just a update: its my axle seal leaking. how hard is that to fix?
Step one, read this thread SEVERAL times:
http://www.explorerforum.com/forums/showthread.php?t=214805 When I replaced mine last year I used Gavin's excellent write up.
I thought I was just replacing my brakes all around until I got to the passenger rear and found oil leaking. I found that I could move my axle up and down about 1/8".
I'll admit I just saw $$$ signs when I found the oil leak. After reading Gavin's write up the first time I kind of freaked out, I had never seen the inside of a differential in person before . . . I read it (and others) SEVERAL more times and convinced myself, I (a 57 year old couch potato) could do it.
Here's the axle bearing I used, I replaced both sides at once even though only one side was worn and leaking. It's a one piece unit, not seperate bearing and seal:
https://www.napaonline.com/napa/en/p...559_0074208450
Basic hand tools handled most of the work, the few specialty tools were "rented" from AutoZone's Loan-A-Tool program. Buy them up front and return for 100% refund.
My cross pin bolt was already broken when I opened up the differential (post 185 in Gavin's thread). Buy one before you get started. Also buy this kit:
http://www.fabbriassociates.com/kitinfo.html You might not need it but if you do, it's worth it's weight in gold!
I replaced the c-clips that hold the axles in. One of them was worn and that axle moved in and out about 1/4". I also replaced the o-rings that help hold the c-clips in place, one was missing and the other one crumbled when I looked at it. (I'll try to find the part number and update this)
I read many stories about what sealant works and what doesn't with gear oil. I ended up buying this reusable gasket:
http://www.amazon.com/Lube-Locker-Fo.../dp/B008RAFJ38
I wish I would have replaced the differential cover at the same time but I did at least give the stock one a light sanding and a few coats of rattle can Rust-Oleum Black paint.
I did mine over the period of about a week after getting off work. I was working on a well packed gravel driveway, at least it wasn't raining.
10 months and 12,000 miles later, no leaks, no strange noises and hundreds of $$$ still in my bank account!!!
Good Luck,