Sadly I won't notice the sound difference because of the Cummins swap - the biggest weight change is in the front, but in the rear I do have HD springs but only carry about 250lbs of gear in the rear regularly, and that's with the 3rd row of seats out so it shouldn't be over loaded in the rear...
I am replacing the driver's side rear axle outer oil seal today - looking at the axle shaft itself where the bearings ride, does this seem normal to have such a deep groove or do I have a problem I am unaware of? Bearing itself seems to be visually in great shape and in working order as I spin...