What is the recommended weight I should turn my tow haul on/
Exact same with me. Keeps the temp way coolerI use it all the time, with and without a trailer. It helps with braking, also holds the shifts a little longer, good for racing. I only turn it off when I turn the cruz control on for long drives open road. It will not hurt anything,
and it has no affect on transmission power holding capability. So putting it in tow/haul isnt gonna make your trans able to run level 5 without slipping or anything like that.The Tow/Haul is just Locking up the Torque Converter. Has nothing to do with your programmer's input.