What inner shaft? I'm replacing the two front axles assemblies...I'm willing to try and do it myself as long as the job is as simple as David (Gizmo42) says...Nothing wrong with the existing shafts except that the boots are torned on both sides. I'm planning to keep them as a spare.
I'm not very mechanically inclined and don't have the tools to do this (except jacks and some basic tools). I asked a couple of other shops today and they quoted in the $600. They say they cannot warranty the work without going by the shop manual instructions.