2008 Hino 268 with 260k miles on the clock. Front and rear brake pads are 60-80%. Running the truck at 35 mph and I stick my foot all the way into the brake pedal, she doesnt want to stop nearly as well as the other 268's I've driven. I replaced both front brake lines bc I found one line chaffed and wearing. I bled the brakes, test drove and I still yield the same result. When the tires were being replaced, I stuck a big flatblade screw driver in the caliper to make sure they weren't seized. This is a new to me truck. It looks like its spent some time back east due to the surface rust I see and how difficult it was to break the lines free. Penske turned the truck loose and its been in CA for at least 5 years if I had to guess. So the million dollar question, where do I start to trouble shoot weak brakes? I had the dealer test drive it, the tech had no suggestions other than he could only guess that someone did a pad-slap along the way. I think there's more going on than just this.