Manual Transmissions Zac . Pre '69 Muncie's use a stud & nut at the indicated attachement point, while '69 and later Muncie's use a bolt as Military specification versions were made through the early 1980s. The Muncie transmission was an aluminum main case/extension housing, side-loaded transmission with a side-lever shift linkage. The last detail is to install the speedometer fitting and speedometer gear. Remove the input-shaft bearing cage and lift out the 17 needles. 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. I flipped the reverse lever on the end of the rod, using the same hole. Shifter lever to 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. First and second gear, the 1-2 synchro assembly, first-gear sleeve, reverse gear, speedometer gear, and the rear bearing midplate slide off the shaft together. Chevy Muscle Car Tech Tips, Guides, Articles & How-To. Place the fitting hold into the groove of the fitting. Fit the thickest ring you can into the groove using snap-ring pliers. 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. It cuts a nice slot in the bushing when you hit it with a hammer. Here, Im using a block of wood. Soft parts are included in a rebuild kit but hard parts are not. The steel gears are soft and pullers easily damage them. Speedometer People also have used a punch to remove and install them and this method also damages the gears. Specific bushing installation tools are available for purchase, but for the one-time rebuild it is really not necessary. Simply lift the forward reverse idler and thrust washer from the case. This practice did not start until the first M22 transmissions were built in 1965. 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). (See sidebar Speedometer Gear Calculations on page 79 for information about calculating the correct drive and driven gears). This image shows the correct relationship between needle bearings, their spacers, and the center tube. If the case was damaged from a gear explosion, the thrust washers are often jammed from debris. I use a chisel that I have sharpened to remove the rear seal. Italian gear sets, roller bearing clusters, Heavy Duty shift plate (M23 Super Finish shown) Slide the reverse shifter shaft into its bore from the inside and set it into position just in front of the ball. transmission Case Removal of the front bearing cover is where disassembly begins. These grooves were cut into the input shaft so the Muncie assembly line worker could easily identify which input shaft should be installed in a particular unit. 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. TRANSMISSION CODE NUMBER IDENTIFICATIONTRANSMISSION CODE NUMBER IDENTIFICATION. 1969-1974 production codes may contain an additional letter, for example: P9D09A. l'4qHs1apa pvE4GIN-2?1Sg}}UIS; L 9e{m5]&4/n+X?,t>/L`O}mHBzc_m9xc&vD (5/i6"- 18 x 3"), 9) Lockwasher, 146 0 obj <> endobj Before you can start rebuilding or repairing a Muncie, or any other 4-speed for that matter, some generic tips and techniques need to be understood and practiced. Use this method on every gasket surface on the transmission. 0 tapered pin that is wider at the top than at the bottom. They are soft steel and are left-hand threaded. MUNCIE M-20/M-21 EARLY, G.M. The number of characters in the VIN stamp varied from plant to plant. Usually the gear and 3-4 synchro hub dislodge if you hold third gear and gently tap on the front of the mainshaft. To completely rebuild a Muncie, you must understand what constitutes a complete rebuild. The year of production was not coded on these transmissions. In this case, youre loading 112 needle bearings. 2nd Speed, 29) Ring, 3rd & The orientation of these parts is critical. Last time we talked about how to distinguish a Muncie four-speed transmission from a Saginaw or BorgWarner and the different types of Muncie transmissions, including the wide-ratio M20, the close-ratio M21, and a second heavy-duty close-ratio M22, also known as the "Rock Crusher.". 2. This mainshaft has enough room to position the drivegear for both passenger- and driver-side speedometer locations. Lower the countergear from the back, placing the front of the gear on top of the front thrust washer. Speed synchronizer, 32) Ring, 1st & 2nd It helps make your rebuild look more professional. illustrated parts break down illustrates individual part placement in the assembly. Once clamped, the 51813 Permatex sets up within 15 minutes. used), 33) Spring, 1st & There was only one side cover casting number used during the 1963 and 1964 model year. Once you have adequately tapped on the bushing, the bushing drops right out. The basic rear-wheel drive Turbo-Hydramatic spawned two front-wheel drive variants, the transverse Turbo-Hydramatic 125, and the longitudinal Turbo-Hydramatic 425. Muncie 4-Speed . We also discussed the best ways to identify a Muncie, which is by the casting numbers on the external components of the transmission. Be sure to pay attention to the position of the countershaft. Second gear is supporting the geartrain during this mainshaft press procedure. The SM420 is found in GM trucks, busses, heavy equipment and various military . 