I had a place called drivetrain specialists do the gears. They are located on groesbeck highway in Warren, mi. They charged me $1250 out the door for front and rear gears installed. Very happy with the work, they were awesome to do business with and they had the truck done the same day that i dropped it off. They specialize in rear end work and really know what theyre doin. I had 3.42 as well but with the 4 speed trans and the 4.56 gears made a huge difference. drives like its stock again instead of the trans going back and forth between gears. And thanks man, i appreciate it!