How much transmission fluid does a 2026 Lexus TX take?

7.7 quarts as a total fill for the UA81F transmission. A drain-and-refill without removing the pan replaces roughly a third to half of that, so refill to the level check point rather than pouring in the whole figure.

What transmission fluid does a 2026 Lexus TX use?

The source names WS for this year. Use a fluid that states that specification on the bottle.

What brake fluid does a 2026 Lexus TX take?

Check the brake fluid reservoir cap - it states the DOT grade. DOT 3 and DOT 4 can be mixed; DOT 5 silicone fluid cannot.

2026 Lexus TX transmission fluid capacity and fluid specs

GarageDex's fluid data shows the 2026 Lexus TX uses the UA81F automatic transmission, which holds 7.7 quarts of fluid as a total fill, specified as WS.

Shop WS fluid Match the specification on the bottle to your manual

Key takeaways

Transmission: UA81F automatic transmission, 7.7 qt total fill, WS fluid.
Total fill is the whole system; a drain-and-refill takes a third to half.
Brake fluid grade: read it off the reservoir cap.
The fluid specification is named by the source - buy a fluid that lists it.

2026 Lexus TX fluids by engine
Engine	Transmission	Total fill	Fluid spec	Brake fluid	Gear oil
2.4L 4-cyl	UA81F automatic	7.7 qt	WS	see reservoir cap	rear GL-5 75W-85 0.55 qt transfer case GL-5 0.55 qt

Fluids for the 2026 Lexus TX

Buy fluid that states the specification your manual names. Multi-vehicle fluids list the specs they meet on the back label - if yours is not listed, it is the wrong bottle.

WS fluidYou need about 8 quarts for a full fillShop fluid DOT 3 or DOT 4 brake fluidA quart covers a full flushShop brake fluid Fluid transfer pumpMost modern transmissions have no dipstick tube - you fill from belowShop pumps

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Source: AMSOIL Auto & Light Truck lookup. Capacities are total system fills; a drain-and-refill takes less. Where no fluid specification is shown, the source lists only a catalog code, so use the specification printed in your owner's manual - the wrong transmission fluid damages a transmission.