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#1
10-24-2002, 01:48 PM
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I came accross a transmission for sale. The guy says it came out of a 1969 RAIV GTO. How do identify this transmission?
There are two sets of numbers stamp into the case. One number appears to be a VIN number. How do I decode these numbers? If I recall, the RAIV only came with the M21. What is the difference between the M20, M21 and M22? Thanks |
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#2
10-24-2002, 01:48 PM
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I came accross a transmission for sale. The guy says it came out of a 1969 RAIV GTO. How do identify this transmission?
There are two sets of numbers stamp into the case. One number appears to be a VIN number. How do I decode these numbers? If I recall, the RAIV only came with the M21. What is the difference between the M20, M21 and M22? Thanks |
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#3
10-24-2002, 06:59 PM
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A close ratio Muncie used in '69 GTO will have a "660" case & will have a date code which starts with a P, next number will be model year 9, next will be a letter for the month
A=Jan B=Feb C=March D=April E=May H=June K=July M=Aug P=Sept R=Oct S=Nov T=Dec Next, there will be two numbers, the day of the month asm Lastly, there will be a letter A=M20 B=M21 (close ratio) C=M22 (hd close ratio, not used in '69 Pontiac application) An example would be: PB22 B Muncie '69 Feb 22 M21 A VIN will often be stamped in the case, location varies, often on the top mid plate. The Turbo 400 two letter id tag code would be PQ for a '69 Ram Air equipped vehicle. This code of T400 could be from either RAIII or RA4 in '69. There will be a partial VIN # stamped in the drivers side pan rail edge. Sometimes this VIN will be legible & due to it having the plant code before the last 6 digits of the VIN, one can decipher if out of A-body or F-body. [This message was edited by ol' Pinion head on October 24, 2002 at 10:16 PM.]
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Buzzards gotta eat... same as worms. |
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#4
10-25-2002, 05:45 PM
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To answer part of your question you asked about the M20,21,22. If my memory is correct the M-20 will have a 2.52 1st gear, M-21 has a 2.20 1st gear. I do not remember the M22.
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#5
10-25-2002, 07:20 PM
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NEP, If I remember correctly the 20 is a wide ratio, the 21 and 22 are the same close ratio. The 22 has straight cut gears the 21 has heilical (sp?) cut gears.
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A Government big enough to give you everything you want is strong enough to take everything you have. - Jefferson  "If ever a time should come, when vain and aspiring men shall possess the highest seats in Government, our country will stand in need of its experienced patriots to prevent its ruin." - Samuel Adams Right and wrong doesn't need facts all the time. -Lighthouseman ("lawyer") Starnes Performance Automatics www.Starnesperformance.com |
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#6
10-26-2002, 05:45 AM
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The RAIV's only came with the close ratio tranny , because you could only get them with 3.90 or 4.33 rear gears.
So the tranny should be a M21. http://www.kingofgtos.com/index.htm
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http://www.stockappearingdrags.com http://www.stockappearingdrags.com Come on get off that lawn chair and drive that car like it was meant to be driven. 69' 400 RAIV Judge Conv... 12.86@107 Factory Stock 69' 400 RAIV Trans AM .....12.48@110 Factory Stock 69' 400 RAIV Judge HT..... 13.07@104 Factory Stock 73' 455 SD Trans AM........13's?? not run yet 66' 455 GTO Convert.........12.20@112 non original 63' 421 SD Catalina...........restored fast as h*ll |
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#7
10-26-2002, 08:59 AM
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OPH, Is there a way to decode TH400's? I am intrested in finding the year For example: I have 1 TH400 That I took out of a 455/TH400 '76 GrandPrix, its "code" is: 79 OD. I thought the 1st numbers were the year?? Is this right? I also have what I thought was a older TH400 and its coded: 76 AC
thanks in advance, Guy "The mind is a precious thing to taste" Brad Nowell |
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#8
10-26-2002, 11:25 AM
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I'm not OPH, but from what I understand,the last 2 digits of the year then the code for the tranny.
So the 1st would be a 79 tranny for a Olds,looks like 403 in an 88. The last would be a 1976 but I don't show an 'A'. Could it be CA? B's for Buick C's for Chevy P's for Pontiac O's for Olds johnta1 Pontiac Power RULES !!! www.wallaceracing.com 
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#9
10-26-2002, 12:41 PM
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Thanks much John! That last code is def AC. Could that be Cadillac??
"The mind is a precious thing to taste" Brad Nowell |
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#10
10-26-2002, 01:04 PM
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76 AC = 1976 Seville
79 OD = 1979 Olds 98 403 (2.41 & 2.56 axle) Let's go racing! www.outlawpontiacs.com/members/B-Man2.php www.outlawpontiacs.com/members/B-Man.php
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/2.56 2002 WS6 Convertible LS1/4L60E/3.23 |
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#11
10-26-2002, 01:07 PM
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Gracias B-Man!!! Do ya think Dave T**ie pulled the old "switcheroo"?? The trans that decodes as 79 403 Olds is the one that I pulled out of that G.P. (The Loaner) Hmmmmmm
"The mind is a precious thing to taste" Brad Nowell |
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#12
10-26-2002, 01:13 PM
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Was trying to get an "early" core for my race trans build-up. I guess I will check the one that is in the car now, gotta be earlier than 76/79.... [img]/infopop/emoticons/icon_confused.gif[/img]
"The mind is a precious thing to taste" Brad Nowell |
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#13
10-26-2002, 05:41 PM
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TTS, I went through my Chilton And Motor Books on info for Muncie, Could not find what I info. wanted, Went to my catalogs and in Classic Industries it shows M-20 As 2.52 and the M-21 as 2.20...it covers 67'-74' F/B on PG 377 of 2000 catalog [img]/infopop/emoticons/icon_confused.gif[/img]. Guess book could be wrong or F/B and GTO were Different? As I said I went off memory, I have owned Birds not GTO's.....
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