Did you know that there are various models that were used in various cars? duty close ratio" M-22, also known as the "Rock Crusher". The materials used in case construction of a Muncie/Chevy four-speed mean that if you find one of these gear boxes in a shed or barn, the Muncie will probably be smooth and covered in grease and/or oil, while a Borg Warner or Saginaw transmission will usually be coated in a light layer of rust. All Prices are in USD. The numbers stamped below the shifter cover are M3E07A. Outside that, you can push in your clutch and hold the brake. I would expect the insides could have some of the same parts Good Luck! Transmission I. D. | Classic Parts Talk Now, lets explore GM transmission identification, the different methods, and more. Use the shifter to shift gears and note the number of times it shifts. You can check the cars specifications online to determine if it uses a manual or automatic transmission. Complete Transmission Lookup Tool from transend By 1963, the General had developed and worked with the Saginaw Corporation to develop a proprietary Chevy four-speed (based on components used in the Borg-Warner transmission). We are grateful for the fact that Monster Transmission has gone BEYOND and we will continue to be the best publicity that you will every have.. 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. Notice: Any comments posted herein do not necessarily reflect the official position of the VCCA. In 1974, the two-speed box then went to the great scrap heap in the sky. The T-10 four-speed was an evolution of the T-85 three-speed transmission, with both of these transmissions being quite similar in appearance. The 3-speeds were just as beefy and robust as their 4-speed counterparts. If the gear shifts five times, its a 4-speed transmission. However, this method requires extensive knowledge of the oil pans. On the right is the M22 countershaft with 27-teeth. In fact, 1963 is a standalone year because changes in this box came almost immediately for 1964, beginning with the front bearing retainer, which was aluminum for 1963 and became cast-iron in 1964. Found on 76 through 84 models. Dave Cruikshank is a lifelong car enthusiast and an editor at Power Automedia. 14. In 1974, the two-speed box then went to the great scrap heap in the sky. He digs all flavors of automobiles, from classic cars to modern EVs. The early GM Hydra-Matic transmission served the 1940-1968 Oldsmobile models. Typical Turbo 350 fluid pan. 3 speed manual out of a 55.1 Chevy Truck. The 1963-'65 M20 input shaft will not have grooves. [CDATA[ Manual transmission systems are straightforward to spot. 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. Chevrolet Chevy Manual Transmission Identification and Decoding 14" X 6" Rally 1 wheels were featured as an option on the 1966 GTO along with the standard 14" X 6" stamped steel . GM's goal with the Muncie four-speed was to produce a better shift employing larger synchro cones. A = Jan, B = Feb, C = Mar, D = Apr, E = May, H = Jun, K = Jul, M = Aug, P = Sep, R = Oct, S = Nov, T = Dec. NovaResource - Nova Transmission Codes Youll not only need to hunt for, and hopefully find the tag, but it needs to be free of enough gunk to be legible. THM200-R4 - Used in GM rear wheel drive cars with the 3.8 V6, 305 & 350 Olds and 301 pontiac from 1981 to 1989. It was standard equipment on large displacement, high-torque engines, and is generally found in trucks, and full-size GM rear-wheel-drive cars. 3L80 - The 3L80 is a renamed THM400, used in the early 1990's. Guide to Muncie M20, M21, and M22 Four-Speed Transmissions 18. saginaw serial numbers | NastyZ28.com Part number SUM-731001 is a 32-spline slip yoke for the Spicer 1350 U-joint and measures 6.250-inches long. Removal of the front bearing cover is where disassembly begins. Hi. Sep 20, 2004 #4 CRAZYREDNECK77 Member Sep 20, 2004 67 Main case#3925656 Extension#3925658 Side cover#6261886 also has a date 11-13-78 or 11-13-70 hard to make out . 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"); Here's another view of the M22's input shaft and countershaft. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. If you have ever heard that the new The muncie reverse lever is in the extention housing, and the cover has 7 bolts. The Turbo 350 transmission was prevalent in nearly all GM, rear-wheel-drive cars and trucks through 1984. The plant code was a prefix, while the production date had a numerical value. This is the M21 10-spline input shaft with a single groove and the applicable 27/22/19/17-tooth countershaft. The Head Casting number is located outside of the Valve Cover in plain site on the Drivers Side. You don't have any products in your shopping cart. I have four transmissions, which I need to identify, before I can proceed. Borg Warner once again started supplying four speeds to GM in the early 70s with the release of the Super T10. Muncie transmissions also tend to get performance improvements such as a gear ratio change and stronger internal parts. Not only were they both popular transmissions in muscle cars and Corvettes, but many were even used after the muscle car era. Your right, if we knew what the trannys went to , they could be of help to someone if not only for parts. Post-67 Example: P9E03 - (P = TYPE, 9 = year (1969), E = Month, 03 = Day of Month), Month code: (NOTICE this is NOT in alphabetic order) Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks. The differential ratio is stamped on the passenger side axle tube. FIRST TRANSMISSION. On modern models, you can tell which type of manual transmission a car has by looking at the top of the gear shifter. 