40 Series with stock 4.11 gearing: Going on 33" tire size: 4.56-4.88, 35" tires, 4.88-5.29, 37"+ tires, 5.29 ratio ring & pinion.
40 Series with stock 4.11 gearing: Going to a 33" tire size: 4.56-4.88, 35" tires, 4.88-5.29, 37"+ tires, 5.29 ratio ring & pinion.