Transfer cases are a particular type of gearbox that allows the driver to change the drive ratio between the front and rear axles. They were initially developed to cope with four-wheel drive vehicles, but now you can find them in many other types of cars too.
They're also known as transfer gears or transfer cases, but they all mean the same thing. There are different types of transfer cases available, which we'll get into later.
How Does A Transfer Case Work?
When you engage 4WD mode in your vehicle, it locks both front wheels together and turns them at about a 3:1 ratio compared to the rear wheels, depending on how many gears you have.
When one wheel spins, three will also spin at roughly the same speed. The result is that all four wheels move in unison as if they were one unit. This helps in handling harsh weather conditions and slippery roads.
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