"I think you always want to go out on a winning note," said Ferguson.
"Hopefully we can do that. I don't know how long I can last now but if my health stays up I don't think another two or three years would harm me."
He also says his wife is keen for him to remain active and has even suggested he becomes a milkman when he steps down as manager.
FERGUSON ON HIS SUCCESSOR
"At this moment in time there are about half a dozen managers doing very well in the Premier League - all the others are fighting for their lives. Is that going to be the same in two or three years' time when I'm ready to quit? Someone may have lost their job."
There has been constant speculation about who will succeed Ferguson, with a string of former players linked with the job at various times.
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