One thing you need to consider is how much weight the cattle guard is adding to the vehicle. Dump it and the spare tire and probably reduce the total weight by over a hundred pounds. Modding a big vehicle is like climbing a steep hill. Synthetic lubricants in engine, transmission and rear end will be simple and pay off in all driving situations. Air up the tires to the max inflation pressure. When the tires need to be replaced, invest in some low rolling resistant tires with a high inflation pressure. If you do not plan to tow anything, remove the hitch and shed another 50 pounds of weight.
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