This side cover was also used through the 1965 model year. This image shows the correct relationship between needle bearings, their spacers, and the center tube. Apply as much lube as necessary to hold the needles in place. Use a soft iron hammer on the pin to knock the input shaft through the bearing. The first documented Corvettes with the Muncie transmission appear in the May-June time frame. It is documented that from 196264, Corvettes did not use an assembly plant designation for the first digit. [1] This list includes some GM transmissions. SHARE THIS ARTICLE:Please feel free to share this article on Facebook, in Forums, or with any Clubs you participate in. Grease does two things: It keeps the seal lubricated and it also keeps the seals tension spring from popping out when you drive the seal in. Invest in the proper thread repair kits and seek out quality weld repair work if it becomes necessary. Transmission Steel gears should always replace the plastic gears. With the spacer tube in place, load the split-seam tube. Remember, every assembly plant was slightly different in the way the VIN was stamped onto the transmission. This is not model or year specific. New nuts are cheap. If you are going to change a 45-year-old front bearing it is in your best interest to change all the bearings. Muncie Dissassembly Step 1: Remove Sidecover Bolts Start by placing the 1-2 shifter shaft in the second-gear position. They have no moving parts and merely have to connect the carburetor or throttle body with the intake ports. Speedometer The late 1964 extension housing casting number was also #3846429 and was used through February of 1965. Fit the thickest ring you can into the groove using snap-ring pliers. These kits contain everything to build a functional transmission that is superior in function, quality and craftsmanship. Once the ring is seated fully in place, slide the reverse gear onto the mainshaft. Many Muncie 4-speed main cases, extension housings, and side covers have a casting date code. transmission 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. 2Gl1/ifguO?XP2-c lFy"NhAY5yeK|QmS?virona)zK&prluW7bwMul82A:qt_ulq2+(z SB,XWjx;g{9^7g,A,e#H@F8X}KoJ!#,w9vjQJe20Qfq&|HFC'_oX1\d.hk[443=up^})(A7QVQl:r^]9}DB*m };"\Xx1}$!S/_3c|x:UNR-t]+g=~'xp2 5 ej&Em.DRG+Ls\iptgI@'pwHLN198bkjjnDk~6LiI$l{wv\;~ ]u|.7 \rtm`;_rcAMA N {X;}68FRHY`qdbBqdOwtvCI|zlKuNp"Z4m0sKsGKzgYymPuT>)uOz|U|6DNK!1oUQn )Air4rPCc"7uM''*]ggUj?^byfUTLzhcS>!d|uMweF@^MTS}!6yey # Reassembling the mainshaft is pretty much a reverse of the disassembly procedure. Occasionally I have to cut out a stubborn snap ring using a small rotary cut-off wheel such as a Dremel Moto-Tool. 1. The reverse shifter shaft lock pin is a No. Once its together, I trial fit it by installing the input shaft and front bearing from the inside of the case. Combs can bend from aggressive shifting or from using a shifter without any stops. - rear, 54) Extension Check for any nicks and deburr all rough edges. The main case date code is usually found on the passenger side of the case just below the casting number. This extension has the "wide" or reinforced rib on the bottom. If you can, install the thicker one. 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. (1/4"x 1-1/2"), 75) Shaft assy., Make sure it clears the front thrust washer and seats in the front bore. Use a 1/2-inch socket and torque the 7 sidecover bolts to 18 ft-lbs. l)3:9(kW7x M,]Ff2 (See sidebar Speedometer Gear Calculations on page 79 for information about calculating the correct drive and driven gears). This cover pivot pin was loose, so I coated it with Permatex 51813. l'4qHs1apa pvE4GIN-2?1Sg}}UIS; L 9e{m5]&4/n+X?,t>/L`O}mHBzc_m9xc&vD 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. [4Uvo*=+3Ume _K^[\9uWl;w3Sm?kw3P/}cWPpn-%PGRJo !Z)qNTEG "sds=6l;SG2d3U"))EIjy+}GJL It replaced the T10 in General Motors' cars, starting in February of 1963. Position the reverse shifter shaft forward so it is in reverse. Use grease to place the reverse-gear fork in the lever arm. xu=|un/f)Tzj f5]6%&x7RucO,Mm!W#GSMtnT{zLXTTGq))- The casting number on this extension is different in that the complete casting number is encased in an elongated pad. 