my Genesis G70 transmission jerks when shifting what's happening

Genesis G70 1st Gen (2018-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

505 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 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 battery before working on electrical systems.
•Allow the engine to cool before starting maintenance on the transmission.

Symptoms

•Jerking or harsh shifting during gear changes
•Delayed engagement when shifting from park to drive or reverse
•Unusual noises during shifting (clunking or grinding)
•Check engine light illuminated
•Increased RPMs without corresponding acceleration

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related fault codes.
2
Check the transmission fluid level and condition (color and smell).
3
Inspect the transmission control module (TCM) for any visible damage or loose connections.
4
Test the transmission solenoids for proper operation using a multimeter.
5
Perform a road test to replicate the shifting issue and note any specific conditions or behaviors.

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
•Multimeter
•Drain pan

Parts Required

•Transmission fluid
•Transmission filter
•Gasket for transmission pan
•Transmission solenoids (if needed)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related fault codes.
2
Check the transmission fluid level and condition (color and smell).
3
Inspect the transmission control module (TCM) for any visible damage or loose connections.
4
Test the transmission solenoids for proper operation using a multimeter.
5
Perform a road test to replicate the shifting issue and note any specific conditions or behaviors.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a flat surface and set the parking brake.
Disconnect the battery to avoid electrical issues.

2. Transmission Fluid Change

Sub-steps:
1. Locate the transmission fluid drain plug and place a drain pan underneath.
2. Remove the drain plug and allow the fluid to fully drain.
3. Replace the drain plug and torque it to the manufacturer’s specifications.
4. Remove the transmission fluid dipstick and add new transmission fluid through the dipstick tube (using the recommended fluid type).
5. Start the engine and cycle through each gear to circulate the new fluid, then check the dipstick level and add more if necessary.

3. Inspect and Replace Transmission Filter

Sub-steps:
1. Remove the transmission pan bolts and carefully lower the pan.
2. Remove the old filter and install the new transmission filter, ensuring a snug fit.
3. Clean the gasket surface on the transmission and the pan.
4. Install a new gasket and reattach the transmission pan, torquing bolts to the manufacturer’s specifications.

4. Test Transmission Solenoids

Sub-steps:
1. Locate the transmission solenoids (consult service manual for exact location).
2. Disconnect the electrical connectors.
3. Use a multimeter to check the resistance of each solenoid; compare with specifications.
4. Replace any faulty solenoids, reconnect electrical connectors, and ensure secure fit.