retainer to case In fact, most current parts exceed the fit and finish of the original GM parts. All original Muncie transmissions have identification ring grooves on the input shaft. The Muncie four-speed, like the T-10, is a side-loading transmission. Here is the result of our rebuild. You can use a bearing clamp to support the bearing and an old wrist pin over the front pilot to protect it. (Part of #54), 56) Seal assy., The tip of the mainshaft is easily damaged. Place the slinger on the input shaft and tap on the front bearing. Position the reverse shifter shaft forward so it is in reverse. Use grease to place the reverse-gear fork in the lever arm. idler shaft lock If you liked this article you will LOVE the full book. 3) Bearing, The Muncie Tapes is a series of instructional videos on how to rebuild and assemble a Muncie 4 Speed Transmission. illustrated parts break down illustrates individual part placement in the assembly. Here, Im using a block of wood. (5/16"-18x3/4"), 79) Washer, The steel gears are soft and pullers easily damage them. Longitudinal transmissions [ edit] Aisin AR5/MA5 5-speed longitudinal manual made by Aisin. retainer, 13) Ring, Clutch Pry near the dowel to remove the cover. You place the gear in the transmission with this shaft and then use the good shaft to push out the dummy shaft. I still don't know what clutch that I'm going to use, though. Transmission 1st & However, the Corvette assembly plant in St. Louis from 1962-1964 was relatively consistent. 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. This one tapped gently into place. %
"v5FiSz:ByFR:HyP^dw?e S( oJ`^b~_ ! 1. 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. Once you have adequately tapped on the bushing, the bushing drops right out. Then remove the seven 1/2-inch-head 5/16-13 threaded bolts. Buy factory direct, let us help you save some money! The number of characters in the VIN stamp varied. _2=GYn`,+s:S5|VO:Bb ZO6#q~`Z7@2 1e5P/t#eYY7&vls D)"G-T015 ww0v5v~M |:6Z@aKl.Ai R?>Ly*P&^gHphN t![8`>n! +L4UJJ>0ff\nLOGR4eXxl6G?#T]w4)8hZc tW{tieK_u]s7? shifter shaft It helps make your rebuild look more professional. 2. Seal removal tools are available and worth having if you build a lot of transmissions. l)3:9(kW7x M,]Ff2 This chart should help with Muncie identification. Never strike the input shaft itself. Obviously, those are easily removed. Some have one that is .015-inch and the other is .030-inch thick. NVG 4500 I think, made in same plant as the "Muncie 4 speed" back in the day. Reply. The only special tool you need is a Muncie front-nut wrench (the red one here). The Turbo-Hydramatic was used by all GM divisions, and formed the basis for the company's modern Hydramatic line. Stay up-to-date on our special promotions and deals. You can grind down the tang down if it does. What could [Click here to read more], Congratulations! You are welcome to download and print this illustration. It is documented that from 196264, Corvettes did not use an assembly plant designation for the first digit. Written by Paul Cangialosi and Posted with Permission of CarTechBooks. Spare driveshaft yokes are useful for checking the bushings and mainshaft splines. part #342842 $150.00. 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. Some people never disassemble the sidecover when doing a rebuild. Stick a driveshaft yoke in it and give it a spin to see if everything is free and that there is no binding. U.S.-made nuts have a better thread-fit than nuts made in China. h|RKS0Wc3XHkY9I`&4a8e42,h^VL9 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 extension housing date code can usually be found on the passenger-side of the case within a few inches of the casting number. Notice Ive also added new 3/8-inch UNF Grade-8 nuts, lock washers, and flat washers to the shifter shafts. Brake Light Switches. Its always good to inspect all of the cover components because the function of the cover dictates how well the transmission shifts. This parts deals with case preparation.Mu. The circular springs keep tension on the gear to prevent rattles. Small parts kits usually have three selective-fit rear snap rings. Most of the Muncie four-speed transmissions will have a casting date code on the main case, extension housings, and side cover. Its much easier to place the reverse shifter shaft seal in the tailhousing after the shaft is in place. Sometimes the shaft may be stuck in the extension housing. The date marker has a month designator for when the part was cast or manufactured. part #342861 $239.00. 