7700 is in low range. I doubt a 22ft boat is going to max out the 5500lb rating. You'll be fine. I tow my 23ft with my D2, no problems at all.
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Land Rover-less.
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2006 Infiniti QX56 - Loaded
2002 Discovery II SE - SOLD!
1999 Audi A6 Avant Quattro Tiptronic - Slammed on RS4 18's
1996 Mariah Talari w/350 Mercruiser and Ron Hill Marine Go-fast parts.(Presently in Dry Storage)
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