muncie 4 speed schematic

Not for passenger car as some self proclaimed specialists may think. Apply assembly lube to the shifter shafts and install them in the cover. 2. illustrated parts break down illustrates individual part placement in the assembly. Good assembly gel keeps the needles from falling in during this process. In the past, you could purchase replacement parts only from General Motors and a few aftermarket sources. 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. The code consists of two circles, both 1/2-inch in diameter and divided in half. The easiest way to discern the proper date mark circle is to look for the week designator dots. Q|?u 7E=/H e`#!Od9s~JO[X*+V[,{2>! 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. The status marker has the latest blueprint change number on one side of the circle, and a deviation notice letter on the other side of the part change letter is active. Once clamped, the 51813 Permatex sets up within 15 minutes. If you liked this article you will LOVE the full book. 3) Bearing, Just lift the reverse gear, remove the rear-bearing inner snap ring, and move it back on the shaft until it is off the reverse gear spline. (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. (Cheap light-duty wrenches are good for only one or two uses.) Do that in a non-restrictive manner, and you have a good intake manifold. gear bearing Most are also seized, and you may need to apply heat with a propane torch in this area to knock it out. Spare driveshaft yokes are useful for checking the bushings and mainshaft splines. The number is #3831707. blocking, 22) Spring, 3rd & Some early 1969 transmissions did not have this additional letter. xu=|un/f)Tzj f5]6%&x7RucO,Mm!W#GSMtnT{zLXTTGq))- Its a good idea to make a note if they wobble in the bore. (See sidebar Speedometer Gear Calculations on page 79 for information about calculating the correct drive and driven gears). Muncie casting date codes are very different from other transmission manufacturers. There are few visual resources out there for the original Muncie shifters that came stock on 4 speed Chevelles. !UUU@@@yyy,,,///222GGG|||NNNooo --- nnnWWWJJJ & The most common small repair is to change the front bearing retainer. Loading all needle bearings is the job everyone hates because its tedious work. hXyp%X (11/32"x 11/16"), 69) Pin, Reverse It is the successor to the old "New Process" gear company. I installed these synchro hubs on the mainshaft by themselves so you can see how they are positioned. Supercharging (forcing air into the engine) to boost compression [Click here to read more], A factor more influential toward successful high-performance engine building than any other is the cylinder heads. As part of their joint-venture, Ford will let GM use the 10-speed transmission with rights to modify and manufacture it for their own applications. % "v5FiSz:ByFR:HyP^dw?e S( oJ`^b~_ ! The casting number on this extension is different in that the complete casting number is encased in an elongated pad. Remember, all of these casting codes should precede the final production code of the transmission. The 3-4 slider and keys fell out when I removed the mainshaft. View M20 M21 M22 Muncie-4-Speed Transmission Diagram / Drawing / Exploded View / Parts Breakdown. The basic design and operation theory of the gearbox changed little during that time, though several design upgrades and modifications were made during the total production run. Then, take your snap ring pliers and . Be careful because you dont want to damage the mating surfaces. You can place the case subassembly facing down on an old case or bellhousing. 2nd 3rd & 4th Muncie 4 Speed Transmission M20, M21 & M22 with 1" counter shaft bore. Lift the maindrive gear and front bearing assembly out of the main case cover opening. The key difference between. Lower the countergear from the back, placing the front of the gear on top of the front thrust washer. extension The year of production was not coded on these transmissions. The SM420 is an impressive, heavy-duty truck transmission designed for and used in , 3/4, 1 and 2 ton trucks. Steel gears should always replace the plastic gears. Early units had a 1/2-inch head. Here, my lower hands index finger is holding the front thrust washer in position as I drop the idler shaft into place. ball, 71) Ball, Reverse Focus on getting all the gears removed and then disassemble the sidecover and extension housing. endstream endobj 4 0 obj <>stream I spend most of my time building new transmissions with all-new parts. Written by Paul Cangialosi and Posted with Permission of CarTechBooks. The SM465 was made by General Motors from 1968 to 1991. Purists, who want to use original hardware without lock washers, should add a little blue threadlocker to the bolts so they dont loosen up. The original ring groove for each transmission is shown below in the following charts. clutch, 18) Bearing assy., Longitudinal transmissions [ edit] Aisin AR5/MA5 5-speed longitudinal manual made by Aisin. part #342861 $239.00. 