gm 3 speed manual transmission casting number decoder

Anything after that time period will say US Patent No 3088336. Whats The Reason Enthusiasts Cant Get, Yes I Am A Dinosaur, And Why I Feel Electric Cars, Step-By-Step Birth Of A QA1 Adjustable Racing Shock, Readers Rig: Sterling Diesels Duramax-Powered C10, What I Learned Today With Jeff Smith Ensuring Wrist Pin Clearance, Corvette Enthusiasts Use Media To Share Z06 Delivery, Fenix Is A Next-Gen 69 Camaro With 1,180 Horsepower, Shop Tour: Brian Tooley Racing Expands To Be A One-Stop Shop, Moroso Anti-Roll Kit Is The Right Tool For The Dragstrip, Near where the shift linkage attaches to the body, Just above the housing on the right side of the pan, On the passenger side on a flange by the bell housing. The easiest way is by knowing the construction of each unit, and the differences are obvious. the angle of the gear teeth. Two are early style side covers. From 1967 on, the ID number contained the transmission type or plant prefix, Date (coded below), and a shift code. You don't have any products in your shopping cart. Use the shifter to shift gears and note the number of times it shifts. From 1963-'70, the Muncie was fitted with a 27-spline mainshaft and must have the corresponding slip yoke. Become a VCCA member! Automatic Transmissions Some transmissions may have a code stamped into their case or a tag riveted to them. We need to make note that the early Muncie transmissions offered between 1963 and 1965 utilized a 7/8-inch countershaft in the cluster gear, and those manufactured between 1966 and 1974 used a 1-inch diameter shaft. General Transmission Identification. Check the car flooring, and if theres a clutch pedal, the transmission is manual. Last edited: Dec 16, 2012. . Search transmissions by vehicle's VIN, License Plate, or Year/Make/Model information. In the early 90s, GM rebranded all of its transmissions. Outside that, you can push in your clutch and hold the brake. Randy Bolig has been working on cars and has been involved in the hobby ever since he bought his first car when he was only 14 years old. While you can get a lot of information for free in this forum, sometimes the info that you REALLY need is only available from the right person. The easiest way of knowing your GM transmission is by using a VIN decoder. Yes, there is a serial number on a transmission. From the outside, you should be able to make out the number on the metal dash plaque by looking through the glass. Some GM brand models even have different transmission pan shapes and transmission types for different years. It also uses the same vacuum modulator as the Turbo 350. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. 10. Some exceptions include the 1970 with either the SS396 or SS454, the 1971 and 1972 SS with the 454 engine where the H.D. The constants in decoding the transmission ID number are the date the transmission was produced. Of course, restorers and rebuilders will tend to re-stamp the date code to suit a particular restoration. style 235 gets better compression numbers with an "848" Head, look for the last three numbers of that Casting Number. It was used on large displacement, high . [CDATA[ There are different ways to determine the transmission type of a GM vehicle. Many enthusiasts feel that for a car to be a true muscle car it must have a four-speed transmission. It'll be marked 375-THM on the bottom of the tailshaft housing. Muncie 4-speed or TH400 were the only transmission options available. (center) Borg Warner (right). Thank you Monster Transmission. Chevy Automatic Transmission Description & Usage It shifts wonderful and I'm delighted to have been dealing with Monster Transmission. The standard 10-spline input shaft found its way into new Muncie M20 and M21 transmissions from 1971-'74. General Motors has produced a myriad of versions of its fabled automatic transmissions over the years, although three models make up the bulk of pre-ECM GM slushboxes; the. Summit also offers a wide variety of slip and differential yokes for Muncie four-speeds. The vehicle identification number (VIN) is a unique identifier for each vehicle (VIN). So now that we have given you some insight into identifying the Chevy four-speed transmission, the next time you are scouring the swap meets or local Craigslist ad, youll have a better understanding of what you are looking at, and youll get exactly what you want. Generally, in 68-71 vehicles, the switch is located on the carburetor. This is when you have to remove the side cover to see what's inside. You can check online auto repair websites, as some have free decoders. The easiest method of GM automatic transmission identification is to examine the transmission pan. From 1967 on, the ID number contained the transmission type or plant prefix, Date (coded below) and a shift code. There are six known Muncie side covers. Pure dumb luck will lead you to a completely unmolested Muncie. The numbers 3831707 and the shifter linkage being attached with studs and nuts make this a side cover for an early Muncie. CAUTION: This transmission closely resembles 343 Saginaw. Nowadays, most drivers are more familiar with automatic cars, and manufacturers mostly use automated transmission systems. Basically, GM stamped them anywhere they could find a suitable place in the casting. X3845157 GM. 0 grooves: First 2.84, Second 2.01, Third 1.34, Fourth, 1.00, 1 groove: First 2.54, Second 1.84, Third 1.44, Fourth, 1.00, 1 groove: First 2.54, Second 1.84, Third 1.32, Fourth, 1.00, 2 grooves: First 3.11, Second 2.20, Third 1.47, Fourth, 1.00, 3 grooves: First 3.50, Second 2.46, Third 1.65, Fourth, 1.00. 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. 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. For example, a GM vehicle from before 1967 has an ID tag that looks like C123N. The Muncies appearance, design, and operation did not change much during the transmissions use in GM production cars. The pan contains several stamped numbers and codes informing readers about the transmission system. It's worth the price of membership! Drivers dont usually have a problem with identifying modern manual 5-speed and 6-speed transmission systems. Before 1967, General Motors included extra information such as the plant code, shift code, and date of production on the ID tag. Transmission Stuff * Manual 3-speed transmissions * Muncie 4-speed Casting Numbers/Decoding/Identification * Powerglide * Turbo Hydramatic 350 * Turbo Hydramatic 400 * 200-4R/700R4 Overdrive * GM Transmission lengths & oil pan * Automatic transmission operating temps * TH350/TH400 Speedometer Gears Frames * Chevelle Frames Trim Tags It is good old-fashioned fun with a vintage synchromesh, journeying back to our youth when having a Muncie four-speed behind a big-block meant raw excitement. Hopefully, this guide can help you decipher what gearbox you have located if youre in need of a Chevy four speed, or if you are fortunate enough to happen across one stashed away in a barn somewhere. +$20.00 shipping. You will have to decipher the numbers on the ID tag in order to properly tell exactly what kind of transmission you have. And finally, if forced to choose between a Muncie or the BorgWarner T-10, it is suggested you choose the Muncie due to its brute strength. For 1971-'74, a larger diameter, 32-spline mainshaft was employed along with the corresponding yoke. Check through the information for your transmission identification. To add a little confusion to the mix, there were Borg-Warner Transmissions that feature aluminum cases and cast-iron side covers. 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. Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks. Basically, if you are installing one or the other in a car that will be a nice driver and see only minimal, spirited gear grabbing, both the Saginaw and the Borg-Warner can be a good and less expensive alternative to the more robust Muncie. Powered by UBB.threads PHP Forum Software 7.7.5. The 3-speeds were just as beefy and robust as their 4-speed counterparts. Knowledge of your cars transmission system is helpful during repairs and car restoration projects. 1965 and Newer. Go here for Chevy Manual Transmission Identification. Not a T10 (1304 series); If its iron and has all three shift levers on the side cover, its a Saginaw. The next numbers we need are the ones just below the Starter on the passenger side. The constants in decoding the trans ID number are the date the transmission was produced. The M22 Rock Crusher 26-spline input shaft sports a wider gear for greater torque capacity. All transmissions with a 26-spline input shaft used a 32-spline output shaft, and all those with a 10-spline input shaft were paired with a 27-spline output shaft. (AODE & 4R70W). //

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