Sounds a bit like the issue I'm having with my 99 Dakota, sort of a wooo-wooo-wooo from the rear when turning slowly in parking lot maneuvers. I'll assume your Durango also has the 9.25" Chrysler rear axle. These were bulletproof axles but in the late-90s they lost that reputation. I've got a spare axle to swap in mine, but who knows if it will be better or not.