why does my Toyota Highlander Third Generation (2014-2019) have a hard time shifting gears?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to prevent electrical shorts.

2. Check and Change Transmission Fluid

• Sub-steps:

  1. Locate the transmission dipstick and remove it.
  2. Using a funnel, add the appropriate type of transmission fluid (consult owner’s manual for specifications).
  3. If the fluid is low or dirty, drain the old fluid by removing the transmission drain plug.
  4. Replace the drain plug and refill with new transmission fluid to the correct level.

• Tools Required:

  • Funnel
  • Transmission fluid (as specified in the owner’s manual)
  • Drain pan

3. Inspect and Replace Transmission Filter

• Sub-steps:

  1. Remove the transmission pan by unscrewing the bolts (use a torque wrench to ensure proper reinstallation).
  2. Carefully detach the old filter from the transmission.
  3. Install the new filter and reattach the pan, ensuring a proper seal with a new gasket.
  4. Torque the pan bolts to the manufacturer’s specified torque value.

• Tools Required:

  • Socket set
  • Torque wrench
  • New transmission filter and gasket

4. Test and Adjust Transmission Control Module

• Sub-steps:

  1. Reconnect the battery.
  2. Use the OBD-II scanner to check for any remaining codes.
  3. If codes are present, follow the specific diagnostic procedures outlined for the TCM.
  4. Clear any codes and perform a test drive to ensure proper shifting.

• Tools Required:

  • OBD-II scanner