Hi! Someone was asking for pics of rear diff being filled with oil, i was doing mine today so took a few pics, nothing outrageous to report, but may help someone who hasn't done it before know what to expect...
Here is the rear diff, removed from vehicle:
Undo the four screws and gently remove big cog from diff casing:
Then it's time to clean. I let my drain over night, and then just rinsed with water and rubbed off any residue with a cloth.
Then it's time to re-assemble, and fill with diff fluid. The manual says fill half way, so that cogs are half-covered in fluid. I did mine just over half way in case of light spillage / leakage:
Then put it back together and have lots of fun. I was recommended to try 50k front and 30k rear, so that is what i am doing, but haven't finished putting truck back together yet, so can't comment on the difference it will make. I certainly prefer the idea of having diff fluid in the rear diff as opposed to 'grease'.
Hope that helps.