why does my Toyota Highlander shake when I accelerate

Toyota Highlander Third Generation (2014-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

543 words

Problem Statement

Learn how to diagnose and fix shaking during acceleration in Toyota Highlander. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Suspension

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 components.

Symptoms

•Vehicle shakes or vibrates during acceleration
•Steering wheel vibrations
•Unusual noises from the engine or drivetrain
•Diminished acceleration power
•Potential check engine light illumination

Diagnostic Steps

1
Inspect tires for uneven wear and proper inflation.
2
Check for loose or damaged wheel bearings.
3
Examine drive shafts and CV joints for damage or wear.
4
Scan for error codes using an OBD-II scanner.
5
Inspect engine and transmission mounts for deterioration.
6
Test drive the vehicle to replicate the shaking and determine its severity.

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
•Jack and jack stands
•Bearing puller

Parts Required

•Tires (if worn)
•Wheel bearings (if damaged)
•Drive shaft (if defective)
•Engine and transmission mounts (if worn)

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Diagnostic Steps

1
Inspect tires for uneven wear and proper inflation.
2
Check for loose or damaged wheel bearings.
3
Examine drive shafts and CV joints for damage or wear.
4
Scan for error codes using an OBD-II scanner.
5
Inspect engine and transmission mounts for deterioration.
6
Test drive the vehicle to replicate the shaking and determine its severity.

Solution

1. Preparation

Gather all necessary tools and parts.
Ensure the vehicle is parked on a level surface and is in gear with parking brake engaged.
Disconnect the battery to ensure safety during repairs.

2. Inspect and Replace Tires (if necessary)

Sub-steps:
- Remove the wheel covers or hubcaps using a flathead screwdriver (if applicable).
- Loosen lug nuts using a socket wrench, then lift the vehicle with a jack.
- Remove the wheels and inspect tires for uneven wear or damage.
- Inflate or replace tires as needed, ensuring they meet manufacturer specifications.
- Reinstall wheels and torque lug nuts to manufacturer’s specifications (typically around 80-100 ft-lbs).

3. Check and Replace Wheel Bearings (if necessary)

Sub-steps:
- Remove the wheel and brake assembly.
- Inspect the wheel bearings for play or roughness.
- If faulty, remove the old bearings using a bearing puller.
- Install new wheel bearings, ensuring they are properly greased and seated.
- Reassemble brake assembly and wheel, then torque lug nuts.

4. Inspect and Replace Drive Shafts/CV Joints (if necessary)

Sub-steps:
- Raise the vehicle and support it on jack stands.
- Visually inspect the drive shafts and CV joints for tears in the boot or signs of wear.
- If damaged, remove the drive shaft by unbolting it from the transmission and differential.
- Replace with a new or remanufactured drive shaft.
- Reinstall and ensure all bolts are torqued to specifications.

5. Check Engine and Transmission Mounts

Sub-steps:
- Locate the engine and transmission mounts.
- Inspect for cracks, wear, or separation.
- Remove any damaged mounts using a socket set.
- Replace with new mounts and ensure they are properly aligned and secured.