Which transmission?

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shadango

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An 81 Diplomat with the slant 6 --- it should have a A904 tranny, right?

All the applications charts like Rockauto and Autozone are showing a 727???

What am I missing?
 
What does your transmission pan look like?

E8457DE6-1A9C-4EBF-B285-3FECDB2EEE7F.jpeg
 
/6 has a bell housing that is unique. No 727 was ever made with that bell housing pattern. You could find 727s in trucks behind /6 motors, but they used a cast iron adapter.
 
I would agree the /6 bell housing is unique – but they did install A727’s in police and taxi F and M-bodies. It could even be special ordered for FMJ’s. The first gear ratio on A999’s would make the /6 A999 much more desirable than an A727 – but that’s not the point here.

I have worked on and overhauled quite a few /6 A727’s for cars and trucks – all with 1-piece aluminum cases. That said, the car /6 A727’s were all in police or taxi’s (for some reason, the police are hard on their equipment, taxi’s, not so much).

The A904 (A998/A999/A500, etc.) pan gaskets are almost the same as the A727 pan gaskets are – all except for one corner – the Right Front corner.
This is to help elaborate on @Camtron post a tad.
PG 727.jpg

A727
PG 904.jpg

A904 (or variations).
Both pictures are looking from underneath the transmission and the bottom edge of both pictures facing forward.
Bud

Edit: I did a Google search for a /6 727 and couldn't find one - but I know for certain they exist. The pickup/van version is a whole lot more popular than the car version is, though.
 
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