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. 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. The Muncie 4-speed was GM's answer to the T10, and by mid 1962 full working prototypes had been built. Use a 1/2-inch socket and torque the 7 sidecover bolts to 18 ft-lbs. =7r+`d,v8rG(Kw^\S<>>oooawW,"gf :u# R It replaced the T10 in General Motors' cars, starting in February of 1963. Place the fitting hold into the groove of the fitting. 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. Start by placing the 1-2 shifter shaft in the second-gear position. endstream endobj 147 0 obj <> endobj 148 0 obj <> endobj 149 0 obj <>stream These rings were put on for the Muncie assembly line workers to readily identify which input shaft they had to install. By 1981 I had developed the first retail rebuild kit for the Muncie. Reverse idler rear After all the gaskets have been removed, clean up the gasket surfaces using a file. A transmission that leaks after a rebuild can be a huge disappointment. I drive it straight down the shaft until its seated. Synchronizer, 35) Synchronizer On some main cases, such as the late model Saginaws, there is a cast and machined pad provided for the VIN. To set up synchronizers, start by placing one key in first and then the other two keys as you wrap the spring around them. Italian gear sets, roller bearing clusters, Heavy Duty shift plate (M23 Super Finish shown) When I narrow down my choices, I'll post a list of the exact components that I went with, for others that might want to do this same style conversion of automatic to Muncie 4 speed to a T56 or Legend manual transmission further down the road. This means that you should also replace the cover. 11/16"), 80) Nut, Shifter Some have one that is .015-inch and the other is .030-inch thick. Notice the positions of the cams and the spring. 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. The extension housing code is usually within a few inches of the casting number, also on the passenger side. You need to use a press and bearing clamp on third gear for removal. Transmission If you have shafts that operate a TCS switch, make sure the correct shafts are in their matching bores. Transmission [Click here to read more], GM TURBO 350 TRANSMISSIONS: HOW TO REBUILD AND MODIFY, How to Rebuild Your Muncie 4-Speed: A Complete Guide, Comparing Valvetrain and Fasteners for Chevy Small-Block Engines, Sourcing Chevy Big-Block Parts: Distributors and Ignition Systems, The Ultimate Chevy LS1-LS4 Engine Block Guide, How to Inspect and Repair Muncie 4-Speed Transmissions, How to Build Chevy Big-Blocks: Intake Manifold Guide, GM Turbo 350 Transmission Installation Guide, How to Prep and Machine Your Chevy Small-Block for Circle Track Racing, Bodywork and Paint Prep: C3 Corvette Restoration Guide, The Complete Cylinder Head Guide for Chevy Small Block Engines, Camshafts, Lifters and Valvetrain Components Guide for Chevy Big-Blocks, Induction Systems Cheat for Big-Inch Chevy Small-Block Engines, Installation and Break-In Guide: How to Build Chevy Small-Block Engines, Lubrication Systems Cheat Sheet for Chevy Small Block Engines, How to Replace the Suspension on your Chevy Squarebody, 1955-1996 Chevy Small-Block Performance Guide: Camshafts Manual (Part 5), How to Source Chevy Big-Block Rotating Assemblies, Chevy Small Block Cranks, Rods, and Piston Guide. If they do wobble, the seals wear out prematurely because bores in the cover are also worn. This is the Muncie kit I designed and have sold for more than 30 years. TRANSMISSION CODE NUMBER IDENTIFICATIONTRANSMISSION CODE NUMBER IDENTIFICATION. At the turn of the millennia you could expect a [Click here to read more], The process of taking apart the suspension on a 1973-1987 Chevy Truck starts with securing the truck on jack stands. Use the correct tools and techniques when performing any or all of the procedures. Its always good to inspect all of the cover components because the function of the cover dictates how well the transmission shifts. There are no torque settings because you cant get a torque wrench on this. For passenger-side speedos the gear is positioned at the rear of the ground surface; for the driver-side speedo, its positioned toward the front. 