Folks today, after being parked for about an hour after a 25 mile drive, I noticed about a 1.5 to 2 inch puddle of gear oil under the car. Crawling under and taking a look, it appears the Differential front (pinion) seal is leaking. Is there a good DIY somewhere I can use to go about changing the seal? I know all about the special socket needed for the flange nut, and loosening the driveshaft (especially since I just replaced the center driveshaft bearing about 350 miles ago), but once the flange nut is removed, does the flange slide off, or is it pressed on?

Or would it be less hassle (yet more costly) just to swap out the whole damn differential.