4 Hi Hesitates

When making a turn in 4 HI truck hesitates?????????

Assume your making a right turn, the tire on the left has to rotate more times to cover the outside distance then the right tire does to complete the turn. Since the front tires are locked (mechanically) to rotate the same amount, the ground friction to the left tire is attempting to force it to rotate more than the right wheel, which it can't unless the tire looses traction or you drive train crunches some gears, which besides being an inconvenience can be downright expensive. That's why the manual requires you to use 4 wheel hi and 4 wheel lo on slippery road conditions.