Clicking noises from the rear
Clicking noises increase with speed
Repack CV joint and replace rubber boot
Replace entire rear axle halfshaft
Brake cleaner, spray can - $5
Automotive grease, can - $10
Replacement CV boot (Mazda) - $20
Replacement rear axle shaft - $300
Prices are in U.S. dollars.
The CV joints, including the CV boots, are pretty maintenance free. They
are not as notorious as front-wheel drive CV joints - front-wheel drive cars put
steering, as well as driving loads, through their CV joints which causes higher
wear and tear.
Check the rubber CV boots for tears or any signs of grease leaking. If you
find sings of damage or leaks, replace immediately. If dirt and grime gets
into the CV joint, it will damage the bearins. If the boot is just damaged
or leaking and the internals are all good, you can replace the rubber boot and
repack the CV joint with the grease.
The obvious sign of a failing CV joint is clicking noises from the rear of the
vehicle that get faster as you speed up. Usually, this means you need to
replace the entire CV joint or half shaft.
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