The cars people drive keeps getting older with the average age of vehicles on the road hitting 12.1 years this year. That represents a great opportunity for repair shops and auto parts sellers, according to market research firm IHS Markit.  The firm attributed the increase in the average age of light vehicles in operation to the lack of vehicle ...

The differential gears, usually called the “differential” or just “diff,” is part of the drive axle/final drive.