Maybe you guys can help me with this. I'm in the middle of replacing the chassis on my M-03. Regular maintenance I can handle. At the 2012 TCS race in Jackson, NJ I stripped out the ball diff. Another racer there gave me his completely built up M03 gear diff (his M03 was long gone, replaced by an M05, but he still had the diff). Problem is I have no idea how to set up the gear diff. I'm not sore what thicker or thinner oil will do for handling, and I have no idea what's in it now. Any recommendations?

I could also use help with shock oil. Springs are easy, but it's been so long since I built the shocks I forgot what I have in them.