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Old 11-26-2021, 12:07 PM
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Default Muncie Transmission Tag Identification

Trying to confirm the transmission tag on a 1969 Camaro SS350
M20 4spd. I've seen the numbers 3946797 for RPO M20. Could
anyone confirm that this is correct? Thanks in advance.

Sal
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I currently own a 1969 Camaro SS350. Although the original drivetrain is long gone, this 4/speed car has a March '69 HC coded block with #041 heads. The transmission is an M20 Muncie #660 case and the rearend is a BS coded 12 bolt posi. Built in Van Nuys.
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Old 11-26-2021, 12:46 PM
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Here's a thread I found on CRG. There might be an updated list...Joe

http://www.camaros.org/forum/index.p...6976#msg146976
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Old 11-26-2021, 02:09 PM
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So the list in that post is from the AIM of course, so you have to assume the part numbers were based on the "standard" rear gear ratio (as well as the actual trans model).

I think the "standard" rear gear for a manual SS/LM1 Camaro (3950356 - L48, L34, L35 & LM1 (assume Muncie M-20) was BS 3:31. Which explains the grouped engines with one trans number.

Of course if you ordered a non-standard rear gear, the trans model may change

Sal, with your SS350 BS 3.31 gear I think you need the 3950356 tag. I have an SS 350 with BS as well and need the same tag
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Old 11-26-2021, 05:59 PM
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From the 1969 power train chart:

LM1 std axle w/4-speed was 3.31. 3.07, 3.55 and 3.73 optional.

L48 std axle w/4-speed was 3.31. 3.07, 3.55, 3.73 and 4.10 [exc. ac] optional.

L35 std axle w/4-speed was 3.07. 2.73 and 3.31 optional.

L34 std axle w/M20 4-speed w/o ac was 3.31. 3.07, 3.55, 3.73 optional.

L34 std axle w/M20 4-speed w/ac was 3.07. 2.73, 3.31, 3.73 optional.

L34 std axle w/M21 4-speed was 3.31. 3.55, 3.73 and 4.10 [ex.ac] optional.
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Old 11-27-2021, 11:08 AM
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Hi guys thanks again for all the info. I saw that reproduction tags were available
on ebay thru The Parts Place. Unfortunately #3950356 was NOT available on their
ebay page. Yes ebay does have original tags but I prefer a clean new one. I sent
the parts place an email to see if their vendor can provide one. The embossed font
numbers on the originals appear to be more bold than the reproduction tags, but the
conditions of them aren't great.

Sal
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I currently own a 1969 Camaro SS350. Although the original drivetrain is long gone, this 4/speed car has a March '69 HC coded block with #041 heads. The transmission is an M20 Muncie #660 case and the rearend is a BS coded 12 bolt posi. Built in Van Nuys.
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Old 11-27-2021, 08:27 PM
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I have 2 but one but the best one has some pitting and the other one is rusted thru.
Good luck with the search.
Martin
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Old 11-28-2021, 01:36 AM
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E-mail me if you are still looking for a 3950356 tag, I only have original.

I also have 3946797,798 and a bunch of others.

Thanks... Crash [email protected]
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