My 2009 HD had no issues with the 3.73 axle ratio with our 31’ pull trailer. Got a new 2017 in late August and they all now come with 4:10 ratio for the 6.0L gas motor. Should be better for pulling, guess we will see come summer. The new truck has a larger fuel tank over the 2009 so that may help in some more distance to drive before fueling up.
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