Why is my 2020 Toyota Camry experiencing transmission shudder?

Transmission Shudder in 2020 Toyota Camry: Diagnostic and Repair Guide

Symptoms:

• Vibration or shuddering felt when accelerating
• Noticeable shaking during gear shifts
• Occasional slipping of the transmission
• Increased noise from the transmission area

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Tools Required

• OBD-II scanner
• Transmission fluid dipstick (if needed)
• Fluid transfer pump
• 10mm and 12mm sockets
• Torque wrench
• Funnel
• Clean shop rags
• Torque specifications chart
• Service manual for specific torque specs and procedures

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Repair Instructions

Step 1: Transmission Fluid Change (if necessary)

1. Locate the Transmission Drain Plug:

   • Raise the vehicle securely using jack stands.
   • Place a drain pan under the transmission.

2. Drain the Fluid:

   • Remove the drain plug using the appropriate socket. Allow the fluid to completely drain.

3. Replace the Filter (if applicable):

   • Remove the transmission pan bolts (typically 10mm or 12mm).
   • Carefully lower the pan and remove the old filter.
   • Install the new filter and replace the transmission pan, tightening the bolts to the specified torque.

4. Fill with New Fluid:

   • Use a funnel to fill the transmission with the recommended type and amount of transmission fluid (check owner’s manual for specifications).

Step 2: TCM Software Update

1. Check for Updates:

   • Connect the OBD-II scanner and check for any available software updates for the TCM.

2. Perform the Update:

   • Follow the manufacturer’s instructions to update the TCM if an update is available.

Step 3: Reset Transmission Adaptations (if necessary)

1. Disconnect the Battery:

   • Disconnect the negative battery terminal for approximately 15 minutes. This can reset the TCM and relearn shift patterns.

2. Reconnect the Battery:

   • Reconnect the negative battery terminal and start the vehicle. Allow it to idle and then take it for a test drive to allow the TCM to relearn.

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Post-Repair Test

• After repairs are completed, perform another road test to ensure the shudder has been resolved. Pay attention to how the vehicle shifts and accelerates.

Conclusion

If the transmission shudder persists after these steps, the issue may be more complex, potentially involving internal transmission components or the torque converter. In such cases, it may be necessary to consult a professional technician or transmission specialist for further diagnosis and repair.