muncie 4 speed schematicmuncie 4 speed schematic

Transmission blocking, 27) Gear, - rear, 54) Extension The calendar date codes for the Muncie transmission are unique because F, G, I, J, L, N, O and Q are skipped. Click the button below and we will send you an exclusive deal on this book. (never You can copy and paste this link to share: https://www.chevydiy.com/how-to-rebuild-your-muncie-4-speed-a-complete-guide/. Pulling the shaft out disengages the reverse fork from the reverse gear. . You have to remove this pin from the bottom. There are no torque settings because you cant get a torque wrench on this. Transmission 1st & 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. Huge variations exist in the quality of replacement parts and the skills of rebuilders. Occasionally I have to cut out a stubborn snap ring using a small rotary cut-off wheel such as a Dremel Moto-Tool. 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. At this point, the geartrain is completely apart. - 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. I use a chisel that I have sharpened to remove the rear seal. (Part of #25-35), 48) Washer, The following vehicles are likely sources of a Muncie four-speed. The Status Marker information was used by the Muncie plant to help track a problem part. 11/16"), 80) Nut, Shifter On the other hand, St. Louis-built passenger cars had the letter "S" as the first digit. Flip the gear over and repeat the process in step 4. 2.698 Backup Light Switch. Sometimes you can pry on this and remove the bearing. P represents the manufacturing plant, Muncie. 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. blocking, 30) Spring, 1st & 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 . Speedometer (5/i6"- 18 x 3"), 9) Lockwasher, 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. gear bearing No 1963 or 1964 maincase should have a drain plug in the case. 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.". I coat the outer edges of the sidecover seal with Permatex 51813. 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. part #342861 $239.00. An easier solution would be to find one of the more standardized 2.52:1 or 2.20:1 Muncie four-speeds that were used from 1966-'74. Ive also used a press for ones that have a really tight fit. endstream endobj 147 0 obj <> endobj 148 0 obj <> endobj 149 0 obj <>stream Pry under the reverse idler gear to remove the gear, thrust washer, and idler shaft. 2. shifter shaft All of the casting codes should be within 30 to 90 days of each other and in most cases will be reasonably close to each other. If you don't see what you need, call us toll-free at 1-877-614-4327. Place the slinger on the input shaft and tap on the front bearing. JavaScript seems to be disabled in your browser. bearing retainer One half of the Date Marker circle will have a month designator for when the part was cast. 2nd Speed, 29) Ring, 3rd & Place the reverse shifter shaft spring and detent ball in the extension housing and use some grease to hold them in place. I have two classifications of parts for Muncies: hard and soft. reverse sliding, 40) Bearing assy., Lower the mainshaft assembly into the case and hold the 3-4 slider in its half-forward position. These seals seat in the bore with light taps. P represents the manufacturing plant, Muncie. The status marker has the latest blueprint change number on one side of the circle, and a deviation notice letter on the other side of the part change letter is active. Stick a driveshaft yoke in it and give it a spin to see if everything is free and that there is no binding. I noticed that rebuild kits for engines and automatic transmissions were easily available, but nothing was in kit form for manual transmissions. There are few visual resources out there for the original Muncie shifters that came stock on 4 speed Chevelles. From the left, the subassemblies are the tail section, main case, sidecover, and mainshaft with midplate. You will note that to shoot this video, I had to bench assemble the transmission and the shifter with the crossmember for in order to show the complete support geometry:The transmission is bolted to the crossmember.The shifter mounting bracket is bolted to the crossmember.The shifter is braced to diagonally to the crossmember on the driver's side.The shifter is braced to the transmission with a rubber cushioned arm.The shifter's throw arms in 2nd and 4th have very little clearance with the crossmember. This acts like a sealant and a threadlocking compound. The next-generation transmissions, introduced in the early 1990s, were the electronic Hydra-Matics based on the Turbo-Hydramatic design. Apply assembly lube to the shifter shafts and install them in the cover. reverse, 45) Plate, Fred says: November 1, 2020 at 12:31 am "NVG" stands for "New Venture Gear". For the best experience on our site, be sure to turn on Javascript in your browser. Reverse idler The Muncie Tapes is a series of instructional videos on how to rebuild and assemble a Muncie 4 Speed Transmission. Because several different replacement front bearing retainers are available, different-thickness gaskets are necessary. 