I'm a newbie to the forum but I had my '77 CJ-7 for about 8 years now. My question is related to a 1993 TJ that is sitting on a jeep dealership lot around to corner. It has the little 4 banger in it with 165K mi, and I have no idea how long these little buggers last. I crawled under it last night after the dealership closed and there is no signs of rust and only a little sign of leakage around pinion shaft front and rear. I looks like it has been take well care of and I think it might have been a tow vehicle judging by the mileage and two wires coming out between the left headlight and the grille. The reason I'm looking into it is the engine in my car is knocking and I need replace it before it goes out.