Hmmmmmm, I wonder what they are doing different than everyone else that isn't having axel problems!

From jayski.com

Hendrick concerned about axle problem: There is some concern at Hendrick Motorsports that the broken axle that left #88-Dale Earnhardt Jr. with a 32nd-place finish on Sunday at Auto Club Speedway could be a more widespread problem. Earnhardt's crew chief, Lance McGrew, said the axle of race winner Jimmie Johnson was about six laps from breaking and that issues were discovered on other HMS cars during Saturday's final practice. "Oh, absolutely," McGrew told ESPN.com on Tuesday. "I'm sweating this weekend along with Atlanta, which is historically really bad on axles. To say there's not a stir about it would be an understatement." McGrew said so far no explanation has been found for the extreme wear. He said the problem first surfaced during Saturday's final practice when the left rear axle on Mark Martin's car, which shares a shop with the Earnhardts, looked "really bad." He said all four HMS teams replaced the axles before the race. "Ours wore out and [Johnson] barely finished the race," McGrew said. "There's no smoking gun, which is aggravating for us. But we'll get to the bottom of it."(ESPN.com)(2-23-2010)

Didn't JJ have an issue at Daytona also? I believe he went to the garage for some time and then came back out.