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. 17. For a better experience, please enable JavaScript in your browser before proceeding. 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. 19. With an old GM 4-speed manual, you have to observe the transmission system side profile. 1. Saginaw 3 speeds were built in both Saginaw, Michigan & Munchie, Indiana. The Novak Guide to the GM Muncie SM465 Transmission The M22 Rock Crusher would come later to accommodate the heavy twist of Chevrolet's big-blocks in the mid-1960s. 2001 - 2022 Monster Transmission and Performance, All Rights Reserved. 1976-1987. It functions correctly. If you dont know where to check, the transmission usually stays around the area of the rear tires. Tweet Muncie Transmission Identification - 1968ss.com The 400 transmission has a main case of cast-aluminum alloy with a length of 24-3/8-inches long. Almost all Muncie transmissions were delivered with a groove(s) on the input shaft and counter gear. 3. When introduced in upper-level Chevrolet models in 1950, the Powerglide represented the first automatic transmission offered by the Big Three. Example: 19N500001. From the outside, you should be able to make out the number on the metal dash plaque by looking through the glass. 21. Discussion in '1947-1954' started by Blueflame236, Dec 15, 2012. . +$20.00 shipping. The transmission identification number or source serial number (chassis VIN) is usually located close to the transmission code. This page covers automatic trannies. (700R4 & 4L60) Trust us to steer you in the right direction, when you choose to DIY. Transmissions - Tripod The iconic Powerglide automatic transmission has Powerglide printed on its transmission pan. Keep this in mind when you're searching for a Muncie transmission. In the middle is the M21 countershaft and input shaft. H = Muncie / 3-speed K = McKinnon / 3-speed M = Muncie / 3-speed N = Muncie / 4-speed O = Saginaw / Overdrive P = Muncie / 4-speed M20 . Knowledge of your cars transmission system is helpful during repairs and car restoration projects. Many GM trannys had the VIN stamped on the maincase on the flange where it attaches to the tailshaft, but some of the later Saginaws had a pad machined into the case just for stamping the number. 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. GM 700R4 (4L60) not 4L60E . The Turbo 400 has a very distinct fluid pan. case. This decreased helix angle of the gear not only created a stronger gear set, but it also produced a substantial amount of gear whine which is highly noticeable when driving the car. There are not too many gearboxes that can make that claim. Serif is a seasoned automotive enthusiast with a passion for cars. Manual Trans Reference GM 3, 4, 5 and 6 speeds V24 How to identify chevrolet gmc manual transmissions Use the following information to compare physical description of your Chevrolet or GMC manual transmission in order to identify what model transmission is in your vehicle. The best way to ID the transmission is to count teeth. It is widely known as one of the best automatic transmissions ever built. These grooves are there to indicate the ratios of the gears inside the transmission. The Turbo 400 was GM's heavy-duty three-speed transmission used from 1964 to 1990. Varying axle ratios were featured on the various gearbox and engine types per the below table. Generally used in straight and V6 and small block engines. Off of the left side of trans: GM 3845122 H254 Thanks. We will safeguard your e-mail and only send content you request. From 1950-1973, most GM divisions used the iconic Powerglide transmission. First came the Borg-Warner T10 beginning in the late 50s. 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. A manual transmission requires the driver to switch gears manually. Need help to decode Saginaw 4 speed transmission. The transmission underwent little change, the major difference was a switch from cast iron to an aluminum casting in 1963. 4. GM Power Glide 2 Speed Transmission. Older vehicles are quite different because theres a lot of variety when it comes to transmission systems. The World's Best Chevrolet and GMC Club! These numbers can be found on the transmission case, and the first letter in this series of numbers is going to tell you exactly which Saginaw transmission you are looking at. GM's goal with the Muncie four-speed was to produce a better shift employing larger synchro cones. I don't think we can identify the tranny from that. The M22 to come later in 1967-'74 is also a close-ratio unit, but much stronger than the M21, with a higher torque capacity. It was phased out of use and superseded by GMs 700R4 starting in 1982. 1965 and Newer. Chevrolet Chevy Transmission Identification and Decoding It is a cast iron case tranny with either a 2.85 first gear or a 2.54 first gear. Transmission Identification & Decoding. Although the Muncie's bloodline goes way back, this legendary gearbox entered service for the Chevrolet Division in 1963. Depending on how you ordered your muscle car in the 60s and early 70s, you might have even benefitted from the famous Muncie transmission. tailgate or cargo doors. Measure the pan and examine the shape. The Borg Warner has a 9 bolt cover. General Motors has variety when it comes to automatic transmissions, and some of them have different pan shapes. Performance parts such as Hurst shifters were just as readily available for 3-speeds as with 4-speeds. 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).
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