I'm assuming that I got the right gears which came from Chevy Duty. Only thing I can think of is that I'm traveling faster MPH than I thought. My speedodometer says 55 and feels like thats pushing it. Maybe I'm going faster but have not had a chance to check the speed. (ice storm here) Will check that with my GPS to get the exact MPH. At 60 mph it feels like I'm pushing it. Engine runs smooth and everything. I have 15" tires on the truck. Just does not feel right.
