The Supercar Registry - M20 Muncie ?

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- - M20 Muncie ? (https://www.yenko.net/forum/showthread.php?t=184195)

69camaro76b

12-19-2025 01:50 AM

M20 Muncie ?

2 Attachment(s)

Found these stamps on my 69 M-20 transmission. Just curious what they might mean, if anything?? Thxs

SS69chevelle

12-19-2025 02:14 AM

XG is the code for a M20 trans, no idea what the heart is and have seen it on several cases. Might be a QC mark? If that is XC it indicates an M20 as well but it looks like XG to me.

Kurt S

12-19-2025 02:59 AM

The heart is an inspection mark - I've see others used too.
XC and XG are both M20 codes - what engine?

69camaro76b

12-19-2025 03:08 AM

I bought the trans by itself, don't know what engine. ID tag shows 3946797

Kurt S

12-19-2025 05:06 AM

That is XG then. From a Z28 or L78.

Can you post a picture of the date and VIN stampings?

Thanks!

69camaro76b

12-19-2025 09:01 PM

3 Attachment(s)

The transmission is NOS and never been in a car, so there is no VIN. The assembly date is P9M14. Does the blue paint next to the heart stamp mean anything?

SS69chevelle

12-20-2025 01:44 AM

Quote:

Originally Posted by 69camaro76b (Post 1685309)

I bought the trans by itself, don't know what engine. ID tag shows 3946797

info i have found in my 69 chevelle research for that number:

m20-tag 3946797- w/3.55, 3.73, 4.10 axle, 350/396 engines muncie

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