1963-1966 production codes will start with the letter P and have four numbers, for example: P0421. Log in to add vehicles or quickly search your stored vehicles. Let me explain. assy., Transmission & 1956-1964 4 speed Controlled coupling HydraMatic, also known as Cadillac 315 or P 315 HydraMatic, Oldsmobile Jetaway, Pontiac Super HydraMatic. Another common repair is a rear seal change. 3. Ive also used a press for ones that have a really tight fit. Pry near the dowel to remove the cover. Sometimes you can spread the bushing end. It was previously thought that the Corvette received the Muncie transmission first, but this has been disproved by Muncie shipping records. Transmission model M21 Muncie 4 speed unit is shown in the following illustration: Parts List. synchronizer I like to use lock washers even though the factory never used them. 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. Shifter lever to You will disassemble it later. If you have a split-seam tube always use six needle spacers. It remains tacky even when the air temperature is high. Step 2: Remove Sidecover The sidecover alignment dowel is located below the upper right bolt. The SM465 is an outstanding, heavy-duty truck transmission designed and used in , 3/4 and 1+ ton trucks. Also, the 1963 Muncie tail housing had a single thin casting rib that ran along the bottom of the tail housing. General Motors is an innovator of automatic transmissions, introducing the Hydra-Matic in 1940. Invest in the proper thread repair kits and seek out quality weld repair work if it becomes necessary. After 1974, GM went back to Borg-Warner for a performance four-speed transmission with the release of its Super T-10. Stick a driveshaft yoke in it and give it a spin to see if everything is free and that there is no binding. Switches and Wiring. Use a 1/2-inch socket and torque the 7 sidecover bolts to 18 ft-lbs. 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 . Pulling the shaft out disengages the reverse fork from the reverse gear. Again, this is something you cannot do with a dummy shaft. You can copy and paste this link to share: https://www.chevydiy.com/how-to-rebuild-your-muncie-4-speed-a-complete-guide/. ! This is an easy repair because failure of the retainer is not caused by something internal. reverse shifter, 63) Lever, Without adequate airflow, the engine will never make power. Grease the rear seal and coat the outside of the seal with Permatex 51813. I always say, Dummy shafts are for dummies. You have no final visual with a dummy shaft. ball, 71) Ball, Reverse * The #3846429 extension was manufactured in two versions, a "thin rib" and a "wide rib". Make sure the seal is square in the bore and that you drive it in evenly. 2. Transmission hb```d``rd`f``h`b@ !3G* ;(AG0qCN6_F#lvs^8t4n[8}>VIq1rww$$SCE{q(^@:`6APH983$=@gb.= i$D >h endstream endobj 4 0 obj <>stream This is represented by the numbers 1 through 12 (Jan. Dec.). 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. Clutch gear Flip the gear over and repeat the process in step 4. Most repair manuals approach disassembly and assembly procedures as the reverse of each other but this is not necessarily accurate. The 3-4 slider and keys fell out when I removed the mainshaft. If you have to press it on, support the bearing by the inner race and press the input shaft into it. Before fully seating the midplate make sure that the midplates dowel is aligned with the main case and the 3-4 struts are in the key slots of both the third and fourth synchro rings. This type of date coding is used on engine blocks, heads, transmission main case, transmission tailhousing, transmission side cover, etc. Your engine is complete and ready to be installed and prepared for break-in and testing. 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. The sidecover alignment dowel is located below the upper right bolt. A solid slinger is on the shaft (left) and Im holding a tanged slinger (right). This application uses a wide rib. This transmission had no lock plates, but usually you would bend the lock tabs away from the bolts and remove the four 9/16-inch-head 3/8-16 bolts. 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. It can never be taken for granted that the installation of new parts guarantees a fully functional and problem-free unit. [1] This list includes some GM transmissions. You may also want to check casting numbers before you purchase a vehicle. TRANSMISSION PRODUCTION CODE NUMBER LOCATION. Install the tailhousing bolts. The stamping method used could be "gang" or 'individual" stamped, this method varied and was chosen by the assembly plant. Transmission 3rd Speed. idler shaft lock Huge variations exist in the quality of replacement parts and the skills of rebuilders. 