Please help!

Hello dear community. Before, of course, I have read almost everything there is to find in this regard. Nevertheless, in the end not the right one was there. So I try my luck now. Currently the problem with my Chrysler Voyager, in the morning when it is cold, the transmission does not take in any gear. The transmission came in before about 30tkm overtaken, the oil has the right filling/quantity, it does not burn and the fiber is also quite reddish. Motor is started , no matter if R or D doesn’t work… He just rolls as if he was in N… Give the “gas” nothing happens… Then suddenly when a gang goes in “slips” then he drives a few meters.. Then the same thing again.. And that goes on for the first km. After that everything is okay, 1A. No jerking. Nothing. Of course, the car was or is in the workshop. Read out something like “oil pump” bla… In any case, according to the factorystat, the error has to be found first. But in other words… It’s going to be expensive… I’ve got two kids, I’m dependent on the car! My hope, who knows, is who has THE TIP… BEST DANK IN PREVIOUS!