Well, I am not responsible for any accidents you may have from doing this..... but from experience I can tell you that a truck will tow more than it's rated at.

For instance, my father and I recently towed a combined 29,000 lbs. up a steep grade coming out of the Kentucky River valley with his '02 Dodge Cummins. That truck is not rated anywhere near that kind of weight, but the truck will do it and the trailer had brakes on it, so we did it.

The Ranger will probably handle much more than a 6,000 lb. trailer / load if the trailer has brakes. The question is, do you want to risk being in an accident and having to explain to the officer that you thought it would be OK?

It's a matter of choice. Stay in the owner's manual guidelines to be safe. If you don't care about the risk, yeh, the truck will do more.