In most current Toyota Tundra models with an automatic transmission, the recommended fluid is Toyota ATF WS (World Standard). Dexron VI is an approved substitute if WS isn’t available. Manual transmissions in Toyota Tundra trucks typically require Toyota Genuine Manual Transmission Fluid (MTF).
Automatic transmission fluid for Toyota Tundra
The automatic transmission in most recent Tundra generations uses a specific Toyota fluid designed for their gearboxes. Below are the common options you’ll encounter when servicing an automatic Tundra.
- Toyota ATF WS (World Standard) — the primary specification for current Toyota automatics, including many Tundra models.
- Dexron VI — widely accepted as a compatible substitute when ATF WS is not available or when a service bulletin allows it.
- Other fluids — only if explicitly approved by Toyota for your exact year/transmission; using non-approved fluids can cause transmission damage or void warranties.
Conclusion: In practice, ATF WS should be used as the default fluid; Dexron VI is a backup option only if the manual or dealer specifies it as acceptable for your vehicle.
Manual transmission fluid for Toyota Tundra
The manual gearbox in Tundra pickups requires a different specification from the automatic. The guidance below covers typical scenarios across generations.
- Toyota Genuine Manual Transmission Fluid (MTF) — the commonly recommended fluid for manual gearboxes in many Toyota trucks.
- Viscosity and grade vary by year and transmission code; common recommendations include 75W-90 GL-4/GL-5 equivalents, but always confirm with the owner's manual or a Toyota service advisor.
- Aftermarket alternatives — only if explicitly approved by Toyota for your specific transmission; using unapproved oils can harm gears or void warranties.
Conclusion: Use Toyota Genuine MTF or other fluids specifically approved for your model/year per the owner's manual.
Year-specific notes
Current-generation Tundra (2022–present)
The redesigned Tundra typically uses a 10-speed automatic. Toyota specifies ATF WS as the primary fluid, with Dexron VI allowed as a substitute in certain cases. Always verify the exact specification in your owner’s manual or with a dealer for your trim and production date.
Earlier generations (pre-2022)
Older Tundra models used older automatic transmission designs that may have required Dexron variants or Toyota T-IV fluids, depending on the transmission family. If you own a pre-2022 Tundra, consult your owner's manual or a Toyota service advisor to confirm the exact fluid specification for your vehicle’s transmission code.
Summary
Transmission fluid choices for the Toyota Tundra depend on the transmission type and model year. For automatics, ATF WS is the recommended fluid, with Dexron VI as an approved substitute where WS is unavailable. For manuals, use Toyota Genuine MTF or another fluid explicitly approved for your transmission. Always refer to the owner’s manual or a dealership service advisor for the exact specification for your vehicle.