I have a 3in body lift installed and I'm preparing to add a 6in suspension lift. I would prefer to do the gears before the suspension. What gears would be recommended and from where. It looks like I will run 37x13.50.17 tires. Most driving will be on the road and sometimes pulling trailer with 2 750 lbs bikes on 300 - 400 mile trips.
So suggestion of gears and were to get them would be helpful. I will be installing myself like I do everything else.

 

4.88's will be your best bet!