muncie 4 speed schematicmuncie 4 speed schematic

If you plan to reuse them, you should remove the gear over a tray so you avoid losing any needle bearings. Most are also seized, and you may need to apply heat with a propane torch in this area to knock it out. Be careful not to go too far or the ball pops out. %%EOF (5/16"-18x3/4"), 79) Washer, 3. endstream endobj 3 0 obj <>stream 1. 146 0 obj <> endobj gaskets & seals . Posted in Corvette, C1 1953-62, Technical, C2 1963-67, Technical, C3 1968-82 and Technical. If you can, install the thicker one. The next step is to drop in the reverse idler. The sidecover alignment dowel is located below the upper right bolt. Let me explain. Lift the countergear out of the case. Shifter lever to 2. This information was only useful to the Muncie plant by allowing the tracking of problem parts. q )A :l 4}3vNSK{^ %cD;&OJ! ** The #3846429 extension was manufactured in two versions, a "thin rib" and a "wide rib". There are few visual resources out there for the original Muncie shifters that came stock on 4 speed Chevelles. endstream endobj 147 0 obj <> endobj 148 0 obj <> endobj 149 0 obj <>stream You never want to hammer hard on this sleeve because you can spread the end and cause first gear to bind on it. (I never have leaks.) 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. Not for passenger car as some self proclaimed specialists may think. idler shaft lock Loading all needle bearings is the job everyone hates because its tedious work. 1967-1974 production codes will start with the letter P and have five numbers, for example: P9D09. Transmission 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. muncie. The extension housing code is usually within a few inches of the casting number, also on the passenger side. . It helps make your rebuild look more professional. Muncie M20 4-speed longitudinal wide ratio manual transmission made by GM at their Muncie, Indiana factory. Of the regular production codes, one particular Muncie 4-speed type appears. Some sets have two .015-inch gaskets that can be stacked. 1969-1974 production codes may contain an additional letter, for example: P9D09A. It was based on the T10 design, and I have been told that BorgWarner engineers helped design it. 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. There are no torque settings because you cant get a torque wrench on this. A transmission that leaks after a rebuild can be a huge disappointment. You can pull the shaft out of the back of the case, and then safely store it. Ive also used a press for ones that have a really tight fit. Pull both the 3-4 and 1-2 forks out of the sidecover. You must be observant and methodical as you go through the disassembly of a Muncie 4-speed. (Part of #25-35), 48) Washer, assy., Transmission, 55) Bushing, % "v5FiSz:ByFR:HyP^dw?e S( oJ`^b~_ ! It replaced the T10 in General Motors' cars, starting in February of 1963. extension oil, 57) Bolt, Extension reverse shifter, 63) Lever, locating, 16) Gasket, Rear All rights reserved. Put the reverse tapered pin in after you check for binding, and make sure everything spins smoothly. Sometimes you do find a transmission with original gears that are in great shape. Here is the result of our rebuild. The engine and transmission were stamped at the same time by the final assembly plant. New combs are harder and much better than the older ones. 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.". 30) Spring, 1st & 2nd Synchronizer . Before installing a new bushing, file down the high spots where the bushing is joined together. If you are going to change a 45-year-old front bearing it is in your best interest to change all the bearings. 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. It is advantageous to have access to a hydraulic press before disassembling a mainshaft. In the past, you could purchase replacement parts only from General Motors and a few aftermarket sources. 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. However, many people misunderstand what really constitutes a complete rebuild. 28) Gear, Transmission 2nd Speed. Wipe away any excess sealant. Quality parts guaranteed! 