Detroit Gear Trans Fluid

[Commander51]

Shop manual recommends 10 weight motor oil for DG-200 transmissions. What fluid do you run in your tranny--stick with the original, or 'upgrade' to modern fluid--if so, which type[?]

[Roscomacaw]

Use Dexron-Mercon III Just be sure you drain the torque convertor when you drain the pan, so as to get ALL the old oil out.;)

Miscreant at large.