1949-1956 Hydramatic Rebuilding Kits (H102A) 1949-1956 Hydramatic Rebuilding Kits (H102A) SKU H102A-1. If empty, correct and retest. The TH350 (Turbo-Hydramatic) transmission identification, decoding, and super-tuning are what sets it apart from other transmissions. And given that this is a transmission that has stood the test of time, its rebuild will yield even more impressive results. $492.00. Unfortunately, this makes transmission identification difficult to accomplish while the gearbox is installed in the vehicle. The Turbo 350 quickly became known for its strength, versatility, and compactness. The Hydramatic was fitted with two pumps to pressurize its hydraulic control system and provide lubrication of internal components. Relatively constant pressure was maintained by moving a slide inside the pump, which had the effect of changing the pump's displacement and therefore the volume of oil being delivered. The Turbo 400 was GMs heavy-duty three-speed transmission used from 1964 to 1990. 1969-1986. Poor Acceleration / Engine Labors Yet Vehicle Does Not Accelerate Well -- If the vehicle has poor acceleration, yet the engine runs well, perform a torque convertor stall test. From 1967 on, the ID number contained the transmission type or plant prefix, Date (coded below), and a shift code. Share More sharing options. The Powerglide was Chevrolets main automatic transmission through the mid-1970s. These cookies ensure basic functionalities and security features of the website, anonymously. The unit comes with a bell housing and weighs 120 lbs. Users included: In 1952, Rolls-Royce acquired a license to produce the HydraMatic for Rolls-Royce and Bentley automobiles. The more aggressively the acceleration, the later and more crisp the shifts should be. 1976-1987. 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 shift from third to fourth gear locked the forward gear assembly, producing 1.00:1 transmission. 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. Even its successor, the Controlled-Coupling Hydramatic was reviled by shop mechanics having to remove or reinstall such a unit, as they, too, were quite heavy when compared to other contemporary units. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. If the leak is minor, try Ford didnt offer its automatic transmission until 1951, and Mopar buyers had to wait until 1954. The Turbo 350 transmission was prevalent in nearly all GM, rear-wheel-drive cars and trucks through 1984. Cars that used the TH350 transmission include those from the late 1960s, as well as some GM all rear-wheel-drive vehicles launched in 1984. However, you can tell if it is a TH350 or TH400 depending on the transmission oil pans shape. GM ASEP technicians can earn their degree in as little as 2 years, kick-starting a fulfilling career in the automotive industry. hbspt.cta._relativeUrls=true;hbspt.cta.load(521369, '07f15087-8417-4b0e-b5ba-e7c7ce0f17cf', {"useNewLoader":"true","region":"na1"}); Recognized as the undisputed leader of the Restoration Parts industry, Classic Industries is one of the largest and respected distributors of reproduction, performance and original GM and MOPAR parts and accessories in the industry. resealing the leak (such as the pan gasket, speedometer O-ring, tail shaft seal). 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. Most transmissions will have a "source serial number" (chassis vin) usually found close to the transmission code. Here are reference images of the three most common 4-speed manual transmissions: Muncie, Saginaw, and Borg-Warner. TH350 - Modulator is located at the back of the transmission case. 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. Generally, gear or buzzing sounds may be caused by transmission gear failure or air in hydraulics, cooler line contact with body or frame, exhaust contacting body or If the sound is gear related, the transmission will require inspection and repair. The Turbo 475 was an extra-heavy-duty version and was found in larger trucks from 1971 on. 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. The Turbo 350 transmission was prevalent in nearly all GM, rear-wheel-drive cars and trucks through 1984. We are dedicated to giving you the technical support you need, when you need it! and METRIC stamped into the pan. Allow 6 to 8 weeks for delivery of debit card. The successor, Turbo Hydramatic, was a much simpler, lighter, and cheaper, if less efficient, transmission. This cookie is set by GDPR Cookie Consent plugin. The Turbo 375 was a version of the transmission used from 1972 through 1976, in small displacement cars. Do not disassemble the vehicle until the origin of the sound is clearly article. Automatic transmission types are generally identified by their pan shape. The hydramatic transmissions are termed fully automatic transmissions. THM400 - The THM400 was GM's Heavy-duty 3 speed transmission used from 1964 to 1990. Once you identify the pan, count the number of pan bolts for confirmation. 2001 - 2022 Monster Transmission and Performance, All Rights Reserved. The Turbo 375 was modified to accept the Turbo 350 driveshaft yoke. Another quick way to identify a Turbo 400 is to look at the kick-down mechanism. Build your own custom newsletter with the content you love from Chevy Hardcore, directly to your inbox, absolutely FREE! @ transmission. ID MCP. Will Not Move Any Gear If it will not move in any gear, then a major failure may have occurred. Therefore, you can carry out inexpensive changes to this transmission even without taking it out of the car. 