Beckham was speaking to fans on his Facebook page on Wednesday and said he does not have any bad words to say about Ferguson.
"I'm not going to sit here and be negative about a man who gave me the chance to play for my boyhood team. That I'd always dreamt of playing for," he said.
"For me, like I said, he gave me the chance to do that. He believed in me, he believed in the rest of the young lads that came through with us."
According to reports, Beckham has chosen to set up a Major League Soccer franchise in Miami, and he added that he is even thinking about asking Ferguson to take charge of the side.
"Funny thing was, obviously I'm involved in the MLS and I'm involved in bringing my own franchise into the league and actually he was one of the first numbers that I was going to call to be manager, but I'm not so sure anymore. I'm not sure he'd accept," Beckham jokingly said.
"All joking aside, at the end of the day, I wouldn't be negative about Sir Alex Ferguson because he was the man that gave me the chance to live my dream."
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