I have a 2015 F350 Dually, with my gain set to 7, it will darn near pull the trailer apart from the truck... I always do a brake check on the roll from our spot (still in the RV park), people have stopped mid step watching that big trailer lurch to a stop. I admit, unsure if all 6 tires lock up, but the trailer does stop.
Cale
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TV: 2015 F-350 DRW, CC, 4x4, with 14k GVWR package, 98 gallon TransferFlow Aux Tank, Timbren Shocks
TH: 2014 Voltage 3950, Sailun S637 all around
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