Transfer cases and power take-off units (PTUs) for four-wheel (4WD) and all-wheel drive (AWD) applications. Compared with gear drives, HY-VO chain drives offer lower cost, reduced axial load, lower noise, improved efficiency and greater center distance tolerance. Borg Warner's patented random chain technology uses two different tooth shapes in a proprietary pattern to offset noise and can be tuned for each application. Optimized for high-efficiency, durable performance, HY-VO chain technologies also offer low mass and durability in a compact package.