how to fix Toyota Highlander shuddering when accelerating?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Engine Mounts

• Tools Required: Socket set, torque wrench, jack, and jack stands.
• Sub-steps:
  1. Raise the vehicle securely on jack stands.
  2. Locate the engine mounts (usually at the front and rear of the engine).
  3. Use a socket set to remove the bolts securing the engine mounts to the engine and chassis.
  4. Replace any damaged engine mounts with new ones, ensuring they match OEM specifications.
  5. Torque the bolts to the manufacturer’s specifications (refer to the vehicle service manual).

3. Check and Replace Transmission Fluid

• Tools Required: Transmission fluid pump, fluid catch pan, socket set.
• Sub-steps:
  1. Locate the transmission fluid dipstick and remove it to check fluid level.
  2. If low, drain the old transmission fluid into a pan.
  3. Replace the transmission filter if applicable (consult the service manual).
  4. Use a fluid pump to fill the transmission with the recommended fluid type until it reaches the proper level.
  5. Recheck the fluid level with the dipstick.

4. Inspect and Service the Drivetrain

• Tools Required: Torque wrench, socket set.
• Sub-steps:
  1. Inspect the driveshaft and axles for any signs of wear or damage.
  2. Replace any worn-out or damaged components.
  3. Ensure all bolts and fasteners are torqued to the specifications listed in the service manual.