why is my Toyota Corolla E170 (2013-2019) transmission slipping when shifting

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

563 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

•Allow the engine to cool before working on the transmission system.
•Use gloves and eye protection when handling transmission fluid, as it can be harmful.

Symptoms

•Check engine light illuminated
•Delayed or harsh shifting
•Engine RPMs increase without corresponding vehicle speed
•Fluid leaks under the vehicle
•Poor acceleration performance
•Unusual noises during shifting (grinding or whining)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related codes.
2
Check the transmission fluid level with the dipstick; ensure it is at the proper level and is not discolored or burnt.
3
Inspect the transmission fluid for contamination or metallic particles.
4
Examine the transmission filter for clogs or restrictions.
5
Check for any visible leaks or damage to transmission lines and seals.
6
Test the condition of the transmission control module (TCM) using a multimeter.

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
•Transmission funnel
•Drain pan
•Screwdriver
•Gasket scraper

Parts Required

•Transmission fluid (specific type as per manufacturer’s specification)
•Transmission filter
•Transmission pan gasket

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related codes.
2
Check the transmission fluid level with the dipstick; ensure it is at the proper level and is not discolored or burnt.
3
Inspect the transmission fluid for contamination or metallic particles.
4
Examine the transmission filter for clogs or restrictions.
5
Check for any visible leaks or damage to transmission lines and seals.
6
Test the condition of the transmission control module (TCM) using a multimeter.

Solution

1. Preparation

Ensure the vehicle is parked on a level surface and the engine is off.
Gather all tools and parts required for the repair.

2. Change Transmission Fluid

Tools Required: Socket set, transmission funnel, drain pan.
Steps:
1. Remove the transmission drain plug and allow old fluid to drain completely into a pan.
2. Replace the drain plug and torque it to the manufacturer's specifications (usually around 30 ft-lbs).
3. Remove the transmission fluid dipstick and use a funnel to add new transmission fluid (check owner's manual for the correct type and quantity).

3. Replace Transmission Filter

Tools Required: Socket set, screwdriver, gasket scraper.
Steps:
1. Remove the transmission pan by unscrewing the bolts; use a gasket scraper to remove old gasket material.
2. Replace the old filter with a new one, ensuring it is seated properly.
3. Reinstall the transmission pan with a new gasket, tightening the bolts to the specified torque (usually around 10-15 ft-lbs).

4. Inspect and Repair Leaks

Tools Required: Inspection mirror, shop towels.
Steps:
1. Visually inspect all transmission lines, seals, and connections for signs of leaks.
2. Replace any defective seals or lines as necessary, using appropriate sealing methods.

5. Reset Transmission Control Module

Tools Required: OBD-II scanner.
Steps:
1. Using the OBD-II scanner, clear any stored error codes related to the transmission.
2. Disconnect the battery for 15 minutes to reset the TCM, then reconnect.