why does my Toyota Highlander Third Generation (2014-2019) make a grinding noise when in gear

Toyota Highlander Third Generation (2014-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

506 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn to diagnose and fix grinding noise in Toyota Highlander transmission (2014-2019). Step-by-step guide with diagnostic and repair instructions.

Affected Component

Transmission

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the vehicle to cool before working on the transmission.

Symptoms

•Grinding noise when the vehicle is in gear
•Difficulty shifting gears
•Vibration felt through the gear shifter
•Unusual smells (burning odor)
•Fluid leaks under the vehicle
•Check engine light illuminated (if applicable)

Diagnostic Steps

1
Inspect the transmission fluid level and condition.
2
Scan for error codes using an OBD-II scanner.
3
Check for any visible leaks around the transmission and differential.
4
Conduct a visual inspection of the transmission mounts for wear or damage.
5
Test drive the vehicle to replicate the noise and determine if it changes with speed or gear selection.
6
Inspect the clutch (if equipped) for wear or damage.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Socket set
•Torque wrench
•Drain pan
•Screwdrivers
•Fluid pump

Parts Required

•Transmission fluid (Toyota ATF WS)
•Gaskets or seals (if applicable)
•Replacement gears or bearings (if needed)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Inspect the transmission fluid level and condition.
2
Scan for error codes using an OBD-II scanner.
3
Check for any visible leaks around the transmission and differential.
4
Conduct a visual inspection of the transmission mounts for wear or damage.
5
Test drive the vehicle to replicate the noise and determine if it changes with speed or gear selection.
6
Inspect the clutch (if equipped) for wear or damage.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and engage the parking brake.
Disconnect the battery to prevent electrical issues during repairs.

2. Inspect and Change Transmission Fluid

Sub-steps:
1. Place a drain pan under the transmission pan.
2. Remove the transmission drain plug or pan bolts (if applicable).
3. Allow old fluid to completely drain.
4. Inspect the fluid for metal shavings or burnt odor.
5. Replace the drain plug, then fill the transmission with the manufacturer's recommended fluid type (typically Toyota ATF WS).
6. Recheck the fluid level with the engine running, adding fluid as necessary.

3. Inspect and Replace Worn Components

Sub-steps:
1. If grinding persists, remove the transmission inspection cover (if applicable).
2. Inspect gears and bearings for wear or damage.
3. Replace any damaged gears or bearings, ensuring to torque bolts to manufacturer specifications.
4. If the clutch is worn (in manual transmissions), replace the clutch kit.

4. Reassemble and Test

Sub-steps:
1. Reinstall any covers or components removed during inspection.
2. Reconnect the battery.
3. Start the vehicle and let it idle, checking for leaks and noises.
4. Test drive the vehicle under various conditions to ensure the repair is successful.