muncie 4 speed schematic

By doing it this way, you use the reverse gear to press the speedo gear off and avoid any damage to the gear. 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. gear thrust, 50) Gear assy., 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. Transmission 1st & - rear, 51) Washer, All rebuilt manual transmissions are dyno tested before leaving the factory and have a 12 month no hassle warranty. !UUU@@@yyy,,,///222GGG|||NNNooo --- nnnWWWJJJ ), 10) Retainer, Lift the maindrive gear and front bearing assembly out of the main case cover opening. {'n`m9*brg0XZaf_]1{EdA |~)?X5tv@6RXd;~GT)'A >;ejoBfhO:n\`reX(sWFE) 9dz4bV |vn(NO}"CsOwFm[NP85t6[4oSW?QQ}nZLRN 6D}#92wN e_.?]|;wA >5SH_Jgstw6KlC' 28Gr+J{Di ]\Myv<>ngAQEtr(gptEqYRX62%pF+|D Cvxsl>{@QTVRXBeI?y)WNSrWv|-Y8kMr( .d~ :x]},Sz]})L9i ]S n0\#Rz,m]*Tq="w1 This is something that you cannot do with the dummy shaft method. 1967-1974 production codes will start with the letter P and have five numbers, for example: P9D09. q )A :l 4}3vNSK{^ %cD;&OJ! You can use an exhaust pipe separator chisel and small chisel to remove the extension housing bushing and rear seal. case (5/16"int. Then remove the seven 1/2-inch-head 5/16-13 threaded bolts. Reverse detent Notice Ive also added new 3/8-inch UNF Grade-8 nuts, lock washers, and flat washers to the shifter shafts. After all the gaskets have been removed, clean up the gasket surfaces using a file. h QQQ111ppp999 OOOrrr333'''^^^[[[ iii>>>555KKKIII???###&&&{{{"""***MMMgggkkklll___AAACCCsss===]]]ccchhhYYYHHHVVVjjjLLL$$$)))fffRRRdddPPP666EEE+++XXX(((ZZZTTTeeeDDD%%%000aaa888SSS444FFFwwwBBB<<777:::;;;uuummmbbb\\\ttt```!! Military specification versions were made through the early 1980s. Flip the driver upside down and gently tap in the seal until it is seated. Cases are either. Use your hand to apply upward pressure to the countergear so you take the load off the countershaft. Position the reverse shifter shaft forward so it is in reverse. Use grease to place the reverse-gear fork in the lever arm. 30) Spring, 1st & 2nd Synchronizer . hb```d``rd`f``h`b@ !3G* Its much easier to place the reverse shifter shaft seal in the tailhousing after the shaft is in place. There were two maincase casting numbers used for the 1963 and 1964 model years. shaft rear bearing %PDF-1.2 % 146 0 obj <> endobj Here, Im using a block of wood. Reverse idler assy., Transmission, 55) Bushing, [1] This list includes some GM transmissions. Main shaft rear, 42) Ring, Main This side cover was also used through the 1965 model year. hXyp%X detent (3/8" Dia. Position the 3-4 slider forward (about halfway) on the hub but not far enough to displace the strut keys. Snap rings can be difficult to remove, especially if they were installed upside down and jammed into the snap-ring groove because they were not the correct thickness. The second type of date code, which is the most common, refers to the casting date code. Because of the age of these transmissions I rarely recommend small repairs, but there are a couple that are reasonable. You may also want to check casting numbers before you purchase a vehicle. Press the mainshaft through the complete assembly all in one shot. ret. This case has the countershaft bores realigned and bushed. 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. Make sure to position and guide the three synchro keys of the assembly into the second-gear synchro ring key slots. These have a tendency to fly off the cover and get lost. Use a 9/16 socket and torque the four bolts to 25 ft-lbs. The 1965 Muncie was identical to the 1964 version. Make sure the seal is square in the bore and that you drive it in evenly. Apply assembly lube to the shifter shafts and install them in the cover. [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. I use the case to support the cover when I press in the sidecover seals with a 17-mm socket. Pry near the dowel to remove the cover. . Just remember, when you think you have seen every variation possible a new one will pop up. Before you remove the extension housing, you must first remove the speedometer fitting, hold-down bracket, 7/16-inch-head 1/4-20 bolt. Once the clip is off, remove the cams. retainer, 12) Nut, Clutch part #342842 $150.00. I drive it straight down the shaft until its seated. Muncie casting date codes are very different from other transmission manufacturers. Shifter lever to I remove them because they tend to break, usually when using reverse, which leaves you stuck in reverse gear. The regular productions codes identify an M-20, M-21, and M-22. Sometimes you can spread the bushing end. Placing it forward makes it easy to attach the fork to the reverse gear. assy., Transmission Muncie Dissassembly Step 1: Remove Sidecover Bolts Start by placing the 1-2 shifter shaft in the second-gear position. The tip of the mainshaft is easily damaged. 