Car doesn’t move until high RPMS.

I had the same problem recently after refilling the transmission after having it rebuilt. The dipstick showed "overfilled" but the vehicle didn't move (and I had poured one quart of ATF directly into the torque convertor before sliding it on). Finally, after moving the gear shift all around through Park, R, N, etc. it reacted and now the dip stick shows more than a pint low. Must have been the torque convertor taking awhile to re-fill on its own (in my case). Can't say if you have a similar quirk or not.