How many quarts of transmission fluid does a 2018 Toyota Tundra take?
The typical total transmission fluid capacity for a 2018 Toyota Tundra with the 6-speed automatic is about 11.5 quarts for a full fill when replacing the filter. If you’re only performing a simple drain-and-fill, expect roughly 4–7 quarts depending on how much fluid is drained. A machine-assisted flush can require around 12–13 quarts. Always verify the exact spec in the owner’s manual or with a Toyota dealer for your specific build.
Context and what to expect for service work
The 2018 Tundra uses a 6-speed automatic transmission (A750F) in most configurations. Transmission fluid capacity varies by service method and whether a new filter is installed. Fluid type and exact capacity can differ slightly by trim and drivetrain, so consult the service manual or dealer guidance for your vehicle.
Common service scenarios and their typical fluid quantities
The following scenarios reflect common approaches to transmission service and the approximate ATF quantities involved.
- Drain-and-fill (pan drain only, no filter replacement): approximately 4–5 quarts
- Drain-and-fill with filter replacement: approximately 6–8 quarts
- Complete transmission flush (machine-assisted, exchanging nearly all fluid): approximately 12–13 quarts
It’s important to note that the actual amount you need can vary based on the vehicle’s exact configuration, the service process used, and whether the torque converter is drained during the procedure. Always aim to use the specified ATF type for your Tundra and follow the service documentation.
Fluid specification and compatibility
Toyota generally recommends a transmission fluid that matches the factory specification for the A750F. Many dealers today use Toyota ATF WS (World Standard) or a Dexron VI–compatible ATF, depending on the service bulletin and regional guidelines. Do not mix fluids, and verify the correct spec for your 2018 Tundra with the owner’s manual or your Toyota service advisor before refilling.
Summary: For a full fill with filter change, plan on about 11.5 quarts; for a simple drain-and-fill, roughly 4–7 quarts; and for a full flush, about 12–13 quarts. Always confirm the exact figure for your vehicle and use the recommended ATF type.
In the end, knowing these ranges helps you prepare for transmission service on a 2018 Toyota Tundra and ensures you maintain the hydraulics and shifting performance the truck relies on.