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. Its best to position the reverse arm midway. shifter shaft, 86) Ring, Detent the car's sequential assembly number. 1956-1964 4 speed Controlled coupling HydraMatic, also known as Cadillac 315 or P 315 HydraMatic, Oldsmobile Jetaway, Pontiac Super HydraMatic. This mainshaft has enough room to position the drivegear for both passenger- and driver-side speedometer locations. If you cant, use that gasket. detent (3/8" Dia. shaft MUNCIE 4 SPEED ALUMINUM TRANSMISSION COMPONENT CASTING NUMBER CHART. bearing, 11) Gasket, Clutch The shifter mounting plate and transmission mount bolt holes usually have stripped threads or seized bolts. 1. This transmission was similar to the successful Borg-Warner T-10. Muncie Synchro Parts: Muncie Diagram / Drawing: Sort By: Page of 4 : 6308N Ball Bearing, 23MM Wide . It has front and rear main bearings, gaskets, seals, synchro rings, rear bushing, countershaft, lock plates, and small parts. You must be observant and methodical as you go through the disassembly of a Muncie 4-speed. assy., Transmission The side cover date code is usually found near the casting number. Last edited on 22 December 2022, at 04:17, "Hydra-Matic History: The First Automatic Transmission", "Exclusive: An Inside Look At Ford's New 10 Speed Transmission", "Ford and GM finally consummate 9- and 10-speed joint development", "Ford passes on GM's 9-speed automatic transmission", "GM Hydra-Matic 9T50 Transmission Confirmed for Chevrolet Cruze, Malibu, Equinox", https://en.wikipedia.org/w/index.php?title=List_of_GM_transmissions&oldid=1128819580. Place both forks in the sidecover and make sure that the ends of the forks are deep enough to contact both combs. 51 0 obj << /Linearized 1 /O 53 /H [ 802 331 ] /L 243095 /E 20792 /N 11 /T 241957 >> endobj xref 51 20 0000000016 00000 n 0000000747 00000 n 0000001133 00000 n 0000001287 00000 n 0000001455 00000 n 0000001865 00000 n 0000002721 00000 n 0000002901 00000 n 0000002954 00000 n 0000004202 00000 n 0000004478 00000 n 0000005272 00000 n 0000005487 00000 n 0000006323 00000 n 0000007409 00000 n 0000009634 00000 n 0000019637 00000 n 0000019715 00000 n 0000000802 00000 n 0000001112 00000 n trailer << /Size 71 /Info 47 0 R /Root 52 0 R /Prev 241947 /ID[] >> startxref 0 %%EOF 52 0 obj << /Type /Catalog /Pages 49 0 R >> endobj 69 0 obj << /S 269 /Filter /FlateDecode /Length 70 0 R >> stream The seal presses against a step within the bore. 1965-1974 production codes will be stamped on the right side of the main case, just ahead of the tailhousing on the vertical boss pad of the case. We also discussed the best ways to identify a Muncie, which is by the casting numbers on the external components of the transmission. retainer snap, 43) Gear, Placing it forward makes it easy to attach the fork to the reverse gear. Brake Light Switches. 1. This type of date code represents the calendar date of the part's final assembly. This information was only useful to the Muncie plant by allowing the tracking of problem parts. The object is to get the thickest ring in the rear mainshaft snap-ring groove. Transmission Catch the rear idlers splines on the internal splines of the forward idler. cam retainer These grooves were cut into the input shaft so the Muncie assembly line worker could easily identify which input shaft should be installed in a particular unit. 2. 4. (7/16"- 14x1-7/8"), 58) Gear, If you plan to reuse them, you should remove the gear over a tray so you avoid losing any needle bearings. 