When my TT brakes are cold, I set the gain to 1 and they grab just enough to feel right. After they warm up, they grab a lot harder and I have to drop the gain setting down to 0. Don't know if this is common, but it's the way my brakes have always worked. Maybe before setting the brake controller adjustment, a prior trip to warm up the brakes should be done.
2011 Dodge Ram 1500 HEMI Quad Cab
2011 Jay Flight 26BH