Vehicles with short wheelbase like a wrangler are less stable with a load behind them. And the suspension which you want for great articulation is also not the same suspension you want with 650 pounds on the tongue. We own a RAV4. I would *not* want to put more than 2,000 pounds behind it. The unibody itself doesn’t feel like it would be up for the challenge. Put a 275lb male in the passenger seat and the whole vehicle rides funny. Likewise, I wouldn’t want more than 3,500 behind a 2 door wrangler just because they can’t even manage their own weight on a wet off-ramp in the hands of many drivers. 4 Door has a longer wheelbase, but again, a nicely articulating suspension can’t be stiffly sprung in the way you’d want for pulling 5,000 pounds - two different purposes.