Quote:
Originally Posted by 66joej
Don't really understand your calculations. For instance 2013 Ram 1500 5.7 quad cab, payload is the same for all 3 rear end ratios (1680#)yet tow ratings for 3.21 diff is 7000# and for 3.92 diff is 10500#. Both trucks are exactly the same in everything except the rear diffs. Would your method still work?
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The reason is manufacturers ignore payload. They advertise max tow, which "varies" by capabilities (rear end, etc)... but ignore payload. The only way to achieve those trailer weights without exceeding payload is to have a light tongue.
In some utility trailers, with some loads, you can place most of the weight over the axles and have a lighter tongue and not be too unsafe. For TT's, the 15% rule really should apply. Therefore, payload is the limiting factor before max trailer weight comes into play.
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