Transmission Transfer Case Vent Arb Diff Breather Differential Axle Breather Replace For ARB 170112 Kit For Drivetrain Assemblies Differentials Transmission And Transfer Case Of 4 4 4wd Vehicle Rear Differential Gasket 2000 Jeep Cherokee Front The differential breather Kit is unique in that it uses 8mm tubing (where most other kits use 6mm tubing). ARB Differential Axle Breather Kit - 4Runner Lifestyle 8mm Polyethylene tubing is oil resistant, water resistant and heat resistant,make the installation simple and fast. ARB differential breather kits are intended to replace your factory breathers and contain enough fittings and tubing to connect at least two drivetrain... A differential / axle breather serves the important purpose on a 4WD vehicle of venting the air pressure in drivetrain assemblies such as the differentials, transmission and transfer case. High Level Differential Breather Kit Differential Axle Breather Kit Please note: It is a aftermarket replacement for ARB 170112 Kit.