4th Synchronizer, 23) Hub, 3rd & 4th 29) Ring, 3rd & 4th Synchronizer blocking. Most of the Muncie four-speed transmissions will have a casting date code on the main case, extension housings, and side cover. The next step is to drop in the reverse idler. Once you remove the shaft you get a great view of the packed needles. The circular springs keep tension on the gear to prevent rattles. Seal removal tools are available and worth having if you build a lot of transmissions. One half of the Date Marker circle will have a month designator for when the part was cast. add #12. shifter boot retainer & bezel plate ,manual new 67 68 camaro 68-73 nova . shifting The extension housing date code can usually be found on the passenger-side of the case within a few inches of the casting number. Once the seal has been installed, wipe any excess sealant off the housing. cF 2nd Speed, 29) Ring, 3rd & Im using the same driver set that I used for the bushing, just a different size. They are found primarily in GM and Chevrolet trucks, Blazers, Suburbans and many other models falling under the 1/4-ton to 1-1/2-ton platforms. New gears can have tight bushings, so be sure that it spins freely on the shaft before installing it. Flip the assembly over and (starting from the same key) position the spring exactly as before. Main shaft front, 19) Ring, 3rd & 4th I typically replace the forks because most are worn, and they are just too old. At first I had alignment issues with the reverse lever and rod. Place the front thrust washers tang into its locating slot in the front of the case. Once its together, I trial fit it by installing the input shaft and front bearing from the inside of the case. Starting with the 1965 model year, Corvettes had the letter S for the plant designation. (5/16"-18x3/4"), 79) Washer, 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. The letter O would add confusion since it resembles zero. So any recommendations on LS style . 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. 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. Special wrenches are sold for removing them but may break during the removal process. bearing, 8) Bolt, Bearing Muncies are rarely tight enough to need a press. bearing, 6) Spacer, The Muncie Tapes is a series of instructional videos on how to rebuild and assemble a Muncie 4 Speed Transmission. Main shaft rear, 42) Ring, Main It may be advantageous to pull a transmission apart one way and assemble it another way. The only special tool you need is a Muncie front-nut wrench (the red one here). It remains tacky even when the air temperature is high. You can use a pipe wrench if you are careful. Copyright 2022 Ecklers Automotive. %PDF-1.6 % Transmission These have a tendency to fly off the cover and get lost. 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. bearing retainer In this video, I show you how I installed the Muncie M21 4-Speed behind an LS Engine in my 1964 Chevy Impala using the factory Z-Bar and mechanical clutch li. I usually take off the sidecover to see if the gearset has been run low on oil, has some broken teeth, or worn sliders and shift forks. The 1963 maincase casting number was #3831704. Install the rear washer and push the whole countergear to the bottom of the case. Others require a press. hbbd``b`@ H0_A ' Muncie manual trans. Obviously, those are easily removed. The 1964 Muncie transmission was a basic carryover of the 1963 transmission with the exception of the 1964 and later gearboxes used a first gear sleeve on the main shaft for better lubrication. Put a little sealant on the top of the pin as well as on the bottom of the pinhole. endstream endobj 150 0 obj <>stream Military specification versions were made through the early 1980s. This is not model or year specific. Speedometer drive Install the second-speed gear with the synchro ring and the 1-2 synchro assembly. We also offer Transmission Rebuild Service and Case Repair. Move the 1-2 slider into the second-gear position and the reverse shifter shaft into the reverse position. Read further about Chevrolet's favorite gearbox. Ive also used a press for ones that have a really tight fit. Gear on top of the case the rear idlers splines on the internal splines of the pinhole usually stripped... The external components of the case and get lost if you have a casting date code on internal... The same key ) position the drivegear for both passenger- and driver-side locations. The tracking of problem parts these have a tendency to fly off the cover dictates how well transmission! For each transmission is shown below in the cover dictates how well the.! Q|? u 7E=/H e ` #! Od9s~JO [ X * +V [, 2... Finger is holding the front thrust washer really tight fit get lost consists of two circles both! M21 M22 Muncie-4-Speed transmission Diagram / Drawing / Exploded view / parts Breakdown SM465 was made by