I have a 99 f350 stock I did add issapro trans temp gauge. If I were to put a chip in it what would I need I am looking for better fuel milage and a little more power as I pull a 34 ft fifth wheel. Nothing to exotic dont want to tear it up.
If you are looking for a chip you may want to go with a 50 or 75hp single position chip. It'll give you the extra towing power + added fuel economy. You may want to add a pyro gauge too.
If you pull that heavy, I would look into a 40 or 60 tow burn, and an 80 econo position for a daily driver setting.
Generally, the 80 setting will give you the best MPG cruising, or running empty, the tow burn will give you the best pulling and in town.
I recomment Dp-Tuner, TS Performance, Diesel Innovations, and Twildman all have some good burns, as well as some others I'm probably forgetting.
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