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Have justin's 87 perf, 87 tow and 87 econ tune. I just leave it in performance, I love it it really changes how the truck drives. If you read about Justin's tunes it says that you can tow with any one of his tunes. I pull a boat that weighs in around 4,000 and for short trips to the local lake I leave it in performance, however if I am going down the highway a few hours I will then use the tow tune, which is a very good tune that helps hold OD on the highway without shifting back and forth.
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