CV Axle Function

Constant velocity (CV) joints are usually reliable and largely trouble-free.

On cars with front wheel drive, the drive wheels must also be able to turn for steering. The drive axles are equipped at each end with constant velocity (CV) joints which allow power to be continuously delivered to the drive wheels-even when all the connections are not precisely straight. The CV joint is similar to older-type universal joints in function, but it operates much more smoothly at more radical drive axle angles.

The inner CV joints attach to the transaxle drive flanges, while the outer CV joints are equipped with splined stub axles which engage the splines of the wheel hubs and are secured by the large nut. Each joint is packed with a special molybdenum disulfide grease and completely sealed by a rubber boot. Although some inspection of the CV joints and even replacement of the inner joints are possible while the drive axles are installed, complete inspection and thorough lubrication of the joints requires that the drive axles be removed from the car.

A torn or ripped CV boot can destroy the CV joint in a matter of days, especially if the weather is wet. It is a waste of money to replace the CV boot if the CV joint is already damaged.

View of front wheel drive halfshaft assembly using CV joint components on both ends.

CV Axle – Trouble Symptoms

• Grease on inside of tire
• Clicking or popping noise
• Vibration that increases with speed or kicks in at different speeds
• Clunking noise when engaging automatic transmission
• Continuous knock at low speed
• Continuous humming or growling noise
• Clunking noise during acceleration or deceleration
• Shudder while acceleration or deceleration.
• Cyclic vibration

Grease on inside of tire

• Condition – Torn CV Boot
• Solution – Replace CV Axle

Clicking or popping noise

• Condition – Worn outer joint.
• Solution – Replace CV Axle

Vibration that increases with speed or kicks in at different speeds

• Condition – Excessive play in the inner or outer joints or a bent driveshaft
• Solution – Replace CV Axle

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Clunking noise when engaging automatic transmission

• Condition – Worn inner or outer joints.
• Solution – Replace CV Axle

Continuous knock at low speed

• Condition – Indicates a worn CV joint
• Solution – Replace CV Axle

Continuous humming or growling noise

• Condition – Inadequate lubrication on inner or outer joints (check boots for leaks). May also be worn gears or wheel bearings.
• Solution – Inspect CV joint – Replace CV Axle

Clunking noise during acceleration or deceleration

• Condition – Worn inboard joint or differential problem in the transaxle.
• Solution – Replace CV Axle

Shudder while acceleration or deceleration.

• Condition – Worn inner CV joint.
• Solution – Replace CV Axle

Cyclic vibration

• Condition – Worn inner tripod CV joint.
• Solution – Replace CV Axle

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Remanufactured CV Axles

Remanufactured CV Axles have proven to be extremely reliable and very cost effective solution to torn CV Boots and CV Axle failure.

The remanufacturing process is complex, but proven. First, all shafts are meticulously inspected. To ensure vibration-free performance, any shaft that is not straight or that has damaged splines is thrown out.

Next all threads are chased and seal surfaces machined and polished for easier installation and longer seal life. Outer and inner constant velocity joints are remanufactured to ensure quality and performance. All new metal slingers and dust shields are used to keep sealing surfaces clean, along with new ABS Rings for trouble-free anti-lock operation.

Finally, all parts are carefully reassembled using specially formulated, high temperature, extreme pressure moly lubricants. New, premium grade boots and stainless steel boot clamps are then installed in addition to new nuts on specific applications as needed.

At Clutch Mart, we recommend the use of high quality Remanufactured CV Axles. Upon customer request, we will install a brand new CV Axle.

We offer same day service on most CV Axle replacements.

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CV Axles – Warranty

Clutch Mart offers the best CV Axle warranty in the industry. Under normal, non-commercial use, Clutch Mart installed parts are warranted for as long as you own your car.

Yes, a lifetime CV Axle parts warranty!

Replacement clutch parts cost you nothing.

Our normal use (non-commercial) warranty is simple:

Parts – Lifetime warranty

Labor – Two years or twenty thousand miles (whichever comes first)

All warranty work becomes the top shop’s top priority – fix the problem fast.

Simple, fast, expert technicians, and low prices – your Clutch Mart advantage!

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