gm 3 speed manual transmission casting number decoder

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. The casting number 3925660 denotes this as a 1968 1970 Muncie with a 1-inch cluster shaft. Some of these methods are: All the above-listed methods are dependable ways of identifying a cars transmission. The transmission pan is a wealth of knowledge because it has various inscriptions concerning the transmission. Download Gm manual transmission identification numbers, Read Online Gm manual transmission identification numbers, http://virtual-village.ning.com/photo/albums/pairing-apple-watch-i-icon-user-manual-guide, https://elimuspace.com/?post_type=dwqa-question&p=31547, https://smkn4malang.sch.id/?post_type=dwqa-question&p=28056, http://teslacommunity.com/photo/albums/nice-pancreatitis-guidelines#.Y3QvpNtByNQ, http://teslacommunity.com/photo/albums/kidde-carbon-monoxide-detector-installation-instructions#.Y3QvTdtByNQ, http://teslacommunity.com/photo/albums/barista-handbook-pdf#.Y3Qv8NtByNQ, http://teslacommunity.com/photo/albums/secadora-mabe-9-kilos-manual#.Y3QvQNtByNQ. What makes the small-bore and large-bore case Muncies different is the input shaft bearing size and first gear, which rode on the mainshaft void of a bushing for 1963. Muncie 4-speed or TH400 were the only transmission options available. The 400 transmission has a main case of cast-aluminum alloy with a length of 24-3/8-inches long. (on manual trans). The Borg Warner has a 9 bolt cover. It is easy to determine whether you have an early or later model Muncie four-speed transmission by the way the transmissions linkage arms are attached. 2023 Power Automedia. The easiest way of knowing your GM transmission is by using a VIN decoder. You can find the exact transmission you have. (700R4 & 4L60) Note the single groove, meaning an M21 close-ratio. That is why we offer multiple ways for you to search for your transmission. +$20.00 shipping. They used -E to distinguish the electro Hydra-Matic transmission from other non-electronic ones. If you are not sure how to distinguish between an M20, M21, or M22 Muncie, knowing what to look for can be tricky. The early GM Hydra-Matic transmission served the 1940-1968 Oldsmobile models. Before 1967, General Motors included extra information such as the plant code, shift code, and date of production on the ID tag. These classic GM models have different complex applications under manual transmission and automatic transmission. Need help to decode Saginaw 4 speed transmission. Outside that, you can push in your clutch and hold the brake. item 2 Restored GM Saginaw 3 Speed Manual Transmission 10 x 27 Select From 4 Ratios Restored GM Saginaw 3 Speed Manual Transmission 10 x 27 Select From 4 Ratios. You can find out if your GM model is automatic by using the same method. We will safeguard your e-mail and only send content you request. hey Bob .I wish I could help out with your numbers on the trannys. Afterward, you can count the bolts securing the pan. Check the car flooring, and if theres a clutch pedal, the transmission is manual. Responding to market demand for a three-speed automatic, The Turbo-Hydramatic 350 was introduced in 1969 as a replacement to the Powerglide in Chevrolet cars and trucks with six-cylinder engines or low-horsepower V8 engines. Cases are either small-bearing (1963) or large-bearing (1964-'74). 9. 4L60 - Early 1990's saw the 700R4 renamed to the 4L60, and "electronic" models were named 4L60E. Supposing it shifts six times, its a 5-speed system. There is also a fine-tooth 26-spline input shaft employed from 1971-'74. Casting Number Year Notes, 3831704 1963 7/8-inch cluster, small bearing, 3839606 1963 1964 7/8-inch cluster, 3851325 1964 1965 7/8-inch cluster, 3864848 1965 7/8-inch cluster, 3885010 1965 1967 1-inch cluster, 3925660 1968 1970 1-inch cluster, 3925661 1970 1974 1-inch cluster, Casting Year Notes, 3831731 1963 Thin fin tailshaft, drivers side speedometer, 27 spline, 3846429 1963 Thin fin tailshaft, drivers side speedometer, 27 spline, 3846429 1963 1965 Thick fintailshaft, drivers side speedometer, 27 spline, 9779246 1964 1965 Pontiac Catalina long tailshaft, passengers side speedometer, 27 spline, 3857584 1966 1970 Passengers side speedometer, 27 spline, 3978764 1970 1974 Passengers side speedometer, 32 spline. 