During practice for the
Detroit Gasket 200, a Busch Series race at
Michigan International Speedway in August 1992, he died shortly thereafter while in transit to hospital. He was the first of two Allisons to die within the space of eleven months; his brother perished in a helicopter crash at Talladega Superspeedway the following year.
Bobby Labonte and
Richard Lasater were the first to reach the accident scene. It was reported that the driver's seat was "ripped from its moorings" in the accident and Allison was unrestrained in the crash. NASCAR officials disputed that there was significant equipment failure. "The integrity of the car's safety features were there," NASCAR vice president
Les Richter said. "The seat had moved a bit, but it was not flopping around. The car hit the wall almost absolutely flush, and that's one of the worst kinds of accidents." On August 23,
The Atlanta Constitution reported that according to "a driver who tried to assist Allison after the crash and a crew chief in the
Grand National Series who requested anonymity, the cause of the fatal head injury was a broken seat, which prevented the safety harness from working properly and allowed Allison to be pitched into the car's roll cage." In January 1996, Allison's estate filed a lawsuit against NASCAR, Michigan International Speedway, car-owner Barry Owen, helmet and harness manufacturer
Simpson Performance Products, and seat builder Brian Butler. It was alleged that the faulty equipment and poor inspections turned a crash that should have been survivable into a fatal injury. A judge excused NASCAR,
Penske Speedways (Michigan track ownership), and Owen from the lawsuit but Simpson and Butler failed to respond to the lawsuit and were held financially responsible for Allison's death. Allison had three children at the time of his death, Brandon, Tanya, and Leslie. Widow Elisa is currently an author. ==Motorsports career results==