[Jonboy]

If the front hubs are manual locking, make sure they are locked in when you are in Hi-Loc or Low-loc. The original hubs were not locking, they were always locked in. The theory behind the manual hubs it that it will save a bit of fuel if they are unlocked when not needed. If there are manual locking hubs on the truck, there is a decent chance that someone might have installed a part time kit in the transfer case. If that is true, then the "Loc" positions would be 4WD, and the hi and low positions are 2WD. I believe you need to lock in the transfer case every few hundred miles to lube the case if it has been converted.