Next year, heavy-duty GM trucks will lose their Allison badges, even though the transmissions themselves won't change.

The two brands have worked together for decades, but they couldn't reach an agreement to extend their longstanding licensing deal.

The 700R4 transmission from General Motors continues to be a reliable and sought-after automatic gearbox more than 40 years after its introduction. Used in all manner of cars and trucks, the GM Turbo ...