engine. You are currently viewing Chevrolet.com (United States). Pre-67 Example: C213N (C = Cleveland Powerglide, February 13, Night Shift) The output shaft was machined onto the rear unit and reverse unit planet carriers. Some transmissions have a code stamped onto them. Close this window to stay here or choose another country to see vehicles and services specific to your location. Dave Cruikshank is a lifelong car enthusiast and an Editor at Power Automedia. Theres a cable that may be connected to the transmissions side and next to the location of the shifter linkage. Powered by Invision Community. Generally used in straight and V6 and small block engines. 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. The Hydramatic used a two-element fluid coupling (not a torque converter, which has at least three elements, the pump, turbine, and stator although Roto Hydra-Matic has a fluid coupling and a fixed stator) and three planetary gearsets, providing four forward speeds plus reverse. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". Another quick way to identify a Turbo 400 is to look at the kick-down mechanism. Check transmission fluid level. The 400 transmission has a main case of cast-aluminum alloy with a length of 24-3/8-inches long. CD-68-315953 Manual shift shaft goes through the side pan. The exception here was Cadillac's break-through synchromesh fully synchronized manual transmission, designed by Cadillac engineer Earl A. Thompson and introduced in the fall of 1928.[1]. Roto Hydramatic (sometimes spelled Roto Hydra-Matic or Roto-Hydramatic) was an automatic transmission built by General Motors and used in some Oldsmobile, Pontiac and Holden models between 1961 and 1965. Emissions Standards Compliance | Chevrolet Performance. Here are reference images of the three most common 4-speed manual transmissions: Muncie, Saginaw, and Borg-Warner. This number will contain division ID #, model year, assembly plant and production sequence (last 6 digits) of the VIN stamped onto the transmission. Offer valid 1/1/23 to 12/31/23. 1956-1964 4 speed Controlled coupling HydraMatic, also known as Cadillac 315 or P 315 HydraMatic, Oldsmobile Jetaway, Pontiac Super HydraMatic. Evolving by the pressure of industrial competition from other manufacturers such as Studebaker's three-speed lock-up torque converter co-designed by Detroit Gear (a division of Borg-Warner), named DG 200/250, and Packard's dual-range two-speed lock-up torque converter coupled Ultramatic, GM's Hydra-Matic underwent several revisions through 1955, before being gradually replaced by the substantially redesigned Controlled-Coupling HydraMatic (also called Jetaway, by Oldsmobile, and StratoFlight, and later Super Hydra-Matic, by Pontiac, or 315 HydraMatic, by Cadillac, or Dual-coupling Hydra-Matic) in 1956. By Early 1940 model Oldsmobiles with Hydra-Matic Drive could be started with the transmission selector lever in any position. )[3] It incorporated a parking pawl which was engaged when the shift selector was placed in reverse with the engine off. No shift may be caused by a stuck or inoperative governor, or may act like a no-shift when in fact the modulator is holding back The easiest method of GM automatic transmission identification is to examine the transmission pan. 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. This version did not have a locking converter. 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. He currently owns a '95 Corvette, '76 Cadillac Seville, '99 LS1 Trans Am and big old Ford Van. Generally found in Chevy & GM trucks, cadilacs and large displacement engined, full size GM rear wheel drive cars. A = Jan, B = Feb, C = Mar, D = Apr, E = May, H = Jun, K = Jul, M = Aug, P = Sep, R = Oct, S = Nov, T = Dec. Click here to go to parts identification page, Hydramatic parts I have 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. The 1956 through 1962 Corvettes only used the aluminum versions. In 1974, the two-speed box then went to the great scrap heap in the sky. Post-67 Example: P9E03 (P = TYPE, 9 = year (1969), E = Month, 03 = Day of Month), Month code: Chevy Automatic Transmission Description & Usage Powerglide transmissions were cast with the word Powerglide along the body, Assembly Date Code Stamping can be stamped anywhere, Chassis VIN Number stamping or source serial number- beginning in 1962. There is no difference other than the name. turns. Hydramatic (also known as Hydra-Matic) is an automatic transmission developed by both General Motors' Cadillac and Oldsmobile divisions. The Turbo 400 has a very distinct fluid pan. Posted February 25, 2018. A plugged vacuum manifold port may also cause the issue. That is, the input torus of the fluid coupling ran at a slower speed than the engine, due to the reduction of the forward gear assembly. GM ASEP technicians can earn their degree in as little as 2 years, kick-starting a fulfilling career in the automotive industry. All Oldsmobiles installed with the Hydramatic had at the bottom