What does an axle vent do?

As the axle increases in temperature, the air pressure inside the axle likewise increases. To accommodate the increase in air pressure resulting from this heat, manufacturers add a vent tube to the top of the axle as means of releasing this pressurized air to the atmosphere.

What problem may be caused if the rear axle breather is blocked?

The breather valve on top of the axle, where fitted, can also become blocked. This causes oil and air to build up inside, which may force oil out of leak-prone places. Overfilling the axle with oil can also raise the pressure enough to cause leaks.

Why are automotive axle housings vented?

All gearboxes in your car must be vented to the atmosphere. This includes transmissions, transfer cases, and axles. The primary function of the vent system is to make certain that the axle housing is never exposed to vacuum or pressurization.

Do I need a differential breather?

Why are Diff Breathers important? Extended diff breathers are extremely important insurance for your 4WD if you drive through water. In essence, when you go through a puddle that is near or above diff height, you are dunking a hot differential into cold water.

What is a axle vent tube?

The Axle Vent Bladder recirculates oil back to your axle and helps to avoid the pressurization that can damage seals. The Dana Spicer Axle Vent Bladder protects your axle from water and mud off-road and helps you avoid costly repairs to internal axle components caused by contaminants entering the axle.

What happens if diff breather is blocked?

When your differential breather becomes clogged from dirt it prevents the gasses inside the diff from escaping and builds up pressure from the heat that is generated.

What holds rear end in place?

So, what holds a car’s rear axle in its place? In any case, rear axles are held in place by ball bearings.

Can diff breathers get water?

In some cases, breathers have a one-way valve that closes when the pressure flips, and in this case that water can be sucked in through your axle or pinion seals.

What does a transmission vent tube do?

This hose is a vent hose for the transmission and would not be connected to anything. The vent is used by the transmission so it will not build up internal pressure and push oil out of any seals.