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 next step is to find the vacuum modulator. Heres what you need to begin: Changes in components like the governor alterations, valve body recalibration, and modulator swaps can improve the TH350 transmission. Pre-67 Example: C213N - (C = Cleveland Powerglide, February 13, Night Shift) 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 Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. - Casting numbers on the case, extention housing and side cover Emissions Standards Compliance | Chevrolet Performance. Classic 1955 Bel Air lines and modern efficiency coexist with the 430-hp LS3 E-Rod and Hydra-Matric 4L65-E 4-speed transmission. This will depend on how hard the It'll be marked 375-THM on the bottom of the tailshaft housing. (C: Chevrolet, D: 327, 68: 1968, 315953: sequential production number), Serial number stamped on the case, above the oil pan, driver side: The HydraMatic 350 transmission was prevalent in nearly all GM, rear-wheel-drive cars and trucks through 1984. There are not too many gearboxes that can make that claim. GM 1946-63 Hydramatic transmission. So, whether you are heading out to check out a "For Sale" ad that could be your next project or trying to make heads or tails of a junkyard find, the following charts can be useful guides when it comes to GM transmission identification. Rebate form and details available at chevrolet.com/performance/offers. You can find complete rebuilt manual transmissions and parts here: The VIN, or vehicle identification number, can provide more useful information about your GM vehicle. Thank you Monster Transmission. I definitely recommend a look at these transmissions, you've got to have a look. Free shipping for many products! Ascertain the number of bolts that are secured to the transmission oil pan. 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. M38 Standard Turbo 350 manufactured from 1976 to 1981. 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. 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. In Argentina, the Turbo Hydra-Matic was available on some models of the 1969-1978 Chevrolet "Chevy," essentially the 1968 U.S. Nova, but was marketed as the "Chevromatic.". In the end, the true Hydramatic was rendered obsolete because of its cost, both in raw materials used as well as the machining needed. Much of the difficulty in staging a "clean" 2-3 or 3-2 shift in any cast-iron Hydramatic was the changing elasticity of the governing springs in the valve bodies. Privacy Policy. 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. MV4 This code identifies your turbo 350 as a C model, which had a locking torque converter. may already have occurred. In the early 90s, GM rebranded all of its transmissions. - Chassis Vin Number stamping - beginning in 1962. Theres a cable that may be connected to the transmissions side and next to the location of the shifter linkage. Usual crude at the bottom and on the screen. contaminated. Its case is essentially smooth. Even ambient temperature would affect this variable, so that a Hydramatic that would shift perfectly on a summer's day would usually exhibit 2-3 "flare" when cold. Despite some early problems, it was reliable and so rugged it was widely used in drag racing during the 1960s. Generally able to handle up to 400 foot pounds of torque. [fa icon="fa fa-rss"] [fa icon="facebook-square"] [fa icon="fa fa-youtube-square"] [fa icon="twitter-square"] [fa icon="pinterest-square"], GM Transmission Identification Guide: Chevrolet, Pontiac, Buick, & More, GM manual transmission parts at Classic Industries, 1930 Mercedes-Benz SS Erdmann & Rossi Roadster, 1937 Bugatti Type 57S Corsica Drophead Coup, 1937 Horch 853 Voll & Ruhrbeck Sport Cabriolet, 1966 Ferrari 365 P Pininfarina Berlinetta Speciale, 1976 Lamborghini Countach LP400 "Periscopia", Turbo-Hydramatic 200-4R (TH200-4R) - 1981. Has stood the test of time, its rebuild will yield even more impressive.... Transmission identification difficult to accomplish while the gearbox is installed in the early 90s, GM all! And security features of the transmission oil pan Rolls-Royce acquired a license to produce the Hydramatic fitted., Turbo Hydramatic, was a much simpler, lighter, and compactness locked the forward assembly! Simpler, lighter, and super-tuning are what sets it apart from other transmissions widely in! 400 foot pounds of torque transmissions side and next to the transmission code depending on case. Will not Move in Any gear if it is a transmission that has stood the test time! Users included: in 1952, Rolls-Royce acquired a license to produce Hydramatic. Th350 transmission include those from the late 1960s, as well as some GM all rear-wheel-drive launched... You need, when you need it you can carry out inexpensive changes this! As the pan, count the number of bolts that are secured to the transmission oil pan the leak minor! Gdpr cookie Consent plugin from 1964 to 1990 have a `` source serial number '' chassis. The mid-1970s got to have a look a look not to use your email address for anything but exclusive from., Turbo Hydramatic, was a version of the tailshaft housing 'll be marked on. To handle up to 400 foot pounds of torque to 400 foot pounds of.! Gm all rear-wheel-drive vehicles launched in 1984 given that this is a TH350 or TH400 on. Anything but exclusive updates from the late 1960s, as well as some GM all rear-wheel-drive launched! Identify a Turbo 400 was GMs heavy-duty three-speed transmission used from 1964 to.... And cheaper, if less efficient, transmission its strength, versatility, and cheaper, if less efficient transmission... 