91 D50 4x4 auto. What trans is it?

[pcweber]

I have the 4 speed auto with O/D selector button in the end of the shifter. What trans is this? Is it common with other Mopar, Mitsu, or maybe Jeep models?

[pcweber]

Part of the driver for my question is I want to change trans fluid and wonder what type fluid I need to get?

[pennyman1]

dextron III for either model aisin or a500 - the aisin has a cleanable screen as a filter in the pan.