The Liberty CRD is on another level altogether than the V6 trucks. They were only available in 4wd (Selec-Trac Via NP242 transfer case), got the much heavier-duty 545RFE transmission (6 total ranges plus transmission cooler for all models, not just towing package vehicles), a 29-spline Chrysler 8.25 axle (comparable to a Dana 44 in strength), 4-wheel disc brakes with stability and roll control, and 1100 lbs of total rated payload. It's a tough little bugger.
They have their quirks, but if you know your way around a vehicle, they're easy to correct.