The Toyota 30-40LE transmission, also known as the A340E or A340F, is a 4-speed automatic transmission widely used in various Toyota vehicles. This transmission was produced by Aisin-Warner from 1983 to 2015 and installed in both rear-wheel drive and all-wheel drive models.

Specifications

The 30-40LE transmission is designed for engines with up to 4.7 liters of displacement and can handle a maximum torque output of 430 Nm. Here are some key specifications:

  • Production years: 1983 - 2015
  • Number of gears: 4
  • Drive type: Rear-wheel or all-wheel drive
  • Recommended oil: Toyota ATF Type T-IV
  • Oil capacity: 8.3 - 8.9 liters
  • Oil change interval: Every 60,000 km
  • Filter replacement: Every 60,000 km
  • Estimated lifespan: ~400,000 km
  • Weight: 79 kg

Gear Ratios

The 30-40LE transmission features the following gear ratios:

GearRatio
1st2.804
2nd1.531
3rd1.000
4th0.705
Reverse2.393

Vehicle Applications

The 30-40LE transmission was used in various Toyota models, including:

  • Toyota 4Runner (1985-2004)
  • Toyota Pickup (1985-1995, 4x4 with 4-cylinder engine)
  • Toyota T-100 (1995-1998, 4x4)
  • Toyota Tacoma (1995-2015, 4x4, 2005-2015 4-cylinder only)
  • Toyota Tundra (2000-2004, 4x4)
  • Toyota Sequoia (2001-2004, 4x4)
  • Toyota Hilux (2005-2015, 4x4)

Features and Technology

The 30-40LE transmission incorporates several advanced features:

  • Electronic control: The transmission is managed by an electronic control unit (ECU) for optimized shift timing and performance.
  • Lock-up torque converter: This feature improves fuel efficiency by reducing slippage in the torque converter.
  • Overdrive gear: The fourth gear (0.705 ratio) serves as an overdrive, enhancing fuel economy during highway driving.
  • Adaptive shift control: The transmission learns and adapts to the driver's style for smoother gear changes.

Maintenance and Common Issues

Proper maintenance is crucial for the longevity of the 30-40LE transmission. Some common issues and maintenance tips include:

  • Regular fluid changes: Use the recommended Toyota ATF Type T-IV and change it every 60,000 km.
  • Solenoid problems: Faulty solenoids can cause erratic shifting or transmission slipping.
  • Torque converter issues: A failing torque converter can lead to shuddering or slipping, especially during lock-up engagement.
  • Overheating: Ensure the transmission cooler is functioning properly to prevent overheating, which can cause premature wear.

Conclusion

The Toyota 30-40LE transmission has proven to be a reliable and durable option for many Toyota vehicles. With proper maintenance and care, this transmission can provide smooth operation and longevity, making it a popular choice among Toyota enthusiasts and mechanics alike.

FAQs About Toyota 30-40LE Transmission

    • Is the 30-40LE transmission suitable for heavy-duty use?
      While robust, it's best suited for light to medium-duty applications. For heavy-duty use, consider stronger transmission options.
    • Can I use a different type of transmission fluid?
      It's strongly recommended to use only Toyota ATF Type T-IV or an equivalent to ensure optimal performance and longevity.
    • How can I identify if my vehicle has a 30-40LE transmission?
      Check the vehicle's manual or look for a metal tag on the transmission itself, which should display the model number.