"It's hard to keep your head up when things are not going well, and you go to places where you know you can get a pole and run up front and get top-fives, and instead you are running 30th and are the slowest car on the track," Montoya said. "It's hard because I know it's not me."
There's been marked improvement this year, and Montoya contended for wins at both Richmond and Dover. He had the race at Richmond in the bag until a late caution snatched his first NASCAR win on an oval out from under him. He was the leader late at Dover until Tony Stewart ran him down and passed him for the victory.
His wife believes those near-misses have only pushed Montoya harder.
"Everyone was talking about how Michael Schumacher forgot how to drive. He didn't forget how to drive and Juan didn't forget how to drive," Connie Montoya said. "NASCAR is so difficult because all the teams are so close, but so apart, and Juan knew from the beginning that Ganassi wasn't the fastest team. He was ready for that challenge to build up that team, especially because it was Chip and he wants to be with Chip.
"But he's just so frustrated they haven't been able to get their first win on an oval," she added. "Not winning is just the worst part for him. He races because he wants to win, like every driver, and he's so committed. I really think he's much more into it now, that he is up to the challenge. He really, really wants to prove it to himself that he has it what it takes to win in NASCAR."
He demonstrated his commitment by shaking up his routine and Montoya settled on mountain biking as his hobby of choice and has become absolutely devoted to his rides.
His turnaround has wowed those closest to him.
"This is the hardest I've worked, even in Formula One or IndyCar," Montoya said. "Connie says "I can't tell you to do anything else because you can't do anything more."
All he needs to do now is win.
Montoya should have crossed the pesky oval thing off his list years ago, here at the Brickyard. He's had two great chances and both slipped away in the waning laps.
Montoya led 116 laps in 2009 until a speeding penalty on his final pit stop cost him the win. He was also leading in 2010 with 20 laps to go before a late caution sent him to pit road, where he got four tires while everyone else took two. Stuck deep in traffic with little time to make up the ground, Montoya crashed and finished 32nd.
He insisted neither race haunts him.
"I never felt I was speeding," he said. "I felt I did the same speed as all the other stops. Maybe they (NASCAR) looked the other way?"
Montoya goes into Sunday wanting that win on an oval, wanting a NASCAR win at Indy to go with his 500 victory, and wanting to prove this series is the right place for him. No matter what happens the rest of the year, or what the future holds with Ganassi, he wants to stay in a stock car.
"The whole NASCAR thing is fun. The racing is good. Even when you are having bad years, there are weeks you can make something out of nothing and that makes it good," he said. "In Formula One, you look at Williams, they struggle every week and they'll keep struggling until the end of the year. You are not going to fix the problem, they'd love to think they can, and they'll try to fix it, but when you start that far behind, unless you find something radical, you are not going to make up any ground.
"Here, you have cars some weeks that can win races and some weeks finish 30th. I want to win races."