David, didn't you lock your diff just so you can do donuts? didn't you also disconnect the front CVD so you only have rear wheel drive..You need to let everyone know why you locked your diff or you will just continue to get silly replies. For normal applications locking your center diff is useless, especially if racing..but for what you are using it for you should be fine..Just dont expect the car to handle like it used to..when you get tired of donuts and drifting, take the Putty out of your center diff..you did use some sort of putty like I recommended didn't You? I sure hope you didn't use any type of glue..then you need to buy a new diff