DETROIT (NEWSnet/AP) —The United Auto Workers union announced on Wednesday a tentative contract agreement with Ford, signaling a potential breakthrough in ending the almost six-week-long strikes against Detroit automakers.

The four-year deal, which still has to be approved by 57,000 union members at the company, could bring a close to the union’s series of strikes at targeted factories run by Ford, General Motors and Jeep maker Stellantis.

The Ford deal could set the pattern for agreements with the other two automakers, although no other agreements were announced.

The progress in the negotiations came after the union this week walked out at three factories that produce highly profitable pickup trucks and SUVs, adding them to the list of plants already on strike in a strategy to intensify pressure on the companies.

On Tuesday, about 5,000 workers at GM’s assembly plant in Arlington, Texas, walked out, halting production of truck-based SUVs that are huge profit makers for the company. A day earlier, the UAW’s president, Shawn Fain, had added 6,800 employees at Stellantis’ Ram pickup plant in Sterling Heights, Michigan.

Two weeks ago the union struck Ford’s largest and most profitable factory, the Kentucky Truck Plant in Louisville, where 8,700 workers make heavy-duty F-Series pickups and two large SUVs.

In all, about 46,000 workers have walked out at factories owned by the three companies in a series of targeted strikes that began Sept. 15.

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