The Rs boss is keen to rebuild his squad as the relegated club prepare to win promotion back to the Premier League at the first attempt, with Wayne Bridge his first target
The west London club will ply their trade in the Championship next season after finishing bottom of the Premier League, despite spending upwards of £20 million on the likes of Christopher Samba and Loic Remy in January.
Redknapp has previously expressed a desire to build a squad capable of earning promotion back to the Premier League as soon as possible, and has conceded that he will need to shift some of the big earners on the pay roll.
"If we don't change it, and I don't get the players that I want to bring in, then we have not got a chance," Redknapp told Sky Sports. "You can't have other people have a say at all, I'm a football person and I've got a staff around me of football people.
"We've got to make the decisions, and if we make the right ones we will have a chance. Otherwise, if other people want to make decisions we've got no chance.
"If I don't get that then I wouldn't stick around. I'll speak to Tony Fernandes, they've got to back me with the people I want."
Redknapp has also revealed he is hoping to secure the signature of Manchester City outcast Wayne Bridge, who spent last season on loan at second-tier side Brighton, with his contract at the Etihad Stadium set to expire.
"I'm not asking him to spend money, I'm looking at a couple of free transfers," Redknapp continued. "I'm trying to get Wayne Bridge, I thought he did fantastically well with Brighton, he'd be a good left-back for us.
"He's got great experience, looks in great shape and is a player I want to bring in on a free. I'm hoping that's the first deal I can do. Tony is away, but I'll speak to him today and see if we can get the deal done."