Checks, in order
- Transmission fluid levelThe factory fill is commonly reported to read low when checked properly. Check it with the truck level, at the correct fluid temperature, using the procedure in the service manual, and top off only to the correct level. The automatic has no dipstick, so this is done at the check plug, not by guessing.medium $ · under about $50
- Tire size and gearingLarger or heavier tires lower your effective gearing and make the transmission work harder. If hunting started after a tire or lift change, that is a strong clue, and regearing or a smaller tire is the real fix.easy $ · under about $50
- Drive mode and gear selectionTry Sport mode or use manual shift mode (S gear) to hold a gear on the grade. If that cures the symptom, the behavior is tuning, not a failure.easy $ · under about $50
- Stored codes and software updatesScan for transmission and engine codes and ask a Toyota dealer whether any reflash is available for your VIN. Do not assume one exists; ask.medium $$ · about $50 to $500
- Fluid condition and serviceDark, burnt-smelling or gritty fluid means a drain and fill with the correct Toyota fluid, done by level procedure. Do not use a high-pressure flush machine.medium $$ · about $50 to $500
Applies to: 2016 to 2023 Tacoma with the 2TR-FE 2.7L four and the 2GR-FKS 3.5L V6, with the 6-speed automatic or 6-speed manual. Engine-specific checks are labeled; everything else applies to both.
Tools and parts for these checks
Links below are affiliate links: toyotadata earns a commission from VEVOR and, as an Amazon Associate, from qualifying Amazon purchases, at no extra cost to you. Confirm fitment for your exact truck before you order.
| ITEM | USED FOR | BUY |
|---|---|---|
| Automatic transmission fluid for your truck | Topping off or changing to the factory fluid type | Shop on Amazon |
| ATF fill pump with transmission adapters, 8 L | Filling fill-and-check transmissions through the fill plug | Shop on VEVOR |
| Bluetooth OBD2 scanner with live data | Reading and clearing codes and watching live sensor data | Shop on Amazon |
Go deeper
- 3rd Gen Tacoma Transmission Fluid Check: Why Your Factory Fill Might Be Low |
- Biggest Tires That Fit Stock 3rd & 4th Gen Toyota Tacomas: The Definitive Guide
Other transmission problems on the 3rd Gen Tacoma
More 3rd Gen Tacoma problems
- Engine temperature climbing or overheating warning (Cooling)
- Turn the key or press the button: click or nothing, engine won't crank (Starting & Charging)
- Engine cranks but won't start or dies right after starting (Fuel & Ignition)
- Rough idle, shaking at a stop or misfire (P0300 to P0306) (Fuel & Ignition)
- Check engine light with lean codes (P0171, P0174) (Emissions)
- Vibration or shake at highway speed (Steering & Suspension)
All 16 3rd Gen Tacoma symptoms in the interactive troubleshooter →
General guidance from owner experience. Confirm torque specs, fluid capacities and procedures in the factory service manual. Brakes, steering and anything structural: if in doubt, have a qualified shop inspect it before driving.