I have the same condition, and I recognize that it's from being in 4WD, BUT! . . . I've tried, numerous times, to get the T-case OUT of 4W mode and back to 2WD, but I can't make it happen. Interestingly, when I get on some snow and spin the tires, only the rears spin...yet I still get the 4WD bump on dry pavement turns. Any suggestions?