#326, "RE: ATF+3 is going away for good! (Just some info for you guys.)" In response to In response to 3
From what I've heard, you shouldn't mix any of them together. You can use ATF+4 in trannys that were meant for ATF, ATF+2, ATF+3, etc., but I wouldn't mix them.
I would do the ATF+4 but since I was told you shouldn't mix them, that means you would have to flush your tranny before making the switch. I believe this is one of the reasons the tranny in my truck messed up. One thing is for sure, Chrysler trannys are really picky!