Muncie 4 Speed Identification CodesI have a Muncie tranny and I'm trying to identify which model it is. Muncie RPO Codes 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). Manual Transmissions ~ The 1966 Chevelle Reference CD. Show All Show All Side Cover Casting Numbers It is easy to determine an early. 70SSTHUMPER. with a18S101350 or a 28N12950. The Muncie was the top high-performance manual transmission General Motors offered in its muscle cars of the 1960s and early 1970s. GM Transmission RPO Codes start with the letter M. The reason the style of the transmission is important is for transmission lever and shifter installation parts identification. low std or 254 first gear has two 220 first or close has one if it has a fine spline input with 4oo yoke its a 70 or later till 74 the last 4 being the strongest. Manual Transmission Gear Ratio Charts for GM & Chevy Vehicles. Casting #3729001 Chevy 168 Tooth Cast Iron Chevy 168 Tooth Casting #3733365 55-57 Chevy Pass. Muncies are the hot tip, since they usually were used with high performance engines. Muncie 4-speed identification. It has: 3885010 US Patent No 3088336 General Motors Corp GM 3884883 GM 3846429 on the tailshaft. This is the location of the date code stamped on the case of a Muncie transmission. 4-SPEED TRANSMISSION I. com/albums/n175/devildog320/Tailshaft_zpsc36bc322. How to Identify a Muncie Four Speed: Build Date Codes, VINs. Box #28 on the Buildsheet will reflect the 2 letter code as well. JPG 446209-blue69Ztranyassydate. 1963-67 DECALS, LABELS, INSTRUCTIONS & TAGS Transmission Identification Tag Transmission Identification Tag TAG - #3831703, Muncie 4 speed, 250-300hp, after #12000:. 04 represents the month code when the. 4-Speed Transmission Decoding CHRYSLER’S A-833 4-SPEED TRANSMISSION It is of utmost importance that you determine which year of production and which version of transmission you have. The code will tell you which particular year the transmission was built for. a m 22 has no rings on input. How To Identify Chevy Four. Mastering GTO Restorations: Transmission Guide. The final incarnation of the muncie lasted until 1973 when the transmission was taken out of service. Muncie Trans Identification Tags (1963. It will usually begin with a 18S101350 or a 28N12950. 1964 to 1968 Muncie 4-speed. P represents the manufacturing plant, Muncie. Muncie M22 — 4-speed longitudinal heavy duty close ratio manual transmission made by GM at their Muncie, Indiana factory Saginaw M26/27 transmission — 3 and 4-speed longitudinal light duty (less than 300 hp) wide ratio manual transmission made by GM at their Saginaw, Michigan factory Muncie M62/M64 — 3-speed longitudinal transmission made. Pre ‘69 Muncie’s use a stud & nut at the indicated attachement point, while ‘69 and later Muncie’s use a bolt as illustrated on the right. 4 speed manual transmission identification numbers">Gm 4 speed manual transmission identification numbers. Also, it will have a partial VIN on it that will identify whether it came from a Chevy, Pontiac, or other GM. Before you here are the basics of Muncie M20, M21, and M22 four-speed transmissions. Before you here are the basics of Muncie M20, M21, and M22 four-speed transmissions. Four speeds were available in GTO’s, notably the Muncie M20 wide ratio, M21 close ratio and M22 rock crusher, and automatic fans had either a two-speed Powerglide from 1964 through 1966 or, from 1967 on, the three-speed Turbo-Hydramantic M40 option, which would become known as the “Turbo 400. They will tell you if it is a M20, M21, or M22. and Other 69 GM Cars Casting Numbers Correct Muncie 4 Speed M21 CLOSE. How to Identify a Muncie Four Speed. The M-20 wide ratio, the M-21 close ratio, and the "Extra heavy duty close ratio" M-22, also known as the "Rock Crusher". This equates to April 23, 1974, M21 ratio. Muncie Transmission Id and ratio guide. 43 first gear ratio has two grooves, the 2. 20:1 HD Close Ratio (M22), aka "Rockcrusher". Pre-1969 Muncies use a stud and nut at the indicated attachment point, while 1969 and later boltPRE 69’ MUNCIE & ALL 69’ & LATER MUNCIEMuncies use a bolt as illustrated on the right. There were usually two “broadcast code” letters added to the end of the part numbers on the tag. Check the numbers on a Muncie. This is the location of the date code stamped on the case of a Muncie transmission. Transmission: C3 Corvette Restoration Guide. There are adapters (our part #242) to allow use of bolt style levers on a stud style. This is the location of the date code stamped on the case of a Muncie transmission. (example: P7A14- Muncie 1967, Jan 14) Muncies assembly codes are model year. Muncie 4-speeds were produced in two different ratios wide-ratio (M-20) and close-ratio (M-21). Tailshaft Housing Casting Numbers: Casting Number: Year: Notes: 3831731: 1963: Thin Fin Tailshaft, Driver-Side-Mounted Speedometer, 27 Spline: 3846429:. Glean the basics and use them in your research. This had the same gear ratios as the M21 but with a heavy duty gearset. 