Rust is rust... that should be covered...
Saw a couple of brand new Hummers at the Great Yorkshire Show... both of them rusty underneath... total crap build quality as well.
John
It usually states what type under the bonnet, or on the dipstick.. and definitely in the handbook.
Either way, you are looking at type T or T-IV fluid.. if you can use type T, it's much cheaper..
John