My OEM coolant was the green 3 year, unless you have a 00 or newer than I believe factory fill is the orange 5 year. I converted my 98 to orange 5 year after flushing the system 3 times with distilled water (including draining the block).
As for the transmission fluid, most guys seem to be using ATF+4 (which is a mopar approved alternative). You can also use a synthetic gear oil 75w-85, but make CERTAIN that it is GL-4. GL-5 will cause damage to the softer metal components. The atf will be a bit nicer to shift when cold, but the gear oil will hold up a bit better under tracking condition.
And the rear differential uses 75 W/140 (MS-8985) and A container of Mopar Gear Additive (friction modifier) should also be added after a lubricant change.
