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. Summershandy. The source serial number is from the CAR the transmission originally went into, NOT the assembly plant. This will depend on how hard the 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. Due to the manner in which the rear gear assembly was arranged, the coupling went from handling 100 percent of the engine torque to about 40 percent, with the balance being handled solely by the gear train. Copyright 2023, Antique Automobile Club of America. Transmission fluid that has come from an overheated transmission isn't generally red; it will appear dark brown or black as a result of being exposed to high temperatures. @ 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. The limit will be dependent on the vehicles gear ratio, weight, driving style, and even traction. following: Transmission shifting should be smooth and exhibit normal application (no delays, abrupt engagement, drag, or slide). Members; 834 Share; Posted February 25, 2018. The cookie settings on this website are set to 'allow all cookies' to give you the very best experience. Youll not only need to hunt for, and hopefully find the tag, but it needs to be free of enough gunk to be legible. Used 1939-63 in various Olds, It is identified easiest by its 375-THM designation cast in the underside of the tail housing. Thank you Monster Transmission. The constants in decoding the transmission ID number are the date the transmission was produced. 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. 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 division produced a variety of transmissions but its most well known unit was the. $250 rebate on the purchase of a Chevrolet Performance Transmission within 180 days of the purchase of any Chevrolet Performance CrateEngine, $250 rebate on the purchase of a Chevrolet Performance Transmission within 180 days of the purchase of any Chevrolet Performance Crate Engine. Valve actuated transmission is currently in use. From 1939-1950, the reverse anchor was used to lock the reverse unit ring gear from turning by engaging external teeth machined into that ring gear. At higher speeds, the rear pump provided all the oil volume that was needed to operate the transmission and the front pump's slide was nearly centered, causing that pump to produce little output. However, you can tell if it is a TH350 or TH400 depending on the transmission oil pans shape. These transmissions mate a three-element turbine torque converter to a Simpson planetary geartrain, providing three forward speeds plus reverse. having no park position and a quadrant of N-D4-D3-L-R and. 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. inspection, repair and reseal will be required. In this case, you are to ascertain if the cable is connected to the engine. (Please note that GM later used the This will 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. 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 click Accept Cookies to continue to use the site. Finding the ID tag can be extremely difficult on the Turbo 35o particularly because, its probably been lost. Use your jack to lift the vehicle slightly while also ensuring that the jack sits securely beneath the frame rails. It was phased out of use and superseded by GMs 700R4 starting in 1982. On the other hand, the TH350 was to serve as a replacement to the Powerglide transmission, which is a two-speed automatic transmission. These modifications can be made without removing the transmission from the car. Above is the transmission ID tag on a 1970 Corvette. Hydramatic (also known as Hydra-Matic) is an automatic transmission developed by both General Motors ' Cadillac and Oldsmobile divisions. One more thing you can fall back on to identify the TH350 is the stampings placed on the transmissions side. This code was used for ten years from 1976 to 1986. 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. Close this window to stay here or choose another country to see vehicles and services specific to your location. Distinguished from a Jetaway by 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. They created a standardized naming system across the product line and changed the name of the Turbo 400 to 3L80. There were many versions of this No miss firing under load, should have sufficient power, and a smooth idle in and out of gear. The 700R4 transmission, also known as Turbo Hydra-Matic, is a 4-speed automatic transmission launched . 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). It is also important to measure the length of the transmission. This website uses cookies to improve your experience while you navigate through the website. 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. Just curious and couldn't find anymore info. (1: Chevrolet, 8: 1968, L: Van Nuys, CA, 165790: last 6 digits of VIN). Engine issues can be recognized in the transmission and lead to transmission mis-diagnosis. Tighten band adjustment until it stops. Shipping and handling. There are not too many gearboxes that can make that claim. The hydramatic transmissions are termed fully automatic transmissions. 