Those 'Lux's are indestructible, I have one (the 2.8), great for towing and long distance hauls, it just keeps on going forever, don't expect anything resembling performance though..... and I'm looking at doing the 3.0 engine and gearbox/transfer case swap..... Just for the added torques....
The 3.0's gearbox is stronger (than the smaller engines in the same line up), and the oil flow issues over the smaller variants have been resolved, so there's little chance of failure due to lack of oil/oil blockages.
Get it, you'll love it.