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. The #3857584 extension was used for the remainder of the 1965 model year. Some mainshafts have circular grooves cut into the reverse gear spline for these tiny anti-rattle springs. 1. The lower part of the Status Marker circle will contain a letter to note any deviations notice. Thats the type of transmission I used for this build. The Muncie transmission was an aluminum main case/extension housing, side-loaded transmission with a side-lever shift linkage. 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. Later Muncies with hardened hubs require this assembly to be done in a press. Sales & Service Teams now available 7 days a week! If you liked this article you will LOVE the full book. 4. Sometimes you can spread the bushing end. Written by Paul Cangialosi and Posted with Permission of CarTechBooks. Need an individual part (call with item number off the illustration below) or need a rebuilt transmission, bearing overhaul kit or other parts, give us a call888-824-2012, free technical support. The synchro hubs are positioned so that the forward edge of each hub faces the front. QQtx:ES~U*T.Ly&(6*'? 7s The 1963 extension housing casting number was #3831731 and was only used during the 1963 model year. Once the seal has been installed, wipe any excess sealant off the housing. 3) Bearing, Countershaft Place the fitting hold into the groove of the fitting. Of the regular production codes, one particular Muncie 4-speed type appears. Turn the mainshaft so that the 3-4 strut keys drop into their matching slots on the fourth-gear synchro ring. The bottom half of the Date Marker circle will have 1 to 5 dots that represent which week of the month the part was cast. I typically replace the forks because most are worn, and they are just too old. If the 3-4 slider is still on the shaft, (refer to drawing) remove it by pulling it off by hand. transmission Case SHARE THIS ARTICLE:Please feel free to share this article on Facebook, in Forums, or with any Clubs you participate in. The casting number on this extension is different in that the complete casting number is encased in an elongated pad. The main case date code is usually found on the passenger side of the case just below the casting number. %PDF-1.6 % There are few visual resources out there for the original Muncie shifters that came stock on 4 speed Chevelles. The following six digits were the last six digits of the VIN. Muncie Synchro Parts: Muncie Diagram / Drawing: Sort By: Page of 4 : 6308N Ball Bearing, 23MM Wide . This image shows the correct relationship between needle bearings, their spacers, and the center tube. Use a pry bar, ice pick, or flathead screwdriver to snag the shifter shaft seals and remove them from the bore of the cover. (Please refer to the component casting chart and the location of the transmission build date to determine the correct model year and application for the part.) the car's sequential assembly number. You can use a pipe wrench if you are careful. Move the 1-2 slider into the second-gear position and the reverse shifter shaft into the reverse position. Then remove the seven 1/2-inch-head 5/16-13 threaded bolts. shaft rear bearing (See sidebar Speedometer Gear Calculations on page 79 for information about calculating the correct drive and driven gears). According to an official report by the SAE (Society of Automotive Engineers) the design of the 10-speed gearbox is essentially all Ford, while GM was responsible for designing the 9-speed 9T transverse automatic gearbox. Use a ball-peen hammer and a punch to drive the countershaft from the front side of the case toward the back. If we can put together enough odd codes maybe we can publish a few in the future. Steel gears should always replace the plastic gears. The 1964 maincase casting number was #3851325 and was used through the 1965 model year as well. Nv 3500 1/2 ton nv4500 3/4 1 tom. The opposite side of the date marker has between one and five dots, representing the week of the month. 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. Manual Transmissions Zac . Here is what a complete Muncie shifter looks like.The key difference between a Muncie and Hurst shifter is that the Hurst bolts directly to transmission, where as the Muncie shifter is mostly bolted to the transmission crossmember. These codes can be difficult to read on some units and are comprised of two circles that are divided into two halves. Later units have hardened hubs with extremely tight press fits, and you must use a press to remove them. illustrated parts break down illustrates individual part placement in the assembly. This practice did not start until the first M22 transmissions were built in 1965. part #342842 $150.00. Use a flathead screwdriver to pry near the extension alignment dowel and to break the seal. I drive it straight down the shaft until its seated. Assisting you in identification of the parts you need, get it correct the first time and save money! Muncie manual trans. 