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Mayo 26, 2018: jefe de la tripulación de Chad Knaus conversaciones con Monster Energy NASCAR Cup Series driver Jimmie Johnson (48) durante la Coca-Cola 600 práctica. Concord, NC Jonathan Huff/CSM Crédito: Cal
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![FILE - In this July 14, 2006, file photo, crew chief Chad Knaus, left, talks with driver Jimmie Johnson during practice for the Lenox Industrial Tools 300 at New Hampshire International Speedway FILE - In this July 14, 2006, file photo, crew chief Chad Knaus, left, talks with driver Jimmie Johnson during practice for the Lenox Industrial Tools 300 at New Hampshire International Speedway](https://c8.alamy.com/compes/2mkhp3t/file-in-this-july-14-2006-file-photo-crew-chief-chad-knaus-left-talks-with-driver-jimmie-johnson-during-practice-for-the-lenox-industrial-tools-300-at-new-hampshire-international-speedway-in-loudon-n-h-once-johnson-was-paired-with-knaus-as-crew-chief-the-duo-took-off-and-won-a-record-tying-seven-championships-as-the-no-48-team-blossomed-into-one-of-the-best-in-nascar-history-but-their-relationship-could-be-bumpy-despite-a-17-year-friendship-and-all-their-success-and-the-strain-of-underperforming-last-year-was-the-final-push-toward-their-split-ap-photo-sandy-macys-file-2mkhp3t.jpg)