I've heard so mant stories over the years about personality conflicts. Either the driver or the owner or both are buttholes. Clashes over set ups might outdo that. Many car owners refuse to set up the car the way the driver wants. You hear this one a lot. Then, it can be something totally off the wall. One year at the Knoxville Nationals, Sammy Swindell was locked into a great starting position in the A main. He quit the team because the owner wanted his girlfriend at the time to make him a balogna sandwich.