Is it possible to adjust the parking brakes on the Challenger (I have to assume it is, but how)? I have a 2015 SRT with the Brembos if that matters. I've noticed that on steeper hills, the brake won't always hold tightly; there's enough slip to let the car roll back as much as a foot or two. The pads are still nice and thick, so it's not that. Back in the old days, on my drum-equipped '70s era cars, you could adjust the parking brake by reversing the car at a good clip and slamming on the brakes, which forced the adjusters in the drums to ratchet up a bit, but that's not going to work with rear discs.