Usual crude at the bottom and on the screen. 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. If all looks good, try another modulator. Last edited on 26 December 2022, at 17:33, Learn how and when to remove this template message, Vulcan (Vulcan-Werke Hamburg und Stettin), "Hydra-Matic History: The First Automatic Transmission", World's First Mass Produced Automatic Transmission, https://en.wikipedia.org/w/index.php?title=Hydramatic&oldid=1129688607, This page was last edited on 26 December 2022, at 17:33. This transmission is mostly stationed at the rear-wheel of cars hence, its location may be the same in yours. Analytical cookies are used to understand how visitors interact with the website. This was a cast iron cased, hydraulically controlled Coverage limited to defects in material and/or workmanship of the specific part only. Sales & Info: 330-434-5216 Item location . Usually, bands are applied by a servo and released by spring pressure, but in this case, the band was held off by the servo and applied by spring pressure (actually, when the engine was running, the band was applied by a combination of spring pressure assisted by oil pressure). Powered by Invision Community. GM Transmissions: GM Power Glide 2 Speed Transmission. - Assembly Date Code Stamping - can be stamped anywhere A 3-speed light-duty version of the Turbo Hydra-Matic, called the Turbo-Hydramatic 180 was produced by GM's Hydra-Matic division from 1981 to 1998 for use in a wide variety of small cars and trucks. In this EPIC level of technical detail video we go over how to identify the correct casting numbers, intended engine application, and assembly date for the G. It's easy! Transmisson Tech Info & Product Instructions. This feature made it possible to push-start a vehicle with a dead battery if the vehicle could be accelerated to at least 1520mph (2432km/h). By clicking Accept, you consent to the use of ALL the cookies. Also, the original Hydramatic required periodic band adjustments as a routine maintenance item that later versions did not. A TH350 rebuilt is not complete unless you have a high-performance clutches and even reducing the friction. GM ASEP technicians can earn their degree in as little as 2 years, kick-starting a fulfilling career in the automotive industry. the shift since the vacuum signal to the transmission may be wide open throttle. This page covers automatic trannies. About nine weeks after the Livonia fire, GM opened up a new source for Hydra-Matic production at Willow Run, Michigan. NOTE: This was the "original" 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 constants in decoding the trans ID number are the date the transmission was produced. 4 speed Hydramatic Identification By Guest shuhta, December 21, 2011 in General Discussion Followers Guests Posted December 21, 2011 Please help me identify this hydramatic transmission. THM250 - Used in small 4 cylinder cars (Vega, Sunbird, Monza) from 1973 to 1981 and some Nova/Camaro/Chevelle 6 cylinders in 1974 & 75. Both GMC and Chevy numbers were stamped on a oval plate that was rivited on the passenger side of the transmission case or on lower left hand rear of case. 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. [2] This will Older transmissions may leak from more than one location since the seals have aged and hardened. 1946-1951 Hydramatic Rear Band. Chevrolet Division's light truck line used the less-than-adequate Powerglide all through the 1960s until Turbo-Hydramatic was made standard in 1969. Loosen band adjustment all the way. The Controlled-Coupling Hydra-Matic used 3.97:1, 2.55:1, 1.55:1, and 1.00:1. Are the other numbers date of assembly or something? Share More sharing options. Post-67 Example: P9E03 - (P = TYPE, 9 = year (1969), E = Month, 03 = Day of Month), Month code: (NOTICE this is NOT in alphabetic order) It was not as smooth as some competitors' transmissions (notably Buick's Dynaflow), but was more efficient, especially at highway speeds. Drive should engage drive, reverse should engage reverse, and the shifter should be free to move. Once you identify the pan, count the number of pan bolts for confirmation. On this Wikipedia the language links are at the top of the page across from the article title. 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). Members; 834 Share; Posted February 25, 2018. All rights belong to the entity responsible for the trademark or copyright. Fluid level should be at correct range hot, be free of bubbles on the dip stick, and not be excessively dark, watery or appear Clicking and squeaking that follows road speed changes may be caused by a universal joint. The stock transmission may be able to withstand the impact but only to a certain degree, which brings about the need for super tuning to handle high-performance applications. 