Modern day rears just don't need repair any more and you will have difficulty finding some one with experience in setting up a rear. Speed shops do it occasionally, but they are expensive. If you can find someone who worked on heavy trucks more than 20 years ago, they will know how. Before synthetic lube, we used to have to rebuild rears every 100,00 miles or once a year. Now rears go over a million miles without being touched. Maintenance manuals walk you through the process, but they assume you have some mechanical experience.
