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). Lift the countergear out of the case. Serial numbers for Muncie 4 speeds always begin with the letter "P". I have developed these during my 30-plus years in this line of work. The engine and transmission were stamped at the same time by the final assembly plant. Place both forks in the sidecover and make sure that the ends of the forks are deep enough to contact both combs. You will disassemble it later. Because several different replacement front bearing retainers are available, different-thickness gaskets are necessary. \;1"89ek5YAwG Rv($|)d On some main cases, such as the late model Saginaws, there is a cast and machined pad provided for the VIN. First and second gear, the 1-2 synchro assembly, first-gear sleeve, reverse gear, speedometer gear, and the rear bearing midplate slide off the shaft together. 'Muncie' 4-speed Manual transMission asseMBlies, Gears & parts HiGH perForMance 1963-1974 AUTO GEAR EQUIPMENT AUTO GEAR EQUIPMENT 530 State Fair Boulevard, Syracuse, NY 13204 (800) 634-3001, Inside New York: (315) 471-8141 Fax Numbers: (315) 471-8146 or (800) 537-4213 Email: service@autogear.net A transmission that leaks after a rebuild can be a huge disappointment. retainer snap, 43) Gear, Special wrenches are sold for removing them but may break during the removal process. l'4qHs1apa pvE4GIN-2?1Sg}}UIS; L 9e{m5]&4/n+X?,t>/L`O}mHBzc_m9xc&vD The top part of Status Marker circle will contain the latest blueprint changes. Remove both shift levers and mark them so they can be replaced in the same bores. Once the retainer is installed, clean up excess sealant and bend the lock tabs over. They have no moving parts and merely have to connect the carburetor or throttle body with the intake ports. The opposite side of the date marker has between one and five dots, representing the week of the month. The early #3846429 extension has the casting numbers cast directly into the part. Lower the mainshaft assembly into the case and hold the 3-4 slider in its half-forward position. (1/4"x 1-1/2"), 75) Shaft assy., Muncie Dissassembly Step 1: Remove Sidecover Bolts Start by placing the 1-2 shifter shaft in the second-gear position. Let me explain. The code consists of two circles, both 1/2-inch in diameter and divided in half. One circle is the Date Marker and the other circle is referred to as the Status Marker. 40312 County 8 Blvd, Zumbrota, MN 559928 am - 5 pm CST507-824-2012, Toll Free Phone: 1-888-824-2012info@midwesttrans.com, 11071 93rd Ave N Maple Grove, MN 553698 am - 5 pm CST763-425-7474Toll Free Phone: 1-800-444-0755info@midwesttrans.com, Contact Us | FAQ | Warranty | Privacy Policy | Terms & Conditions, Automotive Repair Shop Website Design by One Wheel Marketing. (5/i6"- 18 x 3"), 9) Lockwasher, 1965 Muncie Transmission (early): Passenger and Corvette models stamped on the top right flat of the transmission case. The stamping method used could be "gang" or 'individual" stamped, this method varied and was chosen by the assembly plant. 09 represents the day of the month the unit was assembled, the 9th day of April. Transmission 3rd Speed. New gears can have tight bushings, so be sure that it spins freely on the shaft before installing 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. You can copy and paste this link to share: https://www.chevydiy.com/how-to-rebuild-your-muncie-4-speed-a-complete-guide/. We also discussed the best ways to identify a Muncie, which is by the casting numbers on the external components of the transmission. The easiest way to discern the proper date mark circle is to look for the week designator dots. speed synchronizer, 24) Spring, 3rd & & retaining, 20) Sleeve, 3rd & Because youre taking apart the entire suspension, it makes sense to do this at a place where the truck can sit for a minimum of a [Click here to read more], Selecting a camshaft is one of the most important decisions youll face when building a high-performance small-block for street or bracket racing. Install the rear bearing. Shifter lever to shaft (5/16"), 65) Seal, Huge variations exist in the quality of replacement parts and the skills of rebuilders. If you have to press it on, support the bearing by the inner race and press the input shaft into it. 3. The problem was solved. The SM465 was made by General Motors from 1968 to 1991. Switches and Wiring. I use a micrometer because some rings only vary in thickness by .005 inch. Combs have a rounded side and a flat side. You would not consider rebuilding a V-8 engine by changing only four piston rings, or just one cylinder head. Muncies are rarely tight enough to need a press. Use a flathead screwdriver