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. Can be tricky. Shop Tour: Brian Tooley Racing Expands To Be A One-Stop, Moroso Anti-Roll Kit Is The Right Tool For The, Why You Need A Proper Fuel Tank Vent In Your, Steer Your Classic Ride Straight With A New CPP Steering, NEW LS Bellhousing For Magnum And T56-Shifted Hot, Fenix Is A Next-Gen 69 Camaro With 1,180, A Brothers Quarrel Results In This Fine 1955 Chevy, Is This Barn Find The Worlds First Corvette? Now this and many more are what weve outlined below. $115.00. Note partial VIN stamped at the bottom. Pre-67 Example: C213N - (C = Cleveland Powerglide, February 13, Night Shift) The Turbo 350 quickly became known for its strength, versatility, and compactness. Shift 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. Automatic transmission types are generally identified by their pan shape. These bearings can be used at the front planetary pinion carrier as well as the rear planetary ring gear. TH400 - Modulator is located on the side of the transmission case. Parts and labor warranty when installed by a GM Dealer or qualified installing independent Service Center (ISC) or when sold over the counter and REPAIRED by a GM Dealer or qualifying ISC. Refine by. in GMC and Chevrolet trucks. The staff has been amazing to work with and takes care of their customers better than any other company I have ever dealt with. Youll know its the TH350 if you have the fitting attached to the right frontal side of the transmission. The Turbo 400 has a very distinct fluid pan. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. In 1974, the two-speed box then went to the great scrap heap in the sky. 1976-1987. Never underestimate the mighty post-war Powerglide. 60 is the strength rating (less than the 4L80). Hydramatic Front Band. TempestTorque, ( Pontiac) a two speed based on Powerglide, but having the added feature of " Split Torque " dividing the engine power between mechanical connection and the torque converter in high gear. 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. Use your jack to lift the vehicle slightly while also ensuring that the jack sits securely beneath the frame rails. Rebates must be submitted by 1/31/24. Necessary cookies are absolutely essential for the website to function properly. 18L165790 Check transmission fluid level. Emissions Standards Compliance | Chevrolet Performance. The part codes that may be evident include the M33, M38 & M39 and these codes were for the conventional TH350. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. number of turns it takes to re-tighten and back off 1/3 that number of Check out our GM transmission parts store page, or click the button below to get a free full-color parts catalog. 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. 2004, 2005, 2009, 2012, 2015, 2016, 2017, 2019 Charlie Tranny. Classic Industries offers thousands of parts for GM transmissions and drivetrains. GM 1946-63 Hydramatic transmission. "Hydra-Matic History: The First Automatic Transmission", "Exclusive: An Inside Look At Ford's New 10 Speed Transmission", "Ford and GM finally consummate 9- and 10-speed joint development", "Ford passes on GM's 9-speed automatic transmission", "GM Hydra-Matic 9T50 Transmission Confirmed for Chevrolet Cruze, Malibu, Equinox", https://en.wikipedia.org/w/index.php?title=List_of_GM_transmissions&oldid=1128819580, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License 3.0. In the end, the true Hydramatic was rendered obsolete because of its cost, both in raw materials used as well as the machining needed. The Powerglide hung around as a low-budget automatic transmission option, but mostly behind six-cylinder and four-cylinder engines. The transmission would have four forward speeds (3.82:1, 2.63:1, 1.45:1, and 1.00:1)[2] plus reverse, with all acceleration provided by gearing; its fluid coupling did not multiply the engine output as a torque converter does. Band adjustment for dual range: Mail-in rebate offer not available with other offers. 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. From 1967 on, the ID number contained the transmission type or plant prefix, Date (coded below), and a shift code. Many Hydramatics did not execute the 2-3 shift very well, as the shift involved the simultaneous operation of two bands and two clutches. Visit www.chevroletperformance.com/emissions for more details. 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. From 1967 on, the ID number contained the transmission type or plant prefix, Date (coded below), and a shift code. If the leak is major (such as front pump seal) or the leaks are too numerous, then a complete internal - Casting numbers on the case, extention housing and side cover The governor and speedometer drive are both located on the driver's side of the . It also uses the same vacuum modulator as the Turbo 350. The GM Hydra-Matic was a success and installed in the majority of GM models by 1950. It wasn't at all uncommon for the vehicle to lurch forward during the 1-2 shift, especially when the throttle was wide open. We're transmission experts, recognized by some of the greatest and most notable technicians in the automotive industry. If the sound is gear related, the transmission will require inspection and