I might need to rebuild the rear end. I wasn't sure about the gear ratio to put in it. I have a TH350 and I was thinking 4.56s to run 40" Boggers, the tires on the truck now. Am I going to notice a difference with 4.56s or should I go higher? I still want to drive on the highway to work, but I also want it to get up and move. I drive the hog on a daily basis. In other words, ALL THE DAMN TIME!!