I have a 489 case 3:55 3rd member that I'd like to sell. All parts are brand new and purchased from Doctor Diff about 4 months ago. I am unable to get the correct gear contact pattern, so I gave up and put my 3:23 back in my car. It has new pinion and carrier bearings too.
I have the dial indicator, setup bearings, and a home made tool to adjust the carrier bearing preload and extra shims and new crush sleeve.
There is currently a crush sleeve eliminator installed and you could probably add/remove shims to the pinion and get the correct wear pattern if you know what you are doing (I obviously don't).
I paid around 800 for the parts and already had the carrier. Make me an offer so I can quit looking at it because it pisses me off every time I see it.