Disagree with the above, and I have real experience as I still own a 2000 grand cherokee lerado with the v8. it now is passed to my daughter whom has driven it over 100k during 8 yrs of college and now has 235k+ plus miles on it and it is still tight, quiet and reliable. never had any transmission issues, zero electrical, hvac, windows, leather power seat motors and heaters...nada, nothing. The engine had a known sludge issue so chrysler cleaned the engine under the 100k warrantee and then we have used mobile one high mileage oil ever since and the engine is still spotless, at least looking at the valve train via the oil cap. we had to replace corroded brake lines on the rear about 5 years ago, new e-brake cables once, water pump has been replaced and the thermistat and hoses were done for good measure as it had over 100k on the odometer at the time. spark plugs twice and the front trailing arms for the live front axle were replaced as the bushings were shot, the shocks have been replaced andthats it, under 2k in repairs in 18 yearsand 235k miles. It is still on the road running great for my daughter who will graduate in a couple weeks after 8 yrs of college and she has not mentioned replacing it, she loves it and keeps it like new inside and out. No rust through yet and the white paint still shines. So thats a real world experience with 18 years of ownership.
EDIT; I forgot that we replaced the windshield because it was badly pitted...that was just before my daughter took posession in 2010...I believe it was about 300 dollars.