I towed a 17' 6" tin boat with a 90 hp motor for a decade up and down hilly Pennsylvania using a FWD "SUV" built on a unibody platform - a 2002 Mazda Tribute (Escape clone). And yes, occasionally it would spin a front tire going up the ramp but I would take the radical step of putting the gear selector in "2" and it would walk up any wet ramp without a bit of drama. As for the transmission, I changed fluid under the severe service schedule until the "SUV" met its untimely demise with a utility pole at 209,000 miles.
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