Pushbutton trans parts interchangability?

Thanx for the info guys. I also have access to a 904 from a 65 Valiant. Not a pushbutton I know, but maybe better going that route with the pump and filter difference that kickdown mentioned.

The stock rear in my Dart munched the carrier spider gears. I knew there was an issue, it had been noisy. Just went bang at an intersection. So I swapped in a spare rear that I had already located. I turned out of my driveway and down my street and all seemed fine untill it shifted to 2nd and made crunch and munch noises and engine stalled. Knew it was the trans. Hit neutral and got on the brakes. Started engine again and punched 1st gear button and it drove seemingly normal till I got to driveway to turn around. It went into neutral and reverse and back into 1st as I turned around. As soon as I hit 2nd gear button it did exact same thing again. Aparrantly when the rear broke it must have locked up long enough to damage the trans also.