Parts for your 2008 Mazda 6-Universal joints

2008 Mazda 6 universal joints — are they actually used?

Short answer: on Australian and New Zealand–delivered 2008 Mazda 6 (GH series) models, universal joints are not used in the driveline. These cars are front‑wheel drive, so they use constant velocity (CV) joints on the front drive shafts rather than prop‑shaft universal joints. A small universal joint does exist in the steering intermediate shaft, but that’s a steering component, not part of the drivetrain people usually mean when they ask about “universal joints”.

Why they’re not used on this car:

• Front‑wheel drive layout: The transverse engine drives the front wheels via half‑shafts with CV joints, there’s no rear propeller shaft that would need universal joints.
• Steering angle demands: CV joints maintain constant rotational speed at large angles, which is essential for a FWD car that has to steer and drive the front wheels. Traditional universal joints introduce speed fluctuation at angle, causing vibration and wear.
• Packaging and refinement: CV joints and short half‑shafts suit the compact front subframe and deliver smoother NVH behaviour than U‑joints in this application.

What owners should actually service: focus on the front CV joints and boots. Inspect the rubber boots every service for splits, grease sling, or perishing. Clicking on full lock, shudder under load, or grease flung around the inner guards are classic signs a CV joint or boot needs attention. Prompt boot replacement can save the joint, if the joint’s noisy, replacement is usually the go.

Note on variants: Some overseas Mazda Atenza/Mazda 6 models were offered with all‑wheel drive, which use a propeller shaft with universal joints. Those weren’t sold new in AU/NZ in 2008, if you’ve got a grey import AWD wagon or sedan, the driveline will be different and will include U‑joints.

Technical references supporting the above:

• Mazda6 (GH) Workshop Manual, Front Drive Shaft section — specifies outer/inner CV joints for the front axle.
• Mazda Australia 2008 Mazda 6 specifications/brochure — drivetrain listed as front‑wheel drive.
• Mazda Electronic Parts Catalogue (GH) — AU/NZ listings show front drive shafts with CV joints, no propeller shaft/U‑joints for local models, steering intermediate shaft includes a small universal joint.

Popular questions about 2008 Mazda 6 universal joints

Does a 2008 Mazda 6 have universal joints that need servicing?

Not in the driveline for AU/NZ models. They use CV joints up front. There is a small U‑joint in the steering shaft, but it’s rarely a routine service item unless there’s stiffness, notchy steering, or visible corrosion.

What should be checked instead of universal joints on a 2008 Mazda 6?

Check the CV boots and joints. Look for torn boots, grease leaks, and listen for clicking when turning. If a boot is split, replace it and re‑grease promptly. If the joint clicks or grinds, a replacement shaft or joint is usually required.

Could a 2008 Mazda 6 ever have U‑joints in the driveline?

Yes, but only on certain overseas AWD variants (often branded Atenza) that weren’t sold new in AU/NZ. An AWD car will have a rear diff and a prop shaft with U‑joints. If your car is a local FWD model, it won’t have them.