2. I use the case to support the cover when I press in the sidecover seals with a 17-mm socket. I use an assembly lube specifically for transmissions. Before final assembly of the mainshaft the synchro assemblies should be matched and assembled. High Performance Forged Synchronizer Rings made by Synchroking! In this case, youre loading 112 needle bearings. Good assembly gel keeps the needles from falling in during this process. Because of the age of these transmissions I rarely recommend small repairs, but there are a couple that are reasonable. Muncie 1965-72 1965-68 Pontiac 1966-72 "A" . The 1965 Muncie was identical to the 1964 version. Place the slinger on the input shaft and tap on the front bearing. It can be acceptable for the Status Marker circle to be blank. Shifter lever to The seal presses against a step within the bore. add #12. shifter boot retainer & bezel plate ,manual new 67 68 camaro 68-73 nova . From the left, the subassemblies are the tail section, main case, sidecover, and mainshaft with midplate. If you dont have a micrometer you can try to fit the ring by eye. Placing it forward makes it easy to attach the fork to the reverse gear. Flip the driver upside down and gently tap in the seal until it is seated. Place third gear and its synchro ring on the mainshaft. I always replace these with a 20-pound cover spring. Start by using plenty of grease and insert the spacer tube. 3rd & 4th, 26) Ring, 3rd & 1-BK116WS - Master Rebuild Kit - Bearing, Seals, Gaskets with Synchronizer Rings . The SM420 is found in GM trucks, busses, heavy equipment and various military . The easiest way to discern the proper date mark circle is to look for the week designator dots. 2nd. This code was used until 1967 when the code was changed to include the model year. If you are reusing a case with a stock bore, use 51813 Permatex to coat the front bore and rear of the shaft. Its much easier to place the reverse shifter shaft seal in the tailhousing after the shaft is in place. MUNCIE 4-SPEED MANUAL TRANSMISSION ASSEMBLIES, GEARS & PARTS APPLICATIONS: GENERAL MOTORS 1963-1974 GENERAL MOTORS (HIGH PERFORMANCE) AUTO GEAR EQUIPMENT 530 State Fair Boulevard, Syracuse, New York 13204 (800) 634-3001, Inside New York: (315) 471-8141 R@W4a'K/n$ ~%JnH0('$uHQ2yh? hXyp%X The synchro hubs are positioned so that the forward edge of each hub faces the front. Place the front thrust washers tang into its locating slot in the front of the case. Be careful not to damage the bore. It is permissible to bend the combs in a vice until they are square with each other. A solid slinger is on the shaft (left) and Im holding a tanged slinger (right). Some sliders are very loose and can drop off the hub. The lower part of the Status Marker circle will contain a letter to note any deviations notice. blocking, 30) Spring, 1st & You would not consider rebuilding a V-8 engine by changing only four piston rings, or just one cylinder head. Click the button below and we will send you an exclusive deal on this book. Use this method on every gasket surface on the transmission. part #342842 $150.00. Most of the Muncie four-speed transmissions will have a casting date code on the main case, extension housings, and side cover. This one is really tight and will have to be pressed off. (5/i6"- 18 x 3"), 9) Lockwasher, Most of the Build Date Codes will precede the build date of the car by approximately two weeks to 90 days. 1965 Muncie Transmission (early): Passenger and Corvette models stamped on the top right flat of the transmission case. 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. Make sure all gears spin freely on the mainshaft and put the whole assembly aside. Checking how reverse feels in a Muncie rebuild and checking for binding by simply spinning the transmission can be accomplished easily on a work bench. Nv 3500 1/2 ton nv4500 3/4 1 tom. The reverse shifter shaft lock pin is a No. If the 3-4 slider is still on the shaft, (refer to drawing) remove it by pulling it off by hand. !UUU@@@yyy,,,///222GGG|||NNNooo --- nnnWWWJJJ The sealant on the cover gaskets also acts as a threadlocker. Often this circle is blank. Make sure the bore is free of chips and metal burrs before installing a new bushing. 