The drivetrain is the system that connects the wheels of a vehicle to the engine, with critical pieces such as the transmission, driveshaft, differential, and axle. For those wishing to enhance the driving capabilities of their semi truck, consider high-quality U-joints, seals, and camshafts as worthy investments. The Peterbilt 388 frame and chassis components work in conjunction with the semi-truck’s performance parts to support the drivetrain and, in turn, improve its efficiency. By adding some aftermarket exhaust components, it is possible to improve the fuel economy and emissions of your rig. For the Peterbilt 388, issues can arise if those exhaust parts are not installed, therefore maintenance dollars should be spent replacing worn drivetrain parts. This investment pays off in the long term for the truck owner-operator’s business.