Yeah I'm thinking the box is good (they checked it out & certainly dont to deal with a double comeback on it so likely it is right). I'd think the pump is OK (if it wasn't it'd affect both sides). I'm thinking as others said something somewhere up front is changing/binding but what. You know, what I just thought of is I'd have a helper slide on a creeper on the ground with hood up & eveball up there as you slowly moved the car forward/backward & turned the wheel (safely of course/good help is hard to come by). Do holler how it turns out