Why did I not have front wheels spinning?

[tomp]

I got high-centered this morning. Was in low-locked and only the back wheels were spinning.

I was going uphill and high-centered as the front wheels went over the top. There was plenty of force down on the front suspension and I could have really benefitted if the fronts were spinning as well. Why does this happen?

[drmiles]

Transfer case in 4 Hi, not 4 locked. Locked forces the front to spin with the rear. 4 Hi directs more power to the rear 60% (i think).

[f5fstop]

If you are in four wheel HI mode, the traction assist system applies the brakes to the spinning tires to allow all engine power to the other wheels. Spinning tires give no traction.

[Dug]

DO you know if the fourwheel drive was working before you noticed the front wheels were not spinning?
When you was in low lock, are you sure the tire on the opposite side of what you could see was not turning?
Trying to help narrow down the possibillities.

[tomp]

At part throttle, nothing was spinning. Then, when applying more throttle to make it over the top, the rear would break loose and spin. Fronts never would move while rear was spinning as both fronts were on the ground and I was sitting still.

Only way to make it over was to reverse and build up some forward momentum.

Also tried slightly mashing the brake during throttling and that did not do anything

[tomp]

I will have to try this move again next time I'm out. However, it did happen several times over this weekend.

Any idea what keywords I could search on to bring up those threads that show each mode? IE, TC, TC2, 4x4 hi, 4x4 low, and 4x4 low-lock?