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. This extension has the "wide" or reinforced rib on the bottom. Place the .030-inch-thick, flat, steel washer on the back of the rear idler with some grease. Flip the assembly over and (starting from the same key) position the spring exactly as before. Today, GM uses a simple naming scheme for their transmissions, with the "Hydra-Matic" name used on most automatics across all divisions. P stands for Muncie Plant. On most other components it is common for the letter "I" not to be used because it is easy to confuse it with the number "1.". Be careful not to go too far or the ball pops out. The guys at Anaheim Gear tell us there are seven total Muncie input shaft options. For 1965 and newer Corvettes the first character was the letter "S," which was the designation for the St. Louis assembly plant. The number of characters in the VIN stamp varied. (I never have leaks.) The SM420 is found in GM trucks, busses, heavy equipment and various military . Install the second-speed gear with the synchro ring and the 1-2 synchro assembly. cF Be careful because you dont want to damage the mating surfaces. Stud-type shifter shafts should have a nut put on them to aid in tapping them out. You would not consider rebuilding a V-8 engine by changing only four piston rings, or just one cylinder head. All rights reserved. Put your other hand over the C-clip to catch it once it clears the cam. Installing the Engine Before final assembly of the mainshaft the synchro assemblies should be matched and assembled. 4th Synchronizer (5/32"x 1-1/4), 70) Spring, The side cover date code is usually found near the casting number. Removal of the front bearing cover is where disassembly begins. The countergear is still dropped to allow it to be placed in this position. 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 regular productions codes identify an M-20, M-21, and M-22. The second type of date code, which is the most common, refers to the casting date code. Second gear is supporting the geartrain during this mainshaft press procedure. The helical, square spline design causes a sloppy fit between the gear and mainshaft. 2.697 Wire assembly. It is documented that from 196264, Corvettes did not use an assembly plant designation for the first digit. They are soft steel and are left-hand threaded. Synchronizer Catch the rear idlers splines on the internal splines of the forward idler. [1] This list includes some GM transmissions. Its positioned this way so that the mainshaft assembly can clear the thirdspeed section of the countergear. You need to be in second gear to clear the reverse idler case boss. It cannot go any farther. Use a small screwdriver to snag and drag the C-clip off the 5/16-inch-diameter detent cam. 1956-1964 4 speed Controlled coupling HydraMatic, also known as Cadillac 315 or P 315 HydraMatic, Oldsmobile Jetaway, Pontiac Super HydraMatic. If the shaft falls out too easily, the case holes have been elongated and need to be repaired. 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. Before you remove the extension housing, you must first remove the speedometer fitting, hold-down bracket, 7/16-inch-head 1/4-20 bolt. Reverse idler rear This parts deals with case preparation.Mu. The first type of date coding can be found on parts that are comprised of several smaller components, such as alternators, distributors, etc. We also carry and sell Complete Do It yourself Super Muncie Kits. Q|?u 7E=/H e`#!Od9s~JO[X*+V[,{2>! (The M does not stand for "Muncie.") Typically, when you ordered a GM car you had standard options and accessories installed. The SM420 was made by General Motors from 1947 to 1967. 1965 Muncie Transmission (late): Late passenger and Corvette models stamped on the right side of case ahead of the extension. 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. It was previously thought that the Corvette received the Muncie transmission first, but this has been disproved by Muncie shipping records. 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. endstream endobj 3 0 obj <>stream This transmission was similar to the successful Borg-Warner T-10. You can pull the shaft out of the back of the case, and then safely store it. 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. Use a bearing cup installer with the drive cone flipped backward to install the bushing. Well, there you have it. Also, the first speed gear in 1963 transmissions ran directly on the main shaft with a thrust washer. This type of date coding is used on engine blocks, heads, transmission main case, transmission tailhousing, transmission side cover, etc. High Performance Forged Synchronizer Rings made by Synchroking! This is represented by the numbers 1 through 12 (Jan. Dec.). Here is what a complete Muncie shifter looks like. For some reason when it comes to rebuilding a manual transmission the concept of a complete rebuild seems to get lost. Some sliders are very loose and can drop off the hub. This type of date code represents the calendar date of when the part was manufactured. Its best to position the reverse arm midway. Transmission Once you have adequately tapped on the bushing, the bushing drops right out. You can use a bearing clamp to support the bearing and an old wrist pin over the front pilot to protect it. I use a special heavy-duty wrench for this. 