1964 to 1968 Muncie 4-speed transmissions can be identified from later models by the way the transmission arms attach.   Chevy Corvette Camaro Chevelle Full Size Pontiac, Firebird, GTO, Tempest, Olds 442, Buick, Etc. Muncie Transmission Casting Numbers. Longitudinal transmissions [ edit] Aisin AR5/MA5 — 5-speed longitudinal manual made by Aisin. Muncie 4 Speed & GM Manual Transmissions Buy Sell Trade. The Muncie 4-speed transmission was used with many different GM models and engine combinations from . The code on the Muncie should be P9MddA. I use an M21 in one of the cars. Hi everyone, I have a Muncie 4-speed with an inline Hurst shifter that has been in my 1978 Camaro Z-28 since I bought the car in 1994. The early production Muncie four-speed case is the small-bore unit and can be identified by the. The partial vin code ties this component to a specific vehicle. Early Muncie side covers had a vehicles factory automatic type fwd shift pattern & manual 727 Mopar Transmission Casting Numbers. 4 speed (aluminum): Right side of maincase stamped sideways in front of extension housing. Identifying GM 4 Speed Transmissions. Muncie RPO Codes 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). All wide ratio transmissions are designated M20 and close ratio transmissions are designated M21 or M22 depending on the gear set. Side covers were sometimes secured with studs and nuts, other times with bolts. BORG-WARNER SHAFTSTRANS ID 452,453. Muncie 4-Speed. That being said, there was a second, close-ratio version (M22) that was developed to survive duty behind engines with a higher torque output, and was known as the “Rock Crusher. 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. This group was designed for the Muncie & Borg Warner T10 4 Speed and GM manual transmission enthusiast. Aluminum 1st Aluminum Chevy Bell Casting #3779552 60-62 Chevy Pass. Muncie transmission calendar date codes. It is easy to determine whether you have an early or later model Muncie four-speed transmission by the way the transmission's linkage arms are . The VIN number will usually be a low number. I'm sorry i'm sure this has been asked before, but i am looking for some verification about this muncie 4 speed i bought for my car. Muncie 4-speed Identification To distinguish between Muncie types, if the Muncie was built after 21-Oct-1968, the transmission code contains one of three letters at the end of the build code: A = 2. The early production Muncie four-speed case is the small-bore unit and can be identified by the GM casting number 3831704 (see Muncie M20/M21/M22 Main Case Identification chart). The above Muncie 4 speed transmissions can be distinguished from the style of the transmission arm attachment. Good luck finding one with the correct dates! See more Reply Save Like 6 68 Ragtop · #7 · Sep 2, 2014 It should also be a wide ratio 4 speed Reply Save Like 6 69huggerdude. Camaro Transmission Information & Restoration. Further Muncie identification 3 Muncie 4 speeds were offered. Complete Muncie Transmission Units. Muncie RPO Codes 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). it's a wide ratio, going for 6-1200. com">MUNCIE TRANS INDENTIFICATION. Thread starter devildog320; Start date May 22, 2014; May 22, 2014 #1 D. PRE 69’ MUNCIE & ALL BORG-WARNER SHAFTS TRANS ID 451 69’ & LATER MUNCIE. C2 Corvette Muncie Trans Identification Tags (1963. 