How much transmission fluid does a Lexus GX 460 hold?
The GX 460 holds about 12 quarts of automatic transmission fluid for a full change. A simple pan drain-and-fill typically replaces around 6–7 quarts, with exact amounts varying by year, whether the torque converter is drained, and whether the transmission filter is replaced.
Official capacity and typical service volumes
The following figures reflect common service scenarios for the GX 460 equipped with the A750F six‑speed automatic transmission. Exact amounts can vary by model year and by whether you perform a full flush or only a drain-and-fill.
- Total system capacity for a full fluid change (including the torque converter and a new filter): approximately 12.0–12.5 quarts (11.4–11.9 liters).
- Pan drain-and-fill volume (without draining the torque converter): typically about 6–7 quarts (5.7–6.6 liters).
These ranges are commonly cited in service guidance and reflect typical maintenance practices. Always verify the capacity for your exact year and transmission setup with the owner's manual or a Lexus service bulletin.
What affects the capacity figures
Several factors can shift the actual fluid needed for a given service on a GX 460. The main variables are:
- Whether you perform a full flush (which may attempt to replace fluid from the torque converter) or simply do a pan drain and fill.
- Whether the transmission filter is replaced during the service.
- The model year and production date, as some revisions affect internal capacitance and fluid routing.
- The exact ATF specification used (Toyota/Lexus WS type vs other equivalents) and compatibility requirements.
In practice, the most common DIY maintenance is a pan drain and fill, which sits in the 6–7 quart range, while a professional flush or complete replacement typically targets roughly 12 quarts or more, depending on how aggressively the system is flushed and which components are included.
Maintenance tips for GX 460 transmission fluid
Keep these guidance points in mind when servicing the GX 460 transmission:
- Use the recommended ATF WS (World Standard) fluid specified by Lexus/T Toyota for the GX 460. Do not mix fluids with different specifications.
- Check the level on level ground and with the transmission at operating temperature per the owner's manual or service guide.
- Replace the transmission filter when performing a full fluid change to ensure proper filtration and cooling performance.
- If you plan a full flush, consider having the service performed by a qualified technician to ensure the torque converter and cooler passages are adequately addressed.
Always consult the vehicle’s owner manual or a Lexus dealer for the exact capacity and procedure applicable to your specific year and VIN. Proper maintenance helps sustain shifting performance and transmission longevity.
Summary
For a Lexus GX 460, expect roughly 12 quarts of ATF for a complete fluid change, including the torque converter and a new filter. A basic pan drain-and-fill typically replaces about 6–7 quarts. The exact figures depend on the year, service method, and whether a filter is replaced. When in doubt, verify with official Lexus documentation or a dealership to ensure you use the correct fluid type and capacity for your specific vehicle.
