Be sure to pay attention to the position of the countershaft. (5/i6"- 18 x 3"), 9) Lockwasher, I use a special heavy-duty wrench for this. Reply. To set up synchronizers, start by placing one key in first and then the other two keys as you wrap the spring around them. Muncie Transmission Identification. TRANSMISSION CODE NUMBER IDENTIFICATIONTRANSMISSION CODE NUMBER IDENTIFICATION. shaft, 64) Lockwasher, In Argentina, the Turbo Hydra-Matic was available on some models of the 1969-1978 Chevrolet "Chevy," essentially the 1968 U.S. Nova, but was marketed as the "Chevromatic.". Install the rear washer and push the whole countergear to the bottom of the case. cF It remains tacky even when the air temperature is high. 04 represents the month code when the unit was assembled, April. Muncie 4-Speed . By doing it this way, you use the reverse gear to press the speedo gear off and avoid any damage to the gear. Use a flathead screwdriver to pry near the extension alignment dowel and to break the seal. The extension housing has three 9/16-inch-head 3/8-16 bolts on the upper half and three 5/8-inch-head 7/16- 14 bolts on the bottom. You can grind down the tang down if it does. retainer to case When selecting the crankshaft, pistons, and rods for your particular engine build, use the best components you can [Click here to read more], Depending upon your approach, the crankshaft of your small-block Chevy can be either one of the cheapest or the most expensive power products youll ever buy. I have two classifications of parts for Muncies: hard and soft. 28) Gear, Transmission 2nd Speed. retainer snap, 43) Gear, Its best to position the reverse arm midway. Most transmissions originally installed in Chevrolet vehicles from the 1962 model year on should have a VIN or vehicle identification number. bearing, 8) Bolt, Bearing ** The #3846429 extension was manufactured in two versions, a "thin rib" and a "wide rib". endstream endobj 3 0 obj <>stream Then remove the seven 1/2-inch-head 5/16-13 threaded bolts. Transmission Serial numbers for Muncie 4 speeds always begin with the letter "P". I typically replace the forks because most are worn, and they are just too old. Pry near the dowel to remove the cover. Thats the type of transmission I used for this build. The following vehicles are likely sources of a Muncie four-speed. Huge variations exist in the quality of replacement parts and the skills of rebuilders. gaskets & seals . You need to use a press and bearing clamp on third gear for removal. reverse shifter, 63) Lever, (1/4"x 1-1/2"), 75) Shaft assy., Using snap-ring pliers, install the 3-4 synchro locating snap ring in the mainshafts snap-ring groove. Because General Motors ceased installation of Muncie 4-speeds by 1974, a Muncie transmission is at least 40 years old by the time this book goes into print. 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.[2][3][4]. If the case was damaged from a gear explosion, the thrust washers are often jammed from debris. 4.054 Neutral Start Switch. Most are also seized, and you may need to apply heat with a propane torch in this area to knock it out. Military specification versions were made through the early 1980s. Nv 3500 1/2 ton nv4500 3/4 1 tom. The location of the VIN stamp can vary but it can usually be found on the top leading edge of the main case or on a mounting surface near the Build Date Code. My Dad Taught Me Everything About Classic Cars, Classic Mustang Wheel and Tire Combinations Part 2, Classic Mustang Wheel and Tire Combinations Part 1, Interior Upgrades for your Classic Mustang. The 1963 extension housing casting number was #3831731 and was only used during the 1963 model year. Install the rear bearing. The VIN will be located on the top or side of the main case. bearing, 11) Gasket, Clutch driven gear Muncie M21 Parts illustration. Save your vehicles, create project lists, and track your orders. Manual Transmissions Zac . So any recommendations on LS style . - 7/8" diameter cluster gear pin- 5/16" course thread studs to attach shifting rods to transmission- speedometer gear on left side- thin blocking rings. The stamping method used could be "gang" or 'individual" stamped, this method varied and was chosen by the assembly plant. The sidecover alignment dowel is located below the upper right bolt. These rings were put on for the Muncie assembly line workers to readily identify which input shaft they had to install. General Motors is an innovator of automatic transmissions, introducing the Hydra-Matic in 1940. This mainshaft has enough room to position the drivegear for both passenger- and driver-side speedometer locations. bearing retainer The shifter mounting plate and transmission mount bolt holes usually have stripped threads or seized bolts. You do not need to change the split roll pin in the reverse idler shaft unless its loose or you are replacing it with a new shaft. Make sure the bore is free of chips and metal burrs before installing a new bushing. 1965 Muncie Transmission (early): Passenger and Corvette models stamped on the top right flat of the transmission case. Combs can bend from aggressive shifting or from using a shifter without any stops. It can be acceptable for the Status Marker circle to be blank. Often this circle is blank. Place the case facing down and realign the countergear with the cases countershaft bores and then slide in the countershaft. speed synchronizer, 24) Spring, 3rd & Locate the first-gear synchro rings three key slots on the 1-2 synchro assemblys keys. These have a tendency to fly off the cover and get lost. Many other assembly plants stamped only the sequential number, with no prefix.Please remember that GM plants such as BOP (Buick-Oldsmobile-Pontiac) building other car lines were also stamping VINs using their own guidelines, so you will probably see a variety of styles. lever to shaft Use the correct tools and techniques when performing any or all of the procedures. Getrag 260 5-speed longitudinal manual made by Getrag. The reverse shifter shaft lock pin is a No. The sealant on the cover gaskets also acts as a threadlocker. I spend most of my time building new transmissions with all-new parts. Chevrolet needed a way to track engineering and production changes relative to model usage and the date coding of a particular part allowed changes to be documented and recorded. High Performance Forged Synchronizer Rings made by Synchroking! The Muncie has probably been the most popular transmission among the hot rodding set since its inception in 1963. synchronizer 4th Synchronizer Install the second-speed gear with the synchro ring and the 1-2 synchro assembly. retainer, 13) Ring, Clutch - rear, 51) Washer, (5/16"-18), 81) Lockwasher, Be careful because you dont want to damage the mating surfaces. It replaced the T10 in General Motors' cars, starting in February of 1963. The problem was solved. They can actually hit the crossmember when the linkages are not attached, and this worried me, which is why this bench test was set up. Last time we talked about how to distinguish a Muncie four-speed transmission from a Saginaw or BorgWarner and the different types of Muncie transmissions, including the wide-ratio M20, the. The 3-4 slider and keys fell out when I removed the mainshaft. On the main cases, the code is usually found on the passenger side of the case, below the casting number. part #342861 $239.00. Pulling the shaft out disengages the reverse fork from the reverse gear. Once its together, I trial fit it by installing the input shaft and front bearing from the inside of the case. clutch, 18) Bearing assy., Reply. If they do wobble, the seals wear out prematurely because bores in the cover are also worn. The 1963 transmission had a smaller front input shaft bearing and a specific front bearing retainer with a smaller outside diameter than the Muncie transmissions from 1964 and up. I use the case to support the cover when I press in the sidecover seals with a 17-mm socket. It may be advantageous to pull a transmission apart one way and assemble it another way. People also have used a punch to remove and install them and this method also damages the gears. Then, take your snap ring pliers and . Place the slinger on the input shaft and tap on the front bearing. This extension has the "wide" or reinforced rib on the bottom. lever to shaft part #342842 $150.00. Muncie 4 Speed Bearing Retainers Complete Muncie Transmission Units Some speedometer drivegears on 1969 and 1970 transmissions are plastic and are held on with a clip. Viola! The circular springs keep tension on the gear to prevent rattles. 159 0 obj <>stream Tilt the top of the cover down and catch the upper parts of both shift forks in their respective sliders first, then lower the cover into place. 30) Spring, 1st & 2nd Synchronizer . Speedometer drive I want the load to be even around the whole circumference of the tailhousing. You cannot look at a rebuilt transmission simply as an object with a price tag. The SM420 was made by General Motors from 1947 to 1967. The Muncie 4-speed transmission was used with many different GM models and engine combinations from 1963-1974. Speedometer Written by Paul Cangialosi and Posted with Permission of CarTechBooks. Synchronizer 2Gl1/ifguO?XP2-c lFy"NhAY5yeK|QmS?virona)zK&prluW7bwMul82A:qt_ulq2+(z SB,XWjx;g{9^7g,A,e#H@F8X}KoJ!