Originally Posted by FX4dude
Highway crusing with 3.73: The stock truck cruised under 2,000 RPM. Great!
What kind of speed are you rrunning, 70-80 mph?
On my 3.55 rear with a 4.6 engine I can run 80 at just a hair under 2000 rpm's. 55-60 is the sweet spot for gas mileage though. 70 mph is about 1800 rpms.