I took my D44 axle to a shop to have the Ring & Pinion replaced. After they inspected it, they said that whoever did the gear swap last time had used a "spacer". I don't know what that is so I asked what that meant. They said they could do the job with the spacer there but wouldn't warranty the work. I said fine just do it so I can get on with building my truck. I went to get an update today since they said they would be finished yesterday or this morning. Now they are saying that they can't get it to set up correctly. They say it's too loose & I need a new diff housing(I think that's what they said). The guy at the counter said he would have the person call me when he got back. Noone called so I called back & now that person is out to lunch & he will call when he gets back. Now they say the new housing isn't that much($70 or so), but does this sound right? They also told me that I will need to replace almost everything on the axle because it's all worn. I will need all the bearings, ball joints, & all that. But he said I could do that later. For now they are replacing the R&P & the install kit. What do you guys think?