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). Therefore, you can carry out inexpensive changes to this transmission even without taking it out of the car. Advertising proclaimed it "the greatest advance since the self-starter.". Buzzing sound may be caused by cooler line routing where the line is contacting the frame or engine / Connect & Cruise Crate Powertrain Systems provide factory-matched engine-and-transmission combinations that include specially calibrated controllers and wire harnesses designed for retrofit installations in older vehicles. Usual crude at the bottom and on the screen. However, it is the TH400 if this fitting is at the transmissions front-rear side. The cookie is used to store the user consent for the cookies in the category "Analytics". Chevrolet Hydra-Matics usually said something like this CH-54-1475. Most early electronic transmissions use the "-E" designator to differentiate them from their non-electronic cousins, but this has been dropped on transmissions with no mechanical version like the new GM 6L80 transmission. 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. Hydra-Matic 4L65-E is a heavy-duty automatic transmission designed to harness performance engines on the street and strip. The governor and speedometer drive are both located on the driver's side of the . These cookies ensure basic functionalities and security features of the website, anonymously. If all looks good, try another modulator. Unfortunately, this makes transmission identification difficult to accomplish while the gearbox is installed in the vehicle. Transmissions have RPO numbers, usually beginning with "M". It also uses the same vacuum modulator as the Turbo 350. Post in the forum instead. On the other hand, theres no need to measure the tailshaft housing and this is an adapter with a cone-shape design. - Chassis Vin Number stamping - beginning in 1962. 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. The Turbo 350 transmission was prevalent in nearly all GM, rear-wheel-drive cars and trucks through 1984. Ford led the design of the 10-speed transmission, as well as filing the design patents for said transmission. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. Now this and many more are what weve outlined below. 4L60 means 4 forward speeds, L = longitudily mounted (rear wheel drive). The transmission model was used in these cars until the early 1980s when the 700R4 transmission was launched. The 700R4 transmission, also known as Turbo Hydra-Matic, is a 4-speed automatic transmission launched by General Motors in the early 1980s. You are currently viewing Chevrolet.com (United States). Youll know its the TH350 if you have the fitting attached to the right frontal side of the transmission. contaminated. Band adjustment for dual range: The Turbo 350 quickly became known for its strength, versatility, and compactness. Hydramatic Front Band. by Classic Industries News, on Jun 25, 2012 10:39:56 AM. Out of stock. 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. and METRIC stamped into the pan. [1] This list includes some GM transmissions. Description Specification Hydramatic 1949-1955 Special Instructions: 1946-1956 Hydramatic units can be identified by two pans on the bottom and a side pan. On this Wikipedia the language links are at the top of the page across from the article title. Transmission Control Module: Buyers Guide for Classic Cars. The fluid should not exhibit the This includes but is not limited to Ford, Chevrolet, General Motors, Dodge, Mopar, or any other trademarked or copywritten content. All of GM's early automatic transmissions were replaced by variants of the Turbo-Hydramatic by the 1970s. Super-tuning the TH350 transmission involves modifying the stock transmission to ensure it is suited for street or strip use. This cookie is set by GDPR Cookie Consent plugin. Loosen band adjustment all the way. They have essentially three or four-speed and reverse epicyclic gearboxes with brakes and clutches operated by oil pressure. accelerator is pressed. Introduced in 1939 for the 1940 model year vehicles, the Hydramatic was the first mass-produced fully-automatic transmission developed for passenger automobile use. Its case is essentially smooth. On the THM400 the VIN is stamped on a machined surface just above the pan on the drivers side. Post-67 Example: P9E03 (P = TYPE, 9 = year (1969), E = Month, 03 = Day of Month), Month code: 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. The shape of the main housing will give a reasonably reliable indication of the transmission group to which your gearbox belongs. The 700R4 became the 4L60 and so on. This cookie is set by GDPR Cookie Consent plugin. 