When I bought my car, I did a carfax on it. It showed that the car was in a wreck and that it has had previous rear end problems. When I bought my car, it had a small whine coming from the rear end and it has been getting worse. I took the rear end cover off and checked the inner bearings. They seemed to be good. There was a small amount of metal shavings found but not much. I am preparing to replace all of the rear end bearings and seals but one of my mechanics said that since the car was in a wreck before, the axle may be twisted or tweaked. Is there a way to check my axle for its straightness. I don't want to buy new bearings and replace them if it is the axle that is the problem.