My 2004 RAM 2500 4x4 all at once started growling like it's on super mudder tires. It does it over 45 mph or so and continues even if I slip the trans to nuetral. 1st started only on deceleration, like from highway speed to stop sign. Is it rear gears? It is limited-slip. I do pull a small open car trailer with a A body several times each year and truck has 94,000 miles on it now.
Thanks for your thoughs, fix ideas welcome also.