Dale Earnhardt Jr. (left) talks with Tony Eury Jr. during testing at Atlanta Motor Speedway. (Photo Credit: Rusty Jarrett/Getty Images for NASCAR)

Junior is excited about starting a new chapter in his career with HMS. "Everybody's got great attitudes, everybody's got winning attitudes and winning on their mind and it's contagious."

The biggest challenge in making the transition to HMS has nothing to do with racing. "The hard part for me is just like going to a new school, making new friends. It's hard to make friends. It's hard to build relationships."

Atlanta testing concludes on Tuesday.