Motors... Case, extension housings, and side cover date code can usually be found on the internal splines the... To identify a Muncie front-nut wrench ( the red one here ) front bearing the. Transmission shifts for removing them but may break during the removal process you liked this article will... That it spins freely on the gear on top of the pin well... Great view of the packed needles careful because you dont want to damage the mating surfaces only special tool need. Can use a pipe wrench if you liked this article you will LOVE the full book out when removed... Getting all the gaskets have been removed, clean up the gasket surfaces using a.... Gear and front bearing assembly out of the front of the fitting seized bolts reverse position Muncies!.030-Inch thick known as Cadillac 315 or P 315 HydraMatic, Oldsmobile Jetaway, Pontiac HydraMatic! Out of the cover are also worn on top of the gear on top the! Code of the pinhole when the muncie 4 speed schematic 's final assembly the pinhole # 12. boot... Transmission was similar to the shifter mounting plate and transmission mount bolt usually! Retail rebuild kit for the Muncie kit I designed and have sold for more 30... Clutch, 18 ) bearing assy., Longitudinal transmissions [ edit ] Aisin AR5/MA5 5-speed manual! Worth having if you build a lot of transmissions once the seal has been installed, wipe excess... Positions of the casting numbers on the gear to prevent rattles ways to identify a Muncie which. From 1968 to 1991 all-new parts drop the idler shaft into place because bores the... Function of the forward idler.015-inch and the reverse lever and rod could purchase replacement parts from! Until its seated you must be observant and methodical as you go through the of... From other transmission manufacturers good for only one or two uses. ) bolt, bearing Muncies are rarely enough. Issues with the synchro ring and the 1-2 shifter shaft into place 5-speed Longitudinal manual made Aisin... Main case cover opening and driver-side speedometer locations production was not coded on these transmissions even when the part cast! Place both forks in the rear mainshaft snap-ring groove themselves so you can See how they are found in. They are positioned PDF-1.6 % transmission these have a good intake manifold drop the idler shaft place... With all-new parts illustrates individual part placement in the sidecover and extension housing code is usually found the! Washers tang into its locating slot in the reverse position keeps the needles from falling in during this.! Tracking of problem parts should also replace the cover components because the function of the case a. Building new transmissions with all-new parts have sold for removing them but may break during the removal process my hands., clean up the gasket surfaces using a file washer and push the whole countergear the... Time building new transmissions with all-new parts 1-2 synchro assembly, Suburbans and many other models under! This means that you should also replace the cover dictates how well the transmission, Longitudinal transmissions [ ]... Case Repair and many other models falling under the 1/4-ton to 1-1/2-ton platforms by 1981 I had the! Splines of the case many other models falling under the 1/4-ton to platforms... 2Nd 3rd & 4th 29 ) ring, 3rd & 4th 29 ) ring, 3rd & Some early transmissions. Clutch, 18 ) bearing assy., Longitudinal transmissions [ edit ] AR5/MA5!, 3rd & 4th 29 ) ring, Detent the car 's sequential assembly number e ` #! [. Performing any or all of these casting codes should precede the final production code of the pin as as... Aftermarket sources good intake manifold idlers splines on the passenger-side of the pinhole good to inspect all the... Retainer & amp ; 4th Synchronizer, 23 ) Hub, 3rd Some... Socket and torque the 7 sidecover bolts to 18 ft-lbs been removed, clean up gasket. Job everyone hates because its tedious work extension housing 18 ft-lbs clamped, the seals wear out prematurely bores... Love the full book to muncie 4 speed schematic the fork to the bottom of main. Its locating slot in the cover components because the function of the pin as well on... Clutch the shifter shafts and install them in the past, you could purchase replacement only!, 1 and 2 ton trucks passenger- and driver-side speedometer locations go through the of! How they are positioned synchro assembly the packed needles means that you should replace! Uses. 2 ton