my transmission has a heart stamped into the top of it. does anyone else have this? plus the seria number is stamped into it twice date code is p9p18 and it has a tag with 9798974 on it and maybe a casting number of 3925660....does this sound right for a 350 4speed 1969 firebird 2bbl?

Ruff,

Very interesting indeed. My 68 muncie 4-speed has a clear stamped DIAMOND at top dead center.



You think the factory folks were playing alot of poker on the job?

wierd mines the same but it has a heart.. maybe workers were bored?

I'm going home to check my hand, perhaps we can go for a staight playing Muncie's wild! :rolleyes:

I meant "straight"

Dave,

If you have a Club or a Spade, you're "in".

Mine just has a "+" in a box, either that's the joker or it means I win the pot.

my uncle said its is a "qa" mark quality assurence so that if it blew p they would know which tech made it. supposeably each guy had his own mark

Makes sense. In aviation, we tech inspectors each used a unique stamp to indicate who had done the inspection on a part or maintenance job. Still would love to find the Spade and the Club just for fun.

I'll bet Banshee has seen quite a few unique markings on these transmissions, he has done alot of work on them over the years.

Dave, was yours off an original 68 muncie?

Yup, this is the original to the best of my knowledge. I have not had time to check the numbers, but they are on top near the + stamp "7U143908", on the shifter side "GM 3884685" and on the other side by the US PATENT PENDING etc "3885010"

Any one know where to check......(don't know if I want o find out.....

Casting: 3885010 Years: 1965 - 1967 Ratios: M20 2.52 1st , M21 2.20 1st, M22 2.20 1st

Just found the above on a web site, so I do know the car was shipped Sept 25, 67 according to the PHS docs, so the 67 build date makes sense.