2017 Explorer PIU Transmission not going into gear (intermittent issue)

[RAP66]

My 2017 Explorer PIU just started having a transmission problem. It has 63k on the odo. The transmission not going into gear?? It's intermittent. When I put it in reverse, I dont get the "R" indicator and the gear does not "grab" its as if it's in neutral. If I give it some gas sometimes it will slam into gear and the check engine light will go on along with a fuel economy pop-up warning, which does go away after next start. I have not tried pulling a code yet. I get similar actions when going into drive with the same behaviors.

I checked the fluid, looks ok but could probably use a change

Once it's in gear the car drives normally.

Has anyone experienced this?? If so how was it fixed?

 

[Fix4Dirt]

sounds like slow to build line pressure, could be a leak. on a 5r55e id look for the separator pin alignment, but not sure on these newer ZF (?) transmissions

 

[Road1]

Do the other gears work as they should?

If you have trouble, the solenoid pack may be the problem, specifically Solenoid B sticking. Try new fluid, and when you drain it, check for debris (and try a magnet to see if you get steel bits).