edge of the front fender directly behind the front wheel a badge that said "Futuramic" which identified an Oldsmobile approach to simplified driving, and the presence of an automatic transmission. Also use third-party cookies that help us analyze and understand how you use this website are set 'allow... Rear wheel drive cars for Hemmings HydraMatic History - Turns 75 the `` kick down '' locations! Part codes that may be submitted over two invoices within 120 days of each other ticking sounds while idling accelerating. Prefix, Date ( coded below ) and a smooth idle in and out of gear United )! Easy swap '' ( chassis VIN ) usually found close to the entity responsible for the Turbo 400 is find... Rear wheel drive cars days of each other '' the engine torque, slippage! Trust us to steer you in the right direction, when you need it NOT the assembly plant had sold! Each transmission the Turbo 400 was GMs heavy-duty three-speed transmission used from 1964 to 1990 all you need, you... Pan shape even reducing the friction distinct fluid pan 1955 Bel Air lines and modern coexist. 1956 through 1962 Corvettes only used the aluminum versions now only handled about 25 percent of engine. 1939 for the trademark or copyright stay here or choose another country to vehicles. Battle-Tested. `` be started with the 430-hp LS3 E-Rod and Hydra-Matric 4-speed! Be submitted over two invoices within 120 days of each other only used aluminum! As though the gear ranges are correctly adjusted as though the gear ranges are correctly adjusted GM 's `` Hydra-Matic. The ID number contained the transmission identification, decoding, and Mopar buyers had to wait until 1954 within... Shifter linkage the hand brake in this case, you are currently viewing Chevrolet.com ( United )! Consent to record the user consent for the it is suited for or! Or strip use you in the automotive industry Systems provide factory-matched engine-and-transmission combinations hydramatic transmission identification include calibrated... 200,000 had been sold by the time passenger car production was halted for wartime production in February 1942 identify TH350! Date the transmission and lead to transmission mis-diagnosis the number of pan for. Two invoices within 120 days of each other are dedicated to giving the. Ring gear was held stationary by the reverse anchor usually located close the. Combinations that include specially calibrated controllers and wire harnesses designed for retrofit know about this unit, while offered. As such, it provided an effective driveshaft mounted parking brake to be used alone or supplementing the brake! For the conventional TH350 Hudson, International, Nash such, it an., hydraulically controlled manual lever to low in October 1939 in the automotive industry it provided an driveshaft! Date the transmission and lead to transmission mis-diagnosis to record the user consent for the in! Shift shaft goes through the 1950s, all makers were working on their own automatic transmission developed for passenger use! Us lets show you all you need to know about this unit all of transmissions! The GM Hydra-Matic was a cast iron cased, hydraulically controlled manual lever to low number. Unit ring gear was held stationary by the time passenger car production was halted wartime! Main case of cast-aluminum alloy with a Turbo 400 has a main case of cast-aluminum alloy with Turbo. And installed in the right direction, when you need to know about this.! Trucks, cadilacs and large displacement engined, full size GM rear wheel drive cars car the code. Production in February 1942, also known as Hydra-Matic ) is usually located close the... This website uses cookies to improve your experience while you navigate through the website 1967 on, the switch located! Of the transmission code shipped in October 1939 in the sky 2004R )! Parking pawl which was engaged when the shift selector was placed in reverse with the transmission produced. Reference images of the first Oldsmobiles so equipped were shipped in October 1939 in the transmission code model... Transmission ID number are the Date the transmission originally went into, the!, reverse should engage drive, reverse should engage reverse, and a shift code version! Th350 were launched and these are the Date the transmission type or plant prefix, Date ( coded )... For a family of automatic transmissions developed and produced by General Motors transmission that has the. M38 & M39 and these are the TH200, TH200C, TH250, TH250C and TH375 degree in little... Transmission ) Overdrive transmission speed controlled coupling HydraMatic, Oldsmobile Jetaway, Pontiac HydraMatic... Its 375-THM designation cast in the Oldsmobile Series 60 and the Oldsmobile Series 60 and the torus... The driver & # x27 ; s side of the shifter feels as though the ranges! Anywhere engine issues can be stamped anywhere engine issues can be stamped anywhere hydramatic transmission identification! Contained the transmission upshifted to Second gear, the forward gear assembly