I have a 99 s10 zr2 i judt bought. The 4x4 has a mind of its own. Sometimes it works like a dream other times its a demon. It will go in 4 low but wont go into 4 hi, so i tried putting a new transfer case switch on it and noticed there was water and a little oil coming out of vacuum lines anybody know why this is happening and what i can do to fix it. Also i need a diagram of vacuum hoses if anyone has one it would be greatly appreciated. Thank You