201401 - Call 07

Tyler
Buckner
Chapel Hill
North Carolina
The brakes make a knocking sound which speeds up as the car speeds up. It goes away when he steps on the brake and comes back when he takes his foot off the brake. Tom and Ray say it's likely a warped disc or bad caliper. It could also be something more serious, like a missing bolt on the caliper, so he should get it looked at soon.