The steel used for these gears are either to soft or to hard. A hard ring gear with a soft pinion gear =no pinion teeth. These gears are cheap becouse the steel used to make them is inferior. Just imagine how cheap they could make them if they didn't warrenty them.
This brings to mind that tommy boy movie with Chris Farley/David Spade don't buy those ketchup popscicles ya crazy eskimo!
