Transmission Identification Help

Dan, I don't think that info is correct

The 1966 factory parts catalog (final edition) is the source of my info.

The Trans you are thinking of, for use with the adapter was a 727, not a 904.

Yes. And the transmission in this discussion (2538 331) is in fact a 727.

That spacer/adapter ring will not work with a 904

This thread doesn't involve a 904 (and I can't think of a reason why the spacer/adaptor wouldn't work to put a '68-up 904LA behind a slant-6, can you?)

The pilot on the 727 converter is the same size as the late (68 up) 904.

Oh yeah, I always forget that detail -- you're right, it was only the pre-'68 904 that had the 1.55" torque converter pilot diameter; all the 727s and the '68-up 904 have 1.8" pilot diameter.

A 727RG trans will not fit a 67 older slant six

Right, but nobody's talking about trying.

Edit: It was the original poster that mentioned the 904. This trans must be a 727LA.

Yes, as I was saying…!

This trans will work behind the 74 small block without the annular crank bushing.

Yep -- now we're all on the same page.