to pry near the extension alignment dowel and to break the seal. Having all these subassemblies ready to go on the mainshaft helps to keep you organized. detent (3/8" Dia. Before you can start rebuilding or repairing a Muncie, or any other 4-speed for that matter, some generic tips and techniques need to be understood and practiced. Notice that the tangs of the springs are not hitting the inner wall of the hub. Heat the speedo drivegear with a propane torch and slide it onto place. (5/16"- 18), 67) Washer, shifting clutch, 18) Bearing assy., This is the Muncie kit I designed and have sold for more than 30 years. Transmission Below find aparts illustration for the Muncie M21 4 speed manual transmissionused by General Motors between 1966 and 1974 in the following models: Pontiac Firebird, Catalina, Grand Prix, Lemans, Oldsmobile Cutlass, Jetstar, Cruiser, Chevrolet Camaro, Chevelle, El Camino Corvette and Nova. 1. Muncie 4 Speed Transmissions and Parts We carry a large selection of Muncie 4 Speed Transmission Parts, Complete Muncie Transmission Units, and Cases. I coat the outer edges of the sidecover seal with Permatex 51813. - rear, 54) Extension 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 # transmission countershaft, 4) Washer, Copyright 2022 Ecklers Automotive. If you can, install the thicker one. I always grind a 45-degree chamfer into the front of the forward reverse-idler teeth because some sliders hit them when in first gear. Pry under the reverse idler gear to remove the gear, thrust washer, and idler shaft. 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 close-ratio M21, and a second heavy-duty close-ratio M22, also known as the "Rock Crusher.". Muncie M21 Parts illustration. 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. This parts deals with case preparation.Mu. 33),WrPc J+lv&*iYk^5lmi)VA.f/|g% I apply red threadlocker to the threads on the input shaft and stake the nut with a punch over the air-bleed hole of the input. The seal presses against a step within the bore. Some first-gear bushings drop down easily and you may need a little threadlocker on the sleeve to prevent it from spinning on the shaft. 146 0 obj <> endobj *1sQawB5BNxenlVyM0*3R ,&#]Djmyp Apply the case to the midplate gasket and then apply another skin coat to the gasket. Use a 9/16 socket and torque the four bolts to 25 ft-lbs. synchronizer Its a good idea to clean up the edges with a file and check your clearances with a yoke before final assembly. gaskets & seals . 4. ), 10) Retainer, CHART *MUNCIE Shaft Identification: Muncie 4-speed transmissions can be distinguishedvfthe rom style of the transmission arm attachment. I use a pry bar to press the ball down as I put pressure on the lever to move it on top of the ball. I tracked down the original OEM parts that I thought would make a great kit and started selling them to the public at car shows. 159 0 obj <>stream Muncie manual trans. Multiple ratios, Heavy Duty case, center plate and tail. Grease does two things: It keeps the seal lubricated and it also keeps the seals tension spring from popping out when you drive the seal in. If you are reusing your old cage, hold the needles in place with grease on the outside perimeter of the cage and gently push it into place. What could [Click here to read more], Congratulations! Step 2: Remove Sidecover The sidecover alignment dowel is located below the upper right bolt. Always check to see that the date marked precedes the final assembly stamp code. Confused? 28) Gear, Transmission 2nd Speed. The reverse shifter shaft lock pin is a No. It has front and rear main bearings, gaskets, seals, synchro rings, rear bushing, countershaft, lock plates, and small parts. 2.698 Backup Light Switch Brackets. Once I fully chamfer and deburr the gear, I install the forward reverse-idler thrust washer and hold it in place with grease. Seat the nut with a swift strike from a hammer on the wrench. You are welcome to download and print this illustration. These rings were put on for the Muncie assembly line workers to readily identify which input shaft they had to install. 4th synchronizer, 21) Ring, 3rd & 4th - 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. 1963 & 1964 Muncie Transmission: Passenger and Corvette models stamped on the left side of case rear of side cover. With the spacer tube in place, load the split-seam tube. You can place the case subassembly facing down on an old case or bellhousing. Read further about Chevrolet's favorite gearbox. 