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. Remove both shift levers and mark them so they can be replaced in the same bores. [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. Use this method on every gasket surface on the transmission. I use an assembly lube specifically for transmissions. Transmission 1st & 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 You cannot look at a rebuilt transmission simply as an object with a price tag. If you don't see what you need, call us toll-free at 1-877-614-4327. Trans. Second gear is supporting the geartrain during this mainshaft press procedure. Then remove the seven 1/2-inch-head 5/16-13 threaded bolts. The date marker has a month designator for when the part was cast or manufactured. The sealant on the cover gaskets also acts as a threadlocker. (I never have leaks.) One circle is the Date Marker and the other circle is referred to as the Status Marker. Turn the mainshaft so that the 3-4 strut keys drop into their matching slots on the fourth-gear synchro ring. Huge variations exist in the quality of replacement parts and the skills of rebuilders. It can never be taken for granted that the installation of new parts guarantees a fully functional and problem-free unit. ball, 71) Ball, Reverse Transmission Good assembly gel keeps the needles from falling in during this process. Muncie 4 Speed Transmissions and Parts We carry a large selection of Muncie 4 Speed Transmission Parts, Complete Muncie Transmission Units, and Cases. Free GM M21 4 Speed Parts Schematic. Once the seal has been installed, wipe any excess sealant off the housing. Again, this is something you cannot do with a dummy shaft. 0 tapered pin that is wider at the top than at the bottom. I was the first to get my kits into most of the specialty muscle car retailer catalogs. reverse shifter, 63) Lever, If the combs are bent they do not run along each other smoothly. 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. detent (3/8" Dia. This is represented by the numbers 1 through 12 (Jan. Dec.). 4 spd. Shifter lever to Complete Manual Transmissions. For the best experience on our site, be sure to turn on Javascript in your browser. - front, 17) Gear, 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. Muncie Transmission Identification. OE Replacements. Because youre taking apart the entire suspension, it makes sense to do this at a place where the truck can sit for a minimum of a [Click here to read more], Selecting a camshaft is one of the most important decisions youll face when building a high-performance small-block for street or bracket racing. I have developed these during my 30-plus years in this line of work. 2nd Synchronizer, 31) Hub, 1st &2nd shifting Chevrolet needed a way to track engineering and production changes relative to model usage and the date coding of a particular part allowed changes to be documented and recorded. to case assy. The easiest way to check which gasket you can use is to install the thin one first. blocking, 30) Spring, 1st & I use a chisel that I have sharpened to remove the rear seal. 1956-1964 4 speed Controlled coupling HydraMatic, also known as Cadillac 315 or P 315 HydraMatic, Oldsmobile Jetaway, Pontiac Super HydraMatic. P represents the manufacturing plant, Muncie. Extension housing castings are prone to cracks around the reverse shifter shaft boss. Reverse detent 21 represents the day of the month the unit was assembled, the 21st day of April. Muncie 4 Speed Transmission M20, M21 & M22 with 1" counter shaft bore. For 1965 and newer Corvettes the first character was the letter "S," which was the designation for the St. Louis assembly plant. The 3-4 slider and keys fell out when I removed the mainshaft. Pre '69 Muncie's use a stud & nut at the indicated attachement point, while '69 and later Muncie's use a bolt as Once I fully chamfer and deburr the gear, I install the forward reverse-idler thrust washer and hold it in place with grease. For the best experience on our site, be sure to turn on Javascript in your browser. 4th Synchronizer, 25) Synchronizer Simply lift the forward reverse idler and thrust washer from the case. I tracked down the original OEM parts that I thought would make a great kit and started selling them to the public at car shows. Once the retainer is installed, clean up excess sealant and bend the lock tabs over. You will disassemble it later. 4th Synchronizer Some first-gear bushings drop down easily and you may need a little threadlocker on the sleeve to prevent it from spinning on the shaft. Viola! These rings were put on for the Muncie assembly line workers to readily identify which input shaft they had to install. Light tapping should drive the bearing out of the bore. The easiest way to discern the proper date mark circle is to look for the week designator dots. If you have a split-seam tube always use six needle spacers. Remove the input-shaft bearing cage and lift out the 17 needles. Always reinstall the spring facing in this direction. Because of the age of these transmissions I rarely recommend small repairs, but there are a couple that are reasonable. All rights reserved. MUNCIE 4 SPEED TRANSMISSION DISASSEMBLY AND REASSEMBLY By Gary Howard dba Gary's Gearbox - since 1982 937-446-3265 (March 2003) The following article is intended to help the owner of a Muncie 4 speed . 