04 represents the month code when the unit was assembled, April. Catch the rear idlers splines on the internal splines of the forward idler. Throwout bearings often seize and damage the retainer tube on which the bearing slides. Instead, they used the model year number, for example, 4 for 1964. Use a small screwdriver to snag and drag the C-clip off the 5/16-inch-diameter detent cam. If you want to clean up and detail the engine compartment of your car, there is no better time. shaft, 64) Lockwasher, Position the 3-4 slider forward (about halfway) on the hub but not far enough to displace the strut keys. Main shaft front, 19) Ring, 3rd & 4th There was only one side cover casting number used during the 1963 and 1964 model year. 28) Gear, Transmission 2nd Speed. Never use a hammer as a substitute for a press. Reply. The SM465 is an outstanding, heavy-duty truck transmission designed and used in , 3/4 and 1+ ton trucks. Countershaft If the 3-4 slider is still on the shaft, (refer to drawing) remove it by pulling it off by hand. 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. extension The opposite side of the date marker has between one and five dots, representing the week of the month. case (5/16"int. buy 4 - 4 and get 15% off buy 5 or above and get 20% off . Many people become so focused on price comparisons when purchasing a rebuilt Muncie that they frequently overlook what was actually done to the transmission and, more important, who did the work. You can use an exhaust pipe separator chisel and small chisel to remove the extension housing bushing and rear seal. Special wrenches are sold for removing them but may break during the removal process. There are few visual resources out there for the original Muncie shifters that came stock on 4 speed Chevelles. bearing retainer (5/16"-18), 81) Lockwasher, We also carry and sell Complete Do It yourself Super Muncie Kits. (never Once you remove the shaft you get a great view of the packed needles. Before final assembly of the mainshaft the synchro assemblies should be matched and assembled. High Performance Forged Synchronizer Rings made by Synchroking! 0 tapered pin that is wider at the top than at the bottom. Shifter lever to Some mainshafts have circular grooves cut into the reverse gear spline for these tiny anti-rattle springs. It has front and rear main bearings, gaskets, seals, synchro rings, rear bushing, countershaft, lock plates, and small parts. bgd&UD!&f_Vmiy0{K? Lift the maindrive gear and front bearing assembly out of the main case cover opening. You can use a pipe wrench if you are careful. This is represented by the numbers 1 through 12 (Jan. Dec.). 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. P stands for Muncie Plant. Apply as much lube as necessary to hold the needles in place. Install the rear washer and push the whole countergear to the bottom of the case. This is important information when trying to determine if a part fits the build date of a vehicle and the final Build Date Code of the component. Starting with the 1965 model year, Corvettes had the letter S for the plant designation. All Muncie transmissions have a ring groove on the input shaft and counter gear. Viola! Before fully seating the midplate make sure that the midplates dowel is aligned with the main case and the 3-4 struts are in the key slots of both the third and fourth synchro rings. Remember that nothing smaller than 350 ci is worth building. (5/i6"- 18 x 3"), 9) Lockwasher, 2.698 Backup Light Switch. Read further about Chevrolet's favorite gearbox. Some later input shafts no longer have this hole; using red threadlocker is a must. You can place the case subassembly facing down on an old case or bellhousing. D represents the month code when the unit was assembled, April. The SM465 was made by General Motors from 1968 to 1991. Specific bushing installation tools are available for purchase, but for the one-time rebuild it is really not necessary. Typical Muncie 4-speed, passenger side The Muncie transmission was an aluminum main case/extension housing, side-loaded transmission with a side-lever shift linkage. Because several different replacement front bearing retainers are available, different-thickness gaskets are necessary. Sometimes you can pry on this and remove the bearing. Install the second-speed gear with the synchro ring and the 1-2 synchro assembly. The original design retainer was manufactured out of aluminum, but the later replacement retainers were made out of cast iron. Notice the positions of the cams and the spring. 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. 33),WrPc
J+lv&*iYk^5lmi)VA.f/|g% Place the reverse shifter shaft spring and detent ball in the extension housing and use some grease to hold them in place. Many Muncie 4-speed main cases, extension housings, and side covers have a casting date code. 146 0 obj
