I used my '99 F-150 (2wd reg cab)to tow a bumper pull 3 horse slant. We moved to Northern California at one point from Houston, TX. I had 2 horses, hay. Tack and some furniture and my F-150 did great. I believe it was rated to tow about 9,000lbs. I later purchased an 04 F150, 4x4 extended cab. It was rated to tow 8,000lbs. It also depends on what size motor you have. The V8 came with a 4.6L or 5.4L. Mine had the 5.4
You can probably call Ford and ask what your vehicle is rated to tow and they could tell you.