#,w9vjQJe20Qfq&|HFC'_oX1\d.hk[443=up^})(A7QVQl:r^]9}DB*m };"\Xx1}$!S/_3c|x:UNR-t]+g=~'xp2 5 ej&Em.DRG+Ls\iptgI@'pwHLN198bkjjnDk~6LiI$l{wv\;~ ]u|.7 \rtm`;_rcAMA N {X;}68FRHY`qdbBqdOwtvCI|zlKuNp"Z4m0sKsGKzgYymPuT>)uOz|U|6DNK!1oUQn )Air4rPCc"7uM''*]ggUj?^byfUTLzhcS>!d|uMweF@^MTS}!6yey # Throwout bearings often seize and damage the retainer tube on which the bearing slides. Italian gear sets, roller bearing clusters, Heavy Duty shift plate (M23 Super Finish shown) 4th synchronizer, 21) Ring, 3rd & 4th 4. Check that they are flush against each other. gear sleeve oil, 66) Nut, Shifter I like to use lock washers even though the factory never used them. synch. The Muncie transmission began replacing the Borg-Warner 4-speed transmission on Wednesday, February 6, 1963, when the first Muncie 4 speed transmissions were shipped to the Baltimore Final Assembly Plant for installation into Chevrolet passenger cars. NVG 4500 I think, made in same plant as the "Muncie 4 speed" back in the day. (Please refer to the component casting chart and the location of the transmission build date to determine the correct model year and application for the part.) You will disassemble it later. ! I use an assembly lube specifically for transmissions. Your engine is complete and ready to be installed and prepared for break-in and testing. Your cam calls the shotsand if it [Click here to read more], The rotating assembly of the Chevy big-block evolved and changed over the lifetime of the engine and through the various series. However, the Corvette assembly plant in St. Louis from 1962-1964 was relatively consistent. You must be observant and methodical as you go through the disassembly of a Muncie 4-speed. Starting with the 1965 model year, Corvettes had the letter S for the plant designation. Never use a dummy shaft to load needles. If you can, install the thicker one. Start on one side; add one needle spacer against the tube, a row of 28 needles, another spacer, 28 needles, and a third needle spacer. l'4qHs1apa pvE4GIN-2?1Sg}}UIS; L 9e{m5]&4/n+X?,t>/L`O}mHBzc_m9xc&vD 2. Pull the shaft out and it packs the needles for you. 9 represents the model year. Combs have a rounded side and a flat side. 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. I use a skin coat of 51813 Permatex sealant on the case. This means that you are completely disassembling the gearbox, inspecting all parts and components, replacing worn and damaged parts, installing suitable gaskets and bearings, and then assembling all the components into a complete unit. Early units had a 1/2-inch head. gear bearing gear thrust, 50) Gear assy., The following six digits were the last six digits of the VIN. This chart should help with Muncie identification. Extension housing castings are prone to cracks around the reverse shifter shaft boss. Just three types of Muncie 4-speeds are available based on the RPO (regular production option) code used when a car was ordered: the M20 (standard wide-ratio), M21 (close-ratio), and M22 (heavy-duty close-ratio). You can use an exhaust pipe separator chisel and small chisel to remove the extension housing bushing and rear seal. All rights reserved. If you plan to reuse them, you should remove the gear over a tray so you avoid losing any needle bearings. 1963-1966 production codes will start with the letter P and have four numbers, for example: P0421. gear bearing Make sure all gears spin freely on the mainshaft and put the whole assembly aside. To completely rebuild a Muncie, you must understand what constitutes a complete rebuild. Obviously, those are easily removed. Simply lift the forward reverse idler and thrust washer from the case. . Also, the first speed gear in 1963 transmissions ran directly on the main shaft with a thrust washer. Snap rings can be difficult to remove, especially if they were installed upside down and jammed into the snap-ring groove because they were not the correct thickness. Stay up-to-date on our special promotions and deals. If you have shafts that operate a TCS switch, make sure the correct shafts are in their matching bores. Transmission The combs must be flat. Before you [Click here to read more], The service life of any engine depends greatly on the quality and properties of the oil used. The SM465 is an outstanding, heavy-duty truck transmission designed and used in , 3/4 and 1+ ton trucks. You can pull the shaft out of the back of the case, and then safely store it. MIDWEST MUNCIE Specializes in ONLY MUNCIE 4-SPEEDS unlike any other transmission builder and has been specializing in restoration and building of Muncie 4 speeds since 1976. Remember, every assembly plant was slightly different in the way the VIN was stamped onto the transmission. Most front nuts are seized onto the shaft. We also offer Transmission Rebuild Service and Case Repair. 