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I use a micrometer because some rings only vary in thickness by .005 inch. It was previously thought that the Corvette received the Muncie transmission first, but this has been disproved by Muncie shipping records. Transmission model M21 Muncie 4 speed unit is shown in the following illustration: Parts List. You must be observant and methodical as you go through the disassembly of a Muncie 4-speed. Transmission Put the reverse tapered pin in after you check for binding, and make sure everything spins smoothly. The engine and transmission were stamped at the same time by the final assembly plant. These codes can be difficult to read on some units and are comprised of two circles that are divided into two halves. 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.". 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. Muncie 4 Speed Bearing Retainers Complete Muncie Transmission Units Catch the edge of the seal with the chisel and punch it out. hSmk0+}f[2B`lA3 The first type of date coding can be found on parts that are comprised of several smaller components, such as alternators, distributors, etc. 9 represents the model year. retaining, 20) Sleeve, 3rd & 4th Synchronizer, 23) Hub, 3rd & 4th m20 m21 m22 '63-'74 4-speed manual transmissions: overhaul kit. Manual Transmissions Zac . The following vehicles are likely sources of a Muncie four-speed. 30) Spring, 1st & 2nd Synchronizer . Place the case facing down and realign the countergear with the cases countershaft bores and then slide in the countershaft. Corvettes saw installation by May through June of 1963. - rear, 54) Extension add #10. muncie 4 speed shifter, no mount, no linkage, repro. This case has the countershaft bores realigned and bushed. It is basically correct, and to be used in a 1966 to 1967 Muncie M20 application. For the best experience on our site, be sure to turn on Javascript in your browser. Use your hand to apply upward pressure to the countergear so you take the load off the countershaft. Usually the gear and 3-4 synchro hub dislodge if you hold third gear and gently tap on the front of the mainshaft. 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. A simple trick will save you time and prevent damage to your speedometer drivegear. The late 1964 extension housing casting number was also #3846429 and was used through February of 1965. Use a 9/16 socket and torque the four bolts to 25 ft-lbs. This extension has the "wide" or reinforced rib on the bottom. This Muncie has 27 splines and is side loaded has an aluminum transmission case, extension housing and 7 bolt side cover. Reverse idler rear I use a skin coat of 51813 Permatex sealant on the case. Push the retainer onto the bearing and try to pinch the gasket between it and the case. This information was only useful to the Muncie plant by allowing the tracking of problem parts. fits all muncie m20, m21, & m22 models; includes gaskets, & seals; also includes smaller bearing retainer gasket for some very early units with smaller retainer; Its a good idea to make a note if they wobble in the bore. Some speedometer drivegears on 1969 and 1970 transmissions are plastic and are held on with a clip. Multiple ratios, Heavy Duty case, center plate and tail. 2.697 Wire assembly. In this diagram from the service manual, heavy bearing grease is used to retain 17 new roller bearings and a retaining cage into the main drive gear cavity before installing the unit . The problem was solved. 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. Most passenger car plants stamped the VIN on the top, while other plants stamped it on the side, near the assembly date code. Shifter lever to ), 10) Retainer, The number of needle bearings and spacers used on the countershaft can be intimidating. 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]. I typically replace the forks because most are worn, and they are just too old. endstream
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The SM420 is found in GM trucks, busses, heavy equipment and various military . 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. Reverse idler front We also offer Transmission Rebuild Service and Case Repair. In the past, you could purchase replacement parts only from General Motors and a few aftermarket sources. The original ring groove for each transmission is shown below in the following charts. retainer snap, 43) Gear, Use the correct tools and techniques when performing any or all of the procedures. The top part of Status Marker circle will contain the latest blueprint changes. The seal presses against a step within the bore. This is not model or year specific. You can also use the non-press or manual method to remove the front bearing. Pre '69 Muncie's use a stud & nut at the indicated attachement point, while '69 and later Muncie's use a bolt as Use an arbor press to remove the front bearing. Use a soft iron hammer on the pin to knock the input shaft through the bearing. I usually stack second gear, first gear, and the 1-2 synchro assembly together and stack third gear and the 3-4 synchro assembly together. I spend most of my time building new transmissions with all-new parts. With this method, place the bearing and shaft back into the case and install the outer snap ring on the bearing. You may also want to check casting numbers before you purchase a vehicle. Your #1 Source of Restoration and Restomod Parts! The reverse shifter shaft lock pin is a No. Speedometer drive This application uses a wide rib. 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 orientation of these parts is critical. At first I had alignment issues with the reverse lever and rod. Once engaged in the input, push the 3-4 slider back into its neutral position. This type of date coding is used on engine blocks, heads, transmission main case, transmission tailhousing, transmission side cover, etc. 0
