2020 Toyota Tacoma Transmission Fluid & Service

Quick answer

• Transmission Make/Model: Toyota AC60F (6-speed automatic)
• OEM Fluid Spec: Toyota WS (World Standard) Automatic Transmission Fluid
• Drain & Fill Capacity: Approximately 3.5 - 4.5 quarts
• Full Overhaul Capacity: Approximately 10.5 quarts
• Filter OEM Part Number: Toyota does not specify a replaceable filter for routine maintenance on the AC60F; it uses a screen. A pan gasket is typically replaced during services where the pan is removed. Please verify with a Toyota dealer or service manual.
• Recommended Service Interval: Inspect every 60,000 miles, replace at 100,000 – 120,000 miles for normal duty; more frequently (e.g., 60,000 miles) for severe duty/towing.

Fluid type explained

The 2020 Toyota Tacoma, when equipped with the automatic transmission, utilizes the Toyota AC60F six-speed automatic transmission. This transmission is specifically designed to operate with Toyota WS (World Standard) Automatic Transmission Fluid. It is crucial to use only genuine Toyota WS fluid or a high-quality aftermarket fluid that explicitly states compliance with Toyota WS specifications. Using the incorrect fluid can lead to premature wear, poor shift quality, overheating, and ultimately, transmission failure.

Toyota WS fluid is a low-viscosity, long-life, synthetic-based fluid engineered to provide optimal performance and protection for Toyota's modern automatic transmissions. It offers excellent thermal stability, wear protection, and consistent shift performance across a wide range of operating temperatures. Do not substitute with Dexron, Mercon, or any other general-purpose ATF, as these fluids do not meet the precise requirements of the AC60F transmission.

Service procedure

Unlike many transmissions with easily replaceable spin-on filters, the Toyota AC60F typically employs an internal screen rather than a traditional filter for routine maintenance. Therefore, a complete fluid exchange is often recommended for more thorough servicing. However, a simpler drain and fill procedure can also be performed.

Drain & Fill

A drain and fill procedure involves draining the fluid from the transmission pan and refilling it with new fluid. This method replaces only a portion of the total transmission fluid, leaving a significant amount of old fluid in the torque converter and other internal components. While it's easier and less expensive than a full exchange, it's often considered a partial service.

• Capacity: Expect to replace approximately 3.5 to 4.5 quarts during a drain and fill. The exact amount will vary slightly depending on how much fluid drains out.
• Procedure overview: The vehicle is typically lifted, the drain plug on the transmission pan is removed to allow the old fluid to drain, and then the pan is refilled through the fill plug (often located on the side or top of the transmission, or in some cases, through the dipstick tube if present, though many modern Toyota transmissions are sealed and do not have a dipstick). Precise fluid level checking is critical and often involves specific temperature ranges and overflow procedures.

Full Exchange (Fluid Flush)

A full fluid exchange, often referred to as a