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CONCORD, N.C. -- Chad Knaus sat down with Dale Earnhardt Jr. on the popular "Dale Jr. Download" podcast Tuesday to give an update on his final race week as the No. 24 crew chief.

Knaus and Earnhardt traded hilarious stories from the their times on the track as competitors and teammates, and Knaus talked about his early days before reaching championship crew chief status.

He also revealed he joined Twitter by tweeting his first photo with the podcast crew.

To listen to the podcast, click here. The episode also will re-air on Wednesday at 5 p.m. ET on NBCSN.