I've been looking at a 2006 Wrangler (advertised as a Rubicon) and I went and drove it a little while ago. The dealership replaced the thermostat in it yesterday, but it was still running around 235-240 degrees. It was also taching 2800-2900 RPMs on the freeway at 60 mph (it has 35 inch tires on it). These two things kinda scared me off. Should it have? The dealer says it has a 4.11 rear diff, but I'm suspicious.