Well, we will never know for sure. I just got it home after I took it for the first test drive and it drove fine. Mostly what he did was flush the brake system twice and it had some trash in it. It looks like it had some moisture in it. I drove it in town then then paid him and took it home. A country highway with little traffic so I did some panic stops with no problem and a good brake feel. Hoping that took care of it.