94 Grand Tranny problem

I have a 94 3.8l grand caravan with 200k km that has developed a strange shifting problem. The van started by intermitently taking a long time to shift into drive & sometimes would not up or downshift properly reverse worked fine. This started to get worse so i checked the codes (none) and changed the filter & trans fluid (mopar atf3+)& reset the computer, the problem seemed to clear up a bit, but it would still not shift correcly some times, I changed the speed sensors & tps sensor, with no real change.
I changed the solinoid pack and the problem seemed to be fixed, until the van sat over night then it would not shift into drive again. Once warmed up ie. 5 or 10 minutes of driving it shifts good, allow it to cool off overnight & it won't shift again.
I then tried adding some tranny fix stuff for a few miles (40 or so) then a complete fluid change. I hooked a clear hose to the tranny return line & added new mopar atf3+ as the old stuff pumped out I put 9 liters through then put the return line back on & topped up the fluid to the correct levels. Again when warm it shifts fine, when cold it won't shift into drive.
what to do next ?????? :banghead:

go back to the dealer and have your TCM (transmission control module) flash programmed. It's very possible that your module has lost part of it's operating parameters and needs to be updated. That should help clear things up. Just a heads up, NEVER put any additives inside of these transmissions, you're only asking for heartache and trouble if you do, use only Mopar ATF +3, nothing more, nothing less.