Drivetrain Inspection Services

CV Axle

Should you notice a clicking noise during sharp turns, it may signal a worn CV axle, meaning constant velocity axle. This component of the drivetrain moves to high working angles under load depending on road and driving conditions. The outer CV joint will most likely be heard when turning sharply and accelerating simultaneously. In contrast, the inner joint will either produce a vibration or clunking noise while accelerating, especially from a stop.

U Joint

There are numerous moving parts to the drivetrain, such as U joints (universal joints), which move to accommodate changing driving conditions. Again, stress and strain wear these components down over time, as does repeatedly driving in extreme weather conditions or terrain. Thus, they require routine inspection and lubrication to prevent this. 

U joints should be carefully inspected whenever any of the following symptoms occur:

• Vibration or harshness at highway speed
• A clicking sound whenever the vehicle is moving
• A clunking sound when changing gears

Lockett’s Auto Care technicians inspect your vehicle’s drivetrain or driveshaft for dents, debris, and excessive movement while lubricating fittings. Since the drivetrain moves up and down as your car, truck, or SUB moves over the road, unequal or incorrect U-joint working angles can cause severe problems.

Drive Pinion Assembly and Ring Gear

Two other components our technicians examine include the drive pinion and ring gear. Two opposed tapered roller bearings support the drive pinion assembly. Its seal is in the housing with the pinion flange and nut to preload and secure the assembly. The ring gear is bolted to the differential case and opposed tapered roller side bearings to support the case. Threaded adjusters are used on the side bearings to set ring gear to drive pinion gear backlash and preload.