2025-01-14

Front Drive Unit Assembly - Gearbox Fluid (Drain and Fill) (Remove and Replace)

Correction code 39300102 FRT 0.54 NOTE: Unless otherwise explicitly stated in the procedure, the above correction code and FRT reflect all of the work required to perform this procedure, including the linked procedures. Do not stack correction codes unless explicitly told to do so. NOTE: See Flat Rate Times to learn more about FRTs and how they are created. To provide feedback on FRT values, email LaborTimeFeedback@tesla.com. NOTE: See Personal Protection to make sure wearing proper PPE when performing the below procedure.

  • 2025-01-14: Noted that additional diagnosis may be necessary if over 300 mL of fluid was added.
  • 2025-01-06: Added note to record the amount of fluid added.
  • 2024-12-23: Added note that Cybertruck drive unit gearbox fluid drain procedures are under development.
Warning IconA warning icon, calling your attention to a possibly risky situation
Warning
This procedure is a DRAFT. Although it has been validated, Warnings and Cautions might be missing. Follow safety requirements and use extreme caution when working on or near High Voltage systems and components. Provide corrections and feedback to ServiceDevelopment@teslamotors.com.

Drain

Informational PurposesAn informational icon, calling your attention
Note
Cybertruck drive unit gearbox fluid drain procedures are under development. If low drive unit gearbox fluid is suspected, perform the "Refill" section below to top off the fluid.

Refill

  1. Raise and support the vehicle on a 2 post lift. See Raise Vehicle - 2 Post Lift.
  2. Open the LH front door and lower the LH front window.
  3. Remove the front aeroshield. See Undertray - Front Aeroshield (Remove and Install).
  4. Position a fluid catcher under the Front Drive Unit (FDU).
  5. Remove the oil fill plug from the FDU.
    15 Nm (11.1 lbs-ft)
    Informational PurposesAn informational icon, calling your attention
    TIp
    Use of the following tool(s) is recommended:
    • 8 mm Allen
    Informational PurposesAn informational icon, calling your attention
    Note
    Verify the O-ring is not damaged. Replace the O-ring as needed.
  6. Inspect the oil fill plug O-rings. If it is damaged, replace the oil fill plug.
  7. Release the clips (x2) that attach the RH side of the acoustic cover to the lower portion of the acoustic cover.
  8. Release the clips (x2) that attach the RH side acoustic cover to the FDU.
    Informational PurposesAn informational icon, calling your attention
    Note
    Route the caustic cover between the front subframe and the halfshaft.
  9. Set up fill kit with KAF1.
    Informational PurposesAn informational icon, calling your attention
    Note
    Add extra fluid to container as it will prevent underfill and additional air being injected.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    CAUTION
    Only use KAF1 fluid for the front drive unit. Do not interchange or mix fluid types.
  10. Position the oil pump hose into the FDU fill hole.
  11. Pump fluid into the FDU until fluid spills out of the fill hole.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    CAUTION
    If over 300 mL of gearbox fluid was added to the drive unit, additional diagnosis may be needed.
    Informational PurposesAn informational icon, calling your attention
    Note
    Note in the Service Visit the amount of fluid added to the drive unit.
  12. Remove the oil pump hose from the FDU fill hole.
    Informational PurposesAn informational icon, calling your attention
    Note
    Turn off the valve, and then remove the hose from the fill hole.
  13. Spray the area with brake cleaner and wipe any residual fluid.
  14. Fasten the clips (x2) that attach the RH side acoustic cover to the FDU.
    Informational PurposesAn informational icon, calling your attention
    Note
    Route the cover between the front subframe and the halfshaft.
  15. Fasten the clips (x2) that attach the RH side acoustic cover to the lower portion of the acoustic cover.
  16. Install the oil fill plug onto the FDU.
    15 Nm (11.1 lbs-ft)
    Informational PurposesAn informational icon, calling your attention
    TIp
    Use of the following tool(s) is recommended:
    • 8 mm Allen
    Informational PurposesAn informational icon, calling your attention
    Note
    Verify the O-ring is not damaged. Replace the O-ring as needed.
  17. Remove the fluid catcher from underneath the vehicle.
  18. Install the front aeroshield. See Undertray - Front Aeroshield (Remove and Install).
  19. Remove the vehicle from the lift. See Raise Vehicle - 2 Post Lift.
  20. Raise the LH front window and close the LH front door.