Ok, I have the same problem. I thought it was the tcase motor, but I got it to wok in nuetral. Mine is a 97 eddie sohc 4.0. I don't know much about these explorers cause this is my first. I've had mine 7 mos now. I tested my tcase motor by unbolting it from the tcase and hot wiring it to the battery. It ran fine so that told me right away it wasn't the motor. So then I Left it unbolted from the tcase and plugged it back into the wiring harness. I went through the ranges with the switch on the dash and it wouldn't work. My neighbor told me to try shifting it in and out with it in nuetral. It shift into 4low and back to 4h but when I go to auto nothing happens. So, why doesn't it shift on the fly. Oh and it is deffinatly in 4h cause when I had the motor off, the selector on the tcase was on 4h. So I'm stuck now too. I refused to beleive it was the tcase up until now. It sounds like it might be in that clutch set up in the tcase. Something is'nt letting it shift out of 4h. Could it posibly be in the sensor that tells it when I lost grip and engages the front wheels?