4eat / awd with problems ?

Hi, I am new to the board but thought I would try and ask for some help to diagnose this trans problem. I have changed the fluid and screen , and tested all the sols and sensors inside and they seem to have the proper ohms. Here are the symptoms:
Put it in D, starts off in 2nd gear will shift to 3rd but not 4th.
Put it in 3, starts off in 2nd gear will shift to 3rd .
Put it in 2, it Locks up and will move forward slightly with heavy throttle.
It goes in reverse fine.
Basicly no 1st gear and no 4th gear, and that weird lock in shifter position 2 .
This is in an xt6 with eat4/awd but like the svx trans I think.
The inhibitor switch hasn't been checked out could it cause such symptoms ? Thanks to All