Picture # 6 this is the inner wheel bearing seal. They come in the kit. You want to clean, and pack your wheel bearings while you have it torn down.



This is the axle seal, it is the one that is leaking. There is one per side.. You do not have to pull the third member to get to it. Just a complete teardown of the knuckles.



Besides the pages that Roger gave you here is a copy of the Factory Service Manual that shows how to set-up the front axle.

http://www.lukemiller.org/toys/1985_toyota_4wd_front_axle_FSM.pdf


Here are places that you can purchase the complete knuckle rebuilding kit:

All-Pro http://www.allprooffroad.com/

Marlin http://www.marlincrawler.com/

FROR http://www.frontrangeoffroadfab.com/nfoscomm/catalog/

Trail-Mart http://www.trail-gear.com/

Sky http://www.sky-manufacturing.com/


You can also use a 2 1/8 socket instead of the 54mm.


I do not know how mechanical you are but I suggest that you locate someone that is willing to help you out doing this the first time. It looks simple but it can be deceiving if you have never done it before.