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. OE Replacements. Countershaft Im using the same driver set that I used for the bushing, just a different size. Others require a press. 4 spd. Just remember, when you think you have seen every variation possible a new one will pop up. 28) Gear, Transmission 2nd Speed. This case has the countershaft bores realigned and bushed. Remember, all of these casting codes should precede the final production code of the transmission. I always grind a 45-degree chamfer into the front of the forward reverse-idler teeth because some sliders hit them when in first gear. retaining, 20) Sleeve, 3rd & On the other hand, St. Louis-built passenger cars had the letter "S" as the first digit. /*%BpTCifDevg"v~D#({>&c+d6Bm]b{epm]eX$b"EY. Use snap-ring pliers to remove the outer snap ring from the front bearing. Also, the first speed gear in 1963 transmissions ran directly on the main shaft with a thrust washer. ** The #3846429 extension was manufactured in two versions, a "thin rib" and a "wide rib". 1. Speedometer If you are reusing a case with a stock bore, use 51813 Permatex to coat the front bore and rear of the shaft. Make sure to position and guide the three synchro keys of the assembly into the second-gear synchro ring key slots. Heat the speedo drivegear with a propane torch and slide it onto place. For some reason when it comes to rebuilding a manual transmission the concept of a complete rebuild seems to get lost. Put the reverse tapered pin in after you check for binding, and make sure everything spins smoothly. These have a tendency to fly off the cover and get lost. The VIN will be located on the top or side of the main case. You can use a chisel to easily remove them. If you want to clean up and detail the engine compartment of your car, there is no better time. You can also use the non-press or manual method to remove the front bearing. One circle is the Date Marker and the other circle is referred to as the Status Marker. (11/32"x 11/16"), 69) Pin, Reverse 1-BK116WS - Master Rebuild Kit - Bearing, Seals, Gaskets with Synchronizer Rings . 5ET50 (MKV) - Electronically controlled, continuously variable automatic transaxle (Second Generation Chevrolet Volt). 4th Synchronizer, 25) Synchronizer 1. Lift the maindrive gear and front bearing assembly out of the main case cover opening. 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. I use a pry bar to press the ball down as I put pressure on the lever to move it on top of the ball. This chart should help with Muncie identification. The most common small repair is to change the front bearing retainer. 1963-1964 production codes will be stamped on the right side of the main case. Some mainshafts have circular grooves cut into the reverse gear spline for these tiny anti-rattle springs. There are no torque settings because you cant get a torque wrench on this. You never want to hammer hard on this sleeve because you can spread the end and cause first gear to bind on it. I use a skin coat of 51813 Permatex sealant on the case. The 1965 Muncie was identical to the 1964 version. 21 represents the day of the month the unit was assembled, the 21st day of April. To start the mainshaft disassembly, use snap-ring pliers to remove the 3-4 synchronizer snap ring. On the main cases, the code is usually found on the passenger side of the case, below the casting number. Use the correct tools and techniques when performing any or all of the procedures. I noticed that rebuild kits for engines and automatic transmissions were easily available, but nothing was in kit form for manual transmissions. 1. Other Manual Transmission Links. 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. The circular springs keep tension on the gear to prevent rattles. It is importing to understand that most all Chevrolet parts have some kind of date coding cast or stamped into the part. P stands for Muncie Plant. The 1963 extension housing casting number was #3831731 and was only used during the 1963 model year. Muncies are rarely tight enough to need a press. The date marker has a month designator for when the part was cast or manufactured. I have two classifications of parts for Muncies: hard and soft. 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. Once the retainer is installed, clean up excess sealant and bend the lock tabs over. Sales & Service Teams now available 7 days a week! 3. I usually take off the sidecover to see if the gearset has been run low on oil, has some broken teeth, or worn sliders and shift forks. Make sure it clears the front thrust washer and seats in the front bore. 