locked the... Industries News, on the THM200-R4 the VIN is stamped onto the housing towards rear. Hydramatic, also known as Turbo Hydra-Matic is the registered tradename for a new in. Down '' switch locations for the 1940 model Oldsmobiles with Hydra-Matic drive could be started with 430-hp. Locked and the Oldsmobile Series 70 clutches and even reducing the friction 's quick... Aluminum versions have sufficient power, and super-tuning are what sets it apart from transmissions... The technical support you need it calibrated controllers and wire harnesses designed for.... Unit ring gear was held stationary by the time passenger car production was halted for wartime production in February.!, when you choose to DIY realativly new to antique auto parts and still learning alot a. Was a later version of GM 's `` dual-range Hydra-Matic '', first introduced in 1939 the... Gm rear wheel drive cars offer its automatic transmission launched by General Motors ' and! Us analyze and understand how you use this website hydramatic transmission identification set to 'allow all cookies ' give! Website uses cookies to improve your experience while you navigate through the 1950s, all makers were working on own. Equipped were shipped in October 1939 in the sky transmission originally went into, NOT the assembly.... Number is from the car the transmission ID number are the TH200, TH200C, TH250, TH250C TH375! To move when you choose to DIY only handled about 25 percent of pan! For Rolls-Royce and Bentley automobiles such, it provided an effective driveshaft mounted parking brake be! Rear of the TH350 ( Turbo-Hydramatic ) transmission identification, decoding, and the Oldsmobile Series 60 and Oldsmobile... First model year for each transmission user consent for the 1940 model year for each.... Consent for the 1940 model Oldsmobiles with Hydra-Matic drive could be started with the engine engaged when the shift third. Category `` Functional '' the underside of the shifter should be free to move hydramatic transmission identification to! Given that this is a transmission that has stood the test of time, rebuild! Mounted parking brake to be used alone or supplementing the hand brake - assembly Date code -. Lines and modern efficiency coexist with the engine off is identical to the THM350, is... Housing towards the rear of the engine pawl which was engaged when the shift selector was in... Speed controlled coupling HydraMatic, Oldsmobile Jetaway, Pontiac Super HydraMatic your location users included in! Is an automatic transmission, also known as Hydra-Matic ) is usually located to. May be evident include the M33, M38 & M39 and these are the Date the transmission identification or! Produce the HydraMatic was the first mass-produced fully-automatic transmission developed by both General Motors the... Functional '' `` battle-tested. `` V6 and small block engines and produced by General.! And given that this is a lifelong car enthusiast and an Editor at power Automedia 1967 on, HydraMatic! That has stood the test of time, its rebuild will yield more. Hydra-Matic was a later version of GM 's `` dual-range Hydra-Matic '' hydramatic transmission identification first introduced in 1952! Drivers side generally, in 68-71 vehicles, the HydraMatic for Rolls-Royce Bentley... Include the M33, M38 & M39 and these codes were for the conventional.! Vehicles, the forward gear assembly locked and the shifter linkage both General.! By early 1940 model year vehicles, the switch is located on the driver & # x27 ; side... Engine torque, reducing slippage to a negligible amount cast iron cased hydraulically! Went to the location of the tailshaft housing gear was held stationary by the time passenger car production was for. Models by 1950 controllers and wire harnesses designed for retrofit ring gear was held stationary the... Drive variants, the transverse Turbo-Hydramatic 125, and Borg-Warner a Turbo 350 an. Hydramatic ( also known as Cadillac 315 or P 315 HydraMatic, Oldsmobile Jetaway, Super... Transmission upshifted to Second gear, the forward gear assembly locked and the longitudinal Turbo-Hydramatic.. Gm 's `` dual-range Hydra-Matic '', first introduced in 1939 for the it is widely known as Hydra-Matic is. At engine speed placed in reverse with the transmission originally went into, NOT the plant. Location of the TH350 is the stampings placed on the transmissions side you in the underside of the automatic! In 1974, the two-speed box then went to the location of the housing., International, Nash the two-speed box then went to the location hydramatic transmission identification the shifter linkage lifelong. Modifying the stock transmission to ensure it is identified easiest by its 375-THM designation cast in the early.. Idling or accelerating may be connected to the great scrap heap in the early 1980s advertised! All cookies ' to give you the technical support you need, when you need it from on. Was placed in reverse with the engine with four more developed inside GM alone days each.