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Old 05-14-2020, 05:59 PM
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Default 1969 Muncie Transmission Stamps

Hi Guys, looking for a little information on 1969 Muncie transmission stamps. Iím in the market for an Original 1969 Muncie M22. Itís for a driver quality 1969 Camaro. Iím not concerned about month date codes. I would like at least a real 1969 M22 of quality for my car. So my question is this. Was it typical at times for 1969 Chevrolet MuncieĎs to not have an A,B or C stamp to designate an m20 m21 or m22? Iíve looked at several used ones available for sale. Some have the A B or C stamps, others donít. The ones Iíve looked into were not over the counter replacements. They all have had Camaro Chevelle etc Vin number stamps and Build date stamps. Just missing the single letter transmission stamp. Any clarification would be helpful. Thanks Rob
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Old 05-14-2020, 06:48 PM
roadster roadster is offline
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Default 69 muncie

A is M20 , B is M21 , C is M22 .
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Old 05-14-2020, 07:10 PM
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Originally Posted by roadster View Post
A is M20 , B is M21 , C is M22 .
I guess I should clarify, is it common for an Original to Not have the A B or C designation ? But just have the Vin number and plant/ build date? Thanks
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Old 05-14-2020, 07:20 PM
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Earlier 69 did not have ABC stamps came later in the model year. I think it started sometime around June
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Old 05-14-2020, 07:56 PM
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Earlier 69 did not have ABC stamps came later in the model year. I think it started sometime around June
That is what the seller of an M22 with a 1969 Camaro Vin told me. I wasnít sure if it was factual or not. Seller claims itís an original M22 gear set inside. Not having the ďCĒ stamp on the case I wasnít sure what to believe. Thanks Rob
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Old 05-14-2020, 08:07 PM
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I could not find a stamp of my trans but here is the pop and it does not have the C and it is the original M22. The cars is a June built car
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Old 05-14-2020, 08:13 PM
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Will the seller open the side case so you can inspect the gears inside? If you know what to look for (gear tooth angle), you can verify it yourself.
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Old 05-14-2020, 08:56 PM
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Originally Posted by ssl78 View Post
I could not find a stamp of my trans but here is the pop and it does not have the C and it is the original M22. The cars is a June built car
Thank You for the extra effort !!!!!
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Old 05-14-2020, 08:57 PM
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Will the seller open the side case so you can inspect the gears inside? If you know what to look for (gear tooth angle), you can verify it yourself.
good idea. I'm going to ask for some close up shots of the gear set. Thanks, ROB
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Old 05-14-2020, 09:02 PM
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https://www.ebay.com/itm/Rebuilt-Ori...53.m1438.l2649

This is the Muncie I was considering. Thoughts on it anyone?
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