Posted on 10/31/2025
The constant velocity (CV) axle transfers power from the transmission to the wheels, allowing for smooth and flexible movement during turns and over bumps on the road. To protect it, each CV joint is covered by a rubber boot that keeps grease in and dirt and water out. If either the axle or boot fails, you could find yourself stuck on the side of the road with a car that won’t move. Knowing when to replace a CV axle or boot can save you from bigger problems and unexpected towing bills. Here’s what every driver should understand about this critical part of the vehicle. What the CV Axle and Boot Do Each CV axle contains joints that flex as the wheels move up, down, and side to side. This flexibility allows for smooth power delivery whether you’re going straight or turning. The CV boots protect those joints from dirt, moisture, and debris while keeping the grease sealed inside. Without the boot, the joint would quickly dry out and fail. Because the C ... read more