I recently totaled my Jeep Grabd Cherokee. I had 165,465 miles on it. It was absolutely reliable until 150,000 miles when the power steering, starter, and catalytic converter went out. I bought it with 7k miles on it and it was the best vehicle I ever owned. Wife is now driving the 2005 Grand Cherokee. I also had the problem with the differentials. Don't let the dealer scare you! They pressured me at 90,000 miles to replace them. Well at 165,000 miles they were still holding up. I also did not let them mess with the transmission.