CV (constant-velocity) joints transfer power from the transmission to your wheels while accommodating steering and suspension movement. When they fail, you’ll hear a telltale “click-click” at each turn—like a cranky woodpecker pecking at your wheel wells.
CV Joint Basics
A CV joint is a flexible coupling that maintains constant rotational speed through steering angles. Outer CV joints handle high articulation for turning; inner joints manage axle length changes as the suspension moves.
Alarm-Bell Symptoms
- Clicking or Popping Under Turns: A worn outer CV joint clicks unmistakably when the steering angle is high, especially in reverse maneuvers.
- Vibration During Acceleration: A bad inner joint may shake the car under load or at highway speeds.
- Grease Leaks: Torn CV boots let grease escape and dirt in, accelerating joint wear.
Diagnosis & Quick Test
- Visual Inspection: Look for boot tears, grease splatter, or rust around CV joint areas during routine service.
- Parking-Lot Test: In a safe, open space, turn sharply and slowly in both directions; if you hear pronounced clicking, the outer joint is toast.
Replacement Recommendations
Replace both the CV joint and its axle shaft as a unit when failure is confirmed. Quality aftermarket axles from reputable brands (Cardone, GKN) balance durability and cost. Plan on 100,000–150,000 miles of service life for a new assembly.
Maintenance Humor
“Grease is the CV joint’s best friend—and dirt is its worst enemy.” Keep boots intact and lubricated, and your joints will purr instead of click. If you spot a boot split, swap it—or the whole axle—before the clicks turn into a clatter.
