Again another video of Ryan this time showing us how he rebuilds his diffs using PT RC Racing diff oil, I will take the credit on the tip about using 100cst shock oil to flush the diff. The question of "how you clean your diffs" shows up in the forums from time time and a lot of people have some really good ideas.
The main purpose of using 100 shock oils is not only that it all comes out nice and clean but also that it keeps you from contaminating your diff with other solvents and cleaners which may not all come out and contaminates your fresh oil.
http://lutzinator.com/?page_id=80
http://www.youtube.com/watch?v=n0B46...layer_embedded