I noticed right away I wasn't getting the proper fuel economy I thought I should get which was 12 city 15 hwy. I made some timing adjustments and a basic tune up, in 4 years the best hwy mpg I've gotten was 18 mpg. Don't expect any more than that. Another problem I've encountered is severe wheel hop at hwy speeds, it almost jumps off the road when you hit a bump. Very very unsafe. FYI... don't forget the change your ball joints, if they haven't already gone out, they will!
Shift on the fly 4x4, and four wheel limited slip differentials. Best thing dodge did. It sold the truck for me.
Better fuel economy. Standard cd player. Different suspension set-up.