Ok, What have I done now... (904 problem?)

Mopar to ya said
In the 90's you used to change Caravan trannys every 60K.

The 90's 3-spd FWD tranny was also called Torqueflite, and essentially the same inside as the 904/727 except for a lockup torque converter and FWD changes (output shaft folded back thru gearset and differential added). I rebuilt the one in my 96 Voyager (413). The same tranny was used in Neons and earlier K-cars (404). Since almost identical inside, I don't know why ATF+4 wouldn't be the best fluid to also use in a 904/727. I use it.

The minivan trannys that failed regularly were the early 4-spd electronic 604 models, used in V-6 minivans. They are quite different inside, with no bands, which was a very clever design for the time. There were several upgrades made that greatly improved them from the late 80's models (can get upgrade kit). But the main reason they failed is attributed to shops putting Dexron III in since cheaper, and because some Chrysler manager decided to put a note in the owner's manual saying "Dexron III can be used when ATF is not available". Dexron made the lockup torque converter shudder and wear the clutches. High friction fluid is good, and fast hard shifts are good. If the public knew that, transmissions would be designed to shift firmly and last much longer. Since most car computers now control the throttle, the latest engine controllers manage shifts better in the latest cars.