my newest vehicle is my 99 caravan ["the bus"], and although it's 604 transmission/transaxle calls for something else, [a mopar fluid/atf - +3 maybe ?] i have been using cheap, multipurpose dexron atf in it for years and many miles, with no problems whatsoever.
for what it's worth, it also has a Trans-Go shift kit in it. of course i don't drive this thing like i stole it, but at times, it does see truck duty by hauling engines and transmissions.
i just don't know any more. some say +4 is the way to go, i have used other stuff without problems.
i guess i'm just old and confused..............