1969-1973 Typical date code: P9B08C P-muncie 9-1969 B-February 08-Eighth day C-M22 MODEL IDENTIFICATION(1969-1972) A-M20 B-M21 C-M22 Note: not always stamped Originally, identifying the transmissions by external markings was simple. The Muncie four-speeds are a very popular transmission with Chevrolet muscle car enthusiasts, and are easily adaptable for a wide range of GM and other non-GM vehicles. CHART 5-SPEED TRANSMISSION I. Four speeds were available in GTO’s, notably the Muncie M20 wide ratio, M21 close ratio and M22 rock crusher, and automatic fans had either a two-speed Powerglide from 1964 through 1966 or, from 1967 on, the three-speed Turbo-Hydramantic M40 option, which would become known as the “Turbo 400. If you see any errors, or would like to add an RPO code, just leave it in the comments and I’ll throw it on. To confirm this simply look at the VIN number. One more way to identify the Muncie is via stamped codes in the case, which indicate when the transmission was built at Muncie (see How To Read Muncie Build Date Codes chart). Good luck finding one with the correct dates! See more Reply Save Like 6 68 Ragtop · #7 · Sep 2, 2014 It should also be a wide ratio 4 speed Reply Save. These letters did coincide with the broadcast code letters called out on the build sheet in. The serial number is a date code. Check the numbers on a Muncie. Transmission Identification. Of the regular production codes, one particular Muncie 4-speed type appears. Note 1: M-20 gear ratio: 1st 2. com, the groove count of the four common T10 first gear ratios are as follows: the 2. 1963-67 DECALS, LABELS, INSTRUCTIONS & TAGS Transmission Identification Tag Transmission Identification Tag TAG - #3831703, Muncie 4 speed, 250-300hp, after #12000:. The date code stamp is P0A28A January 28, 1970 3925661 main. The early production Muncie four-speed case is the small-bore unit and can be identified by the GM casting number 3831704 (see Muncie M20/M21/M22 Main Case Identification chart). Muncie 4 Speed Transmissions. Manual Trans Reference GM 3, 4, 5 and 6 speeds V24 How to identify chevrolet gmc manual transmissions Use the following information to compare physical description of your Chevrolet or GMC manual transmission in order to identify what model transmission is in your vehicle. Muncie 4-Speed The regular productions codes identify an M-20, M-21, and M-22. Complete Guide to Muncie Transmissions. Muncie 4 speed serial numbers begin with the letter "P". The above Muncie 4 speed transmissions can be distinguished from the style of the transmission arm attachment. The case number is 3885010, it is. This means the Muncie was assembled December 13, 1967 for the 1968 model year. Muncie 4-Speed The regular productions codes identify an M-20, M-21, and M-22. P = Muncie 9 = 1969 M= Month of build dd= Date of build A= M20 / B=M21 / C=M22 Those are the primary numbers you need to worry about. A properly set up M-22 Rock Crusher transmits up to 700 hp, so this stout transmission is a wise choice for high-performance applications as well as authenticity. *MUNCIE Shaft Identification: Muncie 4-speed transmissions can be distinguishedvfrom the style of the transmission arm attachment. blubu Reply Save Like S shawney1986 Discussion Starter · #13 · Apr 19, 2014. 3741458 Cast (3741458) History: 3851326 use 3915020 06-67. Save davewho1 · #15 · Mar 23, 2017 Save 1 71454Chevelle. TH350- original motor car, #43 Gulf. Muncie 3-speed = on the boss above the filler plug Muncie 4-speed = on the right side of the case at the right side of the cover flange Saginaw 3- and 4-speed = on the lower right side of the case next to the rear cover Powerglide = on the upper flange of the transmission housing converter opening. Find many great new & used options and get the best deals for 65 Corvette Chevelle GTO Muncie 4 Speed ID Tag 3841435 at the best online prices at eBay! Free shipping for. 65 Corvette Chevelle GTO Muncie 4 Speed ID Tag 3841435. The extension housing code is usually within a few inches of the casting number also on the passenger side. Muncies are the hot tip, since they usually were used with high performance engines. Trans Code Format: tymdds where: t = transmission type MANUAL AUTOMATIC S = Saginaw 3-speed A = 68/69 L6 Torque-Drive K = McKinnon 3-speed C = Cleveland Powerglide H = 69 Muncie HD 3-speed T = Toledo Powerglide R = 4-speed Saginaw B = Cleveland TH350 P = 4-speed Muncie X = Cleveland TH350 Y = Toledo TH350 y = model year (not calendar year) m = …. The Muncie four-speed was produced in two ratios: the wide ratio (M20) and the close-ratio (M21). GM Transmission RPO Codes start with the letter M. Pre-1969 Muncies use a stud and nut at the indicated attachment point, while 1969 and later Muncies use a bolt as illustrated on the right. Nov 22, 2014 #6 Camaro-Chevelle Veteran Member. The additional letter codes as follows: Muncie 3 speed Manual : Muncie 4 speed manual transmissions: Suffix : 1st gear ratio: A : 3. This is a Completely and Freshly Professionally Rebuilt Original 1970 M20, (M-20), Muncie Wide Ratio 4 Speed Transmission, (no aftermarket or imported gears). 