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Folks...thanks for all the replies. Though against recommendation, I did go ahead and purchase the SuperChips tuner. We tuned the truck with the "light tow" mode (less than 8000 lbs.), so as not to risk damaging anything. I did notice a more positive transmission response....shifting was more positive, quicker, etc....but the power addition was maybe 10% better. This was confirmed when towing again to the same campground we've been to the last three trips. Which was good to compare against since it was the same terrain, grade, etc......still only about a 10% improvement in power. On the highway I had a little peddle in reserve at highway speeds vs. having to keep it on the floor. Climbing the slight grade I was able to run about 10 mph. faster, but still topped out at 55-56 WOT....and again only on a slight grade. QUESTION: after all the testing, troubleshooting, etc....could this just simply be a worn out torque converter? Was chatting with someone and they really felt that it sounded like a bad or worn out torque converter. Would make a lot of sense with the terrible fuel mileage I get, and my constant complaint that it just simply feels that all the work the engine is doing just isn't getting tranferred to the pavement. I don't know much about torque converters....would it be possible for one to be worn out from heavy towing before I bought this truck, and then it not completely break down since I've had it for a year? Could it be worn out, causing my problems, yet still operate at enough of a level to keep the truck driveable for a year?
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