Gerry, according to the GM parts catalogue, the Timken part #'s are: Front pinion - M86649/M86610 Rear pinion - HM89449/HM89410 Diff carrier - LM501314 You should be able to get the axle bearings and pinion seal at NAPA or some such. If you have trouble, let me know and I'll get part numbers for those too.
