I have a muncie 4 speed trans. coded as
p7c20 = muncie,1967,march,20th ??? right ??

also has
7G119402 would this I.d
. the car it was in ????
and what m code it is -20,21,22 ???

thanks!

Will

I have a muncie 4 speed trans. coded as
p7c20 = muncie,1967,march,20th ??? right ??

I think that's correct

also has
7G119402 would this I.d
. the car it was in ????
and what m code it is -20,21,22 ???


That is the partial VIN of the vehicle that the tranny came out of. It's a '67 model, but I don't know what plant "G" designates. I'm sure someone here will, though.

You should be able to tell what the transmission is by the number of groves on the input shaft, if it is original to the transmission.
Two groves = M20
One grove = M21
No groves = M22

...muncie 4 speed trans. coded as
p7c20 = muncie,1967,march,20th ???

also has
7G119402 would this I.d
. the car it was in ????

and what m code it is -20,21,22 ???

thanks!

Will

Correct - It is a Muncie "P"(=Passenger) 4-speed assembled on March 20th, 1967.

It came from a 1967 Chevelle, with VIN ending in #119402, assembled at the Framingham, Maryland plant. The other GM 'A' and 'A' Special bodies manufactured there for BOP cars (442, GTO & ect...) would have other VIN series, such as 300,000/500,000.

Most likely a M20 or M21. No record of M22 being installed in any 67's except Corvette. Look for a drain-plug, M22's had drains and usually a "P" was stamped on it. Most Muncies, other than M22, didn't have factory drilled drains until late 69/early70.
You will have to remove to check for Input shaft rings if original or OEM shaft is present. Or, even easier, just manually rotate the engine (mark damper or flywheel), with trans in 1st and count the number of times to rotate the driveshaft one (1) time - 2.52 engine rotations = M20 / 2.2 engine rotations = M21.

Hope this helps;
John

thanks!

I'll check the rotation tonight.

hope i'm not completely lost but I'm pretty sure those tranies were built in framingham MAss.

hope i'm not completely lost but I'm pretty sure those tranies were built in framingham MAss.

I have no idea where you are... :D
And Framingham, Ma is a nice enough town... :thumbsup:

But, all "Muncie" transmissions, and even a few "Saginaw's", I've ever worked on came from Muncie, Indiana.

The Chevelle it was originally installed in was built in Framingham, Massachusetts; tranny came from Muncie, Indiana. :thumbsup:

Doh :clonk:
Doh :clonk:
Doh :clonk:

:D I had traded e-mails with a friend in Elton, MARYLAND while I was typing today... :clonk:

Gotta watch that more carefully - "JohnZ" is right (of course) the final assembly plant for the Chevelle it came in is indeed in Massachusetts.
Don't know why I didn't catch that the second time...
I just 'smote' my keyboard mightily for letting me make that mistake... we'll try not to let it happen again soon... :waving:

John M

sorry about that, I meant to clearify that the chevelles were biult in Framingham MA. A quant little vacation destination in the historic Metro West district of MA.

I remember when we closed the Framingham plant, which had provided an outstanding livelihood for 5,000 people for over 40 years ; we planned to modernize it for a new product and add a new paint shop, but the town council said they didn't want it expanded, and wouldn't issue the permit. So we put the new product elsewhere, closed the plant and 5,000 people lost their jobs. :clonk: