Another thing that I have found, is that if you dissasemble a carrier, and remove the big pinion bearing, the shim that is there, will allmost allways be close... Thats what I start with.. If you have the old gears from that case.
replicaracer43-
Unfortunately, pulled, gutted, and tossed all the gears, bearings, and shims from the cases. Pulled a couple of 489 cases from the local Pick-n-Pull years ago. Being low and open gear sets, didn't think I would need any of this valuable stuff. Wished I've posted this back in the day. Oh well, live and learn...