Why do you have a Leaking CV Axle Shaft Seal in Car

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Why do You have a Leaking CV Axle Shaft Seal in
Car
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The CV axle shaft seal is either a rubber or a
metal seal that is placed at the point of
interaction of your car's CV axle and the
transmission or differential.
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The CV axle shaft seal is what keeps fluid from
leaking out of the transmission or differential
housing as the CV axle rotates when the vehicle
is in motion.
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The differential transfers engine power from your
transmission to the wheels, and lets your wheels
to move and therefore, it requires to be
lubricated along with your axle.
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Even in some vehicles, the axle shaft seal also
helps to keep the axle shaft in proper alignment
with the transmission.
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And when this axle shaft seal becomes bad,
transmission fluid will leak and possibly create
damage to the transmission or different
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Usually, when there is a leaking CV axle shaft
seal in your car, it is the result of the
following reasons.
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Residue Around the Seal
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Most people wont ever notice this or go
searching for it, but one of the first signs that
a CV axle shaft may need to be replaced is
residue around the seal.
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As the seal begins to wear, it may spring a
small leak causing a thin layer of grease or
transmission fluid to cover the area immediately
around the seal.
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The severity of the leak greatly depends on the
amount of residual deposit around the axle seal.
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Puddles of Fluid
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One of the most common and probably most
noticeable signs of a problem with one of the
vehicles axle shaft seals is a puddle of fluid
underneath the car.
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When the axle shaft seal fails, oil or
transmission fluid can leak from the transmission
or differential.
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If you notice these fluids are pooling under
your car, especially after being parked, you
should have your car serviced as soon as possible.
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A transmission or differential with low fluid
levels can quickly become damaged by overheating.
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Popped Axle Shaft
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When the problem becomes severe, you will notice
that the CV axle shaft seal is constantly popping
out.
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In some cars, this seal not only seals the
transmission and axle intersecting surfaces but
also supports the CV axle.
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If the seal becomes damaged in any way, it may
not be able to support the axle correctly making
it prone to popping and loosening.
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At last,
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Depends on the severity of the leak, if there is
significant fluid loss then the components like
the transmission or the differential could
eventually get damaged.
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Therefore, an axle shaft seal that has become
loose must be checked and immediate action must
be taken to get the problem fixed.
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