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Message: [QUOTE="B.Warning, post: 651784, member: 874"] I'm having the same issues with my 550 truck. It has 4:88 gears and with a 31"tall 19.5 and a 6spd I'm cruising at 2700 @70mph. I'm going with 22.5's to drop my rpm on the hwy. My problem now other than the screaming high rpm and ****ty fuel mileage is that it seams when loaded with a trailer in tow is my rpm is so high that I'm out of the effective rpm range where the motor is making torque and doesn't pull as well. I drop my speed to 60mph @2200rpm and it'll pull hard up hills. [/QUOTE]

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