Well, sad to report, at just 41 miles shy of reaching 222,000 miles my 4.0 took a dive, sounds like spun crank bearing / something bad internally at any rate, wasn't considering it as critical but my toque converter wasn't fully decoupling at stops, thought it was IAC initially but put into neutral and resolved it during "events" ....think it taxed engine, anyway I don't have a lot invested in WJ, just a daily non-4x4 (have 4wd Ford) ....but if I can find a very reasonably priced 4.0 that I can get 3-4 more years out of it would consider the purchase / personal labor investment.