how to fix transmission jerking when shifting in Toyota Highlander Third Generation (2014-2019)

Toyota Highlander Third Generation (2014-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

4 min read

602 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 how to diagnose and fix transmission jerking in Toyota Highlander (2014-2019). Step-by-step guide with symptoms, diagnostics, 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 engine to cool before working on the transmission.

Symptoms

•Jerking or harsh shifting between gears
•Delayed engagement when shifting from park to drive or reverse
•Slipping sensation during acceleration
•Unusual noises such as clunking or grinding during shifts
•Check engine light illuminated (if applicable)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related trouble codes.
2
Check the transmission fluid level and condition; look for signs of contamination or burnt smell.
3
Inspect the transmission fluid for proper color and viscosity; it should be bright red and not dark or brown.
4
Visually inspect the transmission mounts for any signs of wear or damage.
5
Verify the operation of the throttle position sensor and any related electrical components.
6
Test drive the vehicle under various conditions to replicate the jerking issue and observe any patterns.

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
•Transmission fluid pump
•Drain pan
•Multimeter
•Jack and jack stands

Parts Required

•Transmission fluid (Toyota ATF WS)
•Transmission filter (if applicable)
•Transmission mounts (if needed)
•Throttle position sensor (if needed)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related trouble codes.
2
Check the transmission fluid level and condition; look for signs of contamination or burnt smell.
3
Inspect the transmission fluid for proper color and viscosity; it should be bright red and not dark or brown.
4
Visually inspect the transmission mounts for any signs of wear or damage.
5
Verify the operation of the throttle position sensor and any related electrical components.
6
Test drive the vehicle under various conditions to replicate the jerking issue and observe any patterns.

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a level surface and engage the parking brake.
Disconnect the battery to ensure safety while working on electrical components.

2. Transmission Fluid Change

Tools Required: Socket set, transmission fluid pump, drain pan.
Sub-steps:
1. Place a drain pan under the transmission pan.
2. Remove the transmission pan bolts and carefully lower the pan, allowing fluid to drain completely.
3. Inspect the pan for metal shavings or debris, which may indicate internal wear.
4. Replace the transmission filter if applicable; remove the old filter and install the new one securely.
5. Reinstall the transmission pan with a new gasket; torque the bolts to the manufacturer’s specifications (typically around 8-10 ft-lbs).
6. Refill the transmission with new fluid through the dipstick tube using a pump; use the manufacturer-recommended fluid type (usually Toyota ATF WS).

3. Inspect and Replace Transmission Mounts (if necessary)

Tools Required: Socket set, jack and jack stands.
Sub-steps:
1. Raise the vehicle using a jack and secure it with jack stands.
2. Locate the transmission mounts and visually inspect for cracks or excessive wear.
3. If damaged, unbolt the old mounts and replace them with new ones, ensuring proper alignment.
4. Re-torque the mounting bolts to the specified torque value.

4. Throttle Position Sensor Adjustment/Replacement (if necessary)

Tools Required: Multimeter, socket set.
Sub-steps:
1. Locate the throttle position sensor on the throttle body.
2. Disconnect the electrical connector and use a multimeter to check the voltage output.
3. If readings are outside the specified range, replace the sensor with a new one.
4. Reconnect the electrical connector and clear any stored error codes.