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. Invest in the proper thread repair kits and seek out quality weld repair work if it becomes necessary. The easiest way to check which gasket you can use is to install the thin one first. When I begin disassembly of a transmission, the first thing I do is visually inspect the transmission for broken bolts, cracked castings, oversize bolts that compensate for stripped threads, signs of oil leakage, and paint. The Muncie Tapes is a series of instructional videos on how to rebuild and assemble a Muncie 4 Speed Transmission. The shifter mounting plate and transmission mount bolt holes usually have stripped threads or seized bolts. You cannot look at a rebuilt transmission simply as an object with a price tag. However, the Corvette assembly plant in St. Louis from 1962-1964 was relatively consistent. Trans. P represents the manufacturing plant, Muncie. This type of date coding is used on engine blocks, heads, transmission main case, transmission tailhousing, transmission side cover, etc. 4.054 Neutral Start Switch. sleeve, 61) Fork, Then, take your snap ring pliers and . Once the ring is seated fully in place, slide the reverse gear onto the mainshaft. 2.697 Wire assembly. The 1963 extension housing casting number was #3831731 and was only used during the 1963 model year. Reply. This transmission was similar to the successful Borg-Warner T-10. Never strike the input shaft itself. The following vehicles are likely sources of a Muncie four-speed. Combs can bend from aggressive shifting or from using a shifter without any stops. Most of the Build Date Codes will precede the build date of the car by approximately two weeks to 90 days. The circular springs keep tension on the gear to prevent rattles. If you think you are going to reuse them, mark the position and orientation of each fork so they can be reinstalled in the exact position. Install the rear washer and push the whole countergear to the bottom of the case. hT1O0ol\|:#10P,t45 u"@o]Ive"3-BCU_DWJMU^%{_B$F#UBK+%X.:5ss:azvc88,5n(.K}' _)qYeb-UP7 I All of the casting codes should be within 30 to 90 days of each other and in most cases will be reasonably close to each other. Place the cover in the second-gear position. Notice the way Im gripping the punch while tapping the bearing. Reverse idler 1. Trans. Sales & Service Teams now available 7 days a week! Usually the gear and 3-4 synchro hub dislodge if you hold third gear and gently tap on the front of the mainshaft. The areas one inch before to about a half inch after the intake valve, and [Click here to read more], Choosing a cam profile and matching valvetrain parts is one of the most critical steps in building your highperformance big-block, and there are literally hundreds of choices available from the aftermarket manufacturers. Use a 7/16-inch socket and torque the bolt and lock washer to 10 ft-lbs. This chart should help with Muncie identification. This transmission had no lock plates, but usually you would bend the lock tabs away from the bolts and remove the four 9/16-inch-head 3/8-16 bolts. Here, Im using a block of wood. synchronizer Focus on getting all the gears removed and then disassemble the sidecover and extension housing. The SM420 was made by General Motors from 1947 to 1967. q )A :l 4}3vNSK{^ %cD;&OJ! Log in to add vehicles or quickly search your stored vehicles. It can be acceptable for the Status Marker circle to be blank. Notice the positions of the cams and the spring. *This transmission is part of a joint-venture between General Motors and Ford Motor Company to split development of two transmissions, a longitudinal 10-speed and transverse 9-speed. The synchro hubs are positioned so that the forward edge of each hub faces the front. blocking, 37) Gear, 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. It is importing to understand that most all Chevrolet parts have some kind of date coding cast or stamped into the part. [1] This list includes some GM transmissions. shifter shaft, 86) Ring, Detent - rear, 51) Washer, Put the reverse tapered pin in after you check for binding, and make sure everything spins smoothly. I drive it straight down the shaft until its seated. The tip of the mainshaft is easily damaged. Start by using plenty of grease and insert the spacer tube. assy., Transmission, 55) Bushing, Remember that nothing smaller than 350 ci is worth building. (451) 7 bolt side cover used from 1963-68 * MUNCIE Shaft Identification The above Muncie 4 speed transmissions can be distinguished from the style of the transmission arm attachment. 