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swimmer_spe's avatar
swimmer_spe
Explorer
May 30, 2017

Shift! **** You Shift!

I have a 2013 Ford F150 5L V8 Long box extended cab 4x4. I was towing a 1999 Rockwood Ultralight 24' travel trailer. The thing doesn't even weigh 3000 lbs.

There was this magical speed where on the flats, it would constantly be shifting up and down from 5-6. One click up on the cruise control, it would stay in 5th. 1 click down and it would finally stay in 6 for more than a couple of seconds.

I had Tow/Haul on. Does anyone know why this happens or what I can do about it, besides "just driving slower"