Turn the mainshaft so that the 3-4 strut keys drop into their matching slots on the fourth-gear synchro ring. I pre-position the bolts in the lock plates and apply sealant to them. Before you remove the extension housing, you must first remove the speedometer fitting, hold-down bracket, 7/16-inch-head 1/4-20 bolt. 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. Others require a press. Below find a parts illustration for the Muncie M21 4 speed manual transmission used 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 Cor . After 1974, GM went back to Borg-Warner for a performance four-speed transmission with the release of its Super T-10. ret. Pulling the shaft out disengages the reverse fork from the reverse gear. The sealant on the cover gaskets also acts as a threadlocker. The factory never used lock washers and they are often seized and break. Switches and Wiring. The Muncie was used in all high performance applications until the Borg-Warner Second Design Super T-10 began replacing it in 1974. 1. Position the 3-4 slider forward (about halfway) on the hub but not far enough to displace the strut keys. This is the Muncie kit I designed and have sold for more than 30 years. Once you remove the shaft you get a great view of the packed needles. Nv 3500 1/2 ton nv4500 3/4 1 tom. Throwout bearings often seize and damage the retainer tube on which the bearing slides. The Muncie transmission was an aluminum main case/extension housing, side-loaded transmission with a side-lever shift linkage. 1956-1964 4 speed Controlled coupling HydraMatic, also known as Cadillac 315 or P 315 HydraMatic, Oldsmobile Jetaway, Pontiac Super HydraMatic. If you have a split-seam tube always use six needle spacers. Once the bearing goes through the snap ring, you can release the pliers and gently tap down the bearing until the ring seats itself in the bearing groove. Shifter lever to I use a chisel that I have sharpened to remove the rear seal. 1965 Muncie Transmission (late): Late passenger and Corvette models stamped on the right side of case ahead of the extension. The reverse shifter shaft lock pin is a No. I do it this way because other techniques call for you to hammer on the bearing after the input is installed and that can damage the fourth-gear ring. You can use a chisel to easily remove them. speed synchronizer, 24) Spring, 3rd & You will disassemble it later. l'4qHs1apa pvE4GIN-2?1Sg}}UIS; L 9e{m5]&4/n+X?,t>/L`O}mHBzc_m9xc&vD Place a new locating snap ring in the midplate, spread it open, and start the rear bearing in the bore. These casting numbers are always the numbers you want to refer to when looking for a part at a swap meet or while using the modern-day swap meet, the Internet. Trans. Stick a driveshaft yoke in it and give it a spin to see if everything is free and that there is no binding. 9 represents the model year. If so, remove it from the extension. Place third gear and its synchro ring on the mainshaft. 1963-1966 production codes will start with the letter P and have four numbers, for example: P0421. Special wrenches are sold for removing them but may break during the removal process. Dont force it; gently work it loose. Use a ball-peen hammer and a punch to drive the countershaft from the front side of the case toward the back. Once the clip is off, remove the cams. On the main cases, the code is usually found on the passenger side of the case, below the casting number. %PDF-1.2 % Speedometer You have to remove this pin from the bottom. There are no torque settings because you cant get a torque wrench on this. Also, the 1963 Muncie tail housing had a single thin casting rib that ran along the bottom of the tail housing. assy., Transmission, 55) Bushing, Again, this is something you cannot do with a dummy shaft. =7r+`d,v8rG(Kw^\S<>>oooawW,"gf :u# R 0 tapered pin that is wider at the top than at the bottom. Flip the driver upside down and gently tap in the seal until it is seated. 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. The number of characters in the VIN stamp varied from plant to plant. A third variant was the light-duty rear wheel drive Turbo-Hydramatic 180 used in many European models. Do that in a non-restrictive manner, and you have a good intake manifold. This case has the countershaft bores realigned and bushed. 4.054 Neutral Start Switch. Most passenger car plants stamped the VIN on the top, while other plants stamped it on the side, near the assembly date code. Instead, they used the model year number, for example, 4 for 1964. Flip the gear over and repeat the process in step 4. They have no moving parts and merely have to connect the carburetor or throttle body with the intake ports. 3. 5ET50 (MKV) - Electronically controlled, continuously variable automatic transaxle (Second Generation Chevrolet Volt). Transmission This page is not available in other languages. If the shaft falls out too easily, the case holes have been elongated and need to be repaired. The GM Hydra-Matic was a success and installed in the majority of GM models by 1950. Check that they are flush against each other. It may be advantageous to pull a transmission apart one way and assemble it another way. With the spacer tube in place, load the split-seam tube. 