I recently had the passenger rear axle replaced on my 2003 mustang gt. I picked it up and the abs system was having problems (Pulsating under 5 mph). You could feel the abs system trying to work but it couldn't. I took it back and they checked the rear and everything was good. The checked the front, everything was fine. They then read the speeds on all four wheels and at 50 mph, both rear and driver front read 50 but the passenger front reads 80... They checked the front again and everything is fine... They have no idea what would be causing this and neither do I. I know i could take it to the dealership but i prefer to not get bent over by their prices... Any help at all would be greatly appreciated! Thanks!