A transfer case is a part of your car's drivetrain, and it's responsible for sending power from the engine to the front and rear axles. It also allows you to switch between different drive modes while driving around Mahwah, NJ.
It is connected to both axles via a driveshaft, which helps transfer power from the transmission to each axle. It can be connected directly to the transmission if you have an automatic transmission, or indirectly if you have a manual transmission. The motor in your vehicle can be connected directly to one axle or split between two axles through an additional gearbox, in which case there would be two separate driveshafts.
The transfer case has four parts; input shafts and output shafts, one for each axle, as well as a chain or gearset that connects them together. When you select a particular gear ratio, it determines which input shaft will receive more power than others and which output shaft receives less power than others.