93 is the only one with getrag rebuild info. If cheap though doesnt hurt to have more than one; one in the garage, one in the house, one in the bathroom... I have a chiltons 89-91, 77-88, haynes 77-93, factory service manual 89 and diesel supplement and 93 service manual for getrag info. When I tear into something I will use sometimes all of them. One may cover one section with more detail than another. Bill