my Skoda Octavia NFL (2020-Present) transmission jerks when shifting gears

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, multimeter, transmission fluid.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to prevent electrical shorts while working on the TCM.

2. Transmission Fluid Inspection and Replacement

1. Check Fluid Level:
   • Remove the transmission dipstick (if applicable).
   • Use a clean rag to check the fluid level and condition.
   • If low, add the specified transmission fluid.
2. Drain Old Fluid:
   • Position a catch pan under the transmission pan.
   • Remove the transmission pan bolts using a socket set.
   • Allow old fluid to drain completely.
3. Replace Fluid:
   • Install a new transmission filter if applicable.
   • Reinstall the transmission pan and torque bolts to the manufacturer’s specifications.
   • Refill with the correct type of transmission fluid through the dipstick tube.

3. TCM Inspection and Reprogramming

1. Access TCM:
   • Locate the TCM (usually under the dashboard or near the transmission).
   • Disconnect the wiring harness from the TCM carefully.
2. Test TCM:
   • Use a multimeter to check the power and ground connections.
   • If faulty, replace the TCM with a new unit.
3. Reprogram TCM:
   • Use an OBD-II scanner to reprogram the new TCM according to the manufacturer’s specifications.

4. Final Assembly and Testing

1. Reassemble Components:
   • Reconnect all connectors and bolts securely.
2. Reconnect Battery:
   • Ensure all tools are removed from the engine bay.
   • Reconnect the battery terminals.
3. Test Drive:
   • Conduct a test drive to ensure smooth shifting and normal operation.