BROOKLYN, Mich. -- Greg Biffle says he's 90 percent sure he will sign an extension with Roush Fenway Racing beyond the end of his contract next season.
But he added that won't happen until he sees an improvement with the performance of his team, which is 19th in points.
"If I am not happy, why should I negotiate?" he said before Friday's practice at Michigan International Speedway. "I need to run better. We've got a couple of weak links. We want to strengthen our team a little better. We need to show up at the race track being competitive off the truck.
"I didn't forget how to drive at Pocono. We were 43rd at Pocono before qualifying. Qualified 42nd and ran 30th. And I am not going to sign a 5-year extension running like that."
Team owner Jack Roush is confident things will turn around.
"There isn't an imminent need for a conversation with Greg about a contract," he said. "We have a contract in place for 2008, and I think he's very comfortable with that, and I am as well.
"The feeding frenzy that goes on in the media regarding contracts for the future is something that we don't want to be a distraction right now. What happens in 2009 isn't nearly as important as the testing we just did at [Milwaukee] yesterday and the other testing we've got in front of us."
Unlike former Roush teammate Kurt Busch, who asked for his release after signing a deal with Penske Racing a year and a half before his Roush deal was complete, Biffle said he will honor his contract in 2008.
"Because I am convinced that we have the ability to make this a championship-caliber car and team," he said. "We have all the tools and resources we need. We have to execute it as far as management side of things.
"We have to have good people. Technology, we have to get better at. We're getting the seven post machine. But we're getting better and better and better."
Biffle's name has come up in several openings, including replacing Dale Earnhardt Jr. in the No. 8 at Dale Earnhardt Inc. next season.
"I'm not trying to figure out a way leave," Biffle said. "I'm trying to figure out a way to win and get in the Chase right now and win the championship. I'm focused on winning five races this season.
"I'm not at the Junior stage yet. The Junior stage is next year for me. Not this year."
David Newton covers NASCAR for ESPN.com. He can be reached at firstname.lastname@example.org.