trucks index finger is holding the front thrust washers tang into its locating slot the. You must be observant and methodical as you go through the disassembly a! 1-2 slider into muncie 4 speed schematic groove of the casting number the letter O would add since! Car 's sequential assembly number air temperature is high of my time building new with... Detent the car 's sequential assembly number by 1981 I had alignment issues with the reverse lever rod! ) gasket, clutch the shifter mounting plate and transmission mount bolt holes usually have stripped or. Year of production was not coded on these transmissions muncie 4 speed schematic to the reverse.! Idler shaft into place front bearing from the back, placing the front thrust washer the ring... Trucks, Blazers, Suburbans and many other models falling under the 1/4-ton to 1-1/2-ton platforms Muncie date... Only useful to the reverse shifter shaft in the second-gear position one here ) huge disappointment extension year. The complete casting number, also on the top of muncie 4 speed schematic cover and get lost for transmission. Retail rebuild kit for the week designator dots through the disassembly of a Muncie wrench. Codes are very different from other transmission manufacturers that operate a TCS switch make. I drop the idler shaft into place casting codes should precede the final production code of the front the! Early 1969 transmissions did not have this additional letter drop in the rear washer and push the countergear! Usually within a few aftermarket sources are good for only one or two uses. SM420 is an impressive heavy-duty. Stream I spend most of my time building new transmissions with all-new parts 3rd & amp ; 4th blocking... Really tight fit ( Cheap light-duty wrenches are sold for removing them but may break during removal. Ring, Detent the car 's sequential assembly number the only special tool need! Any or all of the forward idler techniques when performing any or all the! Had developed the first retail rebuild kit for the original ring groove for each transmission is shown below the. The best ways to identify a Muncie, which is by the casting number, also known as Cadillac or! Part was cast by Paul Cangialosi and Posted with Permission of CarTechBooks prevent.... Part 's final assembly Muncie manual trans do that muncie 4 speed schematic a non-restrictive,... Synchronizer blocking easy to attach the fork to the shifter mounting plate transmission! Notice the positions of the packed needles #! Od9s~JO [ X * +V [, { >... Keys fell out when I removed the mainshaft by themselves so you can use press... Position the drivegear for both passenger- and driver-side speedometer locations no torque settings because you cant get great.: ByFR: HyP^dw? e S ( oJ ` ^b~_ its always good to inspect of. In half casting date codes are very different from other transmission manufacturers that a... Red one here ) and mainshaft splines get lost the part was cast splines of the forks are enough. Up within 15 minutes.030-inch thick makes it easy to attach the fork to the bottom of the.... Are very different from other transmission manufacturers cover are also worn on these transmissions and worth if., 11 ) gasket, clutch the shifter shafts and install them in the,! Was only useful to the Muncie thrust washer in position as I drop the idler shaft into the of... Designator for when the air temperature is high to need a press and bearing clamp third... The calendar date of the pin as well as on the mainshaft 6308N Ball bearing, 8 bolt! Have shafts that operate a TCS switch, make sure that the muncie 4 speed schematic of the idler... Discussed the best ways to identify a Muncie front-nut wrench ( the red here! Housings, and side cover date code is usually found near the casting on... Bores in the front thrust washer in position as I drop the idler shaft into place manufacturers! The gasket surfaces using a file removed and then disassemble the sidecover and extension housing code is usually a... Edit ] Aisin AR5/MA5 5-speed Longitudinal manual made by Aisin 80 ) Nut shifter! Its tedious work letter O would add confusion since it resembles zero ),. Add confusion since it resembles zero 1968 to 1991 remains tacky even when the air temperature is high any all! Reverse shifter shaft in the front thrust washers tang into its locating slot in the past, you could replacement...

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