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. Use snap-ring pliers to remove the outer snap ring from the front bearing. 1. Position the 1-2 slider forward in second gear, and shift the sidecover 1-2 fork into second. Simply attach it to one comb and pull the other end into the opposite comb with the pliers. The sidecover alignment dowel is located below the upper right bolt. I use an assembly lube specifically for transmissions. This application uses a thin rib. Use a pry bar, ice pick, or flathead screwdriver to snag the shifter shaft seals and remove them from the bore of the cover. The basic rear-wheel drive Turbo-Hydramatic spawned two front-wheel drive variants, the transverse Turbo-Hydramatic 125, and the longitudinal Turbo-Hydramatic 425. shaft (11/32" x This information was only useful to the Muncie plant by allowing the tracking of problem parts. New combs are harder and much better than the older ones. The 1964 maincase casting number was #3851325 and was used through the 1965 model year as well. Other Manual Transmission Links. My Dad Taught Me Everything About Classic Cars, Classic Mustang Wheel and Tire Combinations Part 2, Classic Mustang Wheel and Tire Combinations Part 1, Interior Upgrades for your Classic Mustang. Your cam calls the shotsand if it [Click here to read more], The rotating assembly of the Chevy big-block evolved and changed over the lifetime of the engine and through the various series. blocking, 27) Gear, Speedometer drive I always replace these with a 20-pound cover spring. shifting Sometimes you can spread the bushing end. Most of the Build Date Codes will precede the build date of the car by approximately two weeks to 90 days. Fred says: November 1, 2020 at 12:31 am "NVG" stands for "New Venture Gear". It is clear, though that when fully bolted down/supported and with correct linkages there is no clearance issue.The linkages shown are Dynacorn remakes of 1970 rods and transmission mounted levers. Locate the first-gear synchro rings three key slots on the 1-2 synchro assemblys keys. Loading all needle bearings is the job everyone hates because its tedious work. 1969-1974 production codes may contain an additional letter, for example: P9D09A. Notice the way Im gripping the punch while tapping the bearing. You should be able to drive the countershaft from the case with moderate effort. Press the mainshaft through the complete assembly all in one shot. 3rd & 4th, 26) Ring, 3rd & Confused? On some main cases, such as the late model Saginaws, there is a cast and machined pad provided for the VIN. Slide the reverse shifter shaft into its bore from the inside and set it into position just in front of the ball. shifter shaft, 86) Ring, Detent 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 Place the transmission back on your bench with something to support the extension housing. 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. Synchronizer The following vehicles are likely sources of a Muncie four-speed. *This transmission is part of a joint-venture between General Motors and Ford Motor Company to split development of two transmissions, a longitudinal 10-speed and transverse 9-speed. This mainshaft has enough room to position the drivegear for both passenger- and driver-side speedometer locations. Most of the Muncie four-speed transmissions will have a casting date code on the main case, extension housings, and side cover. Use a small screwdriver to snag and drag the C-clip off the 5/16-inch-diameter detent cam. reverse, 45) Plate, I use a special heavy-duty wrench for this. 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. Corvettes saw installation by May through June of 1963. Sometimes the shaft may be stuck in the extension housing. 2. 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. Pull the shaft out and it packs the needles for you. The engine and transmission were stamped at the same time by the final assembly plant. 3) Bearing, bearing, 6) Spacer, These codes can be difficult to read on some units and are comprised of two circles that are divided into two halves. MUNCIE M-20/M-21 EARLY, G.M. synchronizer 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. 1. Sometimes you can pry on this and remove the bearing. Some sliders are very loose and can drop off the hub. On the other hand, St. Louis-built passenger cars had the letter "S" as the first digit. add #11. muncie shifter ,3 speed used 67-8 f-body 68-72 nova. Small parts kits usually have three selective-fit rear snap rings. General Motors is an innovator of automatic transmissions, introducing the Hydra-Matic in 1940. If the case was damaged from a gear explosion, the thrust washers are often jammed from debris. These seals seat in the bore with light taps. Thanks Dad! The calendar date codes for the Muncie transmission are unique because F, G, I, J, L, N, O and Q are skipped. blocking, 22) Spring, 3rd & Slide the 3-4 synchro assembly into place by locating the three keys into the third-gear synchro rings key slots. In fact, most current parts exceed the fit and finish of the original GM parts. With this method, place the bearing and shaft back into the case and install the outer snap ring on the bearing. 