So I just got my new 1993 NJ and thought id see how the LSD worked(never owned anything but open diffed truck). So I push the front left wheel up a slope on this dirt track so i can see the rear wheel thats under compresion (back right). Anyway the back left wheel starts spinning and it takes 3 to 5 sec for the back right to do anything, it then turns once then I here this grinding sound so i stop. So should the lsd take this long to kick in and should it make such a sound. Seems to me it took far to long to do anything but then again i have never owned a truck with an lsd befor so meh. Some feed back plz could it be worn or low on oil or what?