Parts for your 2010 Subaru Legacy-Driveshafts

2010 Subaru Legacy driveshafts: what they do and how to look after them

Driveshafts are absolutely relevant to the 2010 Subaru Legacy. According to the Subaru Factory Service Manual for the BM/BR platform (2010 model year) and the Subaru Global Parts Catalogue, the AWD Legacy runs two front CV driveshafts (left and right) and a rear propeller shaft linking the transmission to the rear differential. Workshop references such as Haynes/Chilton and dealership service data back this up, listing inspection and replacement procedures for the front drive shafts, prop shaft, centre support bearing and related joints. So, yes — this model is built around driveshafts as key parts of its Symmetrical AWD layout.

On this Legacy, the front CV shafts transmit torque from the transaxle to the front hubs, allowing for steering and suspension travel without drama. The rear propeller shaft sends power aft to the rear diff, giving that planted AWD feel Subaru owners rate. When these bits are healthy, the car feels smooth off the line, quiet at cruise, and sure-footed on wet or corrugated roads.

Servicing-wise, regular checks pay off. Boots on the front CVs should be inspected for splits or grease flinging, once a boot fails, the joint chews out quickly. Any clicking on tight turns, clunks on take-off, or vibration between 60–100 km/h are classic signs to investigate. The propeller shaft’s centre support bearing and joints should be checked for play and roughness, many OE prop shafts use staked U-joints that are not meant to be serviced separately, so replacement of the assembly is common practice if worn.

Good habits help the lot last. Matching tyre sizes and tread depths across all four corners keeps the AWD driveline happy. After any shaft removal, flanges should be marked and refitted to maintain balance, and bolts torqued to factory spec with threadlocker where specified. If rebooting a CV, quality moly grease and proper clamp tension are musts. Some variants use spring pins at the inner joint — always replace pins and any single-use hardware. For torque values and alignment steps, the Subaru service manual is the go-to.

When replacement is due, choosing quality shafts and having them fitted with attention to balance and sealing will restore that smooth, quiet, no-fuss behaviour Legacy owners expect.

Does a 2010 Subaru Legacy have one or multiple driveshafts?

AWD models have three in play: two front CV driveshafts and one rear propeller shaft. Market-specific FWD variants delete the rear prop shaft but still use the two front CV shafts.

How long do the driveshafts usually last?

With intact boots and sensible driving, front CV shafts often run well past 150,000 km. The rear prop shaft and centre bearing can go longer but may develop vibration with age or harsh use. Road grime, torn boots, and mismatched tyres shorten service life.

Is it safe to keep driving with a vibrating prop shaft or clicking CV?

Not ideal. A clicking CV can let go and affect steering drive, while a failing prop shaft can escalate to harsh vibration that risks collateral damage. It’s best to book it in promptly for diagnosis and repair.