When I had the bottom down on the back of the monty, I noticed that the square tubes that have the rack (teeth) on the underside slide into another tube that is welded in place and that tube was totally dry inside with spots of light rust. So I used lube to coat the insides of the tubes, ie preventive maintenance. So if that is the source of the noise, then one has to drop the bottom. John
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2012 F350 6.7 L dually, 2013 3800RE with 6 pt leveling, Sumitomo 17.5" load range h tires, Samsung 18 cu ft residential fridge, 8k Morryde I.S. with disc brakes. Full timing since 2012.
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