If your vehicle is exhibiting a clunking sound, it could be due to play in the CV joints. Checking for play in the CV joints is an important part of maintaining your car's health and performance. To check for play in the CV joint, start by jacking up the front or rear of your car depending on which axle you are checking. Next, grab hold of one wheel at 12 o’clock and 6 o'clock and try to move it side-to-side. If there is any movement then this indicates that there may be wear or damage present within the joint itself. It's also a good idea to visually inspect each boot covering the joint for signs of cracking or splitting as this can indicate potential failure points down the line. Finally, if you detect too much movement from either joint then it's best to have them both professionally inspected and repaired before further damage occurs.