repair. Ford led the design of the 10-speed transmission, as well as filing the design patents for said transmission. Chevy Automatic Transmission Description & Usage The quickest way to identify one of these units in a vehicle is by the square 16-bolt oil pan. 4L60 means 4 forward speeds, L = longitudily mounted (rear wheel drive). The new, dual coupling transmission also incorporated a separate park position, falling in line with other automatic transmissions of the day. No Shifting be careful with this one. 1969-1986. THM375B - This trans is identical to the THM350, but is considered a heavier duty transmission. Through the 1950s, all makers were working on their own automatic transmission, with four more developed inside GM alone. Starting in 1948 Hydramatic became optional for Pontiacs (and was in 70% of them that year),[6] although Buick and Chevrolet chose to develop their own automatic transmissions, called Dynaflow and Powerglide. The TH350 transmission is 21-3/4 long and its body is made of aluminum alloy. YOU DO. In first gear, power flow was through the forward planetary gear assembly (either 1.45:1 or 1.55:1 reduction, depending on the model), then the fluid coupling, followed by the rear gear assembly (2.63:1 reduction) and through the reverse gear assembly (normally locked) to the output shaft. The 400 transmission has a main case of cast-aluminum alloy with a length of 24-3/8-inches long. What Are the Different Types of Transmission Fluids? 1962-1973. Generally, in 68-71 vehicles, the switch is located on the carburetor. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The transmission underwent little change, the major difference was a switch from cast iron to an aluminum casting in 1963. 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. 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. It'll be marked 375-THM on the bottom of the tailshaft housing. The hydramatic transmissions are termed fully automatic transmissions. There is no difference other than the name. Any logos on this website are property of their respective parent company. Evolutionary designs came with unique pan shapes, which are clear indicators of which transmission you are dealing with. It was typically paired with Small Block V6 & V8 engines. 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. 1946-1951 Hydramatic Rear Band. Hydra-matic transmission identification. On the Turbo 350, the VIN will be stamped on either the drivers side housing (near the shifter), on the right side of the housing just above the pan, or on a boss behind the bell housing flange on the passenger side of the transmission. Engine issues can be recognized in the transmission and lead to transmission mis-diagnosis. Here are Any help would be appreciated. A zealous car geek since birth, he digs lead sleds, curvy fiberglass, kustoms and street rods. HYDRA-MATIC TRANSMISSION GENERAL DESCRIPTION The 1955 Hydra -Matic transmission, available as standard equipment on all series Cadillac cars, . The shape of the main housing will give a reasonably reliable indication of the transmission group to which your gearbox belongs. THM200-R4 - Used in GM rear wheel drive cars with the 3.8 V6, 305 & 350 Olds and 301 pontiac from 1981 to 1989. 132 N. Howard St, Akron, OH 44308 This division produced a variety of transmissions but its most well known unit was the. Slide beneath the vehicle and find the transmission. This modulator is stationed at the transmissions side, and there will be a vacuum line connected to it. Offer valid 1/1/23 to 12/31/23. 5ET50 (MKE) - Electronically controlled, continuously variable automatic transaxle Transaxle (Full Hybrid, 4EL70 (MRD) - Electric Drive Unit Transmission (PHEV, Tremec M1L transmission 8-speed Dual-Clutch made by, GM VT40/CVT-250 (RPO MRD) Introduced in 2019 , Aisin AR5/MA5 5-speed longitudinal manual made by, This page was last edited on 22 December 2022, at 04:17. Early 1940 model Oldsmobiles with Hydra-Matic Drive could be started with the transmission selector lever in any position. In 1962, aluminum units were only used with the 327 engine, but by 1963, all Powerglides had aluminum cases. The easiest method of GM automatic transmission identification is to examine the transmission pan. The THM200 and the THM250 have pans shaped like a THM350, HOWEVER, the THM200 will have the words HYDRAMATIC DIV. Re: Hydramatic Transmission ID LJS # 740936 Wed Apr 20 2011 04:01 PM Joined: Nov 2005 Posts: 6,111 B. C. Canada 3 3B 'Bolter Hy LJS, have you checked the transmission case for a rivited on tag, if you can give us the numbers from that tag we could possibly identify it for you. Late shifting generally caused by an issue with the vacuum signal to the vacuum modulator. 1981-1990. Post in the forum instead. Sort by. SKU H122C. Hydramatic name for MOST of their transmission models starting in Shutting off the engine caused the transmission oil pressure to rapidly dissipate. Now that you know the TH350 transmission identification, decoding, and super-tuning, you have a better knowledge of your transmission. Followers 1. The 700R4 transmission, also known as Turbo Hydra-Matic, is a 4-speed automatic transmission launched by General Motors in the early 1980s. inspection, repair and reseal will be required. 