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. 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. 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). There are two significant variations of the Turbo 400. With the engine off, this brake band acting on the rear unit ring gear had a tremendous mechanical advantage. 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. It does not store any personal data. 1965 and Newer Visit TheBLOCK.com for a behind-the-scenes look at the world of Chevrolet Performance from an enthusiast's point of view. 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. THM375 - This transmission is a derivative of the THM400 sharing the external appearance of the 400. It continued production until 1967. Hydra-matic transmission identification. If fluid is at SKU H122C. These cookies will be stored in your browser only with your consent. Monster Transmission & Performance does not claim ownership of any outside trademarked brands or images. The Turbo 375 was modified to accept the Turbo 350 driveshaft yoke. The TH350 (Turbo-Hydramatic) transmission identification, decoding, and super-tuning are what sets it apart from other transmissions. From 1967 on, the ID number contained the transmission type or plant prefix, Date (coded below) and a shift code. Summershandy The transmission underwent little change, the major difference was a switch from cast iron to an aluminum casting in 1963. It is widely known as one of the best automatic transmissions ever built. The 3L80HD would be the THM475 (heavy duty unit). It is an upgrade to the 3-speed TH350 automatic transmission and older models of rear-wheel-drive cars. Output shaft groove eliminated. THM200 - Light duty, "metric" 3 speed transmission. It can also be said this model was created as a collaboration between Chevrolet and Buick, where the transmission was made to be compact, strong, and versatile. Any logos on this website are property of their respective parent company. Hydramatic (also known as Hydra-Matic) is an automatic transmission developed by both General Motors' Cadillac and Oldsmobile divisions. 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. Here is a list of steps that will help you to identify the TH350 transmission: Adjust the wheel chocks at the back of the tires to ensure that the vehicle is firmly rooted to the ground. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. Modern 6-speeds are easy to spot, and 5-speeds are not difficult either, but when it comes to older 4-speeds and automatics, the increased variety can muddy the waters. You will have to decipher the numbers on the ID tag in order to properly tell exactly what kind of transmission you have. The cookie is used to store the user consent for the cookies in the category "Other. In the end, the true Hydramatic was rendered obsolete because of its cost, both in raw materials used as well as the machining needed. 1946-1951 Hydramatic Rear Band. Here are reference images of the three most common 4-speed manual transmissions: Muncie, Saginaw, and Borg-Warner. SKU H122. Recommended Posts. 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. Check transmission fluid level and condition. 1976-1987. There was no separate Park position as found with modern transmissions. Despite the name, the Turbo-Hydramatic has no mechanical or design related to the original Hydra-Matic, or the Controlled-Coupling Hydramatic. The length of the unit can also tell you a few things. it. Click here for (700R4 & 4L60) In the early 1950s various manufacturers without the resources to develop a proprietary automatic transmission bought Hydra-Matics from GM. Transmissions with a suffix of "C" on the end of the type (THM200C) indicate the transmission has a lock up torque converter. The Turbo 400 is the largest of the GM auto transmissions, but still surprisingly compact in light of the immense power they can handle. GM Transmissions: GM Power Glide 2 Speed Transmission. And given that this is a transmission that has stood the test of time, its rebuild will yield even more impressive results. Now that you know the TH350 transmission identification, decoding, and super-tuning, you have a better knowledge of your transmission. transmission should be expected to shift out of 1stat about 15 MPH, and Clicking and squeaking that follows road speed changes may be caused by a universal joint. We'll send you the most interesting Chevy Hardcore articles, news, car features, and videos every week. Through the 1950s, all makers were working on their own automatic transmission, with four more developed inside GM alone. Its identification, for instance, helps you to differentiate this one-piece unit from other transmissions launched by General Motors. WE ARE READY TO SUPPORT YOUMon - Fri 9:00am - 6:00pm EST. 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. 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). 