[fastlane]

I always use a new crush sleeve. Sounds like you will need to pull it apart, install a new crush sleeve and pinion seal. The carrier needs to be out of the rear end to properly measure the bearing preload. The preload needs to be 8-16 in. lbs. for used bearings and 22-28 in. lbs. for new bearings. Crushing the sleeve is no easy task either. An impact will get things going but you will need a flange holder tool and some hefty breaker bars to completely crush it. Work slow with the install as once it starts to crush, the preload jumps quickly. You don't want to put too much preload and then back the flange nut off as you will just have to start over with a new sleeve.

Also, did you get a good pattern on the ring gear when installing the new gears? I always hold the ring gear tight when testing the pattern. If you didn't get all that done right, you maybe chewing up the bearings or gear faces. The gear oil shouldn't be discolored after such a short time unless you are chewing something up.