Subaru Subaru Legacy 1989-1993 Drivetrain Specifications

The 1989-1993 Subaru Legacy is compatible with both front-wheel drive (FWD) and all-wheel drive (AWD) configurations. The AWD system, known as Subaru's Symmetrical AWD, features a 50:50 torque split between the front and rear axles. The transmission options include a 5-speed manual or a 4-speed automatic. Compatibility with aftermarket parts depends on the specific model year and trim level.

Regular maintenance for the Legacy's drivetrain includes checking and replacing the transmission fluid every 30,000-60,000 miles, inspecting the driveshaft and CV joints for wear, and ensuring the differential fluid is changed every 60,000 miles. The AWD system requires periodic inspection of the transfer case and rear differential. Always refer to the owner's manual for specific intervals and fluid types.

To replace the driveshaft, first, secure the vehicle on a lift or jack stands. Remove the exhaust system and heat shields for access. Unbolt the driveshaft from the transmission and rear differential. Mark the driveshaft orientation for proper reinstallation. Install the new driveshaft, ensuring it aligns with the marked positions. Reattach all bolts and components, and torque to factory specifications. Test drive to confirm proper operation.

If the AWD system malfunctions, check the fuse for the AWD control module and inspect the wiring for damage. Verify the condition of the tires, as mismatched sizes can cause issues. Inspect the transfer case and rear differential for leaks or damage. If the problem persists, use a diagnostic tool to check for error codes and consult a professional mechanic.

To optimize drivetrain performance, use high-quality synthetic fluids for the transmission and differentials. Upgrade to performance axles and CV joints for increased durability. Ensure proper alignment and tire balance to reduce strain on the drivetrain. Regularly inspect and maintain the AWD system components to ensure optimal torque distribution and handling.