From a practical standpoint, exceeding specs by small margin may/may not lead to issues stated above. On the other hand driving at max weight may kill acceleration and general ability to merge, pass when needed depending on gearing, may be a big difference.
From the stanpoint of functionality, do you really want to be concerned with watching add on weight before trips?
We tow a lot, the unit is rated 22,000 GCVW. Normal weekend trip is 18,000. The highest has been 18,750. Using an open race car trailer eliminates the 2500 lb parasitic weight of an enclosed trailer. It also means dragging trailer anywhere on SE carries little mpg penalty.
Is one those can you do it or do you really want to do it questions?
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