Quote: Run this though the rear end housing with a pool pump for a few hours... Rust remover
I agree that this and other similar products like Evaporust and Unrust will do a great job, however if he can get it done at a machine shop for $40.00 they are typically going to cost more to get the job done based on the size of the rear end housing and the amount of those products needed to do the job, hence my suggestion to use the home brewed vinigar mix instead.
