DETROIT (AP) — Union leaders from Fiat Chrysler factories are sending a new four-year contract to a membership vote.

The 47,000 members of the United Auto Workers union at the company will vote on the deal starting Friday.

Local leaders assembled on Wednesday in Detroit to go over the pact, which includes a $9,000 bonus per worker upon ratification. The company also has promised $4.5 billion worth of new investments in U.S. factories.

The union reached agreement with Fiat Chrysler last weekend. The new contract also offers a mix of lump sums and pay raises for longtime workers, full top wages for new hires within four years and a path for temporary employees to become full-time after three years of work.

The Fiat Chrysler contract also adds 12.5% to the union workers' profit-sharing formula. The UAW says the deal created more than 7,900 jobs, including a $4.5 billion investment previously announced at two factories in Detroit.

Fiat Chrysler is the last of the Detroit automakers to settle with the union. Workers at General Motors ratified their contract Oct. 31, ending a 40-day strike that paralyzed GM's U.S. factories. Ford workers followed by approving a contract in November.