Lady Butterfly, a 1974 Kenworth conventional, was owned by John Mann, of East Canton, Ohio, when the tractor was Overdrive’s Tractor of the Month in September 1980. See more trucks from past issues at www.overdriveretro.com.
Affected tractors are equipped with an automated Eaton UltraShift Plus or Eaton Advantage Transmission with right hand stalk shifter. In the affected trucks, the display on the instrument panel can indicate “N” when the shifter is set into “D” or “R,” causing the truck not to move.
The new “health-based requirements” will need to be met before a driver is allowed to register his or her truck through the Department of Motor Vehicles, CARB says. For older vehicles, CARB says they must be either replaced with a 2011 or newer vehicle or repowered with a 2010 or newer engine.