Ok I got an 04 F150 Supercrew 4x4 SB with the 6" FabTech lift on, 35 x 12.5 x 18" Toyo M/T's, Airraid Airflow System and a MagnaFlow 3" Exhaust, now the next thing I need to do to the Wife's F150 is to swap gears. I am running the factory 3:73's in it now. I want to go with 4:56's as I tow a boat, camper and an off road jeep with it. I got 4:56's in my jeep with 35's on it, so I assume the same would apply to the truck. I think 4:10's would not cut it since I do alot of towing. Can I get some feed back if there is anyone running the same set up and towing too. I want the "Grocery Getter" to come back close to stock as possible.
Thanks.......................

 

4.56 will put you right around stock, maybe 50 rpm above or below stock,