In about a month I will be changing gears in my axles in my 2015 JKU w/automatic transmission. I am currently running 3/73's on 35" tires. So I have 2 questions. Roughly what should I be looking to pay. I will NOT be doing this myself. 2nd question is I was told that 4/10 gears may not be enough. I don't want to be doing 65mph at 3500 RPM's either. Any suggestions? I never had to do this with previous jeeps so I am totally in the dark here.