Upper Windscreen Rubber & Xfer Case Fluid

[740ilDuke]

A) What type of fluid goes in my transfer case? Regular tranny fluid? Ive done the filter and fluid on the transmission, but want to drain the transfer case to give it new blood as well. I know that it being a 2001 I dont have to worry about adaptive values. 2001 4.4

B) The thin strip of rubber on the roof/windscreen line is shot. I actually took the water hose and blew most of it off. Underneath is just metal. Im getting zero wind noise, but Im sure it will rust if I dont paint it etc. Is this replaceable or only coming with a new windscreen? Oddly, the glass is original and perfect with 179,800 miles.

Thanks for the info & help!