why is my Toyota RAV4 XA40 (2013-2018) making a whining noise from the transmission

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the battery to avoid electrical hazards.

2. Check and Replace Transmission Fluid

• Tools Required: Transmission fluid pump, funnel, socket set.
• Sub-steps:
  1. Remove the transmission fluid dipstick and check the fluid level.
  2. If fluid is low or discolored, drain the old fluid using a transmission fluid pump.
  3. Refill the transmission with the recommended fluid type (Toyota ATF WS) through the dipstick tube using a funnel.
  4. Start the engine and cycle through the gears to circulate the new fluid, then recheck the fluid level.

3. Inspect and Replace Transmission Filter (if applicable)

• Tools Required: Socket set, torque wrench, gasket scraper.
• Sub-steps:
  1. Remove the transmission pan using a socket set, taking care to catch fluid in a pan.
  2. Remove the old filter and inspect for debris or damage.
  3. Install the new filter and reattach the transmission pan with a new gasket, torquing bolts to manufacturer specifications.

4. Inspect and Repair Transmission Components

• Tools Required: Socket set, torque wrench, multimeter (if electrical issues are suspected).
• Sub-steps:
  1. Visually inspect the transmission for any visible damage, wear on gears, or bearings.
  2. Replace any damaged components as necessary.
  3. If electrical issues are suspected, check wiring and connectors for continuity and secure connections.