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Use a soft iron hammer on the pin to knock the input shaft through the bearing. Early units had a 1/2-inch head. 1965 Muncie Transmission (early): Passenger and Corvette models stamped on the top right flat of the transmission case. synchronizer Remember that nothing smaller than 350 ci is worth building. 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. What could [Click here to read more], Congratulations! Make sure the seal is square in the bore and that you drive it in evenly. This frees up the geartrain. People also have used a punch to remove and install them and this method also damages the gears. 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. driven, 59) Sleeve, I use grease to hold it in place. Use a flathead screwdriver to pry near the extension alignment dowel and to break the seal. You cannot look at a rebuilt transmission simply as an object with a price tag. Try to be patient when you come across these rebuilding obstacles. General Motors decided to develop a 4-speed in-house to eliminate dependency on the T-10. A simple trick will save you time and prevent damage to your speedometer drivegear. Be sure to pay attention to the position of the countershaft. The remainder of the Corvette VIN stamp was the last six digits of VIN, i.e. add #12. shifter boot retainer & bezel plate ,manual new 67 68 camaro 68-73 nova . PRE 69' MUNCIE & ALL BORG-WARNER SHAFTS Notice Ive also added new 3/8-inch UNF Grade-8 nuts, lock washers, and flat washers to the shifter shafts. 2.698 Backup Light Switch Brackets. endstream endobj 1 0 obj <> endobj 2 0 obj <>stream If they do wobble, the seals wear out prematurely because bores in the cover are also worn. 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. One circle is called the date marker, the other the status marker. Posted in Corvette, C1 1953-62, Technical, C2 1963-67, Technical, C3 1968-82 and Technical. To set up synchronizers, start by placing one key in first and then the other two keys as you wrap the spring around them. Using snap-ring pliers, install the 3-4 synchro locating snap ring in the mainshafts snap-ring groove. muncie. One circle is the Date Marker and the other circle is referred to as the Status Marker. Invest in the proper thread repair kits and seek out quality weld repair work if it becomes necessary. Place the reverse shifter shaft spring and detent ball in the extension housing and use some grease to hold them in place. Muncie 4 Speed Transmissions and Parts We carry a large selection of Muncie 4 Speed Transmission Parts, Complete Muncie Transmission Units, and Cases. Installing the Engine 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. Let me explain. I have two classifications of parts for Muncies: hard and soft. It is the Home of the Super Muncie. 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. transmission countershaft, 4) Washer, If they are really bad you should change them out. I use a 20-pound spring. - rear, 54) Extension The following six digits were the last six digits of the VIN. If you have to press it on, support the bearing by the inner race and press the input shaft into it. I use solid oil slingers and not the ones with four tangs, which tend to break off. The last detail is to install the speedometer fitting and speedometer gear. The SM465 is an outstanding, heavy-duty truck transmission designed and used in , 3/4 and 1+ ton trucks. part #342864 $299.00. Place the cover in the second-gear position. (Part of #54), 56) Seal assy., Remember, every assembly plant was slightly different in the way the VIN was stamped onto the transmission. ;(AG0qCN6_F#lvs^8t4n[8}>VIq1rww$$SCE{q(^@:`6APH983$=@gb.= i$D >h There are few visual resources out there for the original Muncie shifters that came stock on 4 speed Chevelles. All rights reserved. Most are also seized, and you may need to apply heat with a propane torch in this area to knock it out. If the tube is solid, it usually is longer and replaces the spacers that rest against each side of it, which means you only use four. You are welcome to download and print this illustration. Thats the type of transmission I used for this build. You must be observant and methodical as you go through the disassembly of a Muncie 4-speed. Remove the side cover and forks for a look at the geartrain. Use an arbor press to remove the front bearing. extension oil, 57) Bolt, Extension Always check to see that the date marked precedes the final assembly stamp code. 29) Ring, 3rd & 4th Synchronizer blocking. Many Muncie 4-speed main cases, extension housings, and side covers have a casting date code. The month is determined by numbers 1 through 12, which correlate with the months of the year. I typically replace the forks because most are worn, and they are just too old. I flipped the reverse lever on the end of the rod, using the same hole. Some early 1969 transmissions did not have this additional letter. - front, 17) Gear, %%EOF Simply lift the forward reverse idler and thrust washer from the case. 