1989 GMC Van

Drive Train Axles Bearings problem
1989 GMC Van V8 Two Wheel Drive Automatic 340000 miles

I am unable to remove the passenger side rear axle from this van because the pinion shaft won't bulge. After removing the lockdown screw, I hit it with a drift and hammer and an air hammer; nothing. What's holding it? Thanks.
April 25, 2010.

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