4. YOU DO. Yes, there is a serial number on a transmission. 3925656 is the casting number for the saginaw used in 68-75 at least. Clean the area thoroughly and use a nice bright Vehicles leaving the factory with an axle ratio of 3.55 and numerically lower gears, typically incorporated a wide-ratio transmission. The M20 and M21 used a gearset with a more angled tooth design on each gear (left). The source serial number is from the CAR the transmission originally went into, NOT the assembly plant. . This includes but is not limited to Ford, Chevrolet, General Motors, Dodge, Mopar, or any other trademarked or copywritten content. Outside that, you can push in your clutch and hold the brake. The constants in decoding the trans ID number are the date the transmission was produced. Engine Casting Numbers Explained 1954-1962 Chevrolet, Serial Number/Engine Type/Series Designation, On the flat part of the Distributor Deck you will find a stamped Serial Number. From 1967 on, the ID number contained the transmission type or plant prefix, Date (coded below) and a shift code. box FWIW. Chevy Automatic Transmission Description & Usage In the middle is the M21 countershaft and input shaft. JavaScript is disabled. Terms of Service. Here's another view of the M22's input shaft and countershaft. Report an Issue | Because the Muncie has so much in common with the T-10 and even similar Saginaw boxes, it is easy to get this guy mixed up with non-Muncie units. 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. theYear=theYear+1900 This is when you have to remove the side cover to see what's inside. It is identified easiest by its 375-THM designation cast in the underside of the tail housing. The 17-character number is a form of code that identifies the vehicle's specifications. These grooves were cut into the input shaft so assembly line workers at the plant could easily identify which input shaft should be installed in a particular unit. Just because you've found a 26-spline input shaft does not mean you've found an M22 input shaft, which is made of a stronger alloy. The M22 Rock Crusher would come later to accommodate the heavy twist of Chevrolet's big-blocks in the mid-1960s. Generally, in 68-71 vehicles, the switch is located on the carburetor. S = Saginaw 3-speed A = 68/69 L6 Torque-Drive K = McKinnon 3-speed C = Cleveland Powerglide . Download Gm manual transmission identification numbers Read Online Gm manual transmission identification numbers. Yes, you can tell what type of transmission from a VIN number. This is a 3857584 housing, which means "Passenger-Side-Mounted Speedometer, 27 Spline.". 3925658 does not match any casting numbers in my books. You have to decode these simple codes to read and understand the information. It also has the numbers "4.3" cast in the block itself, which makes it easy to spot as the smaller 3.74-inch-bore block. Comparison images courtesy of Hurst Shifters. He digs all flavors of automobiles, from classic cars to modern EVs. Set up the wheel chocks behind the tires so theyre firmly on the ground. a usually four digit letter/number combination separated like this: X XX X. However, classic cars usually have manual transmissions. Few things excite like the sound and feel of an old-fashioned Chevrolet muscle car and that familiar whine of a classic Muncie four-speed transmission going through the gears. GM Turbo 2004R (2004R Transmission) Overdrive Transmission. It was standard equipment on large displacement, high-torque engines, and is generally found in trucks, and full-size GM rear-wheel-drive cars. Identify General Motors' Four-Speed Transmissions 1 groove: First 2.54, Second 1.84, Third 1.32, Fourth, 1.00 2 grooves: First 3.11, Second // ]]> Ning Network Name Goes Here. 2nd and 3rd row seats were optional. On the right is the M22 countershaft with 27-teeth. Its case is essentially smooth. Muncie Transmission Identification. 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. 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. Number is located on side cover. Knowing if your transmission is manual or automatic should be basic information. Due to this, the box tends to 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. 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Awfully close to a Muncie (3925660). // Houses For Rent In Mandeville, La, Articles G