Here's link on replacing them. If you have a NAPA with a machine shop you could remove the rotors get them checked to see if salvageable and need turned and buy new bearings/seals and have them reinstall and pack them with grease so all you would need to do is reinstall.
I actually have the front drive shaft out right now! But yeah, I dont think its engaging. Been meaning to get around to fixing it, but since I have never really had the need its been on the way way way back burner.
please do not take any of the above advice as that of an expert!
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