The National Master Automobile Transporters Agreement expires May 31, and contract negotiations have been under way since February. Bargaining over key changes was expected to begin this week in Washington, DC.
The union feels that employers are unfairly demanding pay cuts and other concessions, despite record profits as a strong U.S. economy continues to fuel car sales.
"Management is demanding that these hard-working men and women receive less for doing one of the most difficult jobs in the transportation industry," said Teamsters President James Hoffa. "As profits continue to soar, the rank-and-file workers are viewed as a mere commodity by the big-dollar bosses."
Teamster drivers deliver about 95% of new vehicles and work under a contract covering 17 companies.