what is the best overdrive transmission for a Duster

RustyRatRod said
The A833 OD is not a 3 speed. I don't know why people insist on calling it that. Anything with the A833 designation is a 4 speed transmission. The 833 OD just happens to have 4th as an OD.

The best one for you car is relatively rare. It is the 1976 only transmission, which had a cast iron case. Find one of those, if you can.

To get an A500 or A518 in your car, you will have to do some major work to the floor and to the torsion bar cross member and the transmission cross member. If you want to stay automatic, the GM 200R4 is probably the best.

no one calls manual trans with over drive as 4 or 5 speed . Ford famous trans is called a 4 speed with over drive . Aka 5 positions but they don’t call it a 5 speed . Nor does the shifter 1,2,3,4 ,od . A833 was a real 4 speed but once they changed it is called a 3 speed with over drive. Brewers trans even corrected me on it in email when I asked for a 833 4 speed with over drive by mistake .