I know most folks here know how to work on their rig but since there are also new guys getting into FJ Cruisers I thought this might help.

Doing your own simple maintenance is a good way to learn about your rig. It helps you save money and better understand your rig if something goes wrong in the field and you need to figure out a fix. Here is a step by step how to, write-up and video, on changing the gear oil in your FJC's transfer case

Hope it helps