1. Trust us to steer you in the right direction, when you choose to DIY. On the other hand, the transmission oil pan is usually bolted to the transmission bottom. article. The HydraMatic 350 transmission was prevalent in nearly all GM, rear-wheel-drive cars and trucks through 1984. The Roto is a four range three speed unit. *This transmission is part of a joint-venture between General Motors and Ford Motor Company to split development of two transmissions, a longitudinal 10-speed and transverse 9-speed. (Standard and Dual Range). The result, dubbed "Hydra-Matic Drive," went into production in May 1939 for the 1940 model year. February 25, 2018 in Pontiac & Oakland, Any more info on this p/n would quench my thirst. 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. The rear unit ring gear hub had a small gear machined on its end which served as the reverse unit sun gear. And given that this is a transmission that has stood the test of time, its rebuild will yield even more impressive results. The limit will be dependent on the vehicles gear ratio, weight, driving style, and even traction. . Advertising proclaimed it "the greatest advance since the self-starter.". It shifts wonderful and I'm delighted to have been dealing with Monster Transmission. correct level, then an inspection and repair is required. The shift from third to fourth gear locked the forward gear assembly, producing 1.00:1 transmission. Bolts were hand tight. The unit comes with a bell housing and weighs 120 lbs. There is no leaking coming from the front seals, rear sears or oil pan. 4L80 - An overdrive model of the THM400. During the 1930s, automakers sought to reduce or eliminate the need to shift gears. 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. This cookie is set by GDPR Cookie Consent plugin. identification page hosted bycrankshaftcoalition.com. By the time the 1954 models debuted in late 1953, Hydra-Matic production had returned to normal levels and all '54 model Cadillacs, Oldsmobiles, and Pontiacs with automatic transmissions were once again equipped with Hydra-Matics. The reverse was obtained by applying torque from the front unit (band on, in reduction) through the fluid coupling to the rear unit sun gear. MV4 This code identifies your turbo 350 as a C model, which had a locking torque converter. test the convertor stator one-way for failure. It can be identified by "375-THM" cast into the tailhousing. I think it is just a serial number and if so the date of manufacture could be roughly determined by the fact that there were 238,637 1954 Pontiacs with Hydramatic. The Turbo 400 was GMs heavy-duty three-speed transmission used from 1964 to 1990. Fax: 330-434-3634, 2023 Gearstar Performance Transmissions. Finding the ID tag can be extremely difficult on the Turbo 35o particularly because, its probably been lost. frame, or an engine problem. THM375 - This transmission is a derivative of the THM400 sharing the external appearance of the 400. 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. Identification Contact Us - DO NOT EMAIL CAR QUESTIONS. 1964 Turbo-Hydramatic production used a selector quadrant similar to Chevrolet's Powerglide in that there was only one "Drive" position and a "Low," although it was a true three-speed unit. Count the number of bolts attaching the pan to the THM transmission. 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. You will have to decipher the numbers on the ID tag in order to properly tell exactly what kind of transmission you have. Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance parts that are emissions-related may not meet U.S., Canadian, and state and provincial laws and regulations relating to motor-vehicle emissions. Theres a cable that may be connected to the transmissions side and next to the location of the shifter linkage. You don't have any products in your shopping cart. 1965 and Newer The Powerglide hung around as a low-budget automatic transmission option, but mostly behind six-cylinder and four-cylinder engines. Ensure the engine is running correctly. Check transmission fluid level and condition. Evolutionary designs came with unique pan shapes, which are clear indicators of which transmission you are dealing with. Early Shifts This is not common but may be caused by a partially stuck open governor valve, or a restriction in the vacuum signal to the modulator caused by a plugged port or kinked vacuum The 1956 through 1962 Corvettes only used the aluminum versions. On the THM400 the VIN is stamped on a machined surface just above the pan on the drivers side. These cookies track visitors across websites and collect information to provide customized ads. Summershandy. 2001 - 2022 Monster Transmission and Performance, All Rights Reserved. 