Parts for your 1998 Subaru Forester-Driveshafts

1998 Subaru Forester driveshafts

Driveshafts absolutely apply to the 1998 Subaru Forester. Technical references including the Subaru Factory Service Manual for the SF-series Forester (Driveline/Axle and Propeller Shaft sections), Subaru’s parts catalogue for MY98 Forester, and mainstream workshop manuals confirm the model uses a two-piece propeller shaft (to drive the rear differential) as well as constant-velocity (CV) axle shafts at each corner. Whether it’s a 5-speed manual with a viscous centre diff or a 4EAT automatic with a transfer clutch, the Forester remains full-time AWD and depends on these shafts to move torque from the gearbox to the diffs and then out to the wheels.

The propeller shaft—often just called the driveshaft—runs down the middle of the car from the transmission to the rear diff. It’s typically a two-piece tube with a centre support bearing and universal joints, designed to handle suspension movement and keep the rear wheels fed with power. At each wheel, CV driveshafts (half-shafts) use CV joints to maintain a smooth transfer of torque while the suspension travels and, up front, while steering. Together, these components are core to Subaru’s Symmetrical AWD character: balanced, grippy, and dependable on Aussie and Kiwi roads.

There’s no fixed replacement interval for shafts, instead, they’re inspected as part of routine servicing. In Australia and New Zealand, heat, gravel, mud, and salt air can chew out rubber boots and accelerate wear, so checking them at every service (or at least every 10,000–15,000 km) is smart. Look for split CV boots, flung grease, vibration on acceleration, clunks on take-off, or a rhythmic shudder at highway speeds—classic signs of worn CV joints, a tired centre bearing, or a failing universal joint. Many Subaru prop shafts have staked or non-serviceable U-joints, so a complete shaft replacement or specialist rebuild may be the practical route. Keep the propeller shaft phasing/alignment marks matched on refit, replace self-locking nuts and cotter pins, and torque everything to the workshop spec. After front axle work, a wheel alignment check is a safe bet. If beach driving’s on the cards, a fresh-water underbody rinse helps the boots and bearings last longer.

• Common symptoms: clicking on turns, grease spray, clunks, or speed-related vibration.
• Good practice: inspect boots and seals routinely, replace damaged boots early to save the joint.
• On prop shafts: check the centre bearing and U-joints, maintain correct shaft balance and phasing.

Is a driveshaft the same as a CV axle on a 1998 Forester?

They’re related but not the same. The propeller shaft (often called the driveshaft) runs down the centre of the vehicle to drive the rear differential. CV axles (half-shafts) run from the differentials to each wheel. The 1998 Forester has both: one prop shaft and four CV axles.

How long do the 1998 Forester’s driveshafts and CV axles typically last?

With tidy servicing, many see 150,000–300,000 km or more. Longevity depends on boot condition, road grime, and driving style. Split CV boots are the usual culprit—catch them early and a boot swap can save the joint. Vibration or droning at speed can point to a worn centre bearing or U-joint on the prop shaft.

Can the centre support bearing or U-joints be replaced separately?

Often yes, but it depends on the specific shaft. Some Subaru prop shafts use staked-in U-joints and a pressed-on centre bearing, which require specialist tools and rebalancing. Many owners opt for a quality rebuilt or new complete shaft for reliability and time savings.