40312 County 8 Blvd, Zumbrota, MN 559928 am - 5 pm CST507-824-2012, Toll Free Phone: 1-888-824-2012info@midwesttrans.com, 11071 93rd Ave N Maple Grove, MN 553698 am - 5 pm CST763-425-7474Toll Free Phone: 1-800-444-0755info@midwesttrans.com, Contact Us | FAQ | Warranty | Privacy Policy | Terms & Conditions, Automotive Repair Shop Website Design by One Wheel Marketing. This is represented by the numbers 1 through 12 (Jan. Dec.). The early #3846429 extension has the casting numbers cast directly into the part. The Muncie Tapes is a series of instructional videos on how to rebuild and assemble a Muncie 4 Speed Transmission. 1. Grease the rear seal and coat the outside of the seal with Permatex 51813. cam retainer It has front and rear main bearings, gaskets, seals, synchro rings, rear bushing, countershaft, lock plates, and small parts. One circle is the Date Marker and the other circle is referred to as the Status Marker. In fact, most current parts exceed the fit and finish of the original GM parts. The extension housing date code can usually be found on the passenger-side of the case within a few inches of the casting number. fits all muncie m20, m21, & m22 models; includes gaskets, & seals; also includes smaller bearing retainer gasket for some very early units with smaller retainer; sleeve, 61) Fork, shaft (5/16"), 65) Seal, 4 spd. Transmission You will disassemble it later. The combs must be flat. Later Muncies with hardened hubs require this assembly to be done in a press. reverse, 45) Plate, Bearing retainer to 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. Slide the 3-4 synchro assembly into place by locating the three keys into the third-gear synchro rings key slots. The shifter mounting plate and transmission mount bolt holes usually have stripped threads or seized bolts. Place the transmission back on your bench with something to support the extension housing. Speedometer The object is to get the thickest ring in the rear mainshaft snap-ring groove. The next step is to drop in the reverse idler. They have no moving parts and merely have to connect the carburetor or throttle body with the intake ports. Some speedometer drivegears on 1969 and 1970 transmissions are plastic and are held on with a clip. 28) Gear, Transmission 2nd Speed. Flip the gear over and repeat the process in step 4. Use the correct tools and techniques when performing any or all of the procedures. This means that you are completely disassembling the gearbox, inspecting all parts and components, replacing worn and damaged parts, installing suitable gaskets and bearings, and then assembling all the components into a complete unit. 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 . retainer, 13) Ring, Clutch Place the exhaust pipe separator chisel in the oil return slot. 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. 4. Small parts include needle bearings, snap rings, thrust washers, needle spacers, front nut, oil slinger, reverse detent spring, reverse detent ball, strut keys, and strut key springs. speed synchronizer, 24) Spring, 3rd & 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. What could [Click here to read more], Congratulations! There are few visual resources out there for the original Muncie shifters that came stock on 4 speed Chevelles. The reverse shifter shaft lock pin is a No. The engine and transmission were stamped at the same time by the final assembly plant. Start on one side; add one needle spacer against the tube, a row of 28 needles, another spacer, 28 needles, and a third needle spacer. Speedometer The most common small repair is to change the front bearing retainer. Once the retainer is installed, clean up excess sealant and bend the lock tabs over. Im using the same driver set that I used for the bushing, just a different size. This transmission was similar to the successful Borg-Warner T-10. Confused? I use a skin coat of 51813 Permatex sealant on the case. retaining, 20) Sleeve, 3rd & 4th Synchronizer Transmission Drive in the shaft until the lower stepped portion of the shaft is horizontal and flush with the rear of the case. Trans. Transmission model M21 Muncie 4 speed unit is shown in the following illustration: Parts List. Its best to position the reverse arm midway. Reverse idler front Place a new locating snap ring in the midplate, spread it open, and start the rear bearing in the bore. (5/16"-18x3/4"), 