Lot's of new electronics on the TRD 4x4. Here's my first, I have a limmited slip button, it works in 2x4 mode, does'nt in 4x4, limmited slip should work ALL the time, what exactly does it do? What exactly does ESP off, do in 2x4. What exactly does A-Trac do in 4x4 low? The book tells me that it increases traction in slippery conditions, daa ok, but what does it really do so I can tailor it to a particular sutuation?