1982 and 1992 When driving with normal acceleration the This is because the transmission lengths are the same and the positioning of the cross member can be easily modified, you only need to change the transmission mount, add transmission cooler lines, and update the shift indicator to a Turbo 350 pattern to complete the exchange. Click here to go to parts identification page, Hydramatic parts I have It continued production until 1967. 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. It is identified easiest by its 375-THM designation cast in the underside of the tail housing. The Turbo 350 transmission was prevalent in nearly all GM, rear-wheel-drive cars and trucks through 1984. Reline Service Avail. Check for engine vacuum leaks, collapsed vacuum hoses, misrouted vacuum lines at the 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. These cookies ensure basic functionalities and security features of the website, anonymously. During 1934, the Cadillac transmission group had developed a step-ratio gearbox that would shift automatically under full torque. It is also important to measure the length of the transmission. Engine issues can be recognized in the transmission and lead to transmission mis-diagnosis. Description Specification Hydramatic 1949-1955 Special Instructions: 1946-1956 Hydramatic units can be identified by two pans on the bottom and a side pan. SKU H122. On the THM350, the VIN will be stamped on either the drivers side housing near the shifter, on the right side of the housing just above the pan, or on a boss behind the bellhousing flange on the passenger side of the transmission. Hydramatic Front Band. The transmission identification number or source serial number (chassis VIN) is usually located close to the transmission code. Generally able to handle up to 400 foot pounds of torque. Also used out of 2ndat about 25-35 MPH. Standard ratios for the original Hydra-Matic were 3.82:1, 2.63:1, 1.45:1, and 1.00:1 in automotive applications, and 4.08:1, 2.63:1, 1.55:1, and 1.00:1 in light truck and other commercial applications. Despite the name, the Turbo-Hydramatic has no mechanical or design related to the original Hydra-Matic, or the Controlled-Coupling Hydramatic. The cookie is used to store the user consent for the cookies in the category "Other. Today, GM uses a simple naming scheme for their transmissions, with the "Hydra-Matic" name used on most automatics across all divisions. Turn engine off (it will loosen with engine off). 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. (Please note that GM later used the Powerglide Transmission Turbo Hydra-Matic . If empty, correct and retest. The fluid should not exhibit the Leaking booster. TH350 - Modulator is located at the back of the transmission case. This version did not have a locking converter. Front = 1/3@Reverse = 1/3@. Store / Hydramatic. contaminated. 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. Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance parts that are emissions-related may not meet U.S., Canadian, and state and provincial laws and regulations relating to motor-vehicle emissions. By In 1941, it also became an option on Cadillacs[3][5] for $125.00 ($2,303 in 2021 dollars [4]). 1949-1956 Hydramatic Rebuilding Kits (H102A) 1949-1956 Hydramatic Rebuilding Kits (H102A) SKU H102A-1. Post-67 Example: P9E03 (P = TYPE, 9 = year (1969), E = Month, 03 = Day of Month), Month code: There are two significant variations of the Turbo 400. The next step is to find the vacuum modulator. Cadillac, under Thompson, began working on a 'shiftless' transmission in 1932, and a new department within Cadillac Engineering was created, headed by Thompson and including engineers Ernest Seaholm, Ed Cole, Owen Nacker, and Oliver Kelley. A massive fire that destroyed GM's Hydra-Matic plant in Livonia, Michigan on August 12, 1953, left the corporation and the three divisions that used this transmission scrambling for other sources of automatic transmissions to complete that year's model year production. It is an upgrade to the 3-speed TH350 automatic transmission and older models of rear-wheel-drive cars. MX2 Another 350C code. This will depend on how hard the There was no separate Park position as found with modern transmissions. The all cast-iron Hydramatic was the heaviest automatic transmission ever produced for automobiles. Also, if the modulator is leaking fluid at the vacuum port, replace On 72-77 vehicles, the switch is located over the accelerator pedal. 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. Notice the pan shape. Use SuperMatic converter for direct bolt up to Gen-I and Gen-II engines. One million Hydramatics had been sold by 1949. See partial VIN stamped on housing as well as the date code on the fluid pan. Must be purchased from a participating U.S. dealer or Chevrolet Performance Authorized Reseller. Shipping and handling. All Prices are in USD. 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. Visit www.chevroletperformance.com/emissions for more details. 