The Kentucky autoworkers, who want to join the United Auto Workers, filed for a union election Tuesday, a key development in the union’s campaign to organize Southern auto-factories and EV battery facilities.

The United Automobile Workers union asked a federal labor regulator to conduct an election at a factory Ford jointly owns with a South Korean battery company.

Workers at a Ford Motor Co. joint-venture battery plant in Kentucky have formally asked the federal government to hold a vote on joining the United Auto Workers, the union said.

Ford is bringing back certain F250, F350, F450, F550, F650, and F750 Super Duty and Medium Truck vehicles equipped with its 6.7-liter Scorpion diesel engine. It seems that these pickup trucks' motors can form dangerous biodiesel deposits on the fuel pump drivetrain roller components.