I have a Tru-trac in the front of my '00(Auburn cone-clutch LS in the back). 'Love it. I believe there is a maximum recommended tire size, but I bought mine used without the documentation, so I'm not sure. On the street, you don't know it's there. On the trail it quietly does it's job through some really tough stuff. 'Need a little more traction? Tap the brakes and it locks up hard.
The only real problem is cost. The Tru-trac, new, costs almost as much as a Detroit locker, and almost twice the price of an aussie-locker or lock-rite. It's a full case install, and requires re-shimming the carrier for ring gear backlash. If you have stock gears and are looking at going lower in the future, the stock -30 gears in the jeep bump up against the carrier break. That means if you later go lower(numerically higher then 3.55 gears), you need to get a new Tru-trac. Your best bet is to re-gear when you do the install if it's in your future. Remember what I said about expensive?
On the other hand, it is probably the best LS made. I think it's worth it. Also, you can buy them used safely. Since they're gear driven, they don't wear out. As long as it's not physically broken, it will work.
