why is my Toyota RAV4 XA40 (2013-2018) leaking transmission fluid

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a level surface and engage the parking brake.
• Place a drain pan under the transmission to catch any fluid.

2. Replace Transmission Fluid Pan Gasket

1. Remove the Transmission Pan
   • Use a socket set to remove the bolts securing the transmission pan.
   • Carefully lower the pan, allowing excess fluid to drain into the pan below.
2. Clean the Pan and Surface
   • Clean the transmission pan and the mating surface on the transmission with a gasket scraper.
   • Ensure no old gasket material remains.
3. Install New Gasket
   • Place the new gasket onto the pan or the transmission surface as per the manufacturer’s instructions.
   • Reinstall the transmission pan and torque the bolts to the manufacturer’s specifications (typically around 8-10 ft-lbs).

3. Inspect and Replace Transmission Cooler Lines (if necessary)

1. Visual Inspection
   • Check the transmission cooler lines for any signs of wear or damage.
2. Remove and Replace Lines
   • If leaks are detected, use a wrench to disconnect the lines from the transmission and the cooler.
   • Install new lines, ensuring to replace any O-rings or seals.
   • Tighten to manufacturer specifications without over-torquing.

4. Replace Input/Output Shaft Seals (if necessary)

1. Remove Driveshaft or Axles
   • If replacing output shaft seal, remove the driveshaft or half shafts as needed.
   • Use a seal puller to carefully remove the old seal.
2. Install New Seal
   • Lubricate the new seal with transmission fluid and gently tap it into place using a seal installer.
   • Reinstall driveshaft or half shafts.