1973 buick centurion. posi rear.
As stated above, check them while replacing the seals. A lot of the times, you can just repack them as long as they're in good condition.
given the fact that the bearings are 35 years old and should have a good amount of mileage, i would. you are going to have the rear end apart for this any way. save your self the time and money for a second tear down. if the bearings were replaced prior to this, hmmm, i would still save face and replace them. it seams like any time you disturb one part to replace another, that first will start to act up.
not necessary. check them for wear and decide then.
