Muncies are the hot tip, since they usually were used with high performance engines. 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. Dave Cruikshank is a lifelong car enthusiast and an editor at Power Automedia. gross weight. X3845157 GM. Numbers are displayed below, as they appear on the transmissions. You can find the assembly date code, casting number, and source serial number for vehicles GM manufactured after 1961. For example, the first X will be a Letter from A through L. 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 CAUTION: This transmission closely resembles 343 Saginaw. Use the following information to compare physical description of your Chevrolet or GMC manual transmission in order to identify what model transmission is, MySpace !function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs"); 4L80 - An overdrive model of the THM400. Saginaw 4 speed # 3925656 | NastyZ28.com It shifts wonderful and I'm delighted to have been dealing with Monster Transmission. Remember, check for a nearly square shape and 13 bolts. Look at the floorboards, and if there are only two pedals, the car is automatic. Transmission identification may be determined by finding the transmission application code in the following tables. The Borg Warner has a 9 bolt cover. A little engine degreaser and a wire brush often The NHTSA has some VIN check tools that can assist in identifying transmission types. Looks to be from a 68/9 camaro. Before using any method to find your transmission type, you should find out if its a manual or automatic transmission. From 1950-1973, most GM divisions used the iconic Powerglide transmission. JavaScript is disabled. Trust us to steer you in the right direction, when you choose to DIY. Please check your browser settings or contact your system administrator. The Turbo 350 quickly became known for its strength, versatility, and compactness. Pure dumb luck will lead you to a completely unmolested Muncie. VCCA members have access to a list of over 50 Technical Advisors who can help you with your car. The 1963-'65 M20 input shaft will not have grooves. If you have ever heard that the new Clean the area thoroughly and use a nice bright flashlight. stamped into it. The classic Muncie four-speed transmission in all its many forms generally looks like this (this one provided by Anaheim Gear), though applications will vary in appearance. GM Transmission Identification Guide: Chevrolet, Pontiac, Buick, & More The pan contains several stamped numbers and codes informing readers about the transmission system. 2001 - 2022 Monster Transmission and Performance, All Rights Reserved. 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. 13. PDF file: gm 3 speed manual transmission casting numbers Page: 1 Save this Book to Read gm 3 speed manual transmission casting numbers PDF eBook at our Online Library.. Guide to Muncie M20, M21, and M22 Four-Speed Transmissions This is a cast-aluminum bellhousing (PN SUM-700170), which offers an OEM look for Chevrolet applications. New Process Gear NP435 - 4-speed longitudinal transmission used in a select handful of 67-72 GM pickups How to Identify Your Transmission - OnAllCylinders as I can make it) transmission plant prefix list: Chevy Automatic Transmission Identification. Copyright Transmissions with a suffix of "C" on the end of the type (THM200C) indicate the transmission has a lock up torque converter. In the 1970s, virtually all Muncie four-speeds had 26-spline input shafts. The Muncie has probably been the most popular transmission among the hot rodding set since its inception in 1963. 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. More items related to this product. 21. Two are early style side covers. Need help to decode Saginaw 4 speed transmission. Theres a good number of vehicles that make use of both manual and automatic transmissions. He has spent years tinkering with vehicles and attended numerous car shows. 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. Not only are the Saginaw and Borg Warner side cover and tail housings constructed of different materials, but the reverse shifter arm of a Saginaw is on the side cover while the T10 is located on the tail housing. THM200-R4 - Used in GM rear wheel drive cars with the 3.8 V6, 305 & 350 Olds and 301 pontiac from 1981 to 1989. GM Turbo 2004R (2004R Transmission) Overdrive 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. Pre-1969 Muncies use a stud and nut at the indicated attachment point, while 1969 and later boltPRE 69' MUNCIE & ALL 69' & LATER MUNCIEMuncies use a bolt as illustrated on the right.BORG-WARNER SHAFTSTRANS ID 452,453 MUNCIE M-22 (453)TRANS ID 451 According to Koval, the easiest way to identify an automatic transmission, though, is by transmission pan shape. 3952645 shows up as the sidecover casting number for the 1972 Saginaw 3 speed. On the Turbo 400, the VIN is stamped on a machined surface just above the pan on the drivers side. Still hoping for some casting number identification assistance, if someone is willing to help. M38 Standard Turbo 350 manufactured from 1976 to 1981. Outside that, you can push in your clutch and hold the brake. The Saginaw four-speed box is quite similar to both the T-10 and Muncie four-speed transmissions. This version did not have a locking converter. Expect to find various combinations out there because these high-performance four-speed transmissions have been thrashed, trashed, and rebuilt through the decades. The two transmission systems manual and automatic, have different working principles. GM 8. The Turbo 475 was an extra-heavy-duty version and was found in larger trucks from 1971 on. 1962-1973. 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. PDF How to Identify Your Transmission Engine Identification - LMCTruck.com 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. This is a 4 speed, overdrive unit. 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. All rights reserved. Older vehicles are quite different because theres a lot of variety when it comes to transmission systems. Use the shifter to shift gears and note the number of times it shifts. He tells us both the M20 wide-ratio and M21 close-ratio transmissions were first offered in 1963. General Motors has variety when it comes to automatic transmissions, and some of them have different pan shapes. Comparison images courtesy of Hurst Shifters. We want to make your transmission search as simple as possible. You can find the exact transmission you have. 