why does my Genesis G70 jerk when I shift gears

Genesis G70 1st Gen (2018-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

561 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 symptoms, diagnostic steps, 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 opening the transmission fluid pan.

Symptoms

•Jerking or harsh shifting during gear changes
•Transmission slipping or delayed engagement
•Unusual noises during shifting (e.g., clunking or grinding)
•Check engine light illuminated
•Poor fuel economy
•Vibration felt in the cabin during acceleration

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related faults.
2
Check transmission fluid levels and condition; low or dirty fluid can cause shifting issues.
3
Inspect the transmission mount for wear or damage that may lead to improper alignment.
4
Test the throttle position sensor (TPS) for proper operation using a multimeter.
5
Perform a visual inspection of the gear linkage and cables for binding or misalignment.
6
Check for any software updates for the transmission control module (TCM) that may address shifting issues.

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
•Multimeter
•Transmission fluid pump
•Socket set
•Torque wrench
•Jack
•Jack stands
•Screwdriver

Parts Required

•Transmission fluid
•Transmission filter (if applicable)
•Transmission mount
•Throttle position sensor (if applicable)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related faults.
2
Check transmission fluid levels and condition; low or dirty fluid can cause shifting issues.
3
Inspect the transmission mount for wear or damage that may lead to improper alignment.
4
Test the throttle position sensor (TPS) for proper operation using a multimeter.
5
Perform a visual inspection of the gear linkage and cables for binding or misalignment.
6
Check for any software updates for the transmission control module (TCM) that may address shifting issues.

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a level surface and secure it with wheel chocks.
Disconnect the battery to ensure safety while working on electrical components.

2. Check and Replace Transmission Fluid

Tools Required: Transmission fluid pump, funnel, socket set, torque wrench.
Remove the transmission fluid pan (if applicable) and drain old fluid into a clean container.
Inspect the fluid for metal shavings or burnt smell; if contaminated, proceed to replace the filter.
Replace the transmission filter (if applicable) by unbolting and removing the old filter.
Reinstall the pan with a new gasket, tightening bolts to manufacturer’s specified torque.
Fill the transmission with the recommended type and amount of fluid using a funnel.

3. Inspect and Replace Transmission Mount

Tools Required: Jack, jack stands, socket set.
Support the transmission with a jack and remove the bolts securing the transmission mount.
Carefully lower the transmission slightly to replace the mount.
Install the new mount and secure it with the original bolts, tightening to manufacturer specifications.

4. Test and Adjust Throttle Position Sensor

Tools Required: Multimeter, screwdriver.
Disconnect the TPS connector and check the voltage output with a multimeter.
If the reading is outside the manufacturer’s specified range, replace the TPS.
Reconnect the TPS and clear error codes from the OBD-II scanner.