The rear differential limited slip DANA 60 of my 1996 2500 4 x 4 has been growling for the past several months. The noise is on turns only, not while driving straight. 148,400 I finally got to the dealer and asked him if is it the transmission or rear end. He said to replace the oil and add the MOPAR special lub for the limited slip DANA 60 that I have. Did it over the weekend and the noise is completely gone. 