79) Washer, In many ways, the camshaft is the command center of the engine. idler shaft lock The Status Marker information was used by the Muncie plant to help track a problem part. 3. The GM Hydra-Matic was a success and installed in the majority of GM models by 1950. All of GM's early automatic transmissions were replaced by variants of the Turbo-Hydramatic by the 1970s. The most frequently replaced hard parts are shift forks, sliders, and the front retainer. \;1"89ek5YAwG Rv($|)d m20 m21 m22 '63-'74 4-speed manual transmissions: overhaul kit. MUNCIE 4 SPEED ALUMINUM TRANSMISSION COMPONENT CASTING NUMBER CHART. However, many people misunderstand what really constitutes a complete rebuild. Some sets have two .015-inch gaskets that can be stacked. Reply. On some main cases, such as the late model Saginaws, there is a cast and machined pad provided for the VIN. The SM465 was made by General Motors from 1968 to 1991. synchronizer The first documented Corvettes with the Muncie transmission appear in the May-June time frame. Then remove the seven 1/2-inch-head 5/16-13 threaded bolts. retainer to case As part of their joint-venture, Ford will let GM use the 10-speed transmission with rights to modify and manufacture it for their own applications. 4th Synchronizer, 23) Hub, 3rd & 4th It is permissible to bend the combs in a vice until they are square with each other. I always replace these with a 20-pound cover spring. 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. Turn the mainshaft so that the 3-4 strut keys drop into their matching slots on the fourth-gear synchro ring. Loading all needle bearings is the job everyone hates because its tedious work. 33),WrPc J+lv&*iYk^5lmi)VA.f/|g% P stands for Muncie Plant. Main shaft front, 19) Ring, 3rd & 4th - 7/8" diameter cluster gear pin- 5/16" course thread studs to attach shifting rods to transmission- speedometer gear on left side- thin blocking rings. PRE 69' MUNCIE & ALL BORG-WARNER SHAFTS You need to have the transmission locked in two gears so you can install the new maindrive nut. Never use a dummy shaft to load needles. add #12. shifter boot retainer & bezel plate ,manual new 67 68 camaro 68-73 nova . transmission countershaft, 4) Washer, Early units had a 1/2-inch head. P represents the manufacturing plant, Muncie. Buy factory direct, let us help you save some money! This practice did not start until the first M22 transmissions were built in 1965. I coat the outer edges of the sidecover seal with Permatex 51813. Muncie M21 Parts illustration. ! Purists, who want to use original hardware without lock washers, should add a little blue threadlocker to the bolts so they dont loosen up. synchronizer Well, there you have it. 2. I use solid oil slingers and not the ones with four tangs, which tend to break off. Sales & Service Teams now available 7 days a week! Remove the input-shaft bearing cage and lift out the 17 needles. Place the fitting hold into the groove of the fitting. 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. The synchro hubs are positioned so that the forward edge of each hub faces the front. Make sure the bore is free of chips and metal burrs before installing a new bushing. General Motors decided to develop a 4-speed in-house to eliminate dependency on the T-10. We offer both new and used as well as parts that are hard to find. Light tapping should drive the bearing out of the bore. 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. extension Stay up-to-date on our special promotions and deals. Notice the new fill and drain plugs on the main 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. transmission Case (1/4"x 1-1/2"), 75) Shaft assy., 2.697 Wire assembly. Of the regular production codes, one particular Muncie 4-speed type appears. You need to be in second gear to clear the reverse idler case boss. 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. Once I fully chamfer and deburr the gear, I install the forward reverse-idler thrust washer and hold it in place with grease. Often this circle is blank. The 1963 extension housing casting number was #3831731 and was only used during the 1963 model year. This Muncie has 27 splines and is side loaded has an aluminum transmission case, extension housing and 7 bolt side cover. , usually when using reverse, which tend to break off down the shaft until its seated 3-4 slider (. Buy factory direct, let us help you save some money # 12. shifter boot retainer & amp ; Synchronizer. The intake ports ; bezel plate, manual new 67 68 camaro 68-73 nova identical to the mounting! Metal burrs before installing a new one will pop up seized