The GM Hydra-Matic was a success and installed in the majority of GM models by 1950. If they are really bad you should change them out. h QQQ111ppp999 OOOrrr333'''^^^[[[ iii>>>555KKKIII???###&&&{{{"""***MMMgggkkklll___AAACCCsss===]]]ccchhhYYYHHHVVVjjjLLL$$$)))fffRRRdddPPP666EEE+++XXX(((ZZZTTTeeeDDD%%%000aaa888SSS444FFFwwwBBB<<777:::;;;uuummmbbb\\\ttt```!! These have a tendency to fly off the cover and get lost. I like to use lock washers even though the factory never used them. Others require a press. Most front nuts are seized onto the shaft. Install the second-speed gear with the synchro ring and the 1-2 synchro assembly. %%EOF (See sidebar Speedometer Gear Calculations on page 79 for information about calculating the correct drive and driven gears). Another way to confirm that the transmission is original to your car is most Muncie four-speed transmissions will have a Vehicle Identification Number (VIN) number stamped on the main case. endstream endobj 4 0 obj <>stream 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. endstream endobj 1 0 obj <> endobj 2 0 obj <>stream Be careful not to damage the bore. Use snap-ring pliers to remove the outer snap ring from the front bearing. NOTE: We have included the 1966-74 Muncie identification above for reference usage only. This is represented by the numbers 1 through 12 (Jan. Dec.). When I begin disassembly of a transmission, the first thing I do is visually inspect the transmission for broken bolts, cracked castings, oversize bolts that compensate for stripped threads, signs of oil leakage, and paint. For passenger-side speedos the gear is positioned at the rear of the ground surface; for the driver-side speedo, its positioned toward the front. gear sleeve oil, 66) Nut, Shifter 5ET50 (MKE) - Electronically controlled, continuously variable automatic transaxle Transaxle (Full Hybrid, 4EL70 (MRD) - Electric Drive Unit Transmission (PHEV, Tremec M1L transmission 8-speed Dual-Clutch made by, GM VT40/CVT-250 (RPO MRD) Introduced in 2019 , Aisin AR5/MA5 5-speed longitudinal manual made by, This page was last edited on 22 December 2022, at 04:17. Some sets have two .015-inch gaskets that can be stacked. bearing, 8) Bolt, Bearing %PDF-1.2 % shaft synch. 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. m20 m21 m22 '63-'74 4-speed manual transmissions: overhaul kit. 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. The 3-4 slider and keys fell out when I removed the mainshaft. You must be observant and methodical as you go through the disassembly of a Muncie 4-speed. hT1O0ol\|:#10P,t45 u"@o]Ive"3-BCU_DWJMU^%{_B$F#UBK+%X.:5ss:azvc88,5n(.K}' _)qYeb-UP7 I 2nd Synchronizer, 31) Hub, 1st &2nd The year of production was not coded on these transmissions. MIDWEST MUNCIE Specializes in ONLY MUNCIE 4-SPEEDS unlike any other transmission builder and has been specializing in restoration and building of Muncie 4 speeds since 1976. 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. shifter You can use an exhaust pipe separator chisel and small chisel to remove the extension housing bushing and rear seal. Well, there you have it. Hb```"%"A1e W)1m[+*$0M!Q Pkn$SIVbv%y\ex-Df5scm[6a]BL^A^ Td(()QR d`.W }d8 YST9{6LZ> PVW endstream endobj 70 0 obj 225 endobj 53 0 obj << /Type /Page /Parent 48 0 R /Resources 54 0 R /Contents 59 0 R /MediaBox [ 0 0 612 792 ] /CropBox [ 0 0 612 792 ] /Rotate 0 >> endobj 54 0 obj << /ProcSet [ /PDF /Text ] /Font << /F3 56 0 R /F4 61 0 R /F5 63 0 R >> /ExtGState << /GS1 67 0 R >> /ColorSpace << /Cs5 57 0 R /Cs9 58 0 R >> >> endobj 55 0 obj << /Type /FontDescriptor /Ascent 807 /CapHeight 754 /Descent -249 /Flags 262176 /FontBBox [ -140 -261 1195 990 ] /FontName /CCKOCC+Futura-CondensedBold /ItalicAngle 0 /StemV 141 /XHeight 505 /CharSet (/C/three/R/F/D/comma/four/quotedblleft/E/S/G/hyphen/ampersand/quotedblri\ ght/K/U/I/A/six/space/V/seven/parenleft/L/H/M/parenright/one/nine/P/N/O/\ B/T/colon) /FontFile3 65 0 R >> endobj 56 0 obj << /Type /Font /Subtype /Type1 /FirstChar 32 /LastChar 240 /Widths [ 245 246 360 490 490 858 590 250 300 300 376 490 245 318 245 547 490 490 490 490 490 490 490 490 490 490 245 245 490 490 490 454 833 528 479 452 530 392 394 563 555 255 352 513 373 722 573 582 487 582 530 440 414 544 565 793 545 514 508 320 250 320 490 500 300 433 433 315 433 414 299 437 424 209 209 440 210 639 424 436 433 433 315 376 308 423 452 694 489 452 401 300 250 300 490 245 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 490 490 0 0 0 0 0 830 0 0 0 245 0 0 245 490 245 245 0 423 245 245 245 245 245 0 0 245 0 0 0 0 0 245 0 245 245 0 0 0 245 0 0 0 0 0 0 0 491 491 0 0 0 245 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 245 ] /Encoding /MacRomanEncoding /BaseFont /CCKOCC+Futura-CondensedBold /FontDescriptor 55 0 R >> endobj 57 0 obj [ /CalRGB << /WhitePoint [ 0.9505 1 1.089 ] /Gamma [ 2.22221 2.22221 2.22221 ] /Matrix [ 0.4124 0.2126 0.0193 0.3576 0.71519 0.1192 0.1805 0.0722 0.9505 ] >> ] endobj 58 0 obj [ /Separation /All 57 0 R 68 0 R ] endobj 59 0 obj << /Length 1173 /Filter /FlateDecode >> stream synchronizer Let me explain. Lift the countergear out of the case. 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. 2.698 Backup Light Switch. 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. bearing retainer It is importing to understand that most all Chevrolet parts have some kind of date coding cast or stamped into the part. Loading all needle bearings is the job everyone hates because its tedious work. 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. This page is not available in other languages. 5ET50 (MKV) - Electronically controlled, continuously variable automatic transaxle (Second Generation Chevrolet Volt). Notice the way Im gripping the punch while tapping the bearing. If you are going to change a 45-year-old front bearing it is in your best interest to change all the bearings. 1. 33),WrPc J+lv&*iYk^5lmi)VA.f/|g% Chevy Muscle Car Tech Tips, Guides, Articles & How-To. The midplate is preassembled with the rear bearing. It is the successor to the old "New Process" gear company. Be careful not to go too far or the ball pops out. Read further about Chevrolet's favorite gearbox. So any recommendations on LS style . For the best experience on our site, be sure to turn on Javascript in your browser. Move the 1-2 slider into the second-gear position and the reverse shifter shaft into the reverse position. It remains tacky even when the air temperature is high. Nv 3500 1/2 ton nv4500 3/4 1 tom. Place a new locating snap ring in the midplate, spread it open, and start the rear bearing in the bore. hXyp%X shaft, 64) Lockwasher, Check for any nicks and deburr all rough edges. h|RKS0Wc3XHkY9I`&4a8e42,h^VL9 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. The number is #3831707. The SM420 is an impressive, heavy-duty truck transmission designed for and used in , 3/4, 1 and 2 ton trucks. To set up synchronizers, start by placing one key in first and then the other two keys as you wrap the spring around them. We provide parts in three separate categories for the Muncie M20 4 Speed: Overhaul kits by application include standard kits, heavy duty kits for more horsepower and "WS" kits that include both bearings and syncro rings as well as gaskets and seal s. IDENTIFICATION - CHEVROLET 4spd, RWD, M20, Muncie, aluminum case, 7 bolt side cover Check that they are flush against each other. 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. fits all muncie m20, m21, & m22 models; includes gaskets, & seals; also includes smaller bearing retainer gasket for some very early units with smaller retainer; 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. Its best to position the reverse arm midway. The original components are no longer available, but that doesnt mean you cannot get high-quality parts today. bgd&UD!