Welllll.... I just had a long converstation with the Ford dealerhip
(Westway Ford, Irving, TX) about the gear ratio in my truck. They installed all of the lift kit, tires, wheels as package before I bought it. I asked them why they didn't change the gear ratio from 3:55Ls to one (4:10, 4:56) that would be better rated for this conversion....now here is where it gets good....the Service manager tells me that it would be against the law for them or any other shop (a violation of EPA) to change the gear ratio of a vehicle and it would also void any warranties to the drive train! Looks like my plans have been altered (I only have 27000 miles on my truck with a 60000 mile warranty)....he said that they would have to reprogram (duh!! and I didn't tell him about my gryphon...hope he doesn't belong to this forum) the truck if they did that and that would not be in the specs and against the law (EPA)....geeez...this stuff gets deep!