[David R.]

My box was dry and worm bearing races pitted, although worm and sector were not worn badly but sector shaft was egg shaped so I replaced sector, (available then) bushings, bearings and worm. I bought worm only but boy was it a job to get worm off shaft and new one on without distorting that hollow shaft! The worm is a VERY tight press fit and I had to use heat to get the old one off and a little bit of careful heat and a homemade press aperatus with hydraulic jack to get the new one on. We were very afraid of bending the hollow shaft so we used a mandrel inside the tube and used a section of pipe outside packed with sand and slowly pressed the new worm on. Looks like you will need a new shaft anyway so I would go with assembled worm and shaft if available. There are lots of used units around but most will likely be in poor shape also.