Parts for your 2018 Subaru Forester-Centre bearing

Centre Bearing on the 2018 Subaru Forester: Is It Used and What You Should Know

When it comes to the 2018 Subaru Forester and the role of a centre bearing, a quick look at its technical setup will reveal that this vehicle does not use a centre bearing in its drivetrain configuration. The Subaru Forester, especially in its 2018 iteration, primarily features a symmetrical all-wheel-drive system paired with a boxer engine and an updated CVT transmission. These components and layout significantly reduce the need for a traditional centre bearing found in other AWD or 4WD vehicles. So what does this all mean? Well, simply put, the 2018 Forester's design eliminates the need for a centre bearing because of how its drive shafts and power distribution system are engineered.

The concept of a centre bearing generally comes into play in vehicles that use a two-piece driveshaft system where a long driveshaft is split into sections. The centre bearing supports the driveshaft at the midpoint, holding it securely and allowing it to spin freely while absorbing vibrations and ensuring smooth rotation. This bearing is crucial in vehicles that have a longer driveshaft running from the transmission to the rear axle, like many traditional rear-wheel drive or part-time 4WD setups. However, the Forester's drivetrain layout is quite different and much more compact.

The 2018 Subaru Forester uses a full-time symmetrical all-wheel-drive system. Instead of one long driveshaft, it uses shorter drive shafts delivering power from the transmission to each wheel independently. This reduces the complexity and length of driveline components. Because the driveshafts involved are shorter and more direct, the design does not require a bearing to support a central point on the driveshaft. As a result, no centre bearing is fitted or needed at any point in the Forester's drivetrain.

Additionally, Subaru's use of the horizontally opposed boxer engine paired with a continuously variable transmission (CVT) means there is less torque transfer through a traditional driveshaft setup, further lowering the need for additional supports like centre bearings. The stability and integrity of the drivetrain are maintained through well-engineered CV joints, universal joints, and sealed drive shafts that transfer power efficiently without the need for centre bearing support.

Since the 2018 Subaru Forester does not have a centre bearing, there are no maintenance or replacement concerns for this specific part with this vehicle. This means owners can focus their maintenance efforts on other critical components, such as the CV joints, transmission fluid, differential fluids, and the drive shafts themselves. These parts do require occasional servicing and inspection to ensure the AWD system functions smoothly, especially if the vehicle is regularly driven on rough terrain or in tough conditions.

For those curious about what you would look for in vehicles that do have a centre bearing, here's a quick rundown. Typically, if a centre bearing were present, you might encounter symptoms like excessive vibration from underneath the vehicle, abnormal noises coming from the driveline area, or clunking sounds during acceleration or deceleration. In those cases, the centre bearing may wear out, become damaged, or the rubber mount deteriorates over time from engine torque and rough use. Replacing or servicing the centre bearing would involve removing the driveshaft, replacing the bearing assembly, and ensuring all related components are checked for wear to avoid further damage.

Although there isn't a centre bearing to worry about on the 2018 Forester, it's still important to be aware of the general maintenance practices that keep its drivetrain running smoothly. Regularly checking the state of the CV joints, ensuring the CV boots are intact without cracks or leaks, and maintaining the appropriate fluid levels in the transmission and differentials will help the Forester's AWD system stay in top shape. These steps protect the drive shafts and other drivetrain components from premature wear and potential failure, which can be costly to repair.

In short, the 2018 Subaru Forester's clever design removes the need for a centre bearing. This simplifies the drivetrain, reduces potential points of failure, and enhances reliability. Owners can enjoy peace of mind knowing that some of the common driveline service parts seen on other AWD or 4WD vehicles simply do not apply to their Forester. However, staying on top of routine servicing and inspecting the AWD-related drivetrain components is still essential to maintain that smooth driving experience.