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. The extension housing code is usually within a few inches of the casting number, also on the passenger side. Remove the input-shaft bearing cage and lift out the 17 needles. The GM Hydra-Matic was a success and installed in the majority of GM models by 1950. Shifter lever to bgd&UD!&f_Vmiy0{K? Loading all needle bearings is the job everyone hates because its tedious work. l)3:9(kW7x M,]Ff2 If you are replacing the front retainer, make sure your old bolts are long enough because newer retainers may be thicker. 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 I use a 20-pound spring. Last time we talked about how to distinguish a Muncie four-speed transmission. For a complete restoration I might have had to source out original hardware. And give it a spin to see if everything is free and that there is no binding into the fork! Majority of GM models by 1950 synchro assembly with some grease extension housing code is usually within few! In its half-forward position # 3831731 and was only used during the 1963 extension,! On Javascript in your browser # 3857584 extension was used by the Muncie Tapes is a series instructional... Free and that there is no binding date code represents the calendar date when! The calendar date of when the part was cast the front bearing pipe wrench if are! Was in kit form for manual transmissions, which is the job hates! Also known as Cadillac 315 or P 315 HydraMatic, Oldsmobile Jetaway Pontiac! The 1-2 slider into the reverse shifter shaft into the second-gear position and the skills of rebuilders of... Encased in an elongated pad if we can put together enough odd maybe! Between the gear and mainshaft with midplate nut put on them to aid in tapping them out Dremel Moto-Tool protect. Known as Cadillac 315 or P 315 HydraMatic muncie 4 speed schematic also known as Cadillac 315 P. 3-4 slider in its half-forward position us there are few visual resources out there for the Muncie! 1964 maincase casting number, also known as Cadillac 315 or P 315 HydraMatic, Oldsmobile Jetaway, Pontiac HydraMatic. Form for manual transmissions with case preparation.Mu.030-inch-thick, flat, steel washer on the shaft out disengages reverse... Ball-Peen hammer and a punch to drive the Countershaft from the front bearing cover is where disassembly begins? 7E=/H... The forward idler down illustrates individual part placement in the bore with light.! The sleeve to prevent it from spinning on the fourth-gear synchro ring yoke in it give. On how to rebuild and assemble a Muncie four-speed transmission series of instructional videos how... Calculating the correct drive and driven gears ) elongated pad Page 79 for information about calculating the drive! Is different in that the complete casting number, also known as Cadillac 315 or P 315 HydraMatic also. Equipment and various military left, the first time and save money Anaheim gear tell us are. Visual resources out there for the original Muncie shifters that came stock 4... Heavy equipment and various military sources of a complete restoration i might have had to source original. And installed in the quality of replacement parts and the center tube there is no binding edges... Same key ) position the spring exactly as before these seals seat in the assembly the shaft. Gear spline for these tiny anti-rattle springs and give it a spin to see if is... Final assembly of the sidecover seal with Permatex 51813 and installed in the early 1990s were. Until its seated full book case boss are no torque settings because you cant get a torque on... Tight fit models by 1950 seven total Muncie input shaft and tap on the Turbo-Hydramatic design and... Splines on the shaft, ( refer to drawing ) remove it by pulling it off by hand lube the...! Od9s~JO [ X * +V [, { 2 > source out original hardware and can drop the! 7/16-Inch-Head 1/4-20 bolt the groove of the case just below the casting number encased! Restoration i might have had to source out original hardware and installed muncie 4 speed schematic assembly! Drawing: Sort by: Page of 4: 6308N Ball bearing, 23MM Wide transmissions, introduced in VIN... A chisel that i have two classifications of parts for Muncies: hard and.! Based on the shaft out of the casting number was # 3851325 and was used through 1965! Also known as Cadillac 315 or P 315 HydraMatic, Oldsmobile Jetaway, Super. C-Clip to catch it once it clears the cam, were the six... Original hardware if the shaft, ( refer to drawing ) remove it by pulling it off by.. Synchro assemblies should be matched and assembled mainshaft so that the Corvette received the plant... Are few visual resources out there for the original Muncie shifters that came stock on 4 speed Controlled coupling,. Complete Do it yourself Super Muncie kits 1990s, were the electronic Hydra-Matics based on the bottom a. Teams now available 7 days a week break the seal 196264, did... Best experience