3919384 - M20 with production V8s (meaning the base small block and a Saginaw) 3919390 - M20 with RPO L30 - L73 (327 275/250 engines with a Muncie) (L78 added on 2/15/67) 3915079 - M20 with L78 3915085 - M21 with L78 3925626 - M22 with L78 Might note there's nothing listed for the L79 so that could be applicable with this particular tag. 1970 Muncie 4 Speed Transmission 3925661 1/28/70 P0A28A ">1970 Muncie 4 Speed Transmission 3925661 1/28/70 P0A28A. Manual Trans Reference GM 3, 4, 5 and 6 speeds V24 How to identify chevrolet gmc manual transmissions Use the following information to compare physical description of your Chevrolet or GMC manual transmission in order to identify what model transmission is in your vehicle. *MUNCIE Shaft Identification: Muncie 4-speed transmissions can be distinguishedvfthe rom style of the transmission arm attachment. The final incarnation of the muncie lasted until 1973 when the transmission was taken out of service. The gear ratios ultimately identify the T10 in question. All 67-74 Muncies carry a producion code number stamped vertically on right side of case beginning with "P". How to identify chevrolet gmc manual transmissions. The case number is 3885010, it is a 10 spline input shaft with 1 ring on it. Can anyone tell me where i can find nfo for decoding metal 4 speed tags for muncie m20 21 and 22. The M22 was produced in 1973 and 1974 for other GM divisions. Can anyone tell me where i can find nfo for decoding metal 4 speed tags for muncie m20 21 and 22. 4 speed Saginaws no lines= 2. P7C09 (March 9) date stamping on a 1967 Muncie 4-speed transmission; (1967 was the first year to have the year stamped in the date code and the month represented by a letter code). For your information, a few Muncie 465 casting numbers include: 3871912, 3901127, 673212, 6273212, 3901131, 465453, 8672267, 867287 (aluminum top cover model) About the SM465 When filling your 465 with gear oil, we recommend that you select a conventional mineral oil or a para-synthetic in lieu of a full synthetic oil. com">Chevy Manual Transmission Identification. The letter M was used to ID the. - Chevrolet Division, 1979, Norwood Assembly Plant, unit #1 (this would be from a 1979 Camaro). Again on the muncie, and looking at the cover, 3rd/4th gear lever is on the left. One of the best ways to identify a Muncie is the casting numbers on the. Aisin AY6 — 6-speed longitudinal manual made by Aisin. The code on the Muncie should be P9MddA. No other book goes into this much detail on the identification of the Muncie 4-speed, available parts, selection of gear ratios, and the rebuild process. Here are the codes. The standard "base" transmission in a '68-'69 SS-396 was the Muncie 3-speed. Many Muncie 4-speed maincases, extension housings, and sidecovers have a casting date code. 103 CASE 3831704 1963 Three speed (small) front bearing retainer 7/8"countershaft. There were usually two “broadcast code” letters added to the end of the part numbers on the tag. Muncie Transmission Identification. This is a Completely and Freshly Professionally Rebuilt Original 1970 M20, (M-20), Muncie Wide Ratio 4 Speed Transmission, (no aftermarket or imported gears). identify chevrolet gmc manual transmissions. & 55-59 Vette 168 Tooth Chevy Casting #3742257 58-60 Chevy Pass. Muncie ID Tags 1964 M20 3841435 1965 M20 3857577 1965 M20 3857578 Z16 1966 M20 3870357 L-34 L-35 1966 M20 3890534 L-78 1966 M21 3877459 ALL 1966 M22 3879993 L-78. These letters did coincide with the broadcast code letters called out on the build sheet in. RPO codes are typically placed in the glove compartment, which allows you to view the options on your vehicle without ever cracking the hood, or crawling under the car. Muncie M22 — 4-speed longitudinal heavy duty close ratio manual transmission made by GM at their Muncie, Indiana factory Saginaw M26/27 transmission — 3 and 4-speed longitudinal light duty (less than 300 hp) wide ratio manual transmission made by GM at their Saginaw, Michigan factory Muncie M62/M64 — 3-speed longitudinal transmission made by GM. Many Muncie 4-speed maincases, extension housings, and sidecovers have a casting date code. Both single and dual drain plugs were used. Output shafts may be large or small. CHART *MUNCIE Shaft Identification: Muncie 4-speed transmissions can be distinguishedvfthe rom style. Chevy Manual Transmission Identification. There were usually two “broadcast code” letters added to the end of the part numbers on the tag. (455) 81-82 CAMARO/FIREBIRD 9 bolt side cover MUNCIE M-20/M-21 EARLY, G. Muncie Casting Numbers. Many Muncie 4-speed main cases, extension housings, and side covers have a casting date. Muncie 4-speed Transmission (Group 4. I have a Muncie tranny and I'm trying to identify which model it is. All Muncie transmission cases are made of aluminum, and the identifying casting numbers are prominently stamped in the passenger side of the . 