ACKSON, MI – Around 525 United Auto Workers members at Eaton Aerospace in Jackson walked off the job Monday morning, beginning a strike prompted by an expired union employee contract.

Automaker Stellantis (NYSE:STLA) faces growing tension with the United Auto Workers union. In the latest development, United Auto Workers union President Shawn Fain said the union plans to hold strike authorization votes against Stellantis (STLA) because the automaker has not followed through on guarantees it made during a labor deal that was

This comes just a day after the UAW filed unfair labor practice charges against Stellantis with the National Labor Relations Board.

Hill’s Ultium plant voted last week to unionize with United Auto Workers. The company, a joint venture from General Motors and LG Energy Solution, approved the union, making the second UAW success in Tennessee this year.

Workers at the GM battery plant in Spring Hill, Tennessee, celebrated a major victory by securing a 35% pay raise after joining forces with the UAW.

Members of United Auto Workers union strike at Eaton aerospace plant in Jackson over retirement plan dispute, contract expired in July.