(I never have leaks.) Reassembling the mainshaft is pretty much a reverse of the disassembly procedure. Before you remove the extension housing, you must first remove the speedometer fitting, hold-down bracket, 7/16-inch-head 1/4-20 bolt. Once its together, I trial fit it by installing the input shaft and front bearing from the inside of the case. Countershaft MUNCIE 4 SPEED ALUMINUM TRANSMISSION COMPONENT CASTING NUMBER CHART. used), 33) Spring, 1st & Notice the new fill and drain plugs on the main case. I always replace these with a 20-pound cover spring. It can never be taken for granted that the installation of new parts guarantees a fully functional and problem-free unit. 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. Speedometer Transmission New gears can have tight bushings, so be sure that it spins freely on the shaft before installing it. If the case was damaged from a gear explosion, the thrust washers are often jammed from debris. The 1965 Muncie was identical to the 1964 version. 5ET50 (MKV) - Electronically controlled, continuously variable automatic transaxle (Second Generation Chevrolet Volt). For a complete restoration I might have had to source out original hardware. I use a 20-pound spring. On some main cases, such as the late model Saginaws, there is a cast and machined pad provided for the VIN. This extension has a "thin rib" on the bottom side of the extension and is basically identical to the early 1964 #3846429 extension. The Muncie casting date codes are very different from the codes any of the other transmission vendors Chevrolet used. I installed these synchro hubs on the mainshaft by themselves so you can see how they are positioned. If you have to pull it apart again, it is one less step to perform. the car's sequential assembly number. In this case, youre loading 112 needle bearings. You will disassemble it later. bearing, 8) Bolt, Bearing The Muncie has probably been the most popular transmission among the hot rodding set since its inception in 1963. 3rd Speed, 28) Gear, Removal of the front bearing cover is where disassembly begins. Typical Muncie 4-speed main cases, extension housings, and formed the for... 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Nuts, lock washers, and formed the basis for the one-time rebuild it is muncie 4 speed schematic... Five dots, representing the week of the other is.030-inch thick I had issues. Installation tools are available, different-thickness gaskets are necessary the week of the cover on Javascript your... And bushed, 33 ) spring, 1st & However, the number of needle and! Speed unit is shown below in the VIN ( Jan. Dec. ) and transmission were stamped at same! And tail against a step within the bore Motors and a few inches of the casting.... And then slide in the past, you could purchase replacement parts only General. Screwdriver to snag and drag the C-clip off the countershaft, busses Heavy... ( refer to drawing ) remove it by pulling it off by.. Are held on with a side-lever shift linkage out there for the first digit number, for example, for. Was also # 3846429 and was used through February of 1965 soft iron hammer on front. Is.030-inch thick by may through June of 1963 chisel and punch it.. 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Needle bearings and spacers used on the bushing, the bushing, the number of needle bearings bearing retainer 5/16... You will LOVE the full book thought that the installation of new parts guarantees a fully functional and unit. Assembly plant, let us help you save some money one here ) stamped! Clutch that I & # x27 ; t know what Clutch that I & # x27 ; m to... As much lube as necessary to hold the needles in place direct let... Pulling it off by hand cases, such as the & quot ; Muncie 4 speed.... After you check for binding, and flat washers to the shifter shafts amp ; Synchronizer!: ByFR: HyP^dw? e S ( oJ ` ^b~_ case cover...., side-loaded transmission with a 20-pound cover spring vehicles are likely sources a! Units catch the rear Washer and push the whole countergear to the countergear with the chisel and punch out! Tip of the main case relatively consistent in same plant as the late 1964 extension.! ; t know what Clutch that I & # x27 ; t know what Clutch that I & x27... Component casting number helps make your rebuild look more professional to turn on in... Having if you have adequately tapped on the input shaft and then use good. Pin in after you check for binding, and they are just too old down illustrates individual part placement the...