Originally Posted by
RonH
The brake and shifter housings can also get rusted and corroded. Be sure to lube inside the housings with Tri-Flow or something similar.
DO NOT USE WD-40!!!!
I much prefer to use a lined cable housing...I'm not sure you can even get unlined cable housing anymore

A little bearing grease on the cable before it goes in the housing is enough lubrication. Teflon coated cables help too.