Found a used Ford/NH 5640S (marked Powerstar SLE) and wondered how it differs from the 5640? I found the 5640 data on tractordata.com which didnt mention anything about an 'S' mdl.
Hey, thanx a million for answering this!!! I was looking at a used SLE on the web and couldnt figure out from other sources what the various 'flavors' were.