Sorry to hijack, but seems mine is slowly getting that way as well, I see in my driveway, and the bottom of the differential is wet, can you post the steps to change the seal,
Here is a link to pictures of the job start to finish.
You will need a 1 1/4 inch socket to remove the pinion nut. I used an electric impact wrench to get all the bolts/nut off and a autozone front end service puller thing to get the companion flange off.
Be sure to mark everything and measure/count the number of rotations it takes to get the pinion nut off.
Easiest way to remove the seal i found was to take a big flat head/pry bar and pop the seal out. I tried a few different things but that had the best results in the shortest amount of time.
Putting the seal back in I added some goo around the outside to help the new seal seat better, I used the compantion flange and the pinion nut to drive the seal back in evenly before tapping it in the rest of the way with a hammer.
Follow some of the instructions the other guys in the thread suggested and it will be even easier.
I will be changing the u-joints today/tomorrow. The rear joint had pretty limited rotation one axis of the joint.
All my other seals were ok (no leakage) and the bearing in the diff looked good (no metal or anything out of the ordinary).
I will be refilling with 75W90 Synthetic gear oil and a few ounces of friction modifier to make up for what I lost. (i just changed the fluid <1000 miles ago)
Let me know what you guys think.