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Message: [QUOTE="Corb@CorbinShipping, post: 132550, member: 2499"] I also made a discovery. One that will undoubtedly lead to more testing.... I towed my 5th wheel from North Carolina to Orlando last week. And then towed it to Crestview, FL this past weekend. I had the SCT on TOW. I maintained 65 mph on cruise control, and left the trans on TOW/HAUL. I was kinda getting pizzed. It would downshift on several of the hills on I-10 West. EGTs were ok, I peaked at 1168 over 402 miles. But as soon as a hill would start, teh boost would get to 32 pounds, and bam, downshift... WTH? So, I remembered a discussion on here about towing in something other than TOW tunes, and I bumped it up a notch. with the SCT in STREET mode, I hooked up to the 16,000 pound Toy Hauler, and set out to find some hills. WOW! what a difference! much steeper hills, and the same speed, cruise control, TOW /HAUL on, peaked at 1080 EGTs, boost hit 39#s a few times, and NEVER downshifted! Also, I was getting about 2 MPG better mileage! May the testing continue.... [/QUOTE]

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