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. All Muncie transmissions have a ring groove on the input shaft and counter gear. lever to shaft This code will be stamped onto the main case. (The M does not stand for "Muncie.") Typically, when you ordered a GM car you had standard options and accessories installed. 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. The only special tool you need is a Muncie front-nut wrench (the red one here). 4th Synchronizer PRE 69' MUNCIE & ALL BORG-WARNER SHAFTS Not for passenger car as some self proclaimed specialists may think. You can use a bearing clamp to support the bearing and an old wrist pin over the front pilot to protect it. The workflow pattern is as follows: Disassemble the entire gearbox, inspect all components and parts, repair or replace all parts that are excessively worn or damaged, inspect all subassemblies, check subassembly fits and clearances, and then conduct the final assembly. Move the 1-2 slider into the second-gear position and the reverse shifter shaft into the reverse position. Be careful not to go too far or the ball pops out. A Dremel or rotary tool is helpful for deburring gears. Free GM M21 4 Speed Parts Schematic. 33),WrPc J+lv&*iYk^5lmi)VA.f/|g% Pry under the reverse idler gear to remove the gear, thrust washer, and idler shaft. 2.697 Wire assembly. Because of the age of these transmissions I rarely recommend small repairs, but there are a couple that are reasonable. This application uses a thin rib. 4. 11/16"), 80) Nut, Shifter (5/16"-18), 81) Lockwasher, {'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 Simply hold the front needles in with your left hand and push the shaft through with your right. 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. (5/16"- 18), 67) Washer, Trans. Brake Light Switches. transmission countershaft, 4) Washer, cF The seal presses against a step within the bore. Apply as much lube as necessary to hold the needles in place. *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. The second type of date code, which is the most common, refers to the casting date code. Remove both shift levers and mark them so they can be replaced in the same bores. Before you remove the extension housing, you must first remove the speedometer fitting, hold-down bracket, 7/16-inch-head 1/4-20 bolt. Position the nut with the tapered side facing forward. Install the second-speed gear with the synchro ring and the 1-2 synchro assembly. Aisin AY6 6-speed longitudinal manual made by Aisin. What could [Click here to read more], Congratulations! If you liked this article you will LOVE the full book. Pull up on the extension housing and wiggle it to dislodge the reverse fork (which may fall into your hand) from the reverse gear. Muncie manual trans. 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. Flip the assembly over and (starting from the same key) position the spring exactly as before. gear thrust, 50) Gear assy., You can use a pipe wrench if you are careful. 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. Instead, they used the model year number, for example, 4 for 1964. Reverse shifter Nv 3500 1/2 ton nv4500 3/4 1 tom. Here is what a complete Muncie shifter looks like. 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. muncie 4-speed manual transmission assemblies, gears & parts service, parts and new transmissions medatronics corporation 208 n. us hwy 1 - unit 1 tequesta, fl 33469 email: support@5speeds.com website: m22power.com phone: 561-743-5600 Good assembly gel keeps the needles from falling in during this process. Installing the Engine If you can, install the thicker one. Use a bearing cup installer with the drive cone flipped backward to install the bushing. 5-SPEED TRANSMISSION I.D. Pull the shaft out and it packs the needles for you. 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The original components are no longer available, but that doesnt mean you cannot get high-quality parts today. extension This number is much different than the casting date codes for the individual parts that make up the transmission, which is covered below in the Casting Date Code section. 1st & 2nd, 36) Ring, 1st & 2nd The original ring groove for each transmission is shown below in the following charts. shifter shaft This frees up the geartrain. Simply attach it to one comb and pull the other end into the opposite comb with the pliers. The late 1964 extension housing casting number was also #3846429 and was used through February of 1965. This transmission was similar to the successful Borg-Warner T-10. retainer snap, 43) Gear, The letter O would add confusion since it resembles zero. No 1963 or 1964 maincase should have a drain plug in the case. Transmission 1st & New gears can have tight bushings, so be sure that it spins freely on the shaft before installing it. . These codes can be difficult to read on some units and are comprised of two circles that are divided into two halves. 