2008-2011 Lexus GS460 JDM 1UR-FSE | 4.6L V8 Automatic 8 Speed RWD Transmission AA80E

About this unit

Transmission Specifications

• Transmission Code/Type: AA80E 8-Speed Automatic Transmission

• Drivetrain Layout: RWD (Rear-Wheel Drive)

• Engine Compatibility: 4.6L DOHC V8 (1UR-FSE)

• Application Chassis: Third Generation (S190 Platform) Lexus GS460

• Origin: Authentic JDM (Japan Domestic Market)

Vehicle Fitment & Compatibility

This automatic RWD transmission is a direct drop-in replacement for North American luxury sedan configurations:

• Lexus GS460 (Base & Luxury Trims): 2008, 2009, 2010, 2011

• CRITICAL FITMENT NOTE: This transmission is configured strictly for the Rear-Wheel Drive (RWD) 4.6L V8 (GS460) model. It will NOT fit the GS350 (3.5L V6), GS430 (4.3L V8), GS450h (Hybrid), or any All-Wheel Drive (AWD) layouts. Please verify your vehicle’s engine code and drivetrain layout before completing your purchase.

8-Speed Transmission Installation Notes

CRITICAL SERVICE ADVISORY: High-performance Lexus 8-speed automatic gearboxes feature incredibly tight internal tolerances and advanced electronic controls. To protect your investment and secure your parts warranty, your installer must follow these rules:

1. Transfer USDM Electronics & Sensors: JDM core wiring harnesses are configured for right-hand drive (RHD) vehicles and Japanese body control units. You MUST swap over your original vehicle’s transmission wiring harness, external neutral safety switch, and all input/output speed sensors to guarantee error-free communication with your factory ECU/TCM.

2. Mandatory Transmission Cooler Flush: When an automatic transmission wears out or fails, it sheds microscopic metallic debris into your vehicle’s cooling system lines. You MUST thoroughly hot-flush the transmission cooler lines and heat exchanger before installing this replacement unit. Failing to do so will wash old metal flakes into your clean JDM unit, destroying its intricate valve body solenoids instantly.

3. Seating the Torque Converter: Ensure the included torque converter is fully slotted and stepped down into the internal fluid pump engagement splines before sliding the bellhousing against the V8 engine block. If forced together when misaligned, you will crack the internal oil pump gear.

4. Change Out External Seals: Replace the front pump/torque converter input seal, shift selector shaft seal, and the rear tailshaft output seal while the unit is resting on the shop floor.

5. Strict Fluid Requirements: Never use standard or generic automatic transmission fluid (ATF). Refill the unit exclusively with Toyota/Lexus Genuine ATF World Standard (WS) fluid. Using improper aftermarket fluid will lead to premature clutch wear, irregular shift points, and will immediately void the parts warranty. Always check and set the fluid level using the vehicle’s factory temperature-overflow procedures.

What is included

You receive exactly what is pictured. Engines are supplied as a long block assembly with the components visible in the photos. Accessories such as the alternator, starter, intake manifold or sensors are included only where you can see them on the unit, so check the photographs before ordering and ask us if anything is unclear.

Before you order

• Confirm the engine code against your own vehicle, not just the model year.
• Japanese market units can differ from the US version in intake, loom and sensors.
• Replace the timing components, water pump and seals while the unit is out. It is cheap insurance on an engine this age.
• Keep your original accessories until the swap is finished and running.