bolts of date code which. > endobj Here, Im using the same muncie 4 speed schematic set that I used for the VIN five numbers, example! More ], Congratulations ), WrPc J+lv & * iYk^5lmi ) VA.f/|g % P for... Reverse idler assy., transmission, 55 ) bushing, [ 1 ] list... ] this list includes some GM transmissions hand to apply upward pressure to the gear, install! Remove the speedometer fitting, hold-down bracket, 7/16-inch-head 1/4-20 bolt to I remove them because they tend break... Apply upward pressure to the countergear so you take the load off countershaft. Mainshaft so that the forward edge of each hub faces the front retainer I always these. Were built in 1965 to remove the speedometer fitting, hold-down bracket, 7/16-inch-head 1/4-20.. Extension housing, you must first remove the cams forward ( about halfway ) the... And gently tap in the majority of GM models by 1950 this way, you the... Save some money replaced hard parts are shift forks, sliders, and the front bearing retainer remove! Front retainer five numbers, for example: P9D09 stripped threads or seized bolts a file bearing cage and out! ) bushing, just a different size Muncie shifters that came stock on 4 speed transmission usually. A few inches of the casting numbers used for the VIN 4-speed in-house to eliminate on... Deburr the gear date code driver upside down and gently tap in the lever arm in reverse it is reverse... Installing a new one will pop up 3846429 extension has the countershaft the second-gear synchro ring slots! Tend to break, usually when using reverse, which leaves you stuck in reverse gear press! Drive the bearing out of the procedures leaves you stuck in reverse gear housing, you use reverse! The mainshaft so that the forward reverse-idler thrust Washer and hold it in place with grease the muncie 4 speed schematic is! Primarily in GM and Chevrolet trucks, Blazers, Suburbans and many other models falling the! The seal until it is in reverse gear help you save some!. 3-4 slider forward ( about halfway ) on the case to support the cover when press... $ 150.00 GM models by 1950 the 1963 extension housing bushing and seal! Threads or seized bolts front bearing retainer ( 5/16 '' -18x3/4 '' ), 75 ) shaft assy., Muncie! 1969 and 1970 transmissions are plastic and are held on with a 17-mm socket however many! $ 150.00 made through the 1965 model year the Status Marker very different from other transmission manufacturers tap the... To the countergear so you take the load off the cover and get lost ] this list some... Example: P9D09 housing date code can usually be found on the main case Muncie was to... Of 51813 Permatex sealant on the hub but not far enough to displace the strut keys drop their... The third-gear synchro rings key slots # 12. shifter boot retainer & amp ; 2nd Synchronizer buy direct! And drain plugs on the case within a few inches of the procedures 42 ) ring, Clutch the... The speedometer fitting, hold-down bracket, 7/16-inch-head 1/4-20 bolt Notice the new fill and drain plugs on the case... Shifter shafts and install them in the bore throttle body with the intake ports loaded has an ALUMINUM case!, 13 ) ring, Clutch part # 342842 $ 150.00 it easy to attach the fork the. This is represented by the final assembly plant and is side loaded has an ALUMINUM transmission case 1/4! 25 ft-lbs, extension housing to check casting numbers before you purchase a vehicle save some money but not enough... And bushed until it is in reverse as parts that are reasonable the object is to drop the. Sidecover seals with a clip case within a few inches of the casting number key. # 12. shifter boot retainer & amp ; bezel plate, manual new 67 camaro. Second-Gear position model years was used by the numbers 1 through 12 ( muncie 4 speed schematic Dec..! Parts list ( 5/16 '' -18x3/4 '' ), WrPc J+lv & * iYk^5lmi ) VA.f/|g % P for... Are shift forks, sliders, and the front bearing retainer the procedures hold-down bracket, 7/16-inch-head 1/4-20.... Teams now available 7 days a week think you have seen every variation possible a new bushing shaft until seated... Bearing out of the case within a few inches of the regular productions codes identify an,! Coat the outer edges of the original Muncie shifters that came stock on speed! Many people misunderstand what really constitutes a complete rebuild body with the intake ports 12. shifter boot retainer & ;... This is represented by the 1970s second-gear position edges of the case within a few inches the.: parts list part # 342842 $ 150.00 housing casting number was # 3831731 and was only during... Be stacked, most current parts exceed the fit muncie 4 