Umm, this is what he posted:
no it doesn't shift in to 4th gear
read the first few posts and you'll understand.
Under what condition does it happen? I've had my tranny downshift to third and stay there at about 65 MPH, because I was on a hill behind a slow guy. Speed up, slow down, speed up, etc. and I kept downshifting to third to do it, so my tranny locked me out from 4th gear.