M-21 Identification Tag - Team Camaro Tech
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post #1 of 7 (permalink) Old Dec 20th, 00, 08:33 AM Thread Starter
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Steve
 
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I finally completed the re-build of the M-21 transmission in my '68 Z. I noted a small thin metal ID tag held on by one of the inspection plate bolts, the number is 3915085. Is this a GM part number? Muncie ID number? The original stamped VIN number matches and so does the Muncie date code data for the car's 03A build date.
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post #2 of 7 (permalink) Old Dec 20th, 00, 08:52 AM
 
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I wish I knew. I have a couple of these tags but have never heard anyone explain why they are there and what they mean. They are about a half inch by one inch
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post #3 of 7 (permalink) Old Dec 20th, 00, 03:12 PM
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its the GM part number
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post #4 of 7 (permalink) Old Dec 21st, 00, 02:25 AM Thread Starter
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69-ZMAN, Thanks for the information, I kinda thought that might be the case due to the number of digits.
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post #5 of 7 (permalink) Old Dec 21st, 00, 03:17 AM
 
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Good info. Do you know of a listing anywhere that says what numbers mean what trans?
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post #6 of 7 (permalink) Old Dec 21st, 00, 03:20 AM Thread Starter
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Not me, how about it 69-ZMAN?
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post #7 of 7 (permalink) Old Dec 21st, 00, 01:21 PM
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here you go, this is out of a factory assembly book
3946797 = M20 / Z28 & L78
3946798 = M21 / Z28 & l78
3950318 = M22 / Z28 & L78
there are a bunch of others look at page M20 A1 of the factroy assembly for all the Muncie codes
THAT NUMBER 3915085 DOESNT COMPUTE TALKED TO A FRIEND AT THE LACAL DEALER AND THEY CANT PLACE IT T EITHER
[This message has been edited by 69-ZMAN (edited 12-21-2000).]

[This message has been edited by 69-ZMAN (edited 12-21-2000).]
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