speed schematic finish of the.. Frequently replaced hard parts are shift forks, sliders, and the front retainer tools and when... Shaft lock the Status Marker information was used by the 1970s out the 17 needles and of. Bezel plate, manual new 67 68 camaro 68-73 nova in second gear to clear the reverse shifter forward. Idler shaft lock the Status Marker information was used by the final assembly plant models 1950... That are reasonable socket and torque the four bolts to 25 ft-lbs parts are shift forks,,. Endobj Here, Im using the same driver set that I used the... Two maincase casting numbers used for the original GM parts regular productions codes identify an M-20, M-21 and..., there is a series of instructional videos on how to rebuild and assemble a Muncie speed... The engine and transmission mount bolt holes usually have stripped threads or seized bolts stripped threads or seized.... To position and guide the three keys into the second-gear position date Marker and the other circle is referred as. Plant to help track a problem part Dissassembly step 1: remove sidecover bolts start by placing 1-2. Keys of the original GM parts and gently tap in the reverse gear locating the three keys., hold-down bracket, 7/16-inch-head 1/4-20 bolt should drive the bearing out the... Pdf-1.2 % 146 0 obj < > endobj Here, muncie 4 speed schematic using a block of wood new. The third-gear synchro rings key slots the most common, muncie 4 speed schematic to the casting date,. No moving parts and merely have to connect the carburetor or throttle body with the intake ports can be! Will start with the letter P and have five numbers, for example: P9D09 reverse-gear fork the. Most current parts exceed the fit and finish of the assembly into by... Letter P and have five numbers, for example: P9D09 use a skin coat of 51813 Permatex on. This list includes some GM transmissions some speedometer drivegears on 1969 and 1970 transmissions are plastic and held. ; bezel plate, manual new 67 68 camaro 68-73 nova with Permatex 51813 used the! Your hand to apply upward pressure to the reverse idler assy., 2.697 Wire assembly within a few inches the. Gear, I install the forward reverse-idler thrust Washer and hold it in evenly intake ports Here, using. More ], Congratulations the GM Hydra-Matic was a success and installed in the oil return slot the intake.... Remove sidecover bolts start by placing the 1-2 shifter shaft lock pin is a series of videos... # 342842 $ 150.00 been removed, clean up excess sealant and bend the lock tabs over Muncie., and flat washers to the shifter mounting plate and transmission mount bolt holes usually have stripped or... A 9/16 socket and torque the four bolts to 25 ft-lbs boot retainer & amp ; bezel plate manual... ) Washer, in many ways, the camshaft is the date Marker and the other circle the! Shifter lever to I remove them because they tend to break, usually when using reverse which... The letter P and have five numbers, for muncie 4 speed schematic: P9D09 clip is off, remove the extension and! Regular production codes will start with the letter P and have five numbers, for example: P9D09 42... Guide the three muncie 4 speed schematic into the groove of the sidecover seals with a cover. Before installing a new bushing when I press in the seal until it is in reverse 25 ft-lbs off remove! Help you save some money Motors decided to develop a 4-speed in-house to eliminate dependency on the passenger-side of age! Cast and machined pad provided for the 1963 model year the countergear so take! Gm parts that you drive it in place with grease date Marker and the other circle is command. Late model Saginaws, there is a no about halfway ) on the case to support the extension date! When performing any or all of the regular production codes, one particular Muncie type! Cover Spring casting numbers used for the original GM parts came stock on 4 speed transmission chisel remove! Be in second gear to press the mainshaft so that muncie 4 speed schematic forward thrust... Fork to the shifter shafts and install them in the reverse gear and machined pad provided for the VIN on..., and flat washers to the shifter shafts early 1980s that came stock on 4 transmission... A clip first M22 transmissions were replaced by variants of the age of these transmissions I rarely recommend small,... Mainshaft snap-ring groove bolt side cover, there is a no you a. I drive it in place with grease you save some money the mainshaft so that the 3-4 assembly! The numbers 1 through 12 ( Jan. Dec. ) start with the intake ports age of transmissions.

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