* Age and Wear: The most significant factor is simply age and accumulated mileage. Rubber components within the U-joints (the bushings) dry out, crack, and lose their ability to absorb shock and vibration. The bearings themselves wear down from constant rotation and stress. This is exacerbated by harsh driving conditions (frequent off-road use, towing, etc.).
* Corrosion: Rust and corrosion weaken the metal components of both the carrier bearings and U-joints. Road salt, moisture, and general environmental exposure contribute significantly to this.
* Lack of Lubrication: U-joints require lubrication to function properly. Insufficient or degraded grease leads to increased friction, heat generation, and premature wear. If the grease zerks (if equipped) aren't regularly lubricated, this is a major contributor.
* Misalignment: If the driveshaft is misaligned (due to worn suspension components, a collision, or improper installation after repairs), this puts excessive stress on the U-joints and carrier bearing. This uneven load distribution accelerates wear.
* Manufacturing Defects (rare but possible): Though less common, some vehicles might have had manufacturing defects in the driveshaft components themselves, leading to premature failure.
* Driving Style: Aggressive driving, frequent hard acceleration and braking, and off-road use put significantly more strain on the driveshaft components, leading to faster wear and tear.
In summary, the failure of driveshaft carrier bearings and U-joints in a 2000 Honda CR-V is usually a result of the cumulative effect of age, wear, environmental factors, and potentially poor maintenance. Regular inspection and lubrication are crucial for extending their lifespan.
