Yes, that's why I'm thinking go lower numerically. With such light weight you're not going to have any trouble getting it moving. I'm at 29k lbs. fully loaded water and fuel. I never use 1st gear. More often I start out in 3rd gear. If I could start out in 4th I might do that. My son's truck is about 17k bobtail. He starts out in 5th or 6th when bobtailing. I think you could figure out the gears yourself since that shop doesn't seem to want to do it for you. Let's try to figure it out here. What size tires you got? Exactly what transmission is that? Is 9th gear 1 to 1? or some overdrive gear?
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'03 Freightliner FL112, 295" wheel base, with '03 United Specialties 26' living quarters, single screw, Cat C12 430 h/p 1650 torque, Eaton 10speed , 3.42 rear axle ratio
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