my Toyota Highlander Third Generation (2014-2019) is leaking transmission fluid where should I check

Solution

1. Preparation

• Tools Required: Jack and jack stands, drain pan, socket set, torque wrench, transmission fluid, sealant (if needed), and a funnel.
• Raise the vehicle safely using a jack and secure it on jack stands.
• Allow the transmission to cool if it has been recently used.

2. Check and Replace Transmission Fluid

1. Check Fluid Level

   • Remove the dipstick and wipe it clean.
   • Reinsert and remove the dipstick again to check the fluid level; add fluid if low.

2. Drain Old Fluid (if necessary)

   • Place a drain pan under the transmission.
   • Remove the transmission pan bolts and allow fluid to drain completely.
   • Clean the transmission pan thoroughly.

3. Inspect and Replace Gaskets/Seals

1. Remove Transmission Pan

   • Carefully detach the transmission pan from the transmission while ensuring no damage occurs.
   • Remove the old gasket and clean the mating surfaces.

2. Inspect and Replace Seals

   • Check the front and rear seals for wear or damage.
   • Replace any worn or damaged seals.
   • Apply a new gasket or sealant as needed.

4. Reinstall Components

1. Reattach Transmission Pan

   • Position the cleaned transmission pan back onto the transmission.
   • Hand-tighten the bolts and then torque to the manufacturer’s specifications (typically around 10-15 ft-lbs, check service manual for exact values).

2. Refill Transmission Fluid

   • Using a funnel, refill the transmission with the appropriate type of fluid specified in the owner's manual.

5. Final Checks

• Start the engine and allow it to reach operating temperature.
• Cycle through the gears to ensure proper fluid circulation.