Parts for your 2020 Subaru Legacy-Driveshafts

Driveshafts on the 2020 Subaru Legacy: What You Need to Know

The 2020 Subaru Legacy is a popular midsize sedan known for its smooth ride, all-wheel-drive capability, and reliability. When it comes to its drivetrain components, a common question that pops up is about the driveshafts. Are driveshafts actually used on this model, and if so, what role do they play? Let's dive into it.

Firstly, it's important to understand that the 2020 Subaru Legacy is equipped with Subaru's well-known Symmetrical All-Wheel Drive system. This AWD system has a layout that naturally requires driveshafts to transfer power efficiently. Unlike front-wheel-drive cars that only need CV axles to drive the front wheels, the Legacy's AWD configuration means power flows to both the front and rear wheels, requiring additional drivetrain components.

The 2020 Subaru Legacy uses a driveshaft to channel power from the transmission or transaxle to the rear differential. From there, the power is split between the left and right rear wheels via half shafts (or rear CV axles). This means the driveshaft is a crucial part of the AWD system, enabling balanced traction across wet, slippery, or rough conditions - which Subaru is famous for.

A driveshaft is essentially a rotating tube or shaft that connects the output from the transmission or transfer case to the rear differential in AWD or 4WD vehicles. It plays the vital role of transmitting engine torque to the rear wheels while allowing for flexibility as the suspension moves up and down. The design typically involves constant velocity (CV) joints or universal joints to handle angles and movement without compromising power delivery or smoothness.

On the 2020 Subaru Legacy, the driveshaft sits under the car, running longitudinally from the front-mounted boxer engine and transmission area to the rear differential assembly. This component is engineered to withstand high rotational forces and to operate quietly without vibrations, contributing to the Legacy's smooth drive.

From a maintenance and servicing perspective, the driveshaft on a 2020 Subaru Legacy shouldn't be something owners need to worry about too much if the vehicle is treated well. However, over time and with high mileage, it can be subject to wear and tear, especially if the car is driven on rough roads or exposed to corrosive environments like salty coastal areas or winter roads treated with salt.

Here are a few key points to keep in mind when it comes to driveshaft maintenance and replacement on a 2020 Subaru Legacy:

• Regular inspections during service intervals: Mechanics will typically check the driveshaft and its associated joints for any signs of excessive play, cracks, or grease leakage. This is often part of the routine underbody or suspension inspection.
• Listen for unusual noises: If the driveshaft's CV joints or universal joints start to fail, you may notice clicking, clunking, or vibrations, especially when accelerating or turning. These sounds are a clear indicator that the driveshaft or its components need attention.
• Protective boots and CV joint lubrication: The driveshaft joints are generally covered by rubber boots that keep grease in and dirt out. If these boots are torn or damaged, dirt can get in and cause premature wear. Replacing the boots or, if necessary, the entire driveshaft may be needed.
• Corrosion and rust prevention: Since the driveshaft is exposed, rust or corrosion can be a factor, particularly in Australia's coastal regions. Regular washes of the underbody can help minimise this risk.
• Replacement timing: Driveshaft replacement is not a scheduled item like oil or filters but is done on an as-needed basis. A well-maintained driveshaft can last the life of the vehicle, but if it fails, replacement is vital for proper functioning of the AWD system.

Replacing the driveshaft on a 2020 Subaru Legacy isn't a quick roadside fix. It requires some mechanical expertise because the component is connected between the transmission and the rear differential, and it involves removal of underbody components. It's a good idea to have a qualified Subaru technician or trusted workshop handle any repairs or replacements to ensure everything is fitted correctly and balanced.

Keeping an eye on any signs of concern and trusting your regular Subaru servicing can help maintain the driveshaft's performance. With good care, the driveshaft will continue enabling your all-wheel-drive Legacy to handle everything from urban streets to weekend getaways with confidence and stability.