I just put in a new 10blt and I'm putting in my new 14blt over christmas on my k10 sub. The 14 blt has 4.56 gears and a detroit locker in it allready. I don't even know what is in the 10blt. I really want to run 4.11 gears (I am putting on 34" tires) how big a difference is there between 4.11 and 4.56. Is it worth the money to switch both to 4.11 or should I keep the rear and just switch the 10blt? This truck will be driven on the road some, even the interstate a little. It has a new crate 350 ready to go in from summit (not droping it in till I do the body work). Any ideas would be great. I will not be doing any hauling with this truck.