&f_Vmiy0{K? \;1"89ek5YAwG Rv($|)d I noticed that rebuild kits for engines and automatic transmissions were easily available, but nothing was in kit form for manual transmissions. Make sure the backside of the teeth faces the thrust washer. I use the case to support the cover when I press in the sidecover seals with a 17-mm socket. assy., Transmission Shifter lever to If the gear and hub do not come off, do not use a hammer to try to remove them. If you have shafts that operate a TCS switch, make sure the correct shafts are in their matching bores. 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 I still don't know what clutch that I'm going to use, though. Copyright 2022 Ecklers Automotive. The remainder of the Corvette VIN stamp was the last six digits of VIN, i.e. You have to remove this pin from the bottom. Once I fully chamfer and deburr the gear, I install the forward reverse-idler thrust washer and hold it in place with grease. MUNCIE M-20/M-21 EARLY, G.M. The VIN will be located on the top or side of the main case. 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. 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. Written by Paul Cangialosi and Posted with Permission of CarTechBooks. 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. reverse shifter, 63) Lever, Transmission In fact, most current parts exceed the fit and finish of the original GM parts. The Muncie casting date codes are very different from the codes any of the other transmission vendors Chevrolet used. If the transmission goes together with the sliders installed incorrectly, the worst thing that happens is that when you go to fit the sidecover on (the last step), nothing fits. muncie. 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. Pulling the shaft out disengages the reverse fork from the reverse gear. shifting Place third gear and its synchro ring on the mainshaft. Corvettes saw installation by May through June of 1963. By doing it this way, you use the reverse gear to press the speedo gear off and avoid any damage to the gear. Place the .030-inch-thick, flat, steel washer on the back of the rear idler with some grease. This type of date code represents the calendar date of when the part was manufactured. gaskets & seals . retainer, 12) Nut, Clutch Your #1 Source of Restoration and Restomod Parts! There are no torque settings because you cant get a torque wrench on this. If the shaft falls out too easily, the case holes have been elongated and need to be repaired. Extension housing castings are prone to cracks around the reverse shifter shaft boss. You can use a chisel to easily remove them. Step 2: Remove Sidecover The sidecover alignment dowel is located below the upper right bolt. 1. They are soft steel and are left-hand threaded. lever to shaft Never strike the input shaft itself. The last detail is to install the speedometer fitting and speedometer gear. Muncie manual trans. If you have an odd code on any component send me a high-resolution photo, I am always learning and appreciate the unusual. (Part of #54), 56) Seal assy., Not for passenger car as some self proclaimed specialists may think. A Dremel or rotary tool is helpful for deburring gears. 1967-1974 production codes will start with the letter P and have five numbers, for example: P9D09. It cannot go any farther. Viola! The store will not work correctly in the case when cookies are disabled. gear thrust, 50) Gear assy., 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. 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. 146 0 obj <> endobj Huge variations exist in the quality of replacement parts and the skills of rebuilders. Install the rear bearing. Trans. NVG 4500 I think, made in same plant as the "Muncie 4 speed" back in the day. Transmission 2. MUNCIE 4-SPEED MANUAL TRANSMISSION ASSEMBLIES, GEARS & PARTS APPLICATIONS: GENERAL MOTORS 1963-1974 GENERAL MOTORS (HIGH PERFORMANCE) AUTO GEAR EQUIPMENT 530 State Fair Boulevard, Syracuse, New York 13204 (800) 634-3001, Inside New York: (315) 471-8141

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