Walter Smith has appealed to fans to stop singing offensive songs for fear of Rangers suffering "drastic consequences'' as a result.
The Scottish champions are facing disciplinary action from UEFA following allegations of discriminatory chanting by their supporters during last month's Europa League game against PSV Eindhoven.
Smith said: "It's fine when you have a great club, with a great tradition, as Rangers have and people feel that's a part of it.
"But I think when there is a reaction, as there has been over the last few years, against those traditions then the people who do sing them - and I would stress that I don't think it's the majority of Rangers supporters - need to take into account that in a modern era it's maybe not acceptable for them to do so.
"Therefore they need to realise the club are going to suffer quite drastic consequences if they don't stop.
"So I would ask them, considering the problems that our club have, to take that into account and stop singing the songs that are offensive.''