FORD 1999 Explorer - Manual (Page 173)

Trailer towing table (4x4 and AWD with automatic
transmission)
Notes: For high altitude operation, reduce GCW by 2% per 300 meters
(1 000 ft) elevation. For definition of terms and instructions on
calculating your vehicle’s load, refer to Vehicle loading in this chapter.
Maximum trailer weights shown. The combined weight of the
completed towing vehicle and the loaded trailer must not exceed the
GCWR.
Towing a trailer over 1 588 kg (3 500 lbs.) requires a weight
distributing hitch.
Do not exceed the GVWR or the GAWR specified on the Safety
Compliance Certification Label.
Towing trailers beyond the maximum recommended gross trailer
weight exceeds the limit of the vehicle and could result in
engine damage, transmission damage, structural damage, loss of
control, and personal injury.
Preparing to tow
Use the proper equipment for towing a trailer, and make sure it is
properly attached to your vehicle. See your dealer or a reliable trailer
dealer if you require assistance.
Hitches
Do not use hitches that clamp onto the vehicle bumper. Use a load
carrying hitch. You must distribute the load in your trailer so that 10% of
the total weight of the trailer is on the tongue.
Use a frame-mounted weight distributing hitch for trailers over
1 588 kg (3 500 lb).
Driving
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