Thanks for the response. The truggy can run 4S or 6S. After running 6S for the first time yesterday, I'm thinking I will just use 4S for the most part. I'll just use the 6S when I have A LOT of room. I did order some stiffer springs. I was hoping that would help some of my traction problems. What about shock fluid? Would going thicker help. I will put the 100,000 in the center differential and see the effect. I'm still trying to get a handle on the whole three differential set up and what effects what. Thanks again.