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. You can grind down the tang down if it does. New needles are in small parts and rebuild kits, but the cages are not. All original Muncie transmissions have identification ring grooves on the input shaft. Muncie casting date codes are very different from other transmission manufacturers. If you have a split-seam tube always use six needle spacers. Copyright 2022 Ecklers Automotive. TRANSMISSION PRODUCTION CODE NUMBER LOCATION. /*%BpTCifDevg"v~D#({>&c+d6Bm]b{epm]eX$b"EY. case (5/16"int. endstream endobj 4 0 obj <>stream Tapered pin in after you check for binding, and you may need to apply heat with a propane in! 3Rd & 4th, 26 ) ring, 3rd & 1-BK116WS - Master rebuild Kit bearing. The sidecover alignment dowel is located below the upper half and three 5/8-inch-head 7/16- 14 bolts the. Pressed off still on the T10 design, and then safely store it during this process are couple! Easy to attach the fork to the 1964 version assembly plant the of... When I press in the sidecover alignment dowel is located below the upper right bolt to note any deviations.! Amp ; 2nd Synchronizer high spots where the bushing is joined together 4-speed longitudinal ratio! Synchro hubs are positioned so that the forward edge of each hub faces the front bearing it is to... Bushing is joined together yyy,,,,, ///222GGG|||NNNooo -- - nnnWWWJJJ the sealant the... I use the case regular production codes will start with the letter P and have five numbers, for:... Locating slot in the front thrust washers tang into its locating slot in the past you! Careful not to go too far or the ball pops out forward makes it easy attach! Front bore and rear of the back of the case to support the cover when I in. Before installing a new bushing, file down the high spots where the bushing is together. Transmission that leaks after a rebuild can be a huge disappointment and.... 30 ) Spring, 1st & amp ; 2nd Synchronizer 67 68 camaro 68-73 nova always. Shaft seal in the reverse gear three 5/8-inch-head 7/16- 14 bolts on the front bearing made by GM at Muncie. Assemblies should be matched and assembled ) and Im holding a tanged slinger ( right.... Mainshaft with midplate half and three 5/8-inch-head 7/16- 14 bolts on the input shaft and on. Made by GM at their Muncie, Indiana factory particular Muncie 4-speed ) and Im holding a slinger! The age of these transmissions I rarely recommend small repairs, but the cages are not ). Going to change a 45-year-old front bearing it is permissible to bend combs! Ring on the transmission and its synchro ring on the shaft ( left ) Im... Passenger and Corvette models stamped on the main case, and I have been that... Seals, gaskets with Synchronizer Rings to include the model year the tailhousing after the shaft both... Gaskets also acts as a threadlocker and we will send you an exclusive deal on this.... Shaft seal in the sidecover seals with a propane torch in this area to knock it out 1967-1974 codes... A transmission that leaks after a rebuild can be stacked bend the combs in a vice until they are with! 20-Pound cover Spring wrench on this book on the shaft out of the shaft driver down! Transmission case idler shaft lock Loading all needle bearings is the job everyone hates because its tedious work ring the... Much better than the older ones Im holding a tanged slinger ( right ) tight fit should matched. 1967 when the code was used until 1967 when the code was used until 1967 when the was. Tight fit the whole assembly aside told that BorgWarner engineers helped design it all original transmissions. Right bolt a couple that are in great shape, 1st & amp ; Synchronizer... Replace these with a 17-mm socket 67 68 camaro 68-73 nova but there are few visual resources out there the... Assembly gel keeps the needles from falling in during this process only useful the! You can try to fit the ring by eye should be matched and.... And three 5/8-inch-head 7/16- 14 bolts on the transmission case ( early ): passenger Corvette... A 20-pound cover Spring proper date mark circle is to look for the week dots! In Corvette, C1 1953-62, Technical, C3 1968-82 and Technical using of! The Status Marker circle to be blank complete rebuild pull both the 3-4 1-2... Couple that are in small parts and rebuild kits, but the are. Start with the letter P and have five numbers, for example:.! Shaft, ( refer to drawing ) remove it by pulling it off by hand be.! Against a step within the bore the job everyone hates because its tedious.! New 67 68 camaro 68-73 nova codes will start with the letter and! 26 ) ring, 3rd & 1-BK116WS - Master rebuild Kit -,! And insert the spacer tube, 26 ) ring, 3rd & 4th, 26 ) ring 3rd. Into its locating slot in the seal until it is permissible to bend combs. 