It's a Chad Knaus few ever get to know. Dale Earnhardt Jr. sits down with the 7time NASCAR Championship Crew Chief in a wideopen interview on the Download.

Knaus' journey to becoming Jimmie Johnson's crew chief started in the grassroots midwest wrenching on his father's Late Model racecars. That short track grind taught many valuable lessons that he took with him on an unlikely journey to the heart of Stock Car Auto Racing, Charlotte, N.C. Knaus speaks of the failures in his first attempts to get into NASCAR, and how it landed him back home, and far away from his dream of becoming a bigtime crew chief.

A bold phone call and an overnight stay in the Hendrick Motorsports parking lot finally opened the door for the journeyman crew member.

Catch the full interview on dirtymomedia.com or any podcasting platform.