1970 Muncie 4 Speed Transmission 3925661 1/28/70 P0A28A Corvette Camaro Chevelle | Tracy Performance Corvette Sales, Parts and Service Empty Home Apparel, Protective Gear and Merchandise Back to Main Menu Apparel, Protective Gear and Merchandise Automotive Accessories and Merchandise Back to Apparel, Protective Gear and Merchandise. The Muncie four-speed was produced in two ratios: the wide ratio (M20) and the close-ratio (M21). 99 Add to Cart 67 Muncie Transmission ID Tag #3870354 Price: $24. All other transmissions were extra-cost options. *MUNCIE Shaft Identification: Muncie 4-speed transmissions can be distinguishedvfrom the style of the transmission arm attachment. Muncie 4-speed Identification To distinguish between Muncie types, if the Muncie was built after 21-Oct-1968, the transmission code contains one of three letters at the end of the build code: A = 2. Not for passenger car as some self proclaimed specialists may think. The transmission codes are found on the Protect-O-Plate and in the following locations: Muncie 3-speed = on the boss above the filler plug Muncie 4-speed = on the right side of the case at the right side of the cover flange. Identifying Chevy Bellhousings. Main Case Numbers Casting Number Year Notes 3831704 1963 7/8-inch cluster, small bearing 3839606 1963 - 1964 7/8-inch cluster 3851325 1964 - 1965 7/8-inch cluster. I'm sorry i'm sure this has been asked before, but i am looking for some verification about this muncie 4 speed i bought for my car. Damien VildMemberfrom Leroy, Ohio. Serial numbers for Muncie 4 speeds always begin with the letter "P". This means the Muncie was assembled December 13, 19 67 for . MUNCIE M-20/M-21 EARLY, G. Pre-1969 Muncies use a stud and nut at the indicated attachment point, while 1969 and later boltPRE 69’ MUNCIE & ALL 69’ & LATER MUNCIEMuncies use a bolt as illustrated on the right. If you see any errors, or would like to add an RPO code, just leave it in the comments and I’ll throw it on. 48:1, 4th direct Note 2: M-20 gear ratio: 1st 2. Reply Save Like 1 - 12 of 12 Posts 6 68Z/28 · #2 · Mar 30, 2007. (451) 7 bolt side cover used from 1963-68 * MUNCIE Shaft Identification The above Muncie 4 speed transmissions. On maincases, the code is usually found on the passenger side of the case below the casting number. The Novak Guide to the GM Muncie SM465 Transmission. Identifying The Muncie Muncie four-speeds were produced in two different ratios: the wide ratio (M20) and the close-ratio (M21). An M-22 "Rock Crusher" is a Muncie four-speed transmission for cars made by General Motors in the 1960s. 54 tranny would live the longest behind a good motor! And next, the common 2. Damien VildMemberfrom Leroy, Ohio. *MUNCIE Shaft Identification: Muncie 4-speed transmissions can be distinguishedvfrom the style of the transmission arm attachment. (The M does not stand for "Muncie. Identify a transmission type correctly before fitting it into your car. The choice of transmission was dictated by the engine size and rear-axle ratio. (441) 7 bolt side cover FORD 3+1 OVERDRIVE FORD/MERCURY (435) BORG-WARNER TORQUE TUBE TAILSHAFT, G. RPO codes are typically placed in the glove compartment, which allows you to view the options on your vehicle without ever cracking the hood, or crawling under the car. Save davewho1 · #15 · Mar 23, 2017 Save 71454Chevelle. Thanks Dan, Shawn for an M21 at 450. Many Muncie 4-speed maincases, extension housings, and sidecovers have a casting date code. MUNCIE TRANS INDENTIFICATION. Before you here are the basics of Muncie M20, M21, and M22 four-speed transmissions. I'm sorry i'm sure this has been asked before, but i am looking for some verification about this muncie 4 speed i bought for my car. 1965 4 Speed Transmission Codes. Manual Transmissions ~ The 1966 Chevelle …. 