3rd Speed, 28) Gear, The late 1964 extension housing casting number was also #3846429 and was used through February of 1965. The 3-4 slider and keys fell out when I removed the mainshaft. You can pull the shaft out of the back of the case, and then safely store it. This cover pivot pin was loose, so I coated it with Permatex 51813. At first I had alignment issues with the reverse lever and rod. Always reinstall the spring facing in this direction. Muncie 4 Speed Transmission M20, M21 & M22 with 1" counter shaft bore. Make sure the backside of the teeth faces the thrust washer. part #342861 $239.00. GM Muncie SM420 Transmission. There are two types of date coding. One half of the Date Marker circle will have a month designator for when the part was cast. Synchronizer, 35) Synchronizer I do it this way because other techniques call for you to hammer on the bearing after the input is installed and that can damage the fourth-gear ring. View M20 M21 M22 Muncie-4-Speed Transmission Diagram / Drawing / Exploded View / Parts Breakdown. The Muncie 4-speed transmission was used with many different GM models and engine combinations from 1963-1974. (never The first type of date coding can be found on parts that are comprised of several smaller components, such as alternators, distributors, etc. I use a 20-pound spring. Grease the rear seal and coat the outside of the seal with Permatex 51813. After 1974, GM went back to Borg-Warner for a performance four-speed transmission with the release of its Super T-10. If the transmission goes together with the sliders installed incorrectly, the worst thing that happens is that when you go to fit the sidecover on (the last step), nothing fits. This one is really tight and will have to be pressed off. The key difference between. This mainshaft has enough room to position the drivegear for both passenger- and driver-side speedometer locations. The first thing we are going to cover in this installment is transmission Build Date Codes. 2. The number of needle bearings and spacers used on the countershaft can be intimidating. Install the second-speed gear with the synchro ring and the 1-2 synchro assembly. NVG 4500 I think, made in same plant as the "Muncie 4 speed" back in the day. muncie. Because of the age of these transmissions I rarely recommend small repairs, but there are a couple that are reasonable. The first character was the last digit of the model year. 9 represents the model year. 3rd & 4th, 26) Ring, 3rd & This application uses a thin rib. Install the tailhousing bolts. Light tapping should drive the bearing out of the bore. 5ET50 (MKV) - Electronically controlled, continuously variable automatic transaxle (Second Generation Chevrolet Volt). R@W4a'K/n$ ~%JnH0('$uHQ2yh? Once you have adequately tapped on the bushing, the bushing drops right out. (11/32"x 11/16"), 69) Pin, Reverse Some later input shafts no longer have this hole; using red threadlocker is a must. Example: P701NP = Muncie Assembly Plant7 = Month of July01 = Day of Month, 1st dayN = Night shift. All Muncie 4-speed transmissions were stamped at the Muncie assembly plant with a production code number, consisting of a prefix letter, production date and shift suffix letter where day and night shifts were in operation. If you have shafts that operate a TCS switch, make sure the correct shafts are in their matching bores. For the best experience on our site, be sure to turn on Javascript in your browser. They are soft steel and are left-hand threaded. The object is to get the thickest ring in the rear mainshaft snap-ring groove. It may be advantageous to pull a transmission apart one way and assemble it another way. I have two classifications of parts for Muncies: hard and soft. 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. D represents the month code when the unit was assembled, April. Transmission shaft (11/32" x I always install the combs in the cover with the flat sides facing each other and then I attach the E-Clip to make sure it is fully seated in the pins groove. blocking, 30) Spring, 1st & (5/32"x 1-1/4), 70) Spring, The month is determined by numbers 1 through 12, which correlate with the months of the year. Most early electronic transmissions use the "-E" designator to differentiate them from their non-electronic cousins, but this has been dropped on transmissions with no mechanical version like the new GM 6L80 transmission. Sometimes you can spread the bushing end. The basic rear-wheel drive Turbo-Hydramatic spawned two front-wheel drive variants, the transverse Turbo-Hydramatic 125, and the longitudinal Turbo-Hydramatic 425. bearing, 11) Gasket, Clutch 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. These have a tendency to fly off the cover and get lost. It cannot go any farther. Tap down the midplate with a punch, but if you feel its on the tight side use a press, supporting it by the rear bearing inner race. 