I feel that one must take towing with a Transit somewhat conservatively, meaning things like a gross trailer weight of 1500-1800 lbs. also, as already noted, keeping the trans. out of overdrive with the possible exception of downhills. Reason for all this conserving is that the motor and transaxle assy. are Focus products and though of good quality still a light passenger car unit. We really are talking about what kind of life should be had while towing with our Transits and my many years of automotive repair and parts tells me that driven prudently this vehicle will go a long ways, towing or not!
I think that FORD is fearful of customers loading excessively, towing ridiculous trailer weights, and resulting in breaking drive train components, engines, brakes, wheel bearings, etc. etc. The last thing Ford needs is this great design to garner a rep. for being a lemon, even if caused by a handful of not very knowledgeable owners.
Richard