GM thanked the plant's approximately 200 employees in a statement.
"We appreciate their commitment and hard work to build the highest quality possible." at Warren Transmission Operations, "GM said.
The company said 60 workers have been transferred to other factories in the United States and 25 workers are retiring.
GM describes the plant as being "unallocated," meaning the plant is not completely shutting down for now. Instead, it's no longer producing anything else once it's done with the current line of transmissions. The future of the plant depends on the ongoing negotiations between GM and the UAW Union.
"As part of GM's modernization plan, the company is reducing its salaried workforce by 1
non-factory workers. The transition will come at the expense of about 8,000 salaried workers, and 6,000 hourly workers will either loose their jobs or be reassigned to other plants. GM previously offered voluntary buyouts for 18,000 salaried workers.