One more question, gentlemen... We have to get the trailer to the dealer for some warranty work. It's about 60 miles one way, gradually downhill from 3000' elevation to less than 100'. They will ...
Are you sure it is 1000 miles? On my F350 the manual stated 500 miles to wear in the differential gears.Maybe you are closer then you think. In our case we got the truck on a Friday, took a 125 mile trip and left on Monday for Yellowstone with our 5th wheel. Differential is still quiet and never has much debris on the magnet almost 9 years later.