Re: towing with a 3.0 V6 Ford Ranger
JasonB, made some very good points. While the body may look similar in older Rangers, the underpinnings are different, in newer models.
For your interest, I have towed a 2000 pound load over 450 miles, over mountains, in the Southwest (San Diego to Phoenix. Six percent grades are a part of that trip-up and down.
The '04' Ranger with the five speed automatic gave me plenty of choices-on up/down grades. I never felt the load was "pushing" me.
I tend to set up trailers with plenty of hitch weight. That avoids sway.
A balanace betwwen hitch weight and load weight is achievable.
All in all, the Ranger is a very well built "stout" little truck. Tough as nails. If set up right, it pulls fine.