I've been noticing a popping noise coming from the rear end,I'm suspecting that it is the posi clutches as it only pops when the car is in a slight turn at low speeds (less tha 5 MPH) Its been there since we owned the car (2002) but since we did't drive it much I didnt give it much thought ,but mow I am driving much more and it is making me nervous. Could this possibly be the clutches due to the vehicle sitting for a long period of time . A little history ..my wife and I inherited it from her father who owned it since 95,he bought it off the original owner with only 30,000 original miles on it,any suggestions? when the car is going straight .. no noise. could simply changing the fluid solve the problem?