We have a 2000 Jeep GC with the 4.7L V8 and it pulled my BX23 (loaded into a dump trailer) just fine. Keep the overdrive locked-out.
To control this mass of metal, I installed a Prodigy controller. The Jeep already had a trailering package...but no electric brake. The good news is that there was a blue wire factory-installed that was there for the brake. As I recall, I connected +12V, Ground, the magic blue wire, and a line to one of the wires that went to the break pedal switch (not the "always hot" wire, BTW). The Prodigy simply needs to know when brakes are applied. I also installed a 30 amp self-resetting circuit breaker on the 12V line that I ran all the way to the battery. (Remember, you just don't want to grab 12V just anywhere as it may be fused. Like the cigarette lighter.) Since I used a 30A breaker, I used 10 gauge wire.