Just wanted to verify a couple things for ya, Stick. The 604 was not in production till '89. You diffenatly want to use ATF+3(7176) Do not use ATF+4 in any minivan with a 604, BEFORE 2000! Use it it any other Mopar you can find. Don't matter if its a Ram 2500 or a New Yorker, any year, just no minivan. Also its semi-synthitic, so thats awesome cooling and stuff. The mini van has a special Torque Converter Clutch(TCC) strategy. Its made to slip, so the ATF+3 is modified for this. Also, no matter how bad a 604 is damaged, there is never a problem with the valve body, other than separater plate #33. And...Half the time when a Mopar is in "limp mode", its fixed with electronics. Not rebuild. Espesially after '96. Well, other than hard parts failure because the 3.8L puts out too much power for this well designed 3.0L transmission. (no more lip seals and no more too thin reaction plate)
Not ranken on ya Stick
, just letting you know sup. As these vehicles pay my mortgage, visa bills, etc etc...
Stay cool