There are things you try and do yourself and thers things better left to people that know what there doing. I don't like to pay for things twice and doing it right the fist time is the way I always looked at things. If it were for my personal car or a customers.. What could happen is a locked up rear, or laying up a car in a drive way that now needs to be towed to a shop to fix the mistake.or better yet a noise worse then a drone from flowmasters. The way to learn is to have some that knows how to do it teach you.3 things someone shouldn't fuck with if they are unshore is an engine, a tranny, and a rear. Can he do it... Ya I think so, but there is a lot of stuff I can do to but I just don't.