ARB Differential Breather Kit

ARB 170112 - Differential Breather Kit A crucial part of any 4WD vehicle, the ARB Differential Breather Kit helps regulate air pressure in drivetrain assemblies including differentials, transmission, and transfer case. As these assemblies heat up during use, the air inside expands and creates increased pressure, necessitating a venting system to release it into the atmosphere. Conversely, when the assembly cools down, the air contracts and creates a vacuum.Many drivetrain assemblies are fitted with a breather from the factory. These factory breathers are usually a one-way valve mounted directly to the housing or remotely on a short tube. The shortfall with the factory breathers is that driving through water crossings creates a vacuum caused by the drivetrain assembly being cooled rapidly by the water. This vacuum will tightly close the valve shut causing air to be instantly drawn into the assembly through the seals. Many times the seals are still submerged below water, leading to the w