The record is now 18-24 since Super Bowl XLVI, and it is trending the wrong way for Tom Coughlin: 8-8, 7-9, 3-7.

The worst fears of Giants ownership seem to be drawing closer.

Their beloved head coach is on the clock, and it isn’t Father Time’s clock.

There is no more season for their Giants, surely out of the playoffs for the third consecutive season.

Only for their beloved head coach, it’s a six-game season that may compel the powers-that-be to reach the agonizing decision that not all champions get to ride off into the sunset on a Big Blue horse on his own terms.

Coughlin’s Giants are trying, but at some point, there are no medals for trying, even for a two-time Super Bowl champion headed to Canton.

There is never any rush by the Giants, disciples of stability and continuity, to push one of their own out the door, and there won’t be here, nor should there be. Coughlin has accomplished too much, meant so much, across 11 years here, and shows no signs of slowing down, even at 68.

But once those treacherous winds of change begin blowing, they often feel like more than a gentle breeze.

The standard is not mediocrity, and how sobering it is that Coughlin must win five of these last six games to finish 8-8.

With a team that has lost its identity and springs one new leak after another, leaving Coughlin with a titanic challenge to steer this football Titanic around the giant iceberg in its path.

John Mara, whose father once compared Coughlin with Lombardi, lives and dies with his Giants, and is pulling his hair out behind the Big Blue walls.

Every coach has to deal with injuries, so in and of itself they are not an excuse. But the organization’s decision to bring in a new offensive coordinator with a new system, and all those free agents to integrate, and the losses at various junctures of Victor Cruz, Jon Beason, Walter Thurmond III, Geoff Schwartz, Prince Amukamara, Rashad Jennings and the belated debut of first-round draft pick Odell Beckham Jr., have all conspired against Coughlin.

Jason Pierre-Paul’s failure to be J.J. Watt East, to wreck games — and to a lesser degree Damontre Moore’s failure to make an impact — has diminished a pass rush that, already affected adversely by the rules changes favoring quarterbacks and receivers, is no longer the essence of Big Blue defense and the scourge of the league.

Rueben Randle has not stepped up as a go-to guy, especially once Cruz went down.

The offensive line has finally been infused with new blood, but isn’t anywhere in the same league as Jerry Jones’ Five Blocks of Granite, and bullies and intimidates no one at the point of attack, which has devalued Eli Manning.

Even Coughlin’s last line of defense — Manning — finally buckled Sunday under the weight of trying to carry this team.

All that said, something is missing. The Coughlin Giants have forgotten how to win.

Understand this: Mara will not be influenced by fans and media. Empty seats are always another matter. But Manning remains a staunch supporter. And Coughlin has not lost the room.

“Coach Coughlin’s the guy,” Jennings told The Post. “He’s somebody that has command over the room. … You could see that. … You could feel that.”

What tells you that everybody respects him?

“The demeanor people have when he speaks … just conversations of guys in the locker room … how much we love to play for him,” Jennings said.

Why do you think that is?

“I can’t speak necessarily for everybody why they play, or enjoy playing for him, but I do,” Jennings said, “just because he’s consistent. You know what you’re gonna get out of him, and you know he’s gonna pull the best out of you.”

Coughlin still lives for gameday. He left his Giants with this message Monday.

“We’re all disappointed, but don’t get discouraged,” Coughlin said. “You gotta come back and do it again, you gotta do it again, and you gotta love Sunday afternoon or Sunday night. You gotta build the week, and then go and have the whole extent of working so hard is to come together with your talent and your skill whatever gametime is Sunday or Monday.”

He has coached 317 games, including playoffs, over his 19-year Hall of Fame NFL head coaching career.

A career that could very well hinge on this six-game season beginning for him Sunday night against the Cowboys.

Coughlin is everything that is right about his sport, and deserves better than any shrill “Tom must go” chorus. Ownership will be rooting for him, hoping against hope that their team shows as much fight as he does every day. Mara and Tisch will make that ultimate call whether it is finally time for a new voice, as they always do, at the end of the season.

This six-game season for Tom Coughlin.