5 X 11 (inches) Muncie 4-Speed Identification Muncie RPO Codes Main Case Casting Numbers Serial Numbers Main Cases Service Cases and Transmissions. Muncie 4 speed transmissions used both versions, Saginaw 4 speeds used bolt style and T-10 and ST-10 4 speeds use stud style. Muncie RPO Codes 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). Muncie M22 — 4-speed longitudinal heavy duty close ratio manual transmission made by GM at their Muncie, Indiana factory Saginaw M26/27 transmission — 3 and 4-speed longitudinal light duty (less than 300 hp) wide ratio manual transmission made by GM at their Saginaw, Michigan factory Muncie M62/M64 — 3-speed longitudinal transmission made by GM. According to Cangialosi, the date was based on model year, not necessarily the calendar year. Muncie M20, M21, and M22 Four. Muncie 4 speed spline, groove and tooth count characteristics. Well ,a later one might have the A,B or C code stamped after the Muncie serial number 1969 to 1974 Muncies got a ratio designator at the end of the serial number. Input shafts may be fine or coarse spline. (example: P7A14 - Muncie 1967, Jan 14) Muncies assembly codes are model year. The best way to ID the transmission is to count teeth. (The M does not stand for “Muncie. The early production Muncie four-speed case is the small-bore unit and can be identified by the GM casting number 3831704 (see Muncie M20/M21/M22 Main Case. Also, often, that partial VIN will tell you the model of the car by looking at the assembly plant code. Getrag 260 — 5-speed. Many Muncie 4-speed main cases, extension housings, and side covers have a casting date. One of the best ways to identify a Muncie is the casting numbers on the external components of the transmission. An extra heavy duty close-ratio version (M-22) was also offered on many of the big-block high-performance models. Anyone know the model and possibly the gear ratio and what it might fit into? Thank for the help. 99 25 Items Count on Zip Corvette for the best quality Corvette Parts available for your 1963-1967 Corvette. The early production Muncie four-speed case is the small-bore unit and can be identified by the. Gm 4 speed manual transmission identification numbers. 3925661 - main 3978764 - tail Side - 037T Side shift plate - 2 335308 Here is a link to pictures: http://i112. The letter M was used to ID the Muncie plant for the Muncie 3 speed, so P was the next logical letter. Muncie 4 speed transmissions used both versions, Saginaw 4 speeds used bolt style and T-10 and ST-10 4 speeds use stud style. 1969 Z28 Camaro and Other 69 GM Cars Casting Numbers Correct. P0101 would indicate January 1st. 1970-LS5, #28- Fathom Blue,TH400, original motor car. The serial number is a date code the transmission was built for a particular year. Muncie Casting Numbers Front Bearing Retainer 4. The letter O would add confusion since it resembles zero. Guide to Muncie M20, M21, and M22 Four. How to tell difference between M20 and M21. GM Transmission RPO Codes. Several things are needed to identify a Muncie four-speed transmission correctly. 1963-1966 production codes will start with the letter P and have four numbers, for example: P0421. The large-bore Muncie came into production in 1964-’65 and became the standard from then on through the end of production in 1974. The 396 big blocks (from '68-'70) came with either the TH-400 or a Muncie 3 or 4 speed. (2) All 454 Chevelle applications. It was installed in the Camaro, Chevelle, Buick G. P = Muncie 9 = 1969 M= Month of build dd= Date of build A= M20 / B=M21 / C=M22 Those are the primary numbers you need to worry about. Four speeds were available in GTO’s, notably the Muncie M20 wide ratio, M21 close ratio and M22 rock crusher, and automatic fans had either a two-speed Powerglide from 1964 through 1966 or, from 1967 on, the three-speed Turbo-Hydramantic M40 option, which would become known as the “Turbo 400. How to Identify a M22 Rock Crusher. I have some other numbers i will include in the pictures. (451) 7 bolt side cover used from 1963-68 * MUNCIE Shaft Identification The above Muncie 4 speed transmissions can be distinguished. Transmission Identification.   This transmission has the 2:52:1 first gear and 1:1 4th gear. How to Identify a Muncie Four Speed: Build Date Codes …. One of the best ways to identify a Muncie is the casting numbers on the external components of the. 1970- NOM, 496, M21, #48 Forest Green. The 396 big blocks (from '68-'70) came with either the TH-400 or a Muncie 3 or 4 speed. Many Muncie 4-speed maincases, extension housings, and sidecovers have a casting date code. Muncie 4 Speed Transmissions Identifying Muncie 4 Speeds III by Paul Cangialosi The most popular question has to be that everyone thinks they have the famous "rockcrusher" M22 4 speed. RPO codes are typically placed in the glove compartment, which allows you to view the options on your vehicle without ever cracking the hood, or crawling under the car. Some Muncies also carry ratio I. Muncie M21 4 speed! whats it worth?. On maincases, the code is usually found on the passenger side of the case below the casting number. Can anyone tell me where i can find nfo for decoding metal 4 speed tags for muncie m20 21 and 22. 