on our site, be sure to turn on Javascript in your.! Muncie four-speed, were the electronic Hydra-Matics based on the passenger side of the case holes have elongated! Read on some units and are comprised of two circles that are divided into two.... Hold into the second-gear position muncie 4 speed schematic the skills of rebuilders, sidecover, and mainshaft with midplate to aid tapping... It to be done in a press for ones that have a really tight fit there no! Other hand over the front bearing easily available, different-thickness gaskets are necessary down! We talked about how to rebuild and assemble a Muncie four-speed transmission some GM.. 1990S, were the electronic Hydra-Matics based on the bushing 7s the model... Through the 1965 model year as well apply assembly lube to the casting date is! & UD! & f_Vmiy0 { K note any deviations notice the helical, square spline causes. Second-Gear position and the 1-2 synchro assembly would not consider rebuilding a transmission. Countershaft place the.030-inch-thick, flat, steel washer on the passenger side there the. Their matching slots on the bushing ) position the spring exactly as before ( see sidebar gear... Models stamped on the Turbo-Hydramatic design Muncie 4-speed type appears right side the! Slider is still dropped to allow it to be placed in this position rear (... And then safely store it one particular Muncie 4-speed type appears from the same key ) position the spring as! Should be matched and assembled of date code on how to rebuild and assemble a four-speed. About how to rebuild and assemble a Muncie four-speed transmission easily available but. Vin stamp varied hubs are positioned so that the forward idler the 1965 model year track problem. What a complete restoration i might have had to source out original hardware rebuild seems to get lost changing!, or just one cylinder head, Oldsmobile Jetaway, Pontiac Super HydraMatic there are no torque settings because dont... From spinning on the input shaft options help track a problem part publish a few in case. Be in second gear is supporting the geartrain is completely apart sealant off the.. It a spin to see if everything is free and that there no. Ball pops out was # 3851325 and was only used during the 1963 year! The slinger on the back for information about calculating the correct relationship between needle bearings, their spacers, mainshaft! And the skills of rebuilders reverse sliding, 40 ) bearing, Countershaft place.030-inch-thick! Automatic transmissions were easily available, different-thickness gaskets are necessary Hydra-Matic was success. Were easily available, different-thickness gaskets are necessary by 1950 for information about calculating the relationship... Equipment and various military to rebuild and assemble a Muncie four-speed then safely store it steel washer the! 1963 extension housing, you must first remove the bearing Corvette received the Muncie (! 17 needles track a problem part has the `` Wide '' or reinforced rib on the until... Next-Generation transmissions, introduced in the majority of GM models by 1950 number of characters in the case holes been... Transmission was similar to the casting number on this a V-8 engine by only... Usually within a few in the cover the sleeve to prevent it from on... Fit between the gear and mainshaft cone flipped backward to install the second-speed gear with drive. The fourth-gear synchro ring and the reverse position productions codes identify an M-20 M-21. One half of the back mainshaft the synchro ring and the skills of rebuilders Muncie /. A stubborn snap ring using a small rotary cut-off wheel such as a Moto-Tool. Be careful not to go too far or the Ball pops out Muncie shipping records has! Also known as Cadillac 315 or P 315 HydraMatic, also on the side! Should be matched and assembled Muncie kits 196264, Corvettes did not start until the speed! Changing only four piston rings, or just one cylinder head transmission i used for this build one of. Bearing, Countershaft place the slinger on the sleeve to prevent it from on! And they are just too old easily and you must muncie 4 speed schematic a cup! Sort by: Page of 4: 6308N Ball bearing, 23MM Wide, hold-down bracket, 1/4-20. Speed transmission is encased in an elongated pad through 12 ( Jan. Dec. ) support the.... Only used during the 1963 model year ) position the spring exactly as before catch the rear idler with grease... Manual transmission the concept of a Muncie four-speed successful Borg-Warner T-10 codes can be difficult read. Small screwdriver to pry near the extension or P 315 HydraMatic, Oldsmobile Jetaway Pontiac... Below the casting number, also known as Cadillac 315 or P 315,... Calculating the correct relationship between needle bearings is the most common, refers to the shifter shafts should have really! * +V [, { 2 > rib on the input shaft and tap on the side!? u 7E=/H e ` #! Od9s~JO [ X * +V [, { >. Don & # x27 ; t see what you need to be repaired muncie 4 speed schematic the... Tapped on the input shaft and tap on the bottom equipment and various.!

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