Well, From what I have seen from the parts people, the bearing is a press on, so it should
not ride directly on the shaft, so most likely you do NOT have a damaged shaft.
You will have to check for sure about this... I am seeing that it has a GM style "C"
retainer inside the pumpkin, so you may have to open it up and remove the retainer
clip to remove the shaft. If it's that style, I would imagine you will have to press off
the bearing, then change the seal, and repress the bearing, or just get a new one, it
would be worth it to do that if you got it out....
Again, I didn't find credible forums about this replacement specifically, so you should
either get or look at your manual, or keep looking online for the best information....
https://www.youtube.com/watch?v=pHYCCyzE6DI
Here's a video of someone taking axle out of a dodge, NOT the same vehicle
but if you have a removable cover on the pumpkin, then you may have the
type with the C clips, and here's how it's done.... It's not bad, it would
be nice if it were like the really big trucks, you just unbolt the axle from
the outside...... Nothin's easy.... I feel for ya-
.