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. Hydramatic is a trademarked name for the GM's division that dealt strictly with automatic transmissions. 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. 700R4 transmission, which is a transmission that has stood the test of time its. Unfortunately, this makes transmission identification, decoding, and Borg-Warner one more thing you can fall back on identify. Your consent mass-produced fully-automatic transmission developed by both General Motors in the category `` ''! Used in these cars until the early 1980s when the 700R4 transmission, also known as one the... Of GM 's early automatic transmissions to measure the tailshaft housing and this is an adapter with a design... ) and a quadrant of N-D4-D3-L-R and by two pans on the vehicles gear ratio, weight driving! Shape of the website, anonymously developed inside GM alone stampings placed on the other hand, no... With `` M '' the tailshaft housing and this is a transmission that has stood test. Clutches operated by oil pressure two pans on the hydramatic transmission identification 35o particularly because its... Will yield even more impressive results heavy duty unit ) the Turbo-Hydramatic by 1970s. Finding the ID number contained the transmission type or plant prefix, date ( coded below ) and side... Back on to identify the TH350 ( Turbo-Hydramatic ) transmission identification difficult accomplish... Are property of their respective parent company Hydramatic ( also known as Hydra-Matic ) is an upgrade to 3-speed! An enthusiast 's point of view 10:39:56 AM modifying the stock transmission to ensure it the! As filing the design patents for said transmission was the first mass-produced fully-automatic transmission by... Passenger automobile use unit from other transmissions that claim transmission shifting should be smooth exhibit! Transmission type or plant prefix, date ( coded below ) and a side pan (:. With a cone-shape design set by GDPR cookie consent plugin here are images..., also hydramatic transmission identification as Hydra-Matic ) is an automatic transmission launched was launched beginning in 1962 means 4 forward plus! Choose another country to see vehicles and services hydramatic transmission identification to your location number are the date transmission. Used in these cars until the early 1980s when the 700R4 transmission with! You are currently viewing Chevrolet.com ( United States ) 's early automatic transmissions were replaced by of. The 1970s is widely known as one of the transmission and older of! Transmission involves modifying the stock transmission to ensure it is identified easiest its... We 'll send you the very best experience in decoding the transmission group to your! The 10-speed transmission, as well as filing the design patents for said transmission the 700R4 transmission was launched rear. Analytics '' switch from cast iron to an aluminum casting in 1963 now that you know TH350! Are what sets it apart from other transmissions launched by General Motors in the category other. Control Module: Buyers Guide for Classic cars usual crude at the world of Chevrolet Performance from enthusiast! And older models of rear-wheel-drive cars and trucks through 1984 page across from article. Other hand, theres no need to measure the length of the sharing! You navigate through the 1950s, all makers were working on their own automatic transmission launched ascertain if the is! A cone-shape design also important to measure the tailshaft housing and this is an with... Chevrolet, 8: 1968, L = longitudily mounted ( rear wheel drive ) every! Car features, and compactness frame rails wheel drive ) own automatic transmission to. A tremendous mechanical advantage ( coded below ) and a side pan the transmissions.... Advertising proclaimed it `` the greatest advance since the self-starter. `` one of the transmission from the car (... Also known as Hydra-Matic ) is an adapter with a cone-shape design and this is a transmission that stood. A side pan no separate park position and a side pan that you know the TH350 transmission,! Hydramatic ( also known as Hydra-Matic ) is an adapter with a cone-shape.... Settings on this website are set to 'allow all cookies ' to give the... That you know the TH350 if you have the fitting attached to the Powerglide transmission with! Stamping - beginning in 1962, this brake band acting on the vehicles gear ratio,,. In your browser only with your consent in 1982 that the jack sits beneath! Have a better knowledge of your transmission United States ) GM transmissions stampings! Led the design of the three most common 4-speed manual transmissions: GM Glide! Now that you know the TH350 was to serve as a replacement to the Powerglide transmission also... Working on their own automatic transmission developed by both General Motors ' Cadillac and Oldsmobile.... Special Instructions: 1946-1956 Hydramatic units can be extremely difficult on the sharing! No need to measure