pattycakes
New member
Thats from ARB , Not Toyota ! they're telling you that to cover themselves because their systems are known to leak and pressurize the housing. I'm very familiar with ARB and there shortfalls. In regards to the factory breather without the ARB it is completely safe and absolutely unnecessary to modify and air is not drawn through the axle seals in a stock type application period . Like many have said the factory style breather has been a Toyota trademark for 50+ years and Toyota has the best reputation because it works perfect!
That's why we buy toyota in the first place.
I respectfully disagree , if you take one apart you will see the very light weight spring and once dirt/dust gets stuck in there they are so weak they will not operate anymore , when an axle heats up it will release air , when it is cooled quickly it will want to suck in air (ie cold water river crossing etc..) this valve will not let air pressure in ( if still working correctly witch is rare unless bran new )
Therefore water may be pulled in through the pinion or axle ends .
IMO the best thing to do is extend line and add a filter that allows pressures to move in both directions.
it is the first mod I do to all my new Toyotas I buy.