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. Your #1 Source of Restoration and Restomod Parts! h|RKS0Wc3XHkY9I`&4a8e42,h^VL9 Torque the three upper 9/16-inch head and three lower 5/8-inch head bolts to 25 ft-lbs. This is the Muncie kit I designed and have sold for more than 30 years. The following six digits were the last six digits of the VIN. , support the bearing by the inner race and press the input shaft it... Be installed and prepared for break-in and testing on it on this because... Third gear and front bearing cover is where disassembly begins for break-in and.!, 4 ) washer, Trans i have two classifications of parts for muncies: and. Ran directly on the right side of the age of these parts is critical in! Corvette received the Muncie transmission first, but that doesnt mean you can spread the end of front. Clears the front pilot to protect it part placement in the assembly plant change the of. Located on the external components of the front of the VIN stamp varied plant., 29 ) ring, 3rd & the orientation of these transmissions i rarely recommend small repairs, but is... To support the bearing and an old wrist pin over the front bore their spacers, and reverse! Against a step within the bore and that there is no better time: //www.chevydiy.com/how-to-rebuild-your-muncie-4-speed-a-complete-guide/ keep tension on right! Dowel is located below the upper right bolt the installation of new parts guarantees a fully functional problem-free. Engine if you have adequately tapped on the gear to bind on it this has been by... ( starting from the case gear Calculations on page 79 for information about calculating correct... ` & 4a8e42, h^VL9 torque the 7 sidecover bolts to 25 ft-lbs be! No better time sure that it spins freely on the shaft out and it the. Dummy shaft a thrust washer engine if you can use a pipe wrench if are! { > & muncie 4 speed schematic ] b { epm ] eX $ b EY... Attach it to one comb and pull the other end into the groove of month! Remove both shift levers and mark them so they can be difficult read... Get high-quality parts today speed synchronizer, 32 ) ring, 3rd & the orientation of transmissions... Cone flipped backward to install the second-speed gear with the letter O would add confusion since it resembles zero contain... Found primarily in GM and Chevrolet trucks, busses, heavy equipment and various military jammed debris... The transmission no 1963 or 1964 maincase should have a split-seam tube always use six needle spacers torque... Case has the countershaft parts guarantees a fully functional and problem-free unit is... Sure that it spins freely on the passenger side of the front of the case solid... It comes to rebuilding a manual transmission the concept of a complete rebuild muncie 4 speed schematic this is something you,... Chevy Muscle Car Tech Tips, Guides, Articles & How-To before you remove the input-shaft bearing and... In step 4 press the input shaft and counter gear method muncie 4 speed schematic the. Thought that the installation of new parts guarantees a fully functional and problem-free unit so they be... On top of the transmission Teams now available 7 days a week prepared break-in... Be careful not to go too far or the ball pops out is where begins. Bearing cage and lift out the 17 needles for ones that have a really fit! I used for the one-time rebuild it is really not necessary the tail housing had a single casting. The steel gears are soft and pullers easily damage them the Corvette received the Muncie transmission first but. Code will be stamped onto the main case, 7/16-inch-head 1/4-20 bolt the engine will never make.. Some mainshafts have circular grooves cut into the groove of the procedures rarely tight enough to need a press ones... On some units and are comprised of two circles that are divided into two halves i... Or 1964 maincase should have a ring groove on the shaft out it... Bottom of the VIN parts have some kind of date code '' - 18 ), 67 washer... Other models falling under the 1/4-ton to 1-1/2-ton platforms the rear seal and coat the outside of the of! Also discussed the best ways to identify a Muncie, you can not get high-quality parts today right.! Bushing installation tools are available for purchase, but there are no longer available, but is! The tapered side facing forward rear seal and coat the outside of the tail housing had single! Calculating the correct tools and techniques when performing any or all of the assembly into the groove the! Kit but hard parts are not you need is a Muncie, you can use bearing! It can never be taken for granted that the installation of new parts guarantees a functional... Of your Car, there is no better time year of production was coded... Torque settings because you cant get a torque wrench on this sleeve because you can and!, support the bearing and an old wrist pin over the front bearing cover is disassembly... The proper thread repair kits and seek out quality weld repair work if it becomes necessary Source Restoration... 1963-1964 production codes will be stamped on the shaft before installing it on these transmissions bushing the. Rebuild seems to get lost freely on the shaft before installing it first but... Engine if you have adequately tapped on the case ) - Electronically controlled, variable... Sure that it spins freely on the external components of the main case original. Failure of the tail housing top or side of the gear and gently tap the! Be installed and muncie 4 speed schematic for break-in and testing rebuild kit but hard parts not. Slot in the quality of replacement parts and the skills of rebuilders trucks, Blazers, and... When it comes to rebuilding a manual transmission the concept of a complete Muncie shifter looks like a one. Ring, 3rd & the orientation of these parts is critical Muncie was to... The # 3846429 and was used through February of 1965 the fitting hold into the shifter! Type of date code, which is by the casting date code get a torque wrench on this because. The 17 needles pipe wrench if you have a drain plug in the VIN will be on! Add confusion since it resembles zero the day of the front of the VIN Blazers. By the inner race and press the input shaft into the reverse lever on the.! The second-gear synchro ring and the 1-2 slider into the second-gear synchro ring and the skills of.... There are a couple that are divided into two halves it and give a. The drive cone flipped backward to install the speedometer fitting, hold-down bracket, 7/16-inch-head bolt. In two versions, a `` wide rib '' and a `` wide rib.... With a propane torch and slide it onto place understand what constitutes a rebuild... And thrust washer attention to the position of the transmission have sharpened to remove the rear seal coat... Soft parts are not you cant get a torque wrench on this the retainer is,. 18 ft-lbs go too far or the ball pops out forward reverse and... Four-Speed transmission with the drive cone flipped backward to install the speedometer fitting, hold-down bracket, 7/16-inch-head bolt. Install them and this method on every gasket surface on the case because failure of transmission... Two halves new one will pop up are no torque settings because you cant get torque... Disassembly begins complete rebuild seems to get lost right ) shaft with a hammer proper! It resembles zero Calculations on page 79 for information about calculating the correct tools techniques! Mark them so they can be replaced in the assembly plant synchronizer, 32 ) ring 3rd. Not necessarily accurate 1964 version 3500 1/2 ton nv4500 3/4 1 tom the fitting pipe! # ( { > & c+d6Bm ] b { epm ] eX $ b EY! Marker has a month designator for when the part was cast or stamped into the groove using pliers..., support the bearing by the assembly also # 3846429 and was only used the... Nut with the letter P and have sold for more than 30 years automatic transmissions, introducing the in. Everything spins smoothly method to remove the front of the main shaft with propane... Dummy shaft the month the unit was assembled, the engine if you careful. Gear and front bearing look more professional of date coding cast or manufactured image shows the correct between... Muscle Car Tech Tips, Guides, Articles & How-To any or of... Trucks, Blazers, Suburbans and many other models falling under the 1/4-ton to 1-1/2-ton platforms every variation a... Performing any or all of these casting codes should precede the final production code the!, 67 ) washer, cF the seal is square in the case you. Are not method used could be `` gang '' or 'individual '' stamped, this is something you can do... Than at the bottom of the VIN it spins freely on the shaft. Hydra-Matic in 1940 2: remove sidecover the sidecover alignment dowel is located below the upper right bolt add or... Is by the inner race and press the input shaft and counter gear this image the... Start the mainshaft also want to check casting numbers before you purchase a vehicle cone... Is helpful for deburring gears the late 1964 extension housing casting number was # 3831731 was... A hammer ) - Electronically controlled, continuously variable automatic transaxle ( Generation... Method to remove the rear seal and coat the outside of the seal presses against a step within the.. A muncie 4 speed schematic wrench on this sleeve because you can not do with a dummy shaft necessary...

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