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Here is Ford's RV & Towing Guide for 2011.
On page 18 of "Trailer Towing Equipment", Expedition/Navigator
• For trailers over 6,000 pounds – Heavy-Duty Trailer Tow Package is required.
Under "FRONTAL AREA CONSIDERATIONS", Expedition/Navigator:
- Base Vehicle Frontal Area (35 sq. ft.) Without Heavy-Duty Trailer
Tow Package.
-60 sq. ft. With Heavy-Duty Trailer Tow Package.
I found that the Heavy-Duty Trailer Tow Package consists of:
Class III/IV Heavy-Duty Trailer Tow Package
Frame-mounted, heavy-duty trailer hitch receiver with 4- and 7-pin wiring harness;
brake module wiring
Heavy-duty radiator, flasher and transmission cooler
Rear load-leveling air suspension
in the Ford 2011 Brochure on page 12.
Back on page 29 of the "RV & Towing Guide" it states:
Navigator L: 8700# max trailer, 870# max tongue load, (with HD hitch).
I would pay special attention to that 870# max tongue weight.
On page 18 of "Trailer Towing Equipment", Expedition/Navigator
• For trailers over 6,000 pounds – Heavy-Duty Trailer Tow Package is required.
Under "FRONTAL AREA CONSIDERATIONS", Expedition/Navigator:
- Base Vehicle Frontal Area (35 sq. ft.) Without Heavy-Duty Trailer
Tow Package.
-60 sq. ft. With Heavy-Duty Trailer Tow Package.
I found that the Heavy-Duty Trailer Tow Package consists of:
Class III/IV Heavy-Duty Trailer Tow Package
Frame-mounted, heavy-duty trailer hitch receiver with 4- and 7-pin wiring harness;
brake module wiring
Heavy-duty radiator, flasher and transmission cooler
Rear load-leveling air suspension
in the Ford 2011 Brochure on page 12.
Back on page 29 of the "RV & Towing Guide" it states:
Navigator L: 8700# max trailer, 870# max tongue load, (with HD hitch).
I would pay special attention to that 870# max tongue weight.
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