4 spd gurus

Can you identify this 4 spd for me ,still in car , I'm told it has 18 splines.. all the numbers I can find are 640, below that C99539 or C99599 then there is a 33 3..And where can I get a new shifter mechanism for it ....Thanks

Is there a raised pad on the passenger side? Those are the stamped numbers that we need.

Thanks ,, I'll get under there. tomorrow and try to see numbers on the rt side

You can't always trust the numbers on the pad because I have built a bunch of 18 spline transmissions out of big bearing 23 spline cases. I have also put 23 spline gears into an original small bearing 67 HEMI box. Sometimes you build whatever you have on the shelf.
Gus

Got the numbers on the r/t side tab..C99129H..

Brewer Performance has a break down of transmission # but as fourgearsavoy said it is only a good number if nobody screwed with it.

You're posting the raised casting numbers which can't always be used to ID the origins of the trans. Stamped numbers on a raised pad on the right side have the build data.

If no raised pad it's pre-'68.