Quote:
Originally posted by mattski
Someone recommended to me spraying the boots with WD40 to extend their life.
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Uh...the synthetic rubber that the boot is made of is actually a petroleum product and spraying it with anything petroleum based will encourage its premature disintegration. If you feel the dire need to spray it with anything (and I don't recommend it because the moist surface will just attract and hold dirt that will act as an abrasive) use a silicone spray.
CV joints can wear over time, just like any other lubricated wear item. Normally the wear will occur in the outer joint and be noticeable as a clicking while accelerating around a corner. This is usually commonly heard after a boot is torn open. However the inner joint can also cause a problem, noticed as a vibration under acceleration, just as a bad u-joint would in a rear-wheel drive car. Rear shafts rarely go bad as they don't have to turn side-to-side as the front joints do and they are also better protected from debris damage, as compared to the front joints.