The hub nut is a crucial part of what gives you drive in your car. Without it, there is nothing to hold the driveshaft in place and - while the wheel won’t necessarily fall off - you will be running a serious risk of the driveshaft either falling out or snapping off entirely. Adjusting the hub nut can affect the torque, so it is advisable to check your owner’s manual to make sure that you are maintaining the recommended specifications. Since hub nuts can often be difficult to remove and fit, it is also advised that you enlist the help of a mechanic to perform the repair.