Sir Alex reveals how he came to announce his retirement
Sir Alex talks about changes in management
Sir Alex recalls how a bad surface helped cause a cup exit
In an exclusive in-depth interview with MUTV ahead of this week's release of his autobiography, the former Reds boss spoke about a variety of topics but feels David Moyes will benefit from the full backing of the club as he looks to stamp his own influence at Old Trafford.
"I always remember saying to the board back in David [Gill]'s time that we must always remember the manager is the most important person at the club," Sir Alex explained to MUTV.
"He always will be, whether it's Alex Ferguson, David Moyes or Matt Busby. The most important person in the club is the manager and must always be sacrosanct. In fairness, the club have always stuck by that rigid belief that the manager is the most important person.
"I think the key for David Moyes is not to look to do anything better or less but just to maintain what the club has been for 20-odd years and keep the success going. It's not easy winning a trophy in our league because you could say there are six teams fighting for the league.
"For David, winning a trophy would be a fantastic achievement. No matter what it is - the League Cup, FA Cup, European Cup or Premier League. We've always had priorities obviously and David is aware of that but I hope he achieves it.