Originally Posted by sinbob
That seems a little high rpm for 55. I have 4.88 gears and I am running 2500rpm at 65mph on 35's
That is because your transmission has an Overdrive, his 3-speed automatic does not.
Jowen, 2500 rpms is about right for your four-banger, it needs those RPMs with the 3-speed automatic. Don't worry about them, I purposely geared my previous TJ so I was closer to 2700 RPMs on the highway.