If You have Manual Locking Front Hubs, Then the 4 wheel drive will not work/drive the front 2 wheels at all without, Locking-Them-In . Do Not Lock and use the 4 wheel drive on Dry Pavement.
the truck has hubs. 4x4 front wheel bearings are not serviceable.
did you get out of your vehicle and physically lock the hubs on the front wheels? there automatic locking hubs.
IT MAY HAVE TO DEAL WITH WHEEL HUB OR HUBS OUT OF LINE! OR GOING OUT . IT MAY HAVE TO DEAL WITH WHEEL HUB OR HUBS OUT OF LINE! OR GOING OUT . IT MAY HAVE TO DEAL WITH WHEEL HUB OR HUBS OUT OF LINE! OR GOING OUT .
The Ford locking hubs allow you to manually disconnect the front wheels of your vehicle from the front half shafts. This basically shuts the 4 wheel drive off.
The hubs lock the axel to the hub, which drives the wheel. With the transfer case in 2WD, the rear driveshaft drives the rear wheels. Without front hubs, in 2WD, as the front tires roll, they spin the axles and the front driveshaft. With lock out hubs, in 2WD and the hubs unlocked only the tires spin. However, in 4WD if you forget to lock the hubs, only the driveshafts and axles spin. When I lived in MI, in the winter I always kept my hubs "locked", this way I could shift into 4WD whenever I needed to without getting out in the cold to "lock" the hubs.
One for each wheel.
Normally both wheels on a single axel revolve at an identical rate. Vehicles with auto-locking hubs have sensors that monitor the speed of each wheel independently. If a speed differential is detected meaning if one wheel begins to spin faster or slower than the other wheel, a solonoid (switch) is activated releasing the hubs such that they can spin in and lock. Because only one wheel has torque at any time, if there is a differential speed between the 2 wheels, it means that the torque wheel has broken loose.
the vacuume lines and hubs are damaged. chenge the hubs over to Warn style hubs. Look on the net for info on warn hubs.
Although you have a manual shift on the transfer case the hubs lock in on vacuum. Chances are you have bad vacuum lines going to the hubs (about $150+ at a Kia dealer or $40 at your local service station). If not the lines, it will be the seals in the hubs.
if the hubs are working properly all u do is shift transfer case back to 2WD if hubs are not releasing you will have to check the hubs best idea change the auto hubs for warn manual locking hubs
i believe its a automatic friction lock if u don't have manual locking hubs