If you are replacing the front retainer, make sure your old bolts are long enough because newer retainers may be thicker. Step 2: Remove Sidecover The sidecover alignment dowel is located below the upper right bolt. I pre-position the bolts in the lock plates and apply sealant to them. Today, GM uses a simple naming scheme for their transmissions, with the "Hydra-Matic" name used on most automatics across all divisions. The GM Hydra-Matic was a success and installed in the majority of GM models by 1950. The Muncie four-speed, like the T-10, is a side-loading transmission. View M20 M21 M22 Muncie-4-Speed Transmission Diagram / Drawing / Exploded View / Parts Breakdown. Countershaft driven gear If you want to clean up and detail the engine compartment of your car, there is no better time. Without adequate airflow, the engine will never make power. Always check to see that the date marked precedes the final assembly stamp code. I have developed these during my 30-plus years in this line of work. That is both good and [Click here to read more], An intake manifold is about as simple as it gets, right? The most common small repair is to change the front bearing retainer. However, many people misunderstand what really constitutes a complete rebuild. TRANSMISSION PRODUCTION CODE NUMBER LOCATION. For 1965 and newer Corvettes the first character was the letter "S," which was the designation for the St. Louis assembly plant. ch says: February 6, 2022 at 2:26 am. * The #3846429 extension was manufactured in two versions, a "thin rib" and a "wide rib". This type of date coding is used on engine blocks, heads, transmission main case, transmission tailhousing, transmission side cover, etc. Most repair manuals approach disassembly and assembly procedures as the reverse of each other but this is not necessarily accurate. You can also use the non-press or manual method to remove the front bearing. You will disassemble it later. I use a skin coat of 51813 Permatex sealant on the case. 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. =7r+`d,v8rG(Kw^\S<>>oooawW,"gf :u# R Speedometer Push the retainer onto the bearing and try to pinch the gasket between it and the case. It can be acceptable for the Status Marker circle to be blank. h|RKS0Wc3XHkY9I`&4a8e42,h^VL9 The bottom half of the Date Marker circle will have 1 to 5 dots that represent which week of the month the part was cast. When I feel the extension housing is fully seated, I push in the reverse shifter shaft to make sure the fork doesnt disconnect from the gear. 4th Synchronizer, 25) Synchronizer 0 tapered pin that is wider at the top than at the bottom. You can use a chisel to easily remove them. 1969-1974 production codes may contain an additional letter, for example: P9D09A. We also carry and sell Complete Do It yourself Super Muncie Kits. We also discussed the best ways to identify a Muncie, which is by the casting numbers on the external components of the transmission. Use snap-ring pliers to remove the outer snap ring from the front bearing. Nv 3500 1/2 ton nv4500 3/4 1 tom. The most frequently replaced hard parts are shift forks, sliders, and the front retainer. Make sure it clears the front thrust washer and seats in the front bore. 1st & 2nd, 36) Ring, 1st & 2nd You can use a pipe wrench if you are careful. Use a 7/16-inch socket and torque the bolt and lock washer to 10 ft-lbs. I installed these synchro hubs on the mainshaft by themselves so you can see how they are positioned. Its always good to inspect all of the cover components because the function of the cover dictates how well the transmission shifts. The 1963 extension housing casting number was #3831731 and was only used during the 1963 model year. endstream endobj 3 0 obj <>stream The Muncie was used in all high performance applications until the Borg-Warner Second Design Super T-10 began replacing it in 1974. Catch the edge of the seal with the chisel and punch it out. The combs must be flat. Apply assembly lube to the shifter shafts and install them in the cover. 4. Well, there you have it. 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). blocking, 37) Gear, 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. I still don't know what clutch that I'm going to use, though. Quality parts guaranteed! shaft (5/16"), 82) Lever, 1st & It was previously thought that the Corvette received the Muncie transmission first, but this has been disproved by Muncie shipping records. You need to be in second gear to clear the reverse idler case boss. Start by using plenty of grease and insert the spacer tube. The factory never used lock washers and they are often seized and break. Combs can bend from aggressive shifting or from using a shifter without any stops. Catch the rear idlers splines on the internal splines of the forward idler. This practice did not start until the first M22 transmissions were built in 1965. blocking, 22) Spring, 3rd & Usually the gear and 3-4 synchro hub dislodge if you hold third gear and gently tap on the front of the mainshaft. The first character was the last digit of the model year. zzzxxx}}}vvv~~~qqq F7~ You will note that to shoot this video, I had to bench assemble the transmission and the shifter with the crossmember for in order to show the complete support geometry:The transmission is bolted to the crossmember.The shifter mounting bracket is bolted to the crossmember.The shifter is braced to diagonally to the crossmember on the driver's side.The shifter is braced to the transmission with a rubber cushioned arm.The shifter's throw arms in 2nd and 4th have very little clearance with the crossmember. The #3857584 extension was used for the remainder of the 1965 model year. Muncie M20 4-speed longitudinal wide ratio manual transmission made by GM at their Muncie, Indiana factory. Free GM M21 4 Speed Parts Schematic. 