my Toyota Corolla E170 (2013-2019) feels like it's slipping out of gear

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

599 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 the 2013-2019 Toyota Corolla E170. 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 opening the transmission fluid fill plug.

Symptoms

•Transmission slips during acceleration
•Unusual engine revving without corresponding vehicle speed increase
•Check engine light illuminated
•Harsh or delayed shifts
•Fluid leaks beneath the vehicle
•Increased engine RPMs when the vehicle is in gear

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related trouble codes.
2
Check the transmission fluid level and condition; low or dirty fluid can cause slipping.
3
Inspect the transmission fluid for contamination or burnt smell.
4
Visually inspect the transmission linkage and mounts for any signs of damage or wear.
5
Test drive the vehicle while monitoring transmission performance to confirm symptoms.
6
Verify the operation of the transmission control module and related electrical connections.

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 pump
•Fluid catch pan
•Funnel
•Socket set
•Wrench set
•Torque wrench
•Multimeter
•Wire brush

Parts Required

•Toyota ATF WS transmission fluid
•Transmission linkage (if damaged)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related trouble codes.
2
Check the transmission fluid level and condition; low or dirty fluid can cause slipping.
3
Inspect the transmission fluid for contamination or burnt smell.
4
Visually inspect the transmission linkage and mounts for any signs of damage or wear.
5
Test drive the vehicle while monitoring transmission performance to confirm symptoms.
6
Verify the operation of the transmission control module and related electrical connections.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery to ensure safety while working on the electrical components.

2. Check and Replace Transmission Fluid

Tools Required: Transmission fluid pump, fluid catch pan, funnel.
Sub-steps:
1. Locate the transmission dipstick or fill plug.
2. Remove the dipstick or fill plug and check the fluid level.
3. If the fluid is low, use the transmission fluid pump to add the correct type of fluid (Toyota ATF WS).
4. If the fluid is dirty or burnt, drain the old fluid into the catch pan and replace with new fluid.
5. Recheck the fluid level after adding new fluid and adjust as necessary.

3. Inspect and Repair Transmission Linkage

Tools Required: Socket set, wrench set, and a torque wrench.
Sub-steps:
1. Lift the vehicle securely using jack stands.
2. Inspect the transmission linkage for any loose or damaged connections.
3. Tighten any loose bolts to the manufacturer's torque specifications.
4. If the linkage is damaged, replace it with a new component.

4. Check Electrical Connections

Tools Required: Multimeter, wire brush.
Sub-steps:
1. Locate the transmission control module and associated wiring harnesses.
2. Disconnect the wiring connectors and inspect for corrosion or damage.
3. Use a multimeter to test for continuity and proper voltage.
4. Clean any corroded contacts with a wire brush and reconnect securely.

5. Reconnect Battery and Test

Reconnect the battery terminals securely.
Start the vehicle and perform a test drive to monitor for improved transmission performance.