my Toyota Corolla E210 (2019-2024) makes a grinding noise when shifting gears, what's up?

Solution

1. Preparation

• Gather tools: socket set, torque wrench, OBD-II scanner, fluid catch pan, and a multimeter.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Change Transmission Fluid

• Fluid Inspection:

  • Remove the transmission dipstick (if applicable) and check fluid level and condition.
  • If the fluid is low or dirty, proceed to change it.

• Fluid Change:

  • Place a fluid catch pan under the transmission.
  • Remove the transmission pan bolts and allow fluid to drain completely.
  • Inspect the transmission filter (if applicable) and replace it if clogged.
  • Install a new gasket and reassemble the pan, tightening bolts to manufacturer specifications (usually around 8-12 ft-lbs).
  • Refill the transmission with the correct type of fluid (check owner's manual for specifications).

3. Inspect Clutch System (if applicable)

• Remove the clutch inspection cover (if applicable).
• Check the clutch disc for wear; replace if thickness is below specifications.
• Inspect the pressure plate and the release bearing for damage.
• Adjust or replace any worn components.

4. Check Transmission Linkage

• Inspect the shift linkage for proper adjustment. If misaligned, adjust to manufacturer specifications.
• Replace any worn or damaged linkage components to ensure smooth shifting.

5. Verify Transmission Mounts

• Inspect the transmission mounts for signs of cracking or wear. Replace if necessary as faulty mounts can cause misalignment and grinding noises during shifts.