Ford 1999 Explorer Owner's Manual page 171

Trailer towing table (4x2 automatic transmission)
GCWR (Gross Combined Weight Rating)/Trailer weights
Rear
Engine axle
ratio
4.0L 3.27
SOHC
4.0L 3.55
SOHC
3.73
4.0L OHV
4.0L 3.73
SOHC
4.0L
3.55
SOHC
4.0L OHV 3.73
4.0L
3.73
SOHC
4.0L
4.10
SOHC
5.0L 3.73
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.
Maximum
GCWR-kg
(lbs.)
2-door
3 402
(7 500)
3 856
(8 500)
4 082
(9 000)
4 082
(9 000)
4-door
4 082
(9 000)
4 082
(9 000)
4 535
(10 000)
4 535
(10 000)
4 990
(11 000)
Trailer Weight
Range-kg
(lbs.)
0-Maximum
0-1 361
(0-3 000)
0-2 041
(0-4 500)
0-2 313
(0-5 100)
0-2 313
(0-5 100)
0-2 041
(0-4 500)
0-2 232
(0- 4 920)
0-2 676
(0-5 900)
0-2 676
(0-5 900)
0-3 057
(0-6 740)
Driving
Maximum
frontal area of
2
trailer-m (ft
4.64
(50)
4.64
(50)
4.64
(50)
4.64
(50)
4.64
(50)
4.64
(50)
4.64
(50)
4.64
(50)
4.64
(50)
2
)
171