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  1. 07.5 - 09 3rd Gen 6.7 Liter General Discussion
    So I was towing a 28ft travel trailer roughly 6,500 pounds on the interstate going about 70mph. When I would start to climb a hill I felt like I was lugging the motor with my foot to the floor struggling to maintain my speed. My rpms we’re jumping up to 2500-3000. The truck is an 07.5 6.7L 4x4...