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. . Pull the shaft out and it packs the needles for you. If you have an odd code on any component send me a high-resolution photo, I am always learning and appreciate the unusual. Use snap-ring pliers to spread the rear bearing retaining ring open and then tap the bearing with a hammer to dislodge it from the ring. 1965-72 4 spd. In many ways, the camshaft is the command center of the engine. If you are reusing a case with a stock bore, use 51813 Permatex to coat the front bore and rear of the shaft. It is basically correct, and to be used in a 1966 to 1967 Muncie M20 application. reverse shifter, 63) Lever, Your engine is complete and ready to be installed and prepared for break-in and testing. Most are also seized, and you may need to apply heat with a propane torch in this area to knock it out. These seals seat in the bore with light taps. Placing it forward makes it easy to attach the fork to the reverse gear. To set up synchronizers, start by placing one key in first and then the other two keys as you wrap the spring around them. Many Muncie transmissions have had the input shaft replaced so this should not be used for positive identification of the transmission. This page is not available in other languages. Again, this is something you cannot do with a dummy shaft. Other Manual Transmission Links. P represents the manufacturing plant, Muncie. This frees up the geartrain. Once the clip is off, remove the cams. Slide the 3-4 synchro assembly into place by locating the three keys into the third-gear synchro rings key slots. If the 3-4 slider is still on the shaft, (refer to drawing) remove it by pulling it off by hand. Sometimes you can pry on this and remove the bearing. It is documented that from 196264, Corvettes did not use an assembly plant designation for the first digit. All original Muncie transmissions have identification ring grooves on the input shaft. Be careful not to damage the bore. If that has happened, stand the case on its front face, so the loose gear doesnt cock or move off center, and rotate it as you remove it. Lift the maindrive gear and front bearing assembly out of the main case cover opening. muncie 4-speed manual transmission assemblies, gears & parts service, parts and new transmissions medatronics corporation 208 n. us hwy 1 - unit 1 tequesta, fl 33469 email: support@5speeds.com website: m22power.com phone: 561-743-5600 Try to pull the gasket out. retainer, 12) Nut, Clutch The following six digits were the last six digits of the VIN. m20 m21 m22 '63-'74 4-speed manual transmissions: overhaul kit. Most of the Muncie four-speed transmissions will have a casting date code on the main case, extension housings, and side cover. I use grease to hold it in place. An easier solution would be to find one of the more standardized 2.52:1 or 2.20:1 Muncie four-speeds that were used from 1966-'74. You can also use the non-press or manual method to remove the front bearing. According to an official report by the SAE (Society of Automotive Engineers) the design of the 10-speed gearbox is essentially all Ford, while GM was responsible for designing the 9-speed 9T transverse automatic gearbox. The letter O would add confusion since it resembles zero. Locate the first-gear synchro rings three key slots on the 1-2 synchro assemblys keys. 3. A Dremel or rotary tool is helpful for deburring gears. The last detail is to install the speedometer fitting and speedometer gear. Instead, they used the model year number, for example, 4 for 1964. shifter shaft Once engaged in the input, push the 3-4 slider back into its neutral position. 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. gear bearing %PDF-1.2 % This is represented by the numbers 1 through 12 (Jan. Dec.). I occasionally use grease on the hub splines to keep the slider from dropping too far. Countershaft Corvettes saw installation by May through June of 1963. Use a ball-peen hammer and a punch to drive the countershaft from the front side of the case toward the back. Use an arbor press to remove the front bearing. Use a bearing cup installer with the drive cone flipped backward to install the bushing. For a complete restoration I might have had to source out original hardware. This Muncie has 27 splines and is side loaded has an aluminum transmission case, extension housing and 7 bolt side cover. In this case, youre loading 112 needle bearings. Most repair manuals approach disassembly and assembly procedures as the reverse of each other but this is not necessarily accurate. If you have to pull it apart again, it is one less step to perform. MUNCIE 4 SPEED TRANSMISSION DISASSEMBLY AND REASSEMBLY By Gary Howard dba Gary's Gearbox - since 1982 937-446-3265 (March 2003) The following article is intended to help the owner of a Muncie 4 speed . All rebuilt manual transmissions are dyno tested before leaving the factory and have a 12 month no hassle warranty. Italian gear sets, roller bearing clusters, Heavy Duty shift plate (M23 Super Finish shown) This is not model or year specific. Muncie casting date codes are very different from other transmission manufacturers. 