why does my Honda Accord 9th Generation (2013-2017) transmission slip when accelerating?

Honda Accord Eleventh Generation (2023-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

567 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 issues in Honda Accord 9th Generation (2013-2017). Step-by-step guide with symptoms and solutions.

Affected Component

Transmission

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Allow the engine to cool before opening the transmission to prevent burns.

Symptoms

•Check engine light illuminated
•Unusual engine revving without acceleration
•Delayed or harsh shifting
•Transmission fluid leaking under the vehicle
•Increased engine RPM with little to no increase in speed
•Burning smell coming from the transmission area

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify potential transmission-related codes.
2
Check the transmission fluid level and condition; look for discoloration or a burnt smell.
3
Inspect the transmission for any visible leaks or damage to seals and gaskets.
4
Test drive the vehicle while monitoring the transmission's behavior and any abnormal sounds.
5
Check the operation of the transmission control module and related sensors.
6
Inspect the throttle position sensor for proper functionality.

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
•Transmission fluid dipstick
•Socket set
•Rags for cleanup
•Transmission jack
•Drain pan

Parts Required

•Honda ATF DW-1 transmission fluid
•Transmission filter (if applicable)
•Gasket for transmission pan

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify potential transmission-related codes.
2
Check the transmission fluid level and condition; look for discoloration or a burnt smell.
3
Inspect the transmission for any visible leaks or damage to seals and gaskets.
4
Test drive the vehicle while monitoring the transmission's behavior and any abnormal sounds.
5
Check the operation of the transmission control module and related sensors.
6
Inspect the throttle position sensor for proper functionality.

Solution

1. Preparation

Tools Required: OBD-II scanner, transmission fluid dipstick, socket set, rags for cleanup.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the negative battery terminal to avoid electrical issues.

2. Check and Replace Transmission Fluid

Locate the transmission fluid dipstick and remove it.
Wipe it clean, reinsert, and then remove again to check the fluid level.
If low, add the appropriate Honda transmission fluid (e.g., ATF DW-1) until it reaches the correct level.
If fluid is dirty or burnt, proceed to drain and replace the fluid.
- Sub-steps:
  - Place a drain pan under the transmission pan.
  - Remove the transmission fluid pan bolts using a socket set.
  - Carefully lower the pan and allow the old fluid to drain completely.
  - Clean the pan and replace the filter if equipped.
  - Reinstall the pan with a new gasket and torque bolts to manufacturer specifications (typically 8-10 ft-lbs).
  - Refill with new transmission fluid through the dipstick tube.

3. Inspect and Repair Transmission Components

If the fluid check does not resolve the issue, inspect the internal components of the transmission.
Remove the transmission from the vehicle if necessary for internal inspection.
- Sub-steps:
  - Disconnect the driveshaft and any wiring harnesses connected to the transmission.
  - Support the transmission with a transmission jack and remove the transmission mounting bolts.
  - Carefully lower the transmission to inspect for worn clutches or bands, damaged gears, or faulty solenoids.
  - Replace any damaged components as needed.