JKs have BLD (Brake Lock Differentials), and there is an algorithm in the computer that distributes torque to the four wheels (drive by wire throttle). The computer determines how much torque is required and distributes power. In some ways, this system is better in mud than locked differentials. Besides, mud is about horsepower, RPM and momentum. MY JK has LSD and BLD, with a new set of 33" Dyna Pro M/Ts. Mud is no sweat. You really have to screw up to get stuck. In terms of technology, the JK is to all previous Wranglers like the F-22 is to the F-86.
My regards,
Widewing
You (possibly intentionally ?) didn't mention driver skill.
There is a Jeep Jamboree about an hour from here in the NJ Pine Barrens. They do it once a year, and this weekend is when this year's will be held.
I went one year. They charge $250/person (less for kids). The price includes meals, an hour mandatory training Sat. & Sun, and the trail guides along the way. Even with the training, it still doesn't help some folks. There are holes in the Pine Barrens that can almost swallow my TJ. The only time I got stuck (without being able to get myself out with the Hi-Jack, tow strap and/or come-a-long) was when I went on the Jamboree. The knowledge of the "trail guides" leaves a bit to be desired. I prefer the slow and steady approach, keeping the R's at a decent level, and not losing my momentum. Having me stop in the bog to wait for the numb-nuts in front of me to figure out what he was doing was the wrong answer. It was the only time I needed a recovery vehicle to yank me out. I will NEVER pay that much to go wheeling in a public place ever again. I will go this weekend, on my own however, and have a laugh with my son, watching them.

My TJ has the 4.0 inline and it was one of the reasons I bought it (it's an 06), while they were still putting them in. I've had a few Wranglers over the years and as far as I am concerned, nothing beats the old straight six. What I like is the reliability, the overabundance of parts for them, the ease of repair, and the power they make. I beat the crap out of all my vehicles, and they seem to hold up to the abuse the most. I like my torque range right where it is, and since it is a stick (and yes, I kinda dig the 6-speed), I can coax what I need out of the engine when I need it.. It's a Sport, so it has the Dana 44 like the Rubicon, but not the auto lockers (which I do not like to begin with as IMO they are horrible in the snow). I have never been in a situation (yet) where I wished I had lockers.
I don't need any more top end, and I don't like the fact that the V-6 makes the power in the higher RPM range. I need (and prefer) the low-end torque without having to wind it up too much. It is, IMO, harder to crawl over stuff when you have to juice it too much to get the pull you need. If speed is what I want, I'll take the '69 Goat out of the garage and go romp on it. The TJ is definitely NOT a speed machine. I've installed the flux capacitor, I just can't get the Jeep to hit 88mph
Just my .002
-Dan
"If I wanted a hummer, I would have called your sister"
O|||||||O .......there is only one. (for now, I guess)