My son is off to school and called to say that our 97 Explorer Limited was acting up (occassionally made a ratcheting sound and occassionally would not go into reverse). I went and got the Explorer and driving home I heard the ratcheting sound (sounded like it came from the transmission--lasted for about 15 seconds and I only heard it one time) and after it got warmed up, the O/D Off light came on and it would not go into high gear. The engine hit about 4K RPM at 50 mph but I got it home. I checked the O/D switch on the lever and it is ok. I am going to check the voltage on the lever to make sure there isn't a broken wire but I suspect it is ok since I can restart the truck and go about 300 yards until the O/D off light starts flashing. Anyway, I suspect bigger problems -- anyone out there experienced this?

By the way, in about 4 short test drives, I have not had a problem going in reverse.

Any help would be appreciated.
Jonboy