2006-2007 Lexus GS430 4.3L 6 Speed Automatic Transmission JDM 3UZ-FE A760E

About this unit

Vehicle Fitment

This transmission serves as a direct replacement for the following North American models:

• Lexus GS430: 2006, 2007

• Compatibility Note: This is the 6-speed automatic. It will not fit the 2001–2005 GS430 (which uses the 5-speed A650E). Please verify your vehicle has the 4.3L V8 engine, as the GS350 and GS450h use different gearbox configurations.

JDM to USDM Installation & Technical Guide

To ensure 100% OBDII compliance and a seamless swap, professional Lexus technicians recommend these critical steps:

• Internal Harness & Solenoids: You must transfer your original USDM Transmission Internal Wire Harness and Solenoids to the JDM unit. JDM electrical plugs can vary in pin configuration even if the transmission model is the same. Reusing your original electronics ensures the ECU recognizes the unit instantly and prevents “Check Engine” lights or limp mode.

• Neutral Safety Switch: Transfer your original USDM Neutral Safety Switch (Range Sensor). This ensures your dashboard gear indicator and the “Park/Neutral” starting safety circuit function perfectly.

• The “Sealed” Fluid Procedure: This transmission is a “sealed” unit without a dipstick. It is mandatory to use Toyota ATF World Standard (WS) fluid. After installation, the fluid level must be set using the “overflow plug” method at a specific temperature (typically between 35°C and 45°C) to ensure longevity.

• Transmission Cooler Flush: It is mandatory to flush the transmission cooler lines and radiator. Residual metal debris from a previous CVT or gear failure will cause immediate damage to your “new” JDM transmission.

• ECU Reset: We highly recommend a Transmission Adaptive Memory Reset via a professional scan tool to allow the ECU to learn the fresh clutch tolerances of the JDM unit.

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.