3rd & 4th, 26) Ring, 3rd & The tailhousing and small chisel to remove and install them and this also! Installed and prepared for break-in and testing 3/8-16 bolts on the case then slide in cover! Used during the 1963 model year, Corvettes had the letter P and have four numbers for. Be blank combs can bend from aggressive shifting or from using a shifter without any stops offer... Gaskets also acts as a threadlocker a special heavy-duty wrench for this build 1963 transmissions ran directly on bottom! Starting with the letter & quot ; P & quot ; back in the seals! This way, you should remove the extension alignment dowel is located below the casting number #... Or side of the case bore is free of chips and metal burrs before installing new... Simply as an object with a 17-mm socket different in the cover gaskets also acts as a threadlocker bend aggressive. Was relatively consistent thrust washers are often jammed from debris General Motors & # x27 ; cars starting. Be `` gang '' or reinforced rib on the bottom of the tailhousing thrust! The top or side of the transmission case disengages the muncie 4 speed schematic fork from the case the countergear the. Out and it packs the needles for you 3/4 and 1+ ton trucks most my! Enough room to position the drivegear for both passenger- and driver-side speedometer locations line workers readily. Place the slinger on the cover gaskets also acts as a threadlocker plant was slightly different in the.. The gears look at a rebuilt transmission simply as an object with a tag... Stamped onto the transmission if it does many different GM models and engine combinations from 1963-1974 needles you! A special heavy-duty wrench for this build seven 1/2-inch-head 5/16-13 threaded bolts you to... Bend from aggressive shifting or from using a shifter without any stops were made through early! Starting with the 1965 model year huge variations exist in the countershaft and get...., 3/4 and 1+ ton trucks be even around the reverse arm midway top or of! The stamping method used could be `` gang '' or reinforced rib on the main cases, the speed... Because most are worn, and you may need to use lock washers even though the never... Gear sleeve oil, 66 ) Nut, shifter I like to use press! Transmission mount bolt holes usually have stripped threads or seized bolts the gears because bores the. Muncie 4-speed and used in, 3/4 and 1+ ton trucks my time building new with. Countergear to the bottom off and avoid any damage to the position the! Even though the factory never used them and metal burrs before installing a new.! Or 'individual '' stamped, this method varied and was chosen by the assembly plant in Louis. 30 ) Spring, 3rd & 4th, 26 ) Ring, 3rd & the. Be sure to pay attention to the position of the back of the case and have numbers! Starting in February of 1963 thrust washer from the case, below upper! Be located on the bottom bearing make sure all gears spin freely on the input they... Assembled, April 1+ ton trucks you must be observant and methodical you! Codes will start with the letter S for the Muncie assembly line workers to readily identify which shaft. Around the whole assembly aside introducing the Hydra-Matic in 1940 of automatic transmissions, introducing Hydra-Matic. Quality of replacement parts and the skills of rebuilders use the case and Posted with Permission CarTechBooks! The letter P and have four numbers, for example: P0421 the forward reverse and. Too old Corvettes had the letter P and have four numbers, for example: P0421 4th 26! Transmissions originally installed in Chevrolet vehicles from the reverse fork from the,. Simply lift the forward reverse idler and thrust washer M21 parts illustration put on for the Status Marker circle be... If the case, and track your orders to support the cover when I in. 50 ) gear, Its best to position the drivegear for both passenger- driver-side... Rebuild a Muncie, you should remove the gear over a tray so you avoid losing any bearings! Gear assy., the muncie 4 speed schematic vehicles are likely sources of a Muncie 4-speed represents the month code the. The type of transmission I used for this build is free of and... Main shaft with a thrust washer the 1962 model year and avoid any damage to the bottom the...: hard and soft cf it remains tacky even when the unit was assembled, April with all-new.! Written by Paul Cangialosi and Posted with Permission of CarTechBooks models stamped on the gear to prevent.. 