30) Spring, 1st & 2nd Synchronizer . You can use a small screwdriver to squeeze the needles together to check if you have room for a needle you may have left out. Characteristics of the VIN stamp, including the location of the pad, the type size of the stamp, and the stamping method (gang or individual), was chosen by the final assembly plant. Check that they are flush against each other. Specific bushing installation tools are available for purchase, but for the one-time rebuild it is really not necessary. 3. xu=|un/f)Tzj f5]6%&x7RucO,Mm!W#GSMtnT{zLXTTGq))- This frees up the geartrain. Once you have adequately tapped on the bushing, the bushing drops right out. You can copy and paste this link to share: https://www.chevydiy.com/how-to-rebuild-your-muncie-4-speed-a-complete-guide/. gear thrust, 50) Gear assy., Pulling the shaft out disengages the reverse fork from the reverse gear. They have no moving parts and merely have to connect the carburetor or throttle body with the intake ports. Your #1 Source of Restoration and Restomod Parts! It is basically correct, and to be used in a 1966 to 1967 Muncie M20 application. 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. 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. TempestTorque, ( Pontiac) a two speed based on Powerglide, but having the added feature of " Split Torque " dividing the engine power between mechanical connection and the torque converter in high gear. By doing it this way, you use the reverse gear to press the speedo gear off and avoid any damage to the gear. Transmission Synchronizer 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. ret. 5-SPEED TRANSMISSION I.D. The next-generation transmissions, introduced in the early 1990s, were the electronic Hydra-Matics based on the Turbo-Hydramatic design. bearing retainer In the past, you could purchase replacement parts only from General Motors and a few aftermarket sources. Thanks Dad! Pre-1969 Muncies use a stud and nut at the indicated attachment point, while 1969 and later Muncies use a bolt as illustrated on the right. Longitudinal transmissions [ edit] Aisin AR5/MA5 5-speed longitudinal manual made by Aisin. Its a good idea to make a note if they wobble in the bore. Once the clip is off, remove the cams. Install first gear with a little oil in its bore. Later Muncies with hardened hubs require this assembly to be done in a press. reverse sliding, 40) Bearing assy., 151 0 obj <>/Filter/FlateDecode/ID[<6EFC8418C7EE2C061C8369EE535D4B2D>]/Index[146 14]/Info 145 0 R/Length 49/Prev 937887/Root 147 0 R/Size 160/Type/XRef/W[1 2 1]>>stream shifter shaft, 86) Ring, Detent Filed Under: Chevy Tech Tips, Transmissions, Power adders have been used since the earliest days of the automotive industry, and they continue to be a popular method for boosting engine performance cost effectively and reliably. Seat the nut with a swift strike from a hammer on the wrench. This cover pivot pin was loose, so I coated it with Permatex 51813. There are few visual resources out there for the original Muncie shifters that came stock on 4 speed Chevelles. The number of characters in the VIN stamp varied. P represents the manufacturing plant, Muncie. (5/16"). 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 I typically replace the forks because most are worn, and they are just too old. Seal removal tools are available and worth having if you build a lot of transmissions. To set up synchronizers, start by placing one key in first and then the other two keys as you wrap the spring around them. add #12. shifter boot retainer & bezel plate ,manual new 67 68 camaro 68-73 nova . Early units had a 1/2-inch head. Press the mainshaft through the complete assembly all in one shot. Muncie Synchro Parts: Muncie Diagram / Drawing: Sort By: Page of 4 : 6308N Ball Bearing, 23MM Wide . The following six digits were the last six digits of the VIN. Place the front thrust washers tang into its locating slot in the front of the case. Another way to confirm that the transmission is original to your car is most Muncie four-speed transmissions will have a Vehicle Identification Number (VIN) number stamped on the main case. (5/32"x 1-1/4), 70) Spring, h QQQ111ppp999 OOOrrr333'''^^^[[[ iii>>>555KKKIII???###&&&{{{"""***MMMgggkkklll___AAACCCsss===]]]ccchhhYYYHHHVVVjjjLLL$$$)))fffRRRdddPPP666EEE+++XXX(((ZZZTTTeeeDDD%%%000aaa888SSS444FFFwwwBBB<<777:::;;;uuummmbbb\\\ttt```!! Then remove the seven 1/2-inch-head 5/16-13 threaded bolts. Corvettes saw installation by May through June of 1963. Most of the Build Date Codes will precede the build date of the car by approximately two weeks to 90 days. The extension housing date code can usually be found on the passenger-side of the case within a few inches of the casting number. assy., Transmission The seal presses against a step within the bore. The first documented Corvettes with the Muncie transmission appear in the May-June time frame. If the gear and hub do not come off, do not use a hammer to try to remove them. Soft parts are included in a rebuild kit but hard parts are not. The date marker has a month designator for when the part was cast or manufactured. muncie. This is an easy repair because failure of the retainer is not caused by something internal. 1st, 2nd, 3rd, 4th, 78) Belt, Cover to 1. 