Powertrains

Cummins Inc. will buy Meritor for $3.7 billion in a deal that combines traditional and new power components for commercial trucks.

BorgWarner sales and income declined in the second quarter but revised downward guidance for the rest of the year hammered shares.

Eaton, maker of electrical systems and powertrain components posted record revenue in the first quarter.

Meritor has made a strategic investment in TransPower, hoping to tap into the company’s full electric trucking solutions and integrated drive systems along with energy-storage subsystems.