A drive axle is essentially a half axle, so named because it does half of the job, extending from a transaxle or differential to one of the wheels. Its twin on the other side completes the set. Because they're simply shafts, half shafts age well, but the joints that connect them on either end in independent-suspension vehicles are subject to significant wear. The most prudent maintenance for these systems is to maintain the integrity of the constant velocity joint boots, which are rubber sleeves around the CV joints.
How do I know if my drive axle needs replacing?
A clicking noise from the front when turning and vibrations at highway speeds are two signs that one of the drive axles need replacing. Another sign is grease on the inside of the front wheels. The drive axles are connected to the transmission through CV joints covered by boots that contain lubricating grease. If a boot tears, the grease can leak out, and moisture and dirt can come in, damaging the CV joint and possibly the axle. In such cases, many shops recommend replacing the axles in addition to the boots and CV joints.
How often should I replace a drive axle?
Drive axles on front- and all-wheel-drive vehicles usually need to be replaced because another part has failed. The best preventive medicine is to have a mechanic inspect the boots and drive axles at least annually to prevent a small tear from turning into a big bill.
Why do I have to replace my drive axle or half shaft?
When the rubber boots that cover the CV joints tear or split open, lubricating grease can leak out and dirt and moisture can get in. That will eventually damage the CV joint and the axle, and both will need replacing.
How much should I pay?
The cost of repairs can depend on where you are as much as it does on what you need fixed. To get an estimate for your repair, go to our estimator, plug in your car's year, make and model information, add your ZIP code, and choose the repair you need. We'll give you a range for what your repairs should cost in your area.