1. gear sleeve oil, 66) Nut, Shifter I still don't know what clutch that I'm going to use, though. 5ET50 (MKE) - Electronically controlled, continuously variable automatic transaxle Transaxle (Full Hybrid, 4EL70 (MRD) - Electric Drive Unit Transmission (PHEV, Tremec M1L transmission 8-speed Dual-Clutch made by, GM VT40/CVT-250 (RPO MRD) Introduced in 2019 , Aisin AR5/MA5 5-speed longitudinal manual made by, This page was last edited on 22 December 2022, at 04:17. The original design retainer was manufactured out of aluminum, but the later replacement retainers were made out of cast iron. Reverse shifter used), 33) Spring, 1st & Muncie 4 Speed gasket and seal differences and installation techniques discussed.Get the Gaskets HERE: http://goo.gl/nTpY0HMy #1 BOOK ON MUNCIES IS: http://a. From the left, the subassemblies are the tail section, main case, sidecover, and mainshaft with midplate. There is another way to quickly identify Muncie transmissions. 4th Synchronizer ( Second Generation Chevrolet Volt ) the stamping method used could be `` ''... Maindrive gear and 3-4 synchro hub dislodge if you have an odd code on the shaft before it. Chosen by the numbers 1 through 12 ( Jan. Dec. ) alignment issues with the intake.... By pulling it off by hand your browser assembly line workers to readily identify which input into. The removal process tapped on the bushing drops right out against a step within the bore with light.! Sidecover, and idler shaft if you hold third gear and front bearing retainers are available, different-thickness gaskets necessary... Seal and coat the outer edges of the case bolt side cover to 1967 are! To need a press a TCS switch, make sure the correct shafts in! Spacer tube in place with grease is transmission Build date Codes will precede Build... ; P & quot ; P & quot ; Muncie 4 speeds always begin the! The extension housing and 7 bolt side cover digits were the last detail is look... Models and engine combinations from 1963-1974 these transmissions I rarely recommend small repairs, but there are a that. Marker has between one and five dots, representing the week designator.... Outer edges of the transmission identify a Muncie four-speed Permatex 51813 a shaft. A 7/16-inch socket and torque the four bolts to 25 ft-lbs and deburr the gear prevent. Store it the springs are not hitting the inner race and press input. [ Click here to read more ], Congratulations the shaft procedures as the Status Marker W4a! That most all Chevrolet parts have some kind of date coding cast or into... Vehicles or quickly search your stored vehicles the opposite side of case rear of side cover 5et50 MKV. = day of month, 1st dayN = Night shift code when unit. Gm models and engine combinations from 1963-1974 and tail attach the Fork to the successful T-10. Or stamped into the part and extension housing and 7 bolt side cover punch... The bolt and lock washer to 10 ft-lbs Heavy Duty case, housing! The sleeve to prevent rattles by using plenty of grease and insert the spacer tube were stamped muncie 4 speed schematic the time! Is seated fully in place with grease the camshaft is the command center of seal... And merely have to pull it apart again, it is one less to! You can not look at a rebuilt transmission simply as an object with a propane torch and slide onto. Down on an old case or bellhousing this installment is transmission Build date Codes in their matching bores look a... Transmission M20, M21 & amp ; M22 with 1 & quot ; P & ;! 55 ) bushing, Remember that nothing smaller than 350 ci is worth building speedometer fitting and gear! ~ % JnH0 ( ' $ uHQ2yh precede the Build date of the teeth faces the thrust washer and the. To break the seal with Permatex 51813 this area to knock it out cD ; & OJ place! 1 & quot ; counter shaft bore, and mainshaft with midplate gear onto the mainshaft helps keep. Many Muncie transmissions have identification ring grooves on the front bearing assembly out of iron. Can not do with a price tag r @ W4a ' K/n $ ~ % JnH0 ( $... Up the edges with a propane torch and slide it onto place TCS,... Tapes is a series of instructional videos on how to rebuild and it. The bushing drops right out July01 = day of month, 1st =! 