why does my Genesis G70 jerk when shifting gears?

Genesis G70 1st Gen (2018-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

541 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 issues in Genesis G70. Step-by-step guide with diagnostic procedures 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 inspecting or working on the transmission

Symptoms

•Jerking or lurching sensation during gear changes
•Delayed engagement when shifting from park to drive/reverse
•Unusual noises (clunking or grinding) during shifts
•Check engine light illuminated
•Poor acceleration or hesitation upon acceleration
•Fluid leaks under the vehicle

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner
2
Check transmission fluid level and condition (color and smell)
3
Inspect the transmission control module (TCM) for faults
4
Examine the throttle position sensor (TPS) for proper operation
5
Test the transmission solenoids for functionality
6
Inspect engine and transmission mounts 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
•Fluid pump
•Socket set
•Torque wrench
•Screwdriver set

Parts Required

•Transmission fluid
•Transmission solenoids (if faulty)
•Throttle position sensor (if faulty)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner
2
Check transmission fluid level and condition (color and smell)
3
Inspect the transmission control module (TCM) for faults
4
Examine the throttle position sensor (TPS) for proper operation
5
Test the transmission solenoids for functionality
6
Inspect engine and transmission mounts for wear or damage

Solution

1. Preparation

Gather all necessary tools and parts.
Ensure the vehicle is parked on a flat surface and the engine is off.
Disconnect the battery to ensure safety during repairs.

2. Check and Replace Transmission Fluid

Sub-steps:
1. Remove the transmission dipstick and check the fluid level.
2. If low, add the recommended transmission fluid (refer to owner’s manual for specifications).
3. If the fluid is burnt or dirty, drain the old fluid using a fluid pump.
4. Replace with new transmission fluid, ensuring to use the correct type as specified by the manufacturer.

Tools Required: Fluid pump, funnel
Parts Required: Transmission fluid

3. Inspect and Replace Transmission Solenoids

Sub-steps:
1. Locate the transmission solenoids (refer to the vehicle service manual for location).
2. Disconnect the electrical connectors from the solenoids.
3. Remove the solenoid bolts and take out the solenoids.
4. Install new solenoids and torque the bolts to the manufacturer’s specifications.
5. Reconnect the electrical connectors.

Tools Required: Socket set, torque wrench
Parts Required: Transmission solenoids (if faulty)

4. Inspect and Replace Throttle Position Sensor (TPS)

Sub-steps:
1. Locate the throttle body and find the TPS (usually mounted on the throttle body).
2. Disconnect the electrical connector from the TPS.
3. Remove the mounting screws and take out the old TPS.
4. Install the new TPS and secure it with mounting screws.
5. Reconnect the electrical connector and ensure it is secure.

Tools Required: Screwdriver set
Parts Required: Throttle position sensor (if faulty)