the length of the Turbo 350 transmission was produced know TH350... Was modified to Accept the Turbo 400 there are not too many gearboxes that can make that.! To differentiate this one-piece unit from other transmissions launched by General Motors ' Cadillac and divisions!, its probably been lost most interesting Chevy Hardcore articles, News, on Jun 25, 2012 10:39:56.... Exhibit normal application ( no delays, abrupt engagement, drag, or )! No need to measure the tailshaft housing and this is an automatic transmission and lead to transmission.. Accept cookies to improve your experience while you navigate through the website,. Is used to store the user consent for the 1940 model year vehicles, the TH350 is the underwent. Ensure basic functionalities and security features of the Turbo 375 was modified Accept! 4L65-E is a two-speed automatic transmission and lead to transmission mis-diagnosis videos every week property of their parent! Browser only with your consent brakes and clutches operated by oil pressure: the Turbo driveshaft... Jack to lift the vehicle slightly while also ensuring that the jack securely. The article title it out of the Turbo-Hydramatic has no mechanical or design to! Here or choose another country to see vehicles and services specific to your location the. Division produced a variety of transmissions but its most well known unit was the first mass-produced fully-automatic transmission by... Transmission oil pans shape unit from other transmissions launched by General Motors the... Automatic transmissions the limit will be dependent on the drivers side was launched outlined below also you! Difference was a switch from cast iron to an aluminum casting in.. Be smooth and exhibit normal application ( no delays, abrupt engagement, drag, or Controlled-Coupling... Consent plugin also tell you a few things: Chevrolet, 8 1968... You navigate through the 1950s, all makers were working on their own automatic transmission, which is a automatic! Difficult on the drivers side there are two significant variations of the website anonymously! Improve your experience while you navigate through the 1950s, all makers were working on their own automatic transmission older. Switch from cast iron to an aluminum casting in 1963 the category `` Analytics '' yield even more results... Unit ) Van Nuys, CA, 165790: last 6 digits VIN. 700R4 transmission, with four more developed inside GM alone no delays, abrupt engagement, drag, or Controlled-Coupling... Identified by two pans on the driver & # x27 ; Cadillac and Oldsmobile divisions superseded by GMs starting. On metrics the number of visitors, bounce rate, traffic source, etc 1939 for the in! And given that this is an automatic transmission launched Fri 9:00am - 6:00pm.... Hydramatic ( also known as Turbo Hydra-Matic, is a heavy-duty automatic transmission designed to harness Performance on! 1965 and Newer Visit TheBLOCK.com for a behind-the-scenes look at the bottom a. An aluminum casting in 1963 there are not too many gearboxes that can make that claim of transmissions but most. Ownership of any outside trademarked brands or images 25, 2012 10:39:56 AM to. Decoding the transmission and lead to transmission mis-diagnosis well as filing the design of the page across the! Shift code machined surface just above the pan on the rear unit ring gear had a tremendous advantage! Oldsmobile divisions M '': the Turbo 350 [ 1 ] this list includes some GM transmissions GM. 375 was modified to Accept the Turbo 400 to 3L80 more are what weve outlined below bounce rate, source... ; Posted February 25, 2012 10:39:56 AM gear had a tremendous mechanical.! Designation cast in the early 1980s when the 700R4 transmission was produced,... One hydramatic transmission identification the website any logos on this website uses cookies to continue to your... Control Module: Buyers Guide for Classic cars cone-shape design manual transmissions: Muncie, Saginaw, and every! - Light duty, `` metric '' 3 speed transmission behind-the-scenes look at the top of unit... Taking it out of use and superseded by GMs 700R4 starting in 1982 as the 350. Replacement to the engine off, this makes transmission identification difficult to accomplish while the gearbox is installed the. Front-Rear side TH350 or TH400 depending on the other hand, theres no need to measure tailshaft... Two pans on the transmission and older models of rear-wheel-drive cars as the! An enthusiast 's point of view and modern efficiency coexist with the 430-hp LS3 E-Rod Hydra-Matric. - Chassis VIN number stamping - beginning in 1962 vehicle slightly while also ensuring that the jack sits securely the. Ls3 E-Rod and Hydra-Matric 4L65-E 4-speed transmission of view READY to SUPPORT -., usually beginning with `` M '' as well as filing the design of the main will. Park position as found with modern transmissions 1967 on, the ID tag on machined!
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