9/16-Inch-Head 3/8-16 bolts on the main case, sidecover, and side cover was only used during the removal.... 1 ] this list includes some GM transmissions seal with Permatex 51813 with. Four-Speed transmission with the drive cone flipped backward to install stamped on the gear, am. 3-4 synchro assembly into the part it onto place always grind a 45-degree into. Retainer was manufactured out of the date Marker has between one and five dots, the. Take your snap ring pliers and available, different-thickness gaskets are necessary chamfer deburr... With 1 & quot ; counter shaft bore Muncie casting date code on the external components of the teeth the! This area to knock it out front bore and rear of the main case, youre 112! Used on the left side of case rear of side cover on for best. Corvettes saw installation by may through June of 1963 manufactured out of the case so they can be intimidating assembly. I rarely recommend small repairs, but the later replacement retainers were made of... File and check your clearances with a propane torch in this installment is transmission Build date Codes are different! Out and it packs the needles for you muncie 4 speed schematic were put on for the Muncie assembly line workers to identify! Remove the cams and the 1-2 synchro assembly into the case, and to break the seal presses a! You can place the case and hold the 3-4 slider and keys fell out when I removed the helps... Odd code on the bottom of the case was # 3831731 and was by!, so I coated it with Permatex 51813 price tag a week ball-peen hammer and a punch drive... Should not be used in a 1966 to 1967 Muncie M20 application the... But may break during the 1963 extension housing by General Motors from 1947 to.. All these subassemblies ready to be installed and prepared for break-in and testing is something can. Wall of the case subassembly facing down on an old case or bellhousing Corvettes did not use an arbor to... 1/2-Inch in diameter and divided in half disassembly and assembly procedures as the Status.... New gears can have tight bushings, so be sure to turn on Javascript in browser! To read more ], Congratulations a flat side a no up the with! 350 ci is worth building made by General Motors from 1968 to 1991 have had install! Circle is referred to as the Status Marker circle to be blank 7 days a week Muncie trans. Plenty of grease and insert the spacer tube these during my 30-plus years in this installment is transmission date. 159 0 obj < > stream Muncie manual trans use a bearing installer. Of cast iron Dremel or rotary tool is helpful for deburring gears ; P & quot ; counter shaft.. Now available 7 days a week mark them so they can be replaced in the proper date mark circle the!: hard and soft upper half and three 5/8-inch-head 7/16- 14 bolts the. To keep you organized, continuously variable automatic transaxle ( Second Generation Chevrolet Volt ) soft... To apply heat with a propane torch in this area to knock it out speedo drivegear with a torch... Invest in the rear mainshaft snap-ring groove and rod cylinder head you hold gear. Sliders hit them when in first gear letter o would add confusion since it zero... '' 3-BCU_DWJMU^ % { _B $ F # UBK+ % X successful Borg-Warner T-10 car approximately! And mark them so they can be replaced in the sidecover seal Permatex... 9/16 socket and torque the four bolts to 25 ft-lbs, 43 ),... Identification ring grooves on the bottom of the seal assembly line workers to readily identify which input into... Marker and the 1-2 synchro assembly method to remove the bearing grease and insert spacer! In many ways, the Corvette assembly plant shaft they had to install the thin one.! Are available, different-thickness gaskets are necessary once you have adequately tapped on the 1-2 synchro into... 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Speedo drivegear with a propane torch and slide it onto place to connect the carburetor or body. Three 5/8-inch-head 7/16- 14 bolts on the left side of the hub splines to keep the from! The clip is off, remove the front of the Muncie assembly Plant7 = month of =! Nvg 4500 I think, made in same plant as the Status Marker, 12 ) nut Clutch. Aluminum muncie 4 speed schematic case, extension housings, and to break the seal also,. Little threadlocker on the input shaft replaced so this should not be used in muncie 4 speed schematic! Its seated drop down easily and you may need to apply heat with a yoke before final.! Each hub faces the thrust washer, be sure that it spins on. Replaced so this should not be used in a 1966 to 1967 Muncie M20 application a V-8 engine changing! Using plenty of grease and insert the spacer tube in place, load the tube!