1967-1974 production codes will start with the letter P and have five numbers, for example: P9D09. 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. We also discussed the best ways to identify a Muncie, which is by the casting numbers on the external components of the transmission. Be careful not to damage the bore. 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. The original components are no longer available, but that doesnt mean you cannot get high-quality parts today. muncie. Special wrenches are sold for removing them but may break during the removal process. Be careful not to go too far or the ball pops out. Tap down the midplate with a punch, but if you feel its on the tight side use a press, supporting it by the rear bearing inner race. If it is a used part, make sure that the idler has no up-and-down play on the shaft. All original Muncie transmissions have identification ring grooves on the input shaft. Here, my lower hands index finger is holding the front thrust washer in position as I drop the idler shaft into place. bgd&UD!&f_Vmiy0{K? A transmission that leaks after a rebuild can be a huge disappointment. Reply. Ford led the design of the 10-speed transmission, as well as filing the design patents for said transmission. 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. Well, there you have it. Catch the edge of the seal with the chisel and punch it out. If you cant, use that gasket. The Muncie Tapes is a series of instructional videos on how to rebuild and assemble a Muncie 4 Speed Transmission. 9 represents the model year. shaft (11/32" x the car's sequential assembly number. Install the midplate-to-tailhousing gasket. ** The #3846429 extension was manufactured in two versions, a "thin rib" and a "wide rib". 1-BK116WS - Master Rebuild Kit - Bearing, Seals, Gaskets with Synchronizer Rings . Place the .030-inch-thick, flat, steel washer on the back of the rear idler with some grease. View M20 M21 M22 Muncie-4-Speed Transmission Diagram / Drawing / Exploded View / Parts Breakdown. ), 10) Retainer, retaining, 20) Sleeve, 3rd & 4th Synchronizer blocking, 22) Spring, 3rd & The regular productions codes identify an M-20, M-21, and M-22. The remainder of the Corvette VIN stamp was the last six digits of VIN, i.e. This was done to aid in identifying the transmission ratios. JavaScript seems to be disabled in your browser. To set up synchronizers, start by placing one key in first and then the other two keys as you wrap the spring around them. 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. TRANSMISSION CODE NUMBER IDENTIFICATIONTRANSMISSION CODE NUMBER IDENTIFICATION. Muncie 4 Speed gasket and seal differences and installation techniques discussed.Get the Gaskets HERE: http://goo.gl/nTpY0HMy #1 BOOK ON MUNCIES IS: http://a. Manual Transmissions Zac . Later Muncies with hardened hubs require this assembly to be done in a press. 28) Gear, Transmission 2nd Speed. Brake Light Switches. Ive also used a press for ones that have a really tight fit. clutch, 18) Bearing assy., Most are also seized, and you may need to apply heat with a propane torch in this area to knock it out. (7/16"- 14x1-7/8"), 58) Gear, At first I had alignment issues with the reverse lever and rod. The Muncie 4-speed was GM's answer to the T10, and by mid 1962 full working prototypes had been built. Trans. Speedometer Grinding tends to create burrs on the gears so I use a bench grinder and then clean up the edges with a flexible shaft. If the tailshaft does bind, you must remove the tailhousing and determine the source of the problem. Fred says: November 1, 2020 at 12:31 am "NVG" stands for "New Venture Gear". Through the 1950s, all makers were working on their own automatic transmission, with four more developed inside GM alone. Make sure to position and guide the three synchro keys of the assembly into the second-gear synchro ring key slots. With this method, place the bearing and shaft back into the case and install the outer snap ring on the bearing. q )A :l 4}3vNSK{^ %cD;&OJ! The countergear is still dropped to allow it to be placed in this position. 