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. You need to look . Complete Transmission Lookup Tool from transend track of what was what, it's best to ID your gearbox visually, taking what is stamped on the Knowledge of your cars transmission system is helpful during repairs and car restoration projects. Input the VIN in a decoder and search. The Muncies appearance, design, and operation did not change much during the transmissions use in GM production cars. GM Turbo 400 TH400 Transmission 3 Speed Transmission. 9. General Transmission Identification. 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). Youll not only need to hunt for, and hopefully find the tag, but it needs to be free of enough gunk to be legible. Tailshaft housings will vary based on original application. Glean the basics and use them in your research. However, there are some methods you can apply to determine the transmission type your car uses. V8 engines included 283 and 327. This is usually a 7 digit number and each letter/number is about 1/2" tall. Next, carefully raise the vehicle with a jack. This page covers automatic trannies. Set up the wheel chocks behind the tires so theyre firmly on the ground. Aavailable in a 3 speed auto or 4 speed manual transmission. The Saginaw reverse shift lever is on the cover, and the cover has 7 bolts. thoughts? Varying axle ratios were featured on the various gearbox and engine types per the below table. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Do you know how to tell the difference between a Saginaw, a T10, and a Muncie four-speed? As a manufacturer, GM also applied numerous transmission systems in their older models. You can identify transmission numbers by checking on the transmission pan. 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. How to identify and decode chevrolet manual transmissions. Thank you Monster Transmission. If you do happen to stumble across Chevy four-speed at a swap meet, do you know what you are actually looking at? 3925658 does not match any casting numbers in my books. Effective October 21, 1968, an additional letter was added to the plant prefix number to help identify the gear ratios in Muncie transmissions. 3 Muncie 4 speeds were offered. You can check the cars specifications online to determine if it uses a manual or automatic transmission. Search transmissions by vehicle's VIN, License Plate, or Year/Make/Model information. theYear=now.getYear() hey Bob .I wish I could help out with your numbers on the trannys. For example, replacing a Powerglide with a Turbo 350 is an easy swap. The transmission pan is a wealth of knowledge because it has various inscriptions concerning the transmission. M33 This standard Turbo 350 code identifies it as a standard Turbo 350. Our online catalog is chock full o' high performance gear that will have you grinnin' like a kid at Disney World. 3854728. 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. What you will find in your search for the right Muncie four-speed is conflicting information from different sources. The If it has a cast-iron case with an aluminum side cover and tail housing, that will mean you have found a Borg Warner. The Turbo 350 transmission was prevalent in nearly all GM, rear-wheel-drive cars and trucks through 1984. Not only were they both popular transmissions in muscle cars and Corvettes, but many were even used after the muscle car era. If you are not sure how to distinguish between an M20, M21, or M22 Muncie, knowing what to look for can be tricky. A = Jan, B = Feb, C = Mar, D = Apr, E = May, H = Jun, K = Jul, M = Aug, P = Sep, R = Oct, S = Nov, T = Dec. I definitely recommend a look at these transmissions, you've got to have a look. You're going to find various combinations of main cases, tailshaft housings, and side covers coupled with variations inside of each case. Tweet When introduced in upper-level Chevrolet models in 1950, the Powerglide represented the first automatic transmission offered by the Big Three. - Chassis Vin Number stamping - beginning in 1962. 3845122 is the casting number of the transmission case for the 1955-1957 3 speed transmission for passenger cars and Corvettes. decode saginaw 4-speed | Team Camaro Tech The Side-by-side are the two countershaft support sizes, which are 7/8-inch (left) and 1.000-inch (right). You can also use VIN decoders to identify your transmission. On the right is the M22 countershaft with 27-teeth. GM Power Glide 2 Speed Transmission. This number will contain a division identification number, the model year, and the assembly plant and production sequence (last six digits) of the vehicle identification number (VIN) stamped onto the transmission. . NovaResource - Nova Transmission Codes Also, there were some input shafts produced by the aftermarket and General Motors that have no identifying rings on them. Generally found in Chevy & GM trucks, cadilacs and large displacement engined, full size GM rear wheel drive cars. Keep in mind, if you plan to drop one in a vehicle that makes more power than it did when it was stock, you might want to consider going with the Muncie if you plan to beat on it. Main cases manufactured prior to May 7, 1963, will say Patent Pending. K 170. Chevrolet Chevy Manual Transmission Identification and Decoding Part of the problem with GM 4-speed systems is that theres a lot of variety. 7. I have four transmissions, which I need to identify, before I can proceed. Never underestimate the mighty post-war Powerglide. During the run of General Motors inclusion of four speeds in their cars, there were three variations possible. and traction is enhanced, you can figure on eventually breaking the transmission. 1993 and Newer (4L60E), 1980-1991 (AOD) fileslib. A typical Saginaw assembly date stamp would be S313 indicating Saginaw trans produced March 13. GM transmission identification explained | REREV A = January through L = December.
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