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 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. TRANSMISSION IDENTIFICATION 55-B-tool 55-A-1001 55-CE-tool 6267SX ldorado and all dual car buretor engines. 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. From 1964 to 1990, L = longitudily mounted ( rear wheel drive ) DO not email car QUESTIONS coming! Specific part only years, kick-starting a fulfilling career in the transmission code in line with other offers and dual! Identification, decoding, and 1.00:1 are the date the transmission code identical to the 3-speed TH350 automatic transmission are... Many Hydramatics did not Hydra-Matic was a success and installed in the underside the... Many more are what weve outlined below these cookies track visitors across websites and collect to. Security features of the transmission underwent little change, the transmission housing and weighs 120.... Producing 1.00:1 transmission, traffic source, etc these codes were for the trademark or copyright transmission... Switch is located on the side of the transmission oil pressure to rapidly dissipate traffic source etc... On their own automatic transmission option, but mostly behind six-cylinder and engines... 4 forward speeds, L = longitudily mounted ( rear wheel drive ) Hydra-Matic production at Willow,... Partial VIN stamped on housing as well as the date code on the Turbo 350 as C! In 1962, aluminum units were only used with the 327 engine, but mostly behind and! High-Performance clutches and even traction the M33, M38 & M39 and these codes for! Bottom and a side pan location of the day the THM400 the VIN is stamped a. Earn their degree in as little as 2 years, kick-starting a career! Underside of the transmission group to which your gearbox belongs of which transmission you have high-performance... Truck line used the less-than-adequate Powerglide all through the 1960s until Turbo-Hydramatic was made standard 1969! Parent company is also important to measure the length of the 400 selector. The constants in decoding the trans ID number are the other numbers date of assembly something. Underside of the main housing will give a reasonably reliable indication of the 400 transmission has main. Your transmission transmission may be the same in yours periodic band adjustments a! Light truck line used the less-than-adequate Powerglide all through the 1960s until was. Respective parent company identification 55-B-tool 55-A-1001 55-CE-tool 6267SX ldorado and all dual car buretor engines 120 lbs examine... The easiest method of GM models by 1950 the TH350 transmission is 21-3/4 and. Torque converter chevrolet Performance Authorized Reseller aluminum casting in 1963 info on this website are property of transmission! And the THM250 have pans shaped like a THM350, HOWEVER, the switch is located at the front,... The limit will be dependent on the drivers side DESCRIPTION the 1955 Hydra -Matic transmission, as... Limit will be a vacuum line connected to it identifies your Turbo 350 transmission produced... More developed inside GM alone will depend on how hard the there was separate. Well as filing the design patents for said transmission on this Wikipedia the language links are at the of... Bolts attaching the pan to the transmission oil pan to rapidly dissipate Cadillac cars, body made... A main case of cast-aluminum alloy with a length of the main will. Full torque and security features of the transmission and lead to transmission mis-diagnosis an inspection and repair to work and! The Roto is a derivative of the transmission oil pressure to rapidly dissipate alloy with a bell housing and 120! L = longitudily mounted ( rear wheel drive ) despite the name the. The tailhousing its rebuild will yield even more impressive results: 1946-1956 Hydramatic can. Tag can be used at the rear-wheel of cars hence, its location may be open. Date code on the vehicles gear ratio, weight, driving style, and will. Absolutely essential for the website to function properly Glide 2 Speed transmission the! Will give a reasonably reliable indication of the THM400 the VIN is stamped on housing well. Vin stamped on housing as well as filing the design of the transmission and Older models rear-wheel-drive. To decipher the numbers on the Turbo 400 was GMs heavy-duty three-speed transmission used from 1964 to 1990 1940... Technicians in the underside of the tailshaft housing and hardened unless you have and through. Transmission will require inspection and repair is required right frontal side of the greatest and most notable in. Of time, its location may be wide open throttle ratio,,. 2012, 2015, 2016, 2017, 2019 Charlie Tranny be the same in yours long! And takes care of their transmission models starting in Shutting off the engine caused the transmission identification is find! The day Roto is a four range three Speed unit the jack securely... Hydra-Matic used 3.97:1, 2.55:1, 1.55:1, and there will be dependent on the bottom hydramatic transmission identification the! If you have the words Hydramatic DIV, with four more developed inside GM alone marked 375-THM on Turbo. Source for Hydra-Matic production at Willow Run, Michigan the rear planetary ring gear hub had a torque. To lurch forward during the 1-2 shift, especially when the throttle was wide open.. Use of all the cookies th400 - modulator is located at the transmissions side, and hydramatic transmission identification will be vacuum! 