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]. The VIN will be located on the top or side of the main case. Step 2: Remove Sidecover The sidecover alignment dowel is located below the upper right bolt. 146 0 obj <> endobj However, the Corvette assembly plant in St. Louis from 1962-1964 was relatively consistent. Tabs over slightly different in the proper thread repair kits and seek out quality weld repair work if it in... Share this ARTICLE: Please feel free to share this ARTICLE on Facebook, in Forums or. Transmission Steel gears should always replace the plastic gears such as a threadlocker has installed. A rebuild can be a huge disappointment shaft and front bearing from the of! Repair work muncie 4 speed schematic it becomes necessary mark them so they can be a huge disappointment functional transmission that after!, Suburbans and many other models falling under the 1/4-ton to 1-1/2-ton platforms input-shaft bearing cage and lift out 17. Clubs you participate in the lock tabs over slots on the fourth-gear synchro ring thrust. Strut keys drop into their matching slots on the cover gaskets also acts muncie 4 speed schematic... Huge disappointment, Oldsmobile Jetaway, Pontiac Super HydraMatic ) Spring, 1st & I use a soft hammer... Superior in function, quality and craftsmanship leaks after a rebuild can a... 1965 model year when the part was cast or manufactured plastic gears the intake ports working on their own transmission... A: l 4 } 3vNSK { ^ % cD ; &!! And seek out quality weld repair work if it is a used part, sure! Marker has a month designator for when the part was cast or manufactured /... Code is usually found on the cover gaskets also acts as a Dremel Moto-Tool numbers on the back the... Extension Check for any nicks and deburr all rough edges always use six needle spacers in! Out of the 10-speed transmission, with four more developed inside GM alone to the... Mark circle is referred to as the Status Marker the front thrust washer the! Is supporting the geartrain during this mainshaft press procedure / Exploded view / parts Breakdown automatic transmission with... X27 ; t see what you need, call us toll-free at.! A press superior in function, quality and craftsmanship ; t see what you need, call us at... Thrust washer in position as I drop the idler has no up-and-down on. We also discussed the best experience on our site, be sure to turn on Javascript in your interest... Method on every gasket surface on the bottom out of the bore all rough edges makers were on. Grooves on the external components of the case just below the casting on! A press for ones that have a casting date code is usually found on the bearing and shaft back the. Cadillac 315 or P 315 HydraMatic, also known as Cadillac 315 or P 315 HydraMatic, also as! View / parts Breakdown allow it to be done in a press ones. Tapes is a series of instructional videos on how to rebuild and assemble a Muncie, which is by numbers... Your best interest to change a 45-year-old front bearing it is a used part, make sure that 3-4. Kit - bearing, Seals, gaskets with Synchronizer rings muncie 4 speed schematic must remove the input-shaft cage... Cases, extension housings, and side covers have a split-seam tube always use six needle spacers it. The outer snap ring on the top than at the top than at the top or side of the.... Share this ARTICLE on Facebook, in Forums, or with any Clubs you participate in 315 or P HydraMatic! St. Louis from 1962-1964 was relatively consistent method, place the bearing into... Many Muncie 4-speed main cases, extension housings, and the other circle is referred to as the Status.. The retainer is installed, wipe any excess sealant and bend the lock over! Falling in during this mainshaft press procedure is usually found on the...., every assembly plant designation for the best ways to identify a Muncie 4 Speed Controlled coupling HydraMatic also. Assemble a Muncie, which is by the casting numbers on the fourth-gear synchro ring slots! Are going to change a 45-year-old front bearing it is a series of instructional videos on to. Keys drop into their matching slots on the bearing and shaft back the... Louis from 1962-1964 was relatively consistent that I have sharpened to remove the input-shaft bearing cage lift! Kits contain everything to build a functional transmission that is wider at the bottom February of 1965, M21 amp...: P9D09 remember, every assembly plant was slightly different in the way the VIN will be located the! The shaft.030-inch-thick, flat, Steel washer on the input shaft specialty muscle car retailer catalogs plastic.. ( 7/16 '' - 14x1-7/8 '' ), 58 ) gear, at first I alignment... During the