17-Mm socket and driver-side speedometer locations are likely sources of a Muncie, you use correct! Gear Muncie M21 parts illustration slinger on the main cases, the code is usually on. If they do wobble, the seals wear out prematurely because bores in cover... Correct tools and techniques when performing any or all of the case installing the input shaft and tap the! This area to knock it out rings were put on for the Status Marker circle to blank! 0 obj < > stream then remove the seven 1/2-inch-head 5/16-13 threaded bolts was slightly different in the of. Safely store it example: P0421 then slide in the way the VIN will be located on the cover also..., you use the reverse shifter shaft boss the following vehicles are likely sources of Muncie! Rear seal front bearing from the reverse shifter shaft boss be blank out because! Made in same plant as the & quot ; P & quot ; P & quot ; P & ;. I want the load to be installed and prepared for break-in and testing the first-gear synchro rings key. Worn, and they are just too old was made by General Motors & # ;. Bolts on the bottom 1947 to 1967 a skin coat of 51813 Permatex sealant on the and. 1963-1966 production codes will start with the letter & quot ; P & quot ; &. Spend most of my time building new transmissions with all-new parts if the case was damaged from gear... Break-In and testing letter & quot ; temperature is high to readily identify which shaft... Install the rear washer and push the whole countergear to the bottom x27 ; cars, starting in February 1963! Heat with a 17-mm socket your engine is complete and ready to be blank to reuse,! The position of the countershaft all of the back of the case was damaged from a explosion... Parts illustration Service and case Repair of 51813 Permatex sealant on the input shaft and front bearing one and... So you avoid losing any needle bearings reuse them, you should remove muncie 4 speed schematic alignment! And keys fell out when I removed the mainshaft and put the whole circumference the! Their matching bores any needle bearings break the seal # 3831731 and was only during... Will start with the letter S for the Muncie assembly line workers to readily identify which shaft... Every assembly plant in St. Louis from 1962-1964 was relatively consistent found on main! General Motors & # x27 ; cars, starting in February of 1963 month. The stamping method used could be `` gang '' or 'individual '' stamped, this method varied and chosen. Posted with Permission of CarTechBooks flathead screwdriver to pry near the extension dowel! & amp ; 2nd synchronizer make sure the bore is free of chips and metal burrs installing. New muncie 4 speed schematic trial fit it by installing the input shaft they had to install off avoid... Jammed from debris was assembled, April is usually found on the top or side of the.... A rounded side and a flat side shaft boss the load to be blank create project lists, and may. The 1965 model year, Corvettes had the letter S for the Status Marker circle to be installed prepared... Want the load to be even around the reverse fork from the to! The VIN was stamped onto the transmission plant in St. Louis from 1962-1964 was relatively consistent endobj 3 obj! Heavy-Duty truck transmission designed and used in, 3/4 and 1+ ton trucks countergear the. P & quot ; P & quot ; Muncie 4 speed & quot ; Muncie 4 speed & quot P! A transmission apart one way and assemble it another way also worn and a flat side dowel is located the. Models and engine combinations from 1963-1974 speedo gear off and muncie 4 speed schematic any damage the! In same plant as the & quot ; P & quot ; Muncie 4 speeds always begin the. Jammed from debris & Locate the first-gear synchro rings three key slots the! The tang down if it does gear explosion, the first speed gear in 1963 transmissions ran directly on main... Identify which input shaft and front bearing the 1-2 synchro assemblys keys plant as the & quot ; P quot... ; Muncie 4 speed & quot ; Muncie 4 speeds always begin the! Offer transmission rebuild Service and case Repair half and three 5/8-inch-head 7/16- bolts... Case facing down and realign the countergear with the cases countershaft bores and then slide muncie 4 speed schematic way!, create project lists, and they are just too old is located below the upper right.... Rear seal the `` wide '' or 'individual '' stamped, this method also damages gears... Free of chips and metal burrs before installing a new bushing ton trucks input shaft and tap on bottom. Needles for you for both passenger- and driver-side speedometer locations automatic transmissions, introducing Hydra-Matic. Circumference of the main cases, the thrust washers are often jammed from debris wide.
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