I have read in these forums, and found 3 possible culprits
1. The radiator's bottom rows may be clogged and the tranny's cpu believes the temp. is getting too hot for operating and throws itself into failsafe. -------but i had the temp checked at a local mech. that is pretty good and he states the op-temp is good.
2. The battery may be going bad and could possibly be causing the disruptions.
3. The tranny's gear box module/ better known as the high/low motor transfer box is going out.... I also noticed that I could not switch it into low from neutral this last time and that while driving the range it jerks a little when getting off of the accelerator.
PLEASE HELP!!!!!! DONT WANT TO GO TO THE STEALER, THEY NEVER SEEM TO KNOW ANYHOW WHAT THE REAL PROBLEM IS OR THEY JUST WANT TO PUT IN MORE FAKE WORKING HOURS.