Lexus GS 2012-2020 Drivetrain Specifications

The 2012-2020 Lexus GS models feature either rear-wheel drive (RWD) or all-wheel drive (AWD) configurations, depending on the trim. The AWD system, known as Lexus Dynamic Torque Control, distributes power between the front and rear axles for improved traction. The GS 350 models are equipped with a 3.5L V6 engine producing 311 horsepower, while the GS 450h hybrid combines a 3.5L V6 with an electric motor for a total output of 338 horsepower. All models use an 8-speed automatic transmission.

Regular maintenance for the Lexus GS drivetrain includes checking and replacing transmission fluid every 60,000 to 100,000 miles, inspecting the driveshaft and differential for wear, and ensuring proper tire rotation to maintain even wear. For AWD models, the transfer case fluid should be inspected and replaced as needed. Additionally, periodic alignment checks and suspension inspections are recommended to ensure optimal drivetrain performance.

Replacing drivetrain components on a Lexus GS requires lifting the vehicle securely and removing the undercarriage panels. For transmission replacement, disconnect the driveshaft, remove the mounting bolts, and carefully lower the transmission. For AWD models, the transfer case and front differential must also be removed. Always refer to the service manual for torque specifications and alignment procedures. Use OEM or high-quality aftermarket parts to ensure compatibility and performance.

Common drivetrain issues in the Lexus GS include transmission slipping, unusual noises from the differential, and AWD system malfunctions. For transmission issues, check fluid levels and condition. Differential noises may indicate worn bearings or insufficient lubrication. AWD problems can often be resolved by inspecting the transfer case and sensors. Use a diagnostic scanner to identify error codes and consult the service manual for specific troubleshooting steps.

To optimize drivetrain performance, ensure regular maintenance, including fluid changes and inspections. Use high-quality synthetic fluids for the transmission and differential. For AWD models, ensure tires are of the same size and tread depth to prevent strain on the system. Consider upgrading to performance suspension components and ensuring proper alignment. Avoid aggressive driving to reduce wear on drivetrain components.