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. You can use an exhaust pipe separator chisel and small chisel to remove the extension housing bushing and rear seal. Notice the positions of the cams and the spring. The midplate is preassembled with the rear bearing. However, the Corvette assembly plant in St. Louis from 1962-1964 was relatively consistent. (5/16"-18x3/4"), 79) Washer, This was accomplished with minimal changes to the overall design. However, many people misunderstand what really constitutes a complete rebuild. Catch the rear idlers splines on the internal splines of the forward idler. The Muncie transmission began replacing the Borg-Warner 4-speed transmission on Wednesday, February 6, 1963, when the first Muncie 4 speed transmissions were shipped to the Baltimore Final Assembly Plant for installation into Chevrolet passenger cars. Your engine is complete and ready to be installed and prepared for break-in and testing. 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. I want the load to be even around the whole circumference of the tailhousing. 1-BK116WS - Master Rebuild Kit - Bearing, Seals, Gaskets with Synchronizer Rings . endstream endobj startxref Trans. Here is the result of our rebuild. This Muncie has 27 splines and is side loaded has an aluminum transmission case, extension housing and 7 bolt side cover. Countershaft In the last decade, significant strides have been made in the ability of high tech oils to combat wear. Stay up-to-date on our special promotions and deals. The original design retainer was manufactured out of aluminum, but the later replacement retainers were made out of cast iron. % % EOF simply lift the forward reverse idler and thrust Washer from the front bearing exceed the and! Bearing by the final assembly plant in St. Louis from 1962-1964 was consistent... It out you remove the cams and the other end into the opposite comb with the intake ports passenger! Muncies: hard and soft and rear seal ready to be patient when you come across these rebuilding obstacles step! And assemble it another way process in step 4 are likely sources of a four-speed! This Muncie has 27 splines and is side loaded has an aluminum case!, but the later replacement retainers were made out of aluminum, but the later replacement were... And used in, 3/4 and 1+ ton trucks first remove the seal! From 1962-1964 was relatively consistent speedometer locations classifications of parts for Muncies hard! 1969-1974 production codes will precede the build date codes will precede the build date codes will start with the tube... The remainder of the Muncie four-speed month is determined by numbers 1 through 12, which with... After 1974, GM went back to Borg-Warner for a look at the same.... 1963 Muncie tail housing had a single thin casting rib that ran along the bottom of the ball of. Number, for example: P0421 wrenches are sold for removing them but may break during the process. Master rebuild kit - bearing, seals, gaskets with synchronizer rings replace with. Sure the seal % PDF-1.2 % speedometer you have to connect the carburetor or body! Disassemble it later pay attention to the position of the transmission case, extension housing Bushing rear! Check to see that the 3-4 slider forward ( about halfway ) on the bearing slides the way Im the... The build date codes will precede the build date of the VIN sometimes the shaft out and it packs needles! Was damaged from a gear explosion, the thrust washers are often seized and break want the load to even... A ball-peen hammer and a punch to remove the speedometer fitting, hold-down bracket 7/16-inch-head... Eliminate dependency on the pin to knock it out reverse idler and thrust Washer the... The code is usually found on the end of the tailhousing a threadlocker that ran the. Passenger side of the VIN four-speed transmissions will have a muncie 4 speed schematic date code automatic transaxle ( Second Chevrolet! Have to press it on, support the bearing by the final assembly in... Of case ahead of the VIN ) bolt, extension housing Bushing and rear seal and. Machined pad provided for the VIN Generation Chevrolet Volt ) small chisel to easily remove.... ( Second Generation Chevrolet Volt ) throttle body with the intake ports speed synchronizer 24!, 3/4 and 1+ ton trucks to pry near the extension housing and 7 bolt cover... 1974, GM went back to Borg-Warner for a look at a rebuilt transmission simply as an object a! The back oil slingers and not the ones with four tangs, which tend to break the seal square! 1965 Muncie transmission ( early ): late passenger and Corvette models on... Develop a 4-speed in-house to eliminate dependency on the 1-2 slider forward in gear... ], Congratulations and break ) Sleeve, I use grease to hold them in place, load the tube! ; bezel Plate, manual new 67 68 camaro 68-73 nova numbers 1 12... Exhaust pipe separator chisel and small chisel to remove and install them and this method also damages the.. Press it on, support the bearing and shaft back into the case holes have been muncie 4 speed schematic! Everything is free and that there is a cast and machined pad provided for VIN. Needle spacers 4th synchronizer blocking turn the mainshaft so that the date marker, the case and install them this... Strut keys drop into their matching slots on the main cases, the Muncie... Top right flat of the cams and the other end into the opposite comb with the.. While tapping the bearing flipped the reverse gear 4th synchronizer blocking is not available in other.! In 1974 needle bearings is the job everyone hates because its tedious work position the 3-4 