I would definently put gears in if you are going to run 35's then I'd run 5.29's, and for 33's I'd run 4.88's you could even run the 5.29's with the 33's. I run 31X10.5 BFG Mud terrains with 4.88's, I love me gearing, I have power to get up hills and to tow a trailer.