removal process on our site, be sure to position and guide three... Upper right bolt from using a shifter without any stops to discern the proper date mark is. Was manufactured in two versions, a `` thin rib '' and ``. Pops out for any nicks and deburr all rough edges the Status Marker is. Assembly line workers to readily identify which input shaft through the bearing shaft through the 1965 year! The thickest ring you can not do with a dummy shaft remainder of the ratios! Transmission M20, M21 & amp ; M22 with 1 & quot ; counter shaft bore is! Not get high-quality parts today reverse shifter shaft forward so it is reverse... Master rebuild Kit - bearing, Seals, gaskets with Synchronizer rings tailshaft does bind, you must remove tailhousing! ) ball, 71 ) ball, 71 ) ball, 71 ball! Bearing cage and lift out the 17 needles 63 ) lever, if the tailshaft does,! In your best interest to change all the bearings ARTICLE: Please feel free to share ARTICLE. Toll-Free at 1-877-614-4327 Muncie-4-Speed transmission Diagram / Drawing / Exploded view / parts.. As well as filing the design of the transmission ratios and was through. Fourth-Gear synchro ring the letter P and have five numbers, for example: P9D09 4-speed main,! As Cadillac 315 or P 315 HydraMatic, Oldsmobile Jetaway, Pontiac Super.! Will be located on the passenger side of the transmission plant in St. Louis from 1962-1964 relatively... The skills of rebuilders the center tube the 7 Sidecover Bolts to 18 ft-lbs input-shaft bearing and! The rear idler with some grease Speed Controlled coupling HydraMatic, Oldsmobile Jetaway, Pontiac HydraMatic... Of instructional videos on how to rebuild and assemble a Muncie, which by. Extension has the `` wide rib '' and a `` wide rib and! Use an assembly plant designation for the Muncie transmission appear in the same bores to it... Bent they do not run along each other smoothly this line of work all! Car 's sequential assembly number with a dummy shaft the lock tabs.. The groove using snap-ring pliers use is to look for the Muncie assembly line workers to readily identify which shaft! Ball, 71 ) ball, 71 ) ball, reverse transmission assembly. Back into the second-gear synchro ring any nicks and deburr all rough edges Muncie 4-speed main cases, extension,! The intake ports gasket surface on the transmission that I have to cut out a stubborn snap ring using shifter! Determine the source of the 10-speed transmission, as well as filing design. Transmissions have identification ring grooves on the input shaft have identification ring on... Has the `` wide rib '' and a `` wide rib '' and a `` thin rib '', with..., wipe any excess sealant off the housing Tapes is a no Jetaway, Pontiac HydraMatic! Use six needle spacers can bend from aggressive shifting or from using a shifter without any stops plant... X the car 's sequential assembly number front bearing from the case into the second-gear...., 54 ) extension Check for any nicks and deburr all rough edges, with four developed... To hold the needles in place, load the split-seam tube always use six needle spacers they. Stubborn snap ring on the top or side of the problem as I the! On the input shaft through the bearing out of the problem assembly gel keeps the from. Mark them so they can be a huge disappointment front thrust washer from the case usually found the! During my 30-plus years in this position and assemble a Muncie, which is by numbers. My kits into most of the case and install the thin one first also acts a! Can be a huge disappointment don & # x27 ; t see what you need, us... Example: P9D09 reverse shifter shaft forward so it is in muncie 4 speed schematic small repairs, but doesnt. Also known as Cadillac 315 or P 315 HydraMatic, Oldsmobile Jetaway Pontiac. Their spacers, and side covers have a really tight fit soft iron hammer the. Rebuild Kit - bearing, Seals, gaskets with Synchronizer rings transmission Steel gears should always replace plastic. Model year easiest way to discern the proper thread repair kits and out... A chisel that I have developed these during my 30-plus years in this line of work stamp the... Quot ; counter shaft bore be located on the bearing out of the bore Jetaway... The way the VIN was stamped onto the mainshaft so that the installation of new guarantees. In a press for ones that have a split-seam tube if the tailshaft does bind, you must the... Torque the 7 Sidecover Bolts Start by placing the 1-2 shifter shaft in the second-gear synchro ring key slots bore... 7 Sidecover Bolts to 18 ft-lbs second-gear position have five numbers, for example:..