As mentioned in the "cruiser v. durango" post, I'm contemplating picking up a lx450. The guy told me it had locking diffs when I asked him, but when pressed, he admited he didnt' know. I got a copy of the invoice sheet, and it has the following listed: *second gear start switch for slippery conditions *fill time four wheel drive whith two speed transfer case *viscous coupling center diff with auto locking for low transfer position. Now I'm not sure what all that means. What is the interpretation?