Well that's a good question, I'm just finishing a complete rebuild on a very neglected front axle of a 226D that I recently purchased. I found on mine that the spindle shaft is some very hard material, and as a result it enlongated the hole in the bottom housing. I took mine to a machine shop and had them enlarge the hole and put in a bushing. Make sure that they put in a very thin bushing, as the main trustwasher that caries half the load on the front end rides on this part of the housing and you want to leave enough material there for it to rest on. If you get a chance to take it all apart go ahead it is a pretty interesting set up. there are lots of parts and pieces in there, along with a dozen shims, complicated set up, but when you get it all together just right(after a few tries) it works beatifully. maximum play of shaft in housing no more then 0.02 MM or 0.008 Inch per YM manual .