The union's president called on more workers to walk out at Ford and General Motors, but cited progress at Stellantis.
Former President Donald Trump, the leading Republican seeking to unseat Biden, is also courting autoworkers with a rally in Detroit.
The decision to hold back on striking more Ford facilities shows the flexibility behind the union's strategy.
TV Shows That Are Delayed Or Canceled Because Of The Hollywood Strikes
The former president argues that Joe Biden's support for the transition to electric vehicles has hurt union autoworkers.
“Those record profits have not been shared fairly, in my view, with those workers," he said.
The targeted walkouts are aimed at throwing the "Big Three" off balance as the union battles for new contracts.
Many observers believe a work stoppage of some kind looks increasingly likely.
The automakers, which are making billions in profits, have dismissed the UAW’s wish list.
The late night host explained what he realized about his work amid the Hollywood actors and writers strikes.