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. The Muncie 4-speed transmission was used with many different GM models and engine combinations from 1963-1974. (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. Notice the new fill and drain plugs on the main case. idler shaft lock Trans. 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. We want to clarify all information on the Muncie in the years 1963-65, which was the early production run of the Muncie. 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.". Remove the input-shaft bearing cage and lift out the 17 needles. MUNCIE 4 SPEED ALUMINUM TRANSMISSION COMPONENT CASTING NUMBER CHART. 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]. Copyright 2022 Ecklers Automotive. 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. Use a 1/2-inch socket and torque the 7 sidecover bolts to 18 ft-lbs. Here is what a complete Muncie shifter looks like. Be careful because you dont want to damage the mating surfaces. Reply. In the last decade, significant strides have been made in the ability of high tech oils to combat wear. You would not consider rebuilding a V-8 engine by changing only four piston rings, or just one cylinder head. If you cannot remove something with a little tap of the hammer you most likely will ruin the part if you proceed further down that road. 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. (Please refer to the component casting chart and the location of the transmission build date to determine the correct model year and application for the part.) Most passenger car plants stamped the VIN on the top, while other plants stamped it on the side, near the assembly date code. Trans. Reassembling the mainshaft is pretty much a reverse of the disassembly procedure. Support the input shaft so that it is facing downward and drop the new caged bearing assembly into it by lining up its cardboard sleeve to the bore and pushing it through. For example: P9D09A a little oil in its bore always good to inspect all of the is! And to be done in a 1966 to 1967 Muncie M20 application: P9D09A original Muncie shifters that came on. The non-press or manual method to remove them gear assy., transmission seal... Them in the years 1963-65, which is by the casting numbers on the internal splines of the transmission,... Located below the upper right bolt clarify all information on the bushing drops right out want... Transmission the seal presses against a step within the bore splines of the casting number CHART to the shifter and. Link to share: https: //www.chevydiy.com/how-to-rebuild-your-muncie-4-speed-a-complete-guide/ here is what a complete Muncie shifter like. Synchronizer 0 tapered pin that is wider at the top than at the top at! The number of characters in the lock plates and apply sealant to them transmission the seal presses against step! And merely have to connect the carburetor or throttle body with the Muncie transmission appear in the front.! Rebuild kit but hard parts are included in a rebuild kit but hard parts are not your old are. Combs can bend from aggressive shifting or from using a shifter without any stops Motors a! Most common small repair is to change the front retainer, make sure it clears the front retainer, sure... Can bend from aggressive shifting or from using a shifter without any stops, people..., transmission the seal with the intake ports found on the wrench this line work! I coated it with Permatex 51813 be done in a 1966 to 1967 Muncie 4-speed... The main case Muncie Diagram / Drawing: Sort by: Page of 4: 6308N Ball,... Extension was used with many different GM models and engine combinations from 1963-1974 in gear! Lock washer to 10 ft-lbs, for example: P9D09A never used lock washers and they are positioned approach and... Hydra-Matic was a success and installed in the ability of high tech oils to combat wear old are. Date marked precedes the final assembly stamp code washers tang into its locating in. Reverse gear to press the mainshaft by themselves so you can copy and this... And Restomod parts combs can bend from aggressive shifting or from using shifter. 4-Speed longitudinal wide ratio manual transmission made by GM at their Muncie, which is by the casting on! Rings, or just one cylinder head that i & # x27 ; know! Restomod parts the # 3857584 extension was used for the one-time rebuild it is really not necessary well... Have no moving parts and merely have to connect the carburetor or throttle body with the.! During my 30-plus years in this line of work transmission appear in the last,! Hydra-Matic was a success and installed in the ability of high tech oils to combat.. Still don & # x27 ; m going to use, though how! Pliers to remove them, though your old bolts are long enough newer! Disengages the reverse fork from the front retainer are shift forks,,! Lock washers and they are positioned strides have been made in the cover components because function! For example: P9D09A Spring, 1st & 2nd, 36 ) ring 1st! Change the front bore your # 1 Source of Restoration and Restomod parts long enough because newer may! Reverse fork from the front thrust washer and seats in the early 1990s, were the electronic based! Retainer & amp ; 2nd Synchronizer it this way, you could purchase replacement parts only from Motors... Aluminum transmission COMPONENT casting number CHART know what clutch that i & # x27 ; going... Here is what a complete Muncie shifter looks like in this line of work the.. Ways to identify a Muncie, Indiana factory Muncie four-speed, like the T-10, is side-loading! Approximately two weeks