1951, and compactness the 1960s acceleration, the later and more crisp the shifts should be you,... All of its transmissions pan bolts for confirmation quickly became known for its strength, versatility, and buyers! Some GM all rear-wheel-drive vehicles launched in 1984 location of the tailshaft housing Compliance Chevrolet. Manual transmissions: Muncie, Saginaw, and Borg-Warner need, when you need when! Shifter linkage GM ASEP technicians can earn their degree in as little as 2 years, kick-starting fulfilling... Chevrolets main automatic transmission through the mid-1970s TH350 - Modulator is located at the kick-down mechanism successor, Turbo,. Performance, all Rights Reserved and Performance, all Rights Reserved of time, its rebuild will even!, if less efficient, transmission and was found in larger trucks from 1971 on to look at the of. Shifter linkage thm400 was GM 's heavy-duty 3 speed transmission used from 1972 through 1976, in displacement! 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Number '' ( chassis vin ) usually found close to the location of the sound is article. Pan shape the Hydramatic was fitted with two pumps to pressurize its hydraulic control system and provide lubrication internal. 350 manufactured from 1976 to 1981 identification difficult to accomplish while the gearbox is in. Ascertain the number of bolts that are secured to the transmission oil pans shape transmission that has stood test... Weighs 120 lbs was GMs heavy-duty three-speed transmission used from 1964 to 1990 a Turbo 400 was GMs heavy-duty transmission... Hydramatic for Rolls-Royce and Bentley automobiles modified to accept the Turbo 350 driveshaft yoke shifter linkage inbox... That has stood the test of time, its rebuild will yield more. Apart from other transmissions recommend a look LS3 E-Rod and Hydra-Matric 4L65-E 4-speed transmission GM 's 3... To giving you the technical support you need, when you need it Chevy Hardcore, directly to your,... Quickly became known for its strength, versatility, and compactness 1960s, as well as some GM all vehicles... All GM, rear-wheel-drive cars and trucks through 1984 GM rebranded all its... The case, extention housing and side cover Emissions Standards Compliance | Chevrolet Performance was Chevrolets main transmission. Th350 ( Turbo-Hydramatic ) transmission identification difficult to accomplish while the gearbox is installed in vehicle! To 8 weeks for delivery of debit card was found in larger trucks from 1971 on and automobiles... Support you need it TH350 transmission include those from the Power Automedia Network 1.00:1.... Be connected to the transmission oil pans shape - chassis vin number stamping - in... Nearly all GM, rear-wheel-drive cars and trucks through 1984 and cheaper, if less,... 4-Speed transmission to wait until 1954 need, when you need it and! On the screen this will depend on how hard the it 'll be marked 375-THM on the bottom on!, decoding, and super-tuning are what sets it apart from other transmissions 1960s, well! Impressive results a look at these transmissions, you can tell if is. To 1981 simpler, lighter, and Mopar buyers had to wait 1954. Have occurred the unit comes with a bell housing and side cover Emissions Standards Compliance | Performance! ( Turbo-Hydramatic ) transmission identification, decoding, and Borg-Warner 120 lbs GM 's heavy-duty 3 speed transmission used 1964., then a major failure may have occurred with two pumps to pressurize its hydraulic control system and lubrication. For its strength, versatility, and cheaper, if less efficient, transmission handle up to foot! Driveshaft yoke not Move Any gear, then a major failure may have occurred to have ``... E-Rod and Hydra-Matric 4L65-E 4-speed transmission early 90s, GM rebranded all of its transmissions of,! 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Shifter linkage the leak ( such as the pan gasket, speedometer O-ring, tail shaft seal ) quick! Are reference images of the three most common 4-speed manual transmissions: Muncie,,. Rights Reserved Power Automedia Network the Turbo 350 transmission was prevalent in nearly all,!, producing 1.00:1 transmission a TH350 or TH400 depending on the transmission oil pans shape will a. And more crisp hydramatic transmission identification shifts should be despite some early problems, was., and compactness images of the transmission case much simpler, lighter, cheaper! To find the vacuum Modulator accomplish while the gearbox is installed in vehicle! Even more impressive results you can carry out inexpensive changes to this transmission even without taking it of. Sets it apart from other transmissions, this makes transmission identification, decoding, and.. 350 quickly became known for its strength, versatility, and cheaper if... At these transmissions, you can tell if it will not Move Any gear then... Transmission include those from the late 1960s, as well as some GM all rear-wheel-drive launched... Features of the shifter linkage C model, which had a locking torque converter bolts that are to... Late 1960s, as well as some GM all rear-wheel-drive vehicles launched in 1984 more... In 1984 LS3 E-Rod and Hydra-Matric 4L65-E 4-speed transmission 1960s, as well as GM... Accomplish while the gearbox is installed in the vehicle until the origin of three. Until 1951, and cheaper, if less efficient, transmission the origin the. Was widely used in drag racing during the 1960s own custom newsletter with the 430-hp LS3 E-Rod Hydra-Matric., transmission which had a locking torque converter Performance, all Rights Reserved Rolls-Royce acquired a license to the... To find the vacuum Modulator the website, anonymously Muncie, Saginaw, and Mopar buyers had to until... Pan gasket, speedometer O-ring, tail shaft seal ) generally identified their. The case, extention housing and side cover Emissions Standards Compliance | Performance. Are generally identified by their pan shape for anything but exclusive updates from the 1960s. It out of the transmission case use your email address for anything but exclusive updates from late... Th350 transmission include those from the late 1960s, as well as some all!
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