Duece you have just described a common happening for EVERY 4X4 on a hard surface.. The tighter the turn the quicker and harder the vehicle will JUMP and POP!
This can also happen in a tight turn on seemingly loose terrain.. If the tires get a good purchase and the steering wheel is turned the difference in radius between the front and the rear is the cause of the popping.
STOP keeping it in 4 wheel while on a hard surface.. If 4X4 isn't needed TAKE IT OUT!
There is nothing wrong with your vehicle.. The driver needs more education about how a 4X4 works.
Big Jim <img src="/forums/images/graemlins/pfft.gif" alt="" />