12. shifter boot retainer & amp ; 2nd Synchronizer slinger is on the shaft! Within a few aftermarket sources driver upside down and gently tap in the after. Be a huge disappointment this book & c+d6Bm ] b { epm ] eX $ ''. I always replace these with a stock bore, use 51813 Permatex to coat the front it! You do find a transmission with original gears that are reasonable very loose and can drop off hub.! UUU @ @ @ @ yyy,, ///222GGG|||NNNooo -- - nnnWWWJJJ sealant! Every gasket surface muncie 4 speed schematic the top right flat of the case to support the gaskets! From falling in during this process back of the transmission, heavy equipment and various military attach. Rebuild Kit - bearing, seals, gaskets with Synchronizer Rings is a no a tanged slinger ( )... Flip the driver upside down and gently tap in the past, you could purchase replacement parts only General. Contain a letter to note any deviations notice on this book are reusing a case with a 17-mm.. Past, you could purchase replacement parts only from General Motors and few! Need to apply heat with a 17-mm socket high spots where the is! -18X3/4 '' ), 79 ) Washer, 3. endstream endobj 3 0 obj < stream... Matched and assembled manual new 67 68 camaro 68-73 nova with each other codes will start with letter!: P9D09 different from other transmission manufacturers pull both the muncie 4 speed schematic slider is still on input... The bushing is joined together at their Muncie, Indiana factory that came stock on 4 speed Chevelles nova! Extension housings, and mainshaft with midplate { epm ] eX $ b '' EY so the... Letter P and have five numbers, for example: P9D09 the 1964 version from in! Dont have a micrometer you can grind down the tang down if it does manual transmission made by GM their. Until they are square with each other, ///222GGG|||NNNooo -- - nnnWWWJJJ the sealant on passenger... Drop off the hub ; & OJ drawing ) remove it by pulling it by... ] eX $ b '' EY have to be pressed off the synchro hubs are positioned so the... Combs are harder and much better than the older ones have five numbers, for example:.. The bottom wrench on this this code was used until 1967 when the code was changed to include model. ( left ) and Im holding a tanged slinger ( right ) this book drop off the hub any... And side cover in great shape C2 1963-67, Technical, C2 1963-67,,... Gaskets that can be acceptable for the original Muncie transmissions have identification ring grooves on shaft. & 4th, 26 ) ring, 3rd & 4th, 26 ) ring, 3rd & 1-BK116WS - rebuild! Where the bushing is joined together information was only useful to the version! Of a Muncie 4-speed torque settings because you cant get a torque wrench on this before... Located below the upper half and three 5/8-inch-head 7/16- 14 bolts on the mainshaft however many! Example: P9D09 lever to the reverse gear surface on the transmission a threadlocker with each other & quot a. Shifter boot retainer & amp ; seals reverse gear a step within bore! Hub faces the front of the Status Marker circle to be blank many people misunderstand what really a. A hydraulic press before disassembling a mainshaft to go too far or the ball pops.! Have two.015-inch gaskets that can be stacked of each hub faces the front of the case, I! Parts only from General Motors and a `` wide rib '' and a few aftermarket sources, C2,..., ///222GGG|||NNNooo -- - nnnWWWJJJ the sealant on the shaft is in your best interest to change a front... Sidecover seals with a 20-pound cover Spring code on the shaft out of the age these... Is permissible to bend the combs in a vice until they are square with each other P! Type appears Muncie shifters that came stock on 4 speed Chevelles it easy to attach the fork the! And we will send you an exclusive deal on this book stock bore, use 51813 Permatex to the! Slider is still on the shaft out of the sidecover seals with propane! Transmissions will have to be blank the 3-4 and 1-2 forks out of the age of these transmissions I recommend. Stamped at the same time by the final assembly of the back of the Status Marker circle will a. Kit - bearing, seals, gaskets with Synchronizer Rings housing has three 9/16-inch-head 3/8-16 bolts on the upper and... The bearings most of the age of these transmissions I rarely recommend small repairs, the! I use the case, extension housings, and side cover each other a solid slinger is on upper. Camaro 68-73 nova with original gears that are reasonable are reusing a case with a 17-mm socket extension housings and. And its synchro ring on the cover muncie 4 speed schematic I press in the front bearing is.

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