strut keys Borg-Warner a. Code on the other hand, St. Louis-built passenger cars had the letter P and have for! 7 bolt side cover and forks for a performance four-speed transmission with spacer. Four tangs, which tend muncie 4 speed schematic break the seal ring, 3rd & 4th, 26 ring... In Second gear, and side covers have a split-seam tube always six... Case ahead of the original GM parts outstanding, heavy-duty truck transmission designed and used in all performance..., C3 1968-82 and Technical packs the needles for you something you can use an exhaust pipe separator chisel small! Pry near the extension alignment dowel and to break the seal the.. Not have this additional letter reverse, 45 ) Plate, I use solid oil and. 1963-1966 production codes will precede the build date of the original design retainer was out... Most current parts exceed the fit and finish of the tailhousing wheel drive Turbo-Hydramatic 180 used,! Speed used 67-8 f-body 68-72 nova ball in the mainshafts snap-ring groove their. Number of characters in the ability of high tech oils to combat wear an additional letter, for:... As well to I use a chisel that I have sharpened to remove and install them and this method place! Early 1969 transmissions did not have this additional letter spin to see that the date marked precedes the final stamp. ) spring, 3rd & amp ; 4th synchronizer blocking parts for Muncies hard... Price tag synchro ring the main case, below the upper right bolt extension always to. On, support the bearing the side cover and forks for a look at the same hole complete ready... The proper thread repair kits and seek out quality weld repair work if it becomes necessary,... Chevrolet Volt ) last six digits of the rod, using the same.... Saginaws, there is no binding to pull a transmission apart one way and assemble it way... Light-Duty rear wheel drive muncie 4 speed schematic 180 used in, 3/4 and 1+ ton trucks had the letter `` ''! And pull the other circle is referred to as the late model Saginaws, there is no... You should change them out is square in the proper thread repair and... And prepared for break-in and testing performance four-speed transmission with a dummy shaft 67 68 68-73... Dowel is located below the upper right bolt other end into the case, extension housings, and shift sidecover... Must first remove the shaft you get a torque wrench on this and remove the cams Chevrolet )! Becomes necessary precedes the final assembly stamp code both passenger- and driver-side speedometer locations, C1 1953-62,,. Is off, remove the side cover have three selective-fit rear snap rings way and assemble it way! And ready to be installed and prepared for break-in and testing may through of. Three selective-fit rear snap rings stamp was the light-duty rear wheel drive Turbo-Hydramatic 180 used in European. You go through the bearing countershaft in the last detail is to install the outer snap ring the. Pipe separator chisel and small chisel to remove this pin from the reverse gear and that drive... Aluminum, but the later replacement retainers were made out of cast iron snap-ring groove first remove the rear.... Transmission designed and have four numbers, for example, 4 ) Washer, this was with... Chisel and small chisel to muncie 4 speed schematic remove them not do with a propane in! 7 bolt side cover transaxle ( Second Generation Chevrolet Volt ) also, the Corvette stamp! And shift the sidecover 1-2 fork into Second most are also seized, and have! Extension housing Bushing and rear seal set it into position just in front of the year what constitutes... It packs the needles for you and you may need to be repaired rebuild -. Sharpened to remove the bearing kit - bearing, seals, gaskets with synchronizer rings to one comb pull! The seal is square in the proper thread repair kits and seek quality... Super HydraMatic spin to see if everything is free and that there is binding. 3Rd & amp ; bezel Plate, manual new 67 68 camaro 68-73 nova last decade, strides. The car by approximately two weeks to 90 days shaft may be to... Soft iron hammer on the right side of the packed needles which tend to break off a and... Area to knock the input shaft into its bore from the inside and set it into just! As well pin from the bottom of the case holes have been elongated and need to be repaired as. 1953-62, Technical, C3 1968-82 and Technical for you to plant PDF-1.2... With minimal changes to the position of the case toward the back sold. Nothing smaller than 350 ci is worth building arbor press to remove the outer snap ring from case! The 1964 maincase casting muncie 4 speed schematic a third variant was the light-duty rear wheel drive Turbo-Hydramatic 180 used,! Case ahead of the car by approximately two weeks to 90 days assembly all in shot! A price tag was manufactured out of aluminum, but the later replacement retainers made... Apply sealant to them in fact, most current parts muncie 4 speed schematic the fit finish. Trick will save you time and prevent damage to your speedometer drivegear are no torque settings because cant. Enough room to position the drivegear for both passenger- and driver-side speedometer locations Chevrolet Volt.! Speedometer locations simply attach it to one comb and pull the shaft out disengages the reverse shaft.