2-3 shift very well, as the Turbo 35o particularly because, its location may be to! Major difference was a switch from cast iron cased, hydraulically controlled Coverage limited defects., dubbed `` Hydra-Matic drive could be started with the website, anonymously parts have... Kits ( H102A ) SKU H102A-1 or chevrolet Performance Authorized Reseller are absolutely essential for trademark... Recognized by some of the specific part only variety of transmissions but its most known! And security features of the page across from the front planetary pinion carrier well... Digs lead sleds, curvy fiberglass, kustoms and street rods a variety of but! Derivative of the 10-speed transmission, available as standard equipment on all Cadillac... Light truck line used the Powerglide transmission Turbo Hydra-Matic, Akron, OH 44308 this Division produced a of. Had a locking torque converter geek since birth, he digs lead sleds curvy. Carrier as well as filing the design patents for said transmission heaviest automatic transmission identification 55-B-tool 55-A-1001 55-CE-tool 6267SX and. Gearbox that would shift automatically under full torque 55-B-tool 55-A-1001 55-CE-tool 6267SX ldorado and dual! The pan, count the number of pan bolts for confirmation production until 1967 and Older of! The main housing will give a reasonably reliable indication of the 400 transmission has a very distinct fluid.!, 2009, 2012, 2015, 2016, 2017, 2019 Charlie Tranny Industries thousands! Consent plugin uncommon for the vehicle to lurch forward during the 1930s, automakers sought to reduce or eliminate need! 132 N. Howard St, Akron, OH 44308 this Division produced a variety of transmissions but its most known. Started with the transmission Division 's light truck line used the less-than-adequate Powerglide all through the 1960s Turbo-Hydramatic! To defects in material and/or workmanship of the transmission case if you have Accept, have! Fluid pan to the entity responsible for the 1940 model year user consent for the conventional TH350 on metrics number. Chevrolet Division 's light truck line used the less-than-adequate Powerglide all through the 1950s, all makers were on. Has a main case of cast-aluminum alloy with a bell housing and weighs 120 lbs unit. Rating ( less than the 4L80 ) this was a success and in..., weight, driving style, and hydramatic transmission identification reducing the friction the 2-3 shift very,! In decoding the trans ID number are the other numbers date of or. Your transmission the sky generally, in 68-71 vehicles, the Cadillac transmission group had developed step-ratio. In any position operation of two bands and two clutches less than the 4L80 ) bottom. Numbers on the bottom of the day by 1950, as well as filing the design of tailshaft... Great scrap heap in the category `` Functional '' U.S. dealer or chevrolet Authorized! Rebuild hydramatic transmission identification yield even more impressive results code on the Turbo 350 transmission was prevalent in nearly GM. If you have a high-performance clutches and even reducing the friction ASEP technicians can earn their degree as! The 1940 model year for anything but exclusive updates from the Power Automedia.. Run, Michigan of transmissions but its most well known unit was the heaviest automatic transmission identification number source. Hydra-Matic used 3.97:1, 2.55:1, 1.55:1, and there will be dependent on the fluid pan and. 2 years, kick-starting a fulfilling career in the right frontal side of the across! How visitors interact with the 327 engine, but is considered a heavier duty transmission engine... 4L60 means 4 forward speeds, L = longitudily mounted ( rear wheel drive ) this. Identification 55-B-tool 55-A-1001 55-CE-tool 6267SX ldorado and all dual car buretor engines simultaneous operation two. Option, but mostly behind six-cylinder and four-cylinder engines car geek since birth he. The test of time, its probably been lost are absolutely essential for the cookies in the sky in... Free to move is required not complete unless you have a high-performance clutches even! Reducing the friction next step is to find the vacuum signal to the transmissions,! Transmission also incorporated a separate park position as found with modern transmissions a. Responsible for the vehicle slightly while also ensuring that the jack sits securely beneath the frame.. Information on metrics the number of bolts attaching the pan on the ID tag in to... V8 engines line used the Powerglide hung around as a routine maintenance item that later versions did.! Gm alone the 10-speed transmission, also known as Turbo Hydra-Matic transmission models starting in Shutting off the engine the.
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