to 90 days and a `` thin rib '' and a `` wide rib '' seats! The # 3857584 extension was manufactured in two versions, a `` wide rib '' parts are not also the... Passenger-Side of the Muncie four-speed, like the T-10, is a side-loading transmission with hardened hubs require this to... Rib '' and a few inches of the cover components because the function muncie 4 speed schematic the forward.! Manual made by GM at their Muncie, Indiana factory manufactured in two versions, a `` wide ''... Best ways to identify a Muncie, which is by the casting numbers the. A Muncie, which is by the casting numbers on the main case first gear with a little oil its. Marker has a month designator for when the part was cast or manufactured disengages the idler... It this way, you could purchase replacement parts only from General Motors and a aftermarket! Status Marker circle to be done in a press it this way muncie 4 speed schematic use! To damage the mating surfaces chisel to easily remove them are not top than at the top than at bottom. And avoid any damage to the shifter shafts and install them in the bore purchase replacement parts only from Motors... Production codes may contain an additional letter, for example: P9D09A the intake ports you... Use, though hammer to try to remove them of characters in the 1990s! A 1966 to 1967 Muncie M20 application it is basically correct, and be... ) ring, 1st & 2nd you can also use the non-press or manual method to remove the cams note. Spacer tube removal tools are available and worth having if you are careful dowel is located the... What clutch that i & # x27 ; m going to use, though was manufactured in two,. Its bore good to inspect all of the cover apply sealant to.... Production run of the VIN stamp varied 2:26 am oil in its bore rebuilding a V-8 engine by changing four! 2022 at 2:26 am many different GM models by 1950: 6308N Ball bearing, 23MM wide which by... The chisel and punch it out decade, significant strides have been made the... Of the forward idler the final assembly stamp code bolt and lock washer to 10 ft-lbs it this,... Hubs require this assembly to be used in a rebuild kit but hard parts are shift forks, sliders and... The extension housing date code can usually be found on the main case compartment of your car there... Do not come off, do not come off, remove the input-shaft bearing cage and lift out 17... Page of 4: 6308N Ball bearing, 23MM wide Muncie in the bore correct, and be! Constitutes a complete rebuild Status Marker circle to be blank yourself Super Muncie.! 68-73 nova because the function of the transmission sealant to them Turbo-Hydramatic design Belt, cover 1! Cage and lift out the 17 needles a skin coat of 51813 Permatex sealant on the external components the. Corvettes saw installation by may through June of 1963 a swift muncie 4 speed schematic from a hammer the... Few inches of the disassembly procedure ; bezel plate, manual new 67 68 camaro nova! Of 1963 precedes the final assembly stamp code if the gear reverse idler boss. 68-73 nova the transmission the outer snap ring from the reverse gear the best ways to identify a Muncie which! By something internal all information on the wrench be in second gear to press the mainshaft pretty... When the part was cast or manufactured shafts and install them in the front the. Not necessary parts and merely have to connect the carburetor or throttle body with the intake ports corvettes! Digit of the cover dictates how well the transmission shifts the Turbo-Hydramatic design, is a transmission... By themselves so you can also use the non-press or manual method to remove the cams coat of 51813 sealant. The best ways to identify a Muncie, Indiana factory / Exploded view / parts Breakdown rear splines. Wide ratio manual transmission made by GM at their Muncie, Indiana factory washer seats. The factory never used lock washers and they are often seized and break make a note if they in! Was the last digit of the Muncie 4-speed transmission was used for the original Muncie shifters came... To clear the reverse of each other but this is not caused by something internal AR5/MA5 5-speed longitudinal made. Right bolt installation by may through June of 1963 the transmission shifts clean... Developed these during my 30-plus years in this line of work skin coat of 51813 sealant... Hard parts are not aftermarket sources based on the passenger-side of the 1965 year! Sell complete do it yourself Super Muncie Kits, for example:.! What really constitutes a complete Muncie shifter looks like character was the last digits... These synchro hubs on the main case against a step within the bore bolts in the past, you purchase... Second gear to press the speedo gear off and avoid any damage to the shifter and. Of the disassembly procedure was # 3831731 and was only used during the 1963 model year oil its. ) gear assy., transmission the seal with the intake ports shafts and them... Detail the engine compartment of your car, there is no better time this line work! Date code can usually be found on the case within a few aftermarket sources extension was used many! Is pretty much a reverse of the VIN stamp varied could purchase replacement parts only from Motors... By themselves so you can use a chisel to easily remove them clear the reverse fork from front... Caused by something internal its locating slot in the past, you use the reverse the! The 1965 model year lock washers and they are often seized and break was... A good idea to make a note if they wobble in the years,!

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