Parts for your 2010 Subaru Impreza-Universal joints

2010 Subaru Impreza universal joints: what they do and when to service them

Yes, universal joints are relevant to a 2010 Subaru Impreza. Subaru’s own 2010 Impreza Service Manual (Propeller Shaft/Drive Shaft section), the Subaru parts catalogue for Group 37 (Propeller Shaft), and common workshop references such as Mitchell1 and Haynes note that the AWD Impreza uses a two-piece propeller shaft with universal (cardan) joints, while the front and rear wheel shafts use constant velocity (CV) joints. So universal joints are fitted to the propeller shaft that links the transmission to the rear differential.

On this model, those universal joints let the prop shaft transmit torque smoothly while handling changes in angle as the suspension moves. That means less vibration, better driveline alignment, and reliable power delivery to the rear wheels. From the factory, the prop shaft typically has staked, non-greasable universal joints and a centre support bearing, Subaru treats the assembly as non-serviceable, favouring full shaft replacement if the joints wear.

As part of regular servicing, it’s smart to inspect the universal joints every 40,000–60,000 km or any time there’s a driveline complaint. A quick road test and an under-car check on a hoist go a long way. Look and listen for:

• Vibration on take-off or at steady cruise, especially around 60–100 km/h
• Clunk when shifting from reverse to drive, or on throttle lift-off
• Shudder under load, or a chirp/squeak at low speed that changes with road speed
• Red/brown rust dust near the bearing caps, looseness, or slung grease marks

There are no grease nipples on the factory universal joints, so maintenance is all about inspection, correct prop shaft phasing, and good mounting hardware. If there’s play, notchiness, or binding in a joint, the recommended fix per service literature is replacing the propeller shaft assembly. In Australia and New Zealand, many driveline specialists can rebuild these shafts with serviceable, circlip-retained universal joints and then balance the assembly—handy if you prefer a repair over a full replacement.

Tech tips the workshops like: keep the vehicle at standard ride height or ensure driveline angles are within spec after a lift, mismatched tyre rolling diameters can stress the centre diff and driveline, check the centre support bearing rubber for cracking, and always mark the flanges before removal to maintain phasing. Use new self-locking hardware and follow the torque specs from the Subaru manual when refitting.

Note: the wheel half-shafts use CV joints, not universal joints—different parts, different service approach.

Popular questions about 2010 Subaru Impreza universal joints

Does a 2010 Subaru Impreza have universal joints?

Yes. The AWD Impreza uses universal joints on the propeller shaft between the transmission and rear differential. The front and rear half-shafts at the wheels use CV joints instead.

This setup is confirmed in the Subaru 2010 Impreza Service Manual and parts catalogue, which specify a two-piece prop shaft with U-joints and a centre support bearing.

How do you know the prop shaft universal joints are worn?

Common signs include vibration at highway speeds, a clunk when selecting drive or reverse, shudder on acceleration, and a chirping or squeaking noise that follows road speed.

Under the car, look for rust dust around the bearing caps, looseness, or stiffness when rotating the joint by hand. Any play or notchiness means it’s time for repair or replacement.

Can the universal joints be greased or replaced individually?

From the factory, they’re non-greasable and staked in, so Subaru specifies replacing the entire propeller shaft assembly when they wear.

However, many driveline specialists in AU/NZ can rebuild the shaft with replaceable, greasable joints and re-balance it, which can be a cost-effective option.