We have used our Grand Cherokee as our main family transportation for almost seven years now. Bought it used with 69000 from a private owner. We use the 4wd regularly on our mini-farm and camping trips. We've never had any 4wd issues. Rebuilt the trans. for the first time at 190000. Other work Ive done other than the regular maint. is a water pump, brake booster, trans. speed sensor. We've been very pleased with the 4.0 in other Jeeps we had too. It's a big inline 6 so do not expect great mileage, but its got reliability and performance. The key to Jeeps from my experience (this is my 3rd) is keeping up with the routine maint. especially oil/fluid changes. Have fun, get outdoors!
Selec-Trac reliable, Never been stuck in a variety on off road environments. 4.0 liter inline 6
Head lights haze and become unsightly, so replace with aftermarket ones(easy to change at least). Taillights have issues warping around bulb socket which causes symptoms of a light out, but it is really a poor connection. I use foil to improve the contact, but it weakens over time.