why is my Honda Accord 9th Generation (2013-2017) transmission slipping when I accelerate

Honda Accord Eleventh Generation (2023-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

531 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 slipping in Honda Accord 9th Generation (2013-2017). 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 opening the transmission.

Symptoms

•Engine RPM increases without a corresponding increase in vehicle speed
•Harsh or delayed shifting between gears
•Unusual engine noise during acceleration
•Check engine light illuminated
•Fluid leaks under the vehicle
•Burning smell coming from the transmission area

Diagnostic Steps

1
Scan the vehicle's onboard diagnostic system using an OBD-II scanner to check for any error codes related to the transmission.
2
Inspect the transmission fluid level and condition; look for signs of contamination or burning.
3
Check for any visible fluid leaks around the transmission and seals.
4
Test the transmission fluid pressure using a gauge to determine if it's within the manufacturer's specifications.
5
Inspect the transmission control module (TCM) and wiring for any signs of damage or corrosion.
6
Conduct a road test to evaluate transmission performance under various driving conditions.

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
•Transmission fluid pump
•Fluid pressure gauge

Parts Required

•Honda ATF DW-1
•Transmission filter
•Gasket for transmission pan

Related Faults

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Diagnostic Steps

1
Scan the vehicle's onboard diagnostic system using an OBD-II scanner to check for any error codes related to the transmission.
2
Inspect the transmission fluid level and condition; look for signs of contamination or burning.
3
Check for any visible fluid leaks around the transmission and seals.
4
Test the transmission fluid pressure using a gauge to determine if it's within the manufacturer's specifications.
5
Inspect the transmission control module (TCM) and wiring for any signs of damage or corrosion.
6
Conduct a road test to evaluate transmission performance under various driving conditions.

Solution

1. Preparation

Gather tools and parts necessary for the repair.
Ensure the vehicle is on a level surface and secure it with jack stands.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Check and Replace Transmission Fluid

Remove the transmission dipstick and wipe it clean.
Insert it back and check the fluid level; add fluid as necessary.
If the fluid is burnt or contaminated, drain the old fluid using the drain plug.
Replace with new ATF (Automatic Transmission Fluid) that meets Honda specifications, typically Honda ATF DW-1.
Recheck the fluid level and ensure it’s within the operating range.

3. Inspect and Replace Transmission Filter

Remove the transmission pan bolts using a socket set and carefully lower the pan.
Remove the old filter and replace it with a new one, ensuring the new filter is seated properly.
Clean the transmission pan and magnet; remove any debris.
Reinstall the transmission pan with a new gasket, torquing the bolts to the manufacturer's specifications.

4. Transmission Control Module (TCM) Service

If error codes indicate TCM issues, remove the TCM from its housing.
Inspect the wiring harness and connectors for damage; repair or replace as necessary.
Reinstall the TCM and clear any error codes using the OBD-II scanner.