California Smog & Automotive Institute
951.781.0412

Drivetrain

Alt + /

That Clunk Isn’t Normal: Why Your U-Joints Need Lubrication (Lubricate U-Joints)

If you’ve noticed a clunk when shifting from park to drive, accelerating from a stop or letting off on your accelerator, it may be your vehicle warning you about dry or failing U-joints. Those a...
Published on: Jun 21, 2026

Out of Joint (CV Joint and Boot Replacement)

If you have a front-wheel-drive vehicle, it has components called CV joints which enable you to turn your wheels smoothly. The CV stands for “constant velocity.” In essence, it’s a s...
Published on: Jun 01, 2025

Not a Good Vibe (Driveshaft Failure) Has Video

When you feel your vehicle vibrating as you're driving down the road, one cause could be something you may not have ever seen: your driveshaft.  It is underneath the vehicle and most drivers don'...
Published on: Jan 01, 2021