Ford F-150 Owner's Manual page 188

Tires, Wheels and Loading
Regular Cab 4x4 (126" wheelbase)
Engine Rear axle ratio
4.6L
4.6L
5.4L (with 17"
tires)
5.4L (with 18"
tires)
5.4L (with 17"
tires)
5.4L (with 18"
tires)
Regular Cab 4x4 (144.5" wheelbase)
Engine Rear axle ratio
4.6L
4.6L
5.4L (with 17"
tires)
5.4L (with 18"
or 20" tires)
5.4L (with 17"
tires)
5.4L (with 18"
or 20" tires)
5.4L Heavy Duty
188
2006 F-150 (f12)
Owners Guide (post-2002-fmt)
USA (fus)
Maximum
GCWR-lb. (kg)
3.55 11500 (5216)
3.73 12000 (5443)
3.55 13000 (5897)
3.55 12500 (5670)
3.73 13500 (6123)
3.73 13000 (5897)
Maximum
GCWR-lb. (kg)
3.55 11700 (5307)
3.73 12200 (5534)
3.55 14000 (6350)
3.55 13500 (6123)
3.73 15000 (6804)
3.73 14500 (6577)
4.10 15300 (6940)
Maximum
trailer
weight-lb. (kg)
6300 (2857)
6800 (3084)
7700 (3492)
7200 (3266)
8200 (3719)
7700 (3492)
Maximum
trailer
weight-lb. (kg)
6200 (2812)
6700 (3039)
8300 (3765)
7800 (3538)
9300 (4218)
8800 (3992)
9500 (4309)