Why does my 2020 Toyota Camry have a rough transmission shift?

Toyota Camry Eighth Generation (2018-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

627 words

Problem Statement

Learn how to diagnose and repair rough transmission shifts in the 2020 Toyota Camry with step-by-step instructions and required tools.

Affected Component

transmission

Estimated Time

2-4 hours

Symptoms

•Harsh Shifting
•Delayed Shifting
•Slipping
•Unusual Noises
•Warning Lights

Diagnostic Steps

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
•Funnel
•Clean container
•Floor jack
•Jack stands
•Flashlight
•Wrench set
•Torque wrench
•Multimeter

Related Faults

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Solution

Step 1: Check for Diagnostic Trouble Codes (DTC)

Tools Required: OBD-II Scanner
Instructions:
1. Plug the OBD-II scanner into the vehicle’s OBD-II port, usually located under the dashboard near the steering column.
2. Turn the ignition to the 'ON' position (engine off) and follow the scanner instructions to read DTCs.
3. Record any codes related to the transmission (e.g., P0730 - Incorrect Gear Ratio, P0715 - Input/Turbine Speed Sensor A Circuit).

Step 2: Inspect Transmission Fluid

Tools Required: Transmission fluid dipstick (if equipped), funnel, and clean container.
Instructions:
1. With the engine running and the vehicle in park, remove the transmission fluid dipstick (if applicable).
2. Check the fluid level. The fluid should be within the marked range on the dipstick.
3. Inspect the fluid condition; it should be a bright red color and free of debris or burnt smell.
4. If low, add the recommended transmission fluid (Toyota WS) until it reaches the proper level.

Step 3: Check for Leaks

Tools Required: Floor jack, jack stands, and a flashlight.
Instructions:
1. Safely lift the vehicle and secure it with jack stands.
2. Inspect the transmission housing, lines, and pan for any signs of fluid leaks.
3. Look for pooled fluid under the vehicle.

Step 4: Inspect Transmission Mounts

Tools Required: Wrench set and torque wrench.
Instructions:
1. With the vehicle safely secured, visually inspect the transmission mounts for cracks or wear.
2. Gently shake the transmission to see if there is excessive movement. If mounts are damaged, they need replacement.

Step 5: Examine the Throttle Position Sensor (TPS)

Tools Required: Multimeter.
Instructions:
1. Locate the TPS on the throttle body.
2. Disconnect the TPS connector and set the multimeter to measure resistance.
3. Check the resistance while moving the throttle plate; it should show a smooth transition without any drops or spikes.

Step 6: Road Test

Instructions:
1. Take the vehicle for a test drive to replicate the rough shifting conditions.
2. Pay attention to when the rough shifts occur (e.g., during acceleration, deceleration, etc.).

Repair Instructions

Step 1: Replace Transmission Fluid (if necessary)

Instructions:
1. Drain the old transmission fluid using a drain pan.
2. Replace the transmission filter (if applicable) by removing the pan.
3. Reinstall the pan and fill with new Toyota WS fluid to the proper level.

Step 2: Address Any DTCs

Instructions:
1. If DTCs indicate a faulty sensor or component, replace the faulty part (e.g., TPS, speed sensors).
2. Clear the codes using the OBD-II scanner and test drive to see if the issue persists.

Step 3: Replace Transmission Mounts (if worn)

Instructions:
1. Remove any components obstructing access to the mounts.
2. Unbolt the old mounts and install new ones, ensuring proper alignment and torque specifications.

Step 4: Recalibrate Transmission (if applicable)

Instructions:
1. Some models may require a transmission relearn procedure after servicing.
2. Follow Toyota's specific procedure for the Camry transmission recalibration.

Conclusion

After completing these diagnostic steps and repairs, monitor the vehicle's performance. If the rough shifting persists, it may indicate a more complex internal transmission issue requiring professional assessment. Regular maintenance, including fluid changes and inspections, can prevent many transmission problems.