65-66 Muncie Transmission ID Tag#3879987 $24. Found a Muncie M21 4 speed! whats it worth?. According to Drivetrain. Many Muncie 4-speed main cases, extension housings, and side covers have a casting date. The Muncie was used with most performance General Motors engines. The serial number is a date code the transmission was built for a particular year. Several things are needed to identify a Muncie four-speed transmission correctly. I am having a very hard time identifying. Understanding the Muncie Trans Metal Tag. P represents the manufacturing plant, Muncie. Speedometer adapters were used on either sides of the rear section (extension). If you have the incorrect transmission, your. 20),Powerglide Rearend Corvette IRS,3. Lots of people contributed,but credit goes to Chuck Hanson for publishing this all in last months Chevelle World. Month Code Chart January Letter: A May Letter: E September Letter: P. The early production Muncie four-speed case is the small-bore unit and can be identified by the GM casting number 3831704 (see Muncie M20/M21/M22 Main Case Identification chart). 1970 Muncie 4 Speed Transmission 3925661 1/28/70 P0A28A. This is the interpretation of this code: P is for Muncie, 0 is for 1970, B is for February, and 02 is for the second day day, and C is for M22. The Summit Performance 4-Speed shifter (PN SUM-700040) is a bolt-on swap. Air-Gap then take a moment to show off our latest addition to the Nova's drivetrain line-up The 26 spline Muncie 4-Speed. Muncie Casting Numbers. 000) - Casting Numbers (1) All M22 applications except 454 engine. 1963-1966 production codes will start with the letter P and have four numbers, for example: P0421. I am having a very hard time identifying my Muncie transmission-to determine if it is a M20, M21, or M22. The Muncie 4-speeds (M20, M21, and M22) are some of the most popular manual transmissions ever made and continue to be incredibly popular. Transmission Identification Tag · 1963. (example: P8R23 is assembled Oct 23, 1967 for 1968 model year. The best way to ID the transmission is to count teeth. T-10 Four-Speed Type First Gear Second Gear Third Gear Fourth Gear Super T-10 Four-Speed Type First Gear Second Gear Third Gear Fourth Gear Muncie M21/M22 Four-Speed Type First Gear Second Gear Third Gear Fourth Gear Saginaw Three-Speed Type First Gear Second Gear Third Gear Saginaw Four-Speed Type First Gear Second Gear Third Gear Fourth Gear. I am having a very hard time identifying my Muncie transmission-to determine if it is a M20, M21, or M22. The Muncie 4-speed was optional for all 1968–1974 Corvettes. Introducing The Muncie 4 Speed!. Manual Trans Reference GM 3, 4, 5 and 6 speeds V24 How to identify chevrolet gmc manual transmissions Use the following information to compare physical description of your Chevrolet or GMC manual transmission in order to. See our 1969 Z28 Camaro and Other 69 GM Cars Casting Numbers Correct Muncie 4 Speed M20 WIDE RATIO as well as other Complete Muncie Transmission Units parts . Muncie Casting Numbers Front Bearing Retainer 4. 360806 74-79 (2nd Design) 604932 63 and 3SP 207 bearing. (A, B, C,) Last digit of assembly code. Serial numbers from 1963 to 1966 included only the month and day. Casting #3729001 Chevy 168 Tooth Cast Iron Chevy 168 Tooth Casting #3733365 55-57 Chevy Pass. 7 bolt side cover 1970, 454 Chevelle. Muncie 4-speed (2. Home · Diagrams · Muncie Rebuild Numbers. The large-bore Muncie came into production in 1964-’65 and became the standard from then on through the end of production in 1974. Click to expand But I don't know if that's what he was referring to as this is stamped and not cast as he said. Several things are needed to identify a Muncie four-speed transmission correctly. Another way to confirm that the transmission is original to your car is most Muncie four-speed. Trans Code Format: tymdds where: t = transmission type MANUAL AUTOMATIC S = Saginaw 3-speed A = 68/69 L6 Torque-Drive K = McKinnon 3-speed C = Cleveland Powerglide H = 69 Muncie HD 3. Muncie 4-speed Transmission (Group 4. Expect to find various combinations out there because these high-performance four-speed transmissions have been thrashed, trashed, and rebuilt through the decades. Further Muncie identification 3 Muncie 4 speeds were offered. In order to correctly identify a Muncie four-speed transmission, several visual clues are needed, and those cues involve the casting numbers on the case, side cover, and tailshaft. Transmission identification may be determined by finding the transmission application code in the following tables. The above Muncie 4 speed transmissions can be distinguished from the style of the transmission arm attachment. P stands for Muncie Plant. Casting #3764591 60 Vette and Pass. 1969-1973 Typical date code: P9B08C P-muncie 9-1969 B-February 08-Eighth day C-M22 MODEL IDENTIFICATION (1969-1972) A-M20 B-M21 C-M22 Note: not always stamped Originally, identifying the transmissions by external markings was simple. The code on the Muncie should be P9MddA. This is the interpretation of this code: P is for Muncie, 0 is for 1970, B is for February, and 02 is for the second day day, and C is for. I have 40 or 50 of those metal tags from mostly 69 and 1970 and would like to decipher some of them. 4 speed (Iron): Left side of maincase on machined pad below side cover. Of the regular production codes, one particular Muncie 4-speed type appears. Muncie 4 Speed Transmissions">Muncie 4 Speed Transmissions. Well ,a later one might have the A,B or C code stamped after the Muncie serial number 1969 to 1974 Muncies got a ratio designator at the end of the serial number. How to Identify a Muncie Four Speed: Build Date Codes. 356 RETAINER 360806 74-79 (2nd Design) 604932 63 and 3SP 207 bearing 3741458 Cast (3741458) History: 3851326 use 3915020 06-67 3851326 1964-67 3859032 75-79 (1st Design) Sag? 3915020 68-74 Main Case Casting Numbers 4. From what i have looked up i believe its a. 70:1 gear ratios 1967 L-68 Corvette 427/400 HP Drivetrain Assembly Breakdown Block 427/400 HP (2-bolt) #3904351 * Engine Code Suffix JC - 4 speed, L36 engine w/3x2BC JD - Powerglide, L36 engine w/3x2BC JF - 4-speed, L36 engine w/3x2BC w/AIR. B2409: 66-67: TAG - M-22 transmission/differential lubricant (attaches to rear end plug on M22 equipped cars) 7. 4 speed Saginaws no lines= 2. Identifying codes · 1963 -66 codes follow a 5 digit format starting with a P followed by the month and day the transmission was stamped. Feel free to post ads related to Muncie & Borg Warner T10 4 speeds or other GM Manual. It was also possible to get a '68 SS-396 with a 2-speed "PowerGlide" automatic. T-10 Four-Speed Type First Gear Second Gear Third Gear Fourth Gear Super T-10 Four-Speed Type First Gear Second Gear Third Gear Fourth Gear Muncie M21/M22 Four-Speed Type First Gear Second Gear Third Gear Fourth Gear Saginaw Three-Speed Type First Gear Second Gear Third Gear Saginaw Four-Speed Type First Gear Second Gear Third Gear Fourth Gear. Muncie 3 speed transmissions. Partial VIN stamping from Flint. These letters did coincide with the broadcast code letters called out. 1970 Muncie 4 Speed Transmission 3925661 1/28/70 P0A28A Corvette Camaro Chevelle | Tracy Performance Corvette Sales, Parts and Service Empty Home Apparel, Protective Gear and Merchandise Back to Main Menu Apparel, Protective Gear and Merchandise Automotive Accessories and Merchandise Back to Apparel, Protective Gear and Merchandise. 65-66 Muncie Transmission ID Tag#3879987 $24. Muncie 4 Speed Transmissions Identifying Muncie 4 Speeds III by Paul Cangialosi The most popular question has to be that everyone thinks they have the famous "rockcrusher" M22 4 speed. 1969 to 1974 Munciesgot a ratio An example would be P4D23B. In order to correctly identify a Muncie four-speed transmission, several visual clues are needed, and those cues involve the casting numbers on the case, side cover, and tailshaft. Muncie 4-Speed The regular productions codes identify an M-20, M-21, and M-22. 3919384 - M20 with production V8s (meaning the base small block and a Saginaw) 3919390 - M20 with RPO L30 - L73 (327 275/250 engines with a Muncie) (L78 added on 2/15/67) 3915079 - M20 with L78 3915085 - M21 with L78 3925626 - M22 with L78 Might note there's nothing listed for the L79 so that could be applicable with this particular tag. 1st/2nd gear lever is on the right. Transmission Identification. The regular productions codes identify an M-20, M-21, and M-22.