2026-04-06

Gearbox Fluid - Rear Drive Unit (Tri-Motor) (Drain and Refill) (Maintenance)

Correction code 40300112 0.66 NOTE: Unless otherwise explicitly stated in the procedure, the correction code and FRT listed above 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. NOTE: See Personal Protection to make sure you are wearing proper PPE when performing the procedure below. NOTE: See Ergonomic Precautions for safe and healthy working practices.

  • 2026-04-06: Added procedure for drain and fill.
  • 2024-12-23: Removed drive unit fluid drain procedure.
  • 2024-10-02: Removed note specifying 200 mL minimum of fluid during refill step to align with validation.
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.

Cybertruck drive unit gearbox fluid drain procedures are under development. If low drive unit gearbox fluid is suspected, perform Gearbox Fluid - Rear Drive Unit (Tri Motor) (Top Off).

Procedure

  1. Open the LH front door and lower the LH front window.
  2. Raise and support the vehicle. See Raise Vehicle - 2 Post Lift.
  3. Remove the rear skid plate. See Skid Plate - Rear (Remove and Install).
  4. Remove the rear aero shield. See Aeroshield - Rear (Remove and Install).
  5. Position an oil drain container underneath the rear drive unit.
  6. Remove the oil fill plug from the rear drive unit.
    Informational PurposesAn informational icon, calling your attention
    TIp
    Use of the following tool(s) is recommended:
    • 8 mm hex
  7. Remove the oil drain plug from the rear drive unit and allow the fluid to drain.
    Informational PurposesAn informational icon, calling your attention
    TIp
    Use of the following tool(s) is recommended:
    • 8 mm hex
  8. Install oil drain plug onto rear drive unit.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    CAUTION
    Assemble tools and set torque wrench to 11 Nm. Specified tools must be used for this torque setting.
    Informational PurposesAn informational icon, calling your attention
    Note
    Make sure the O-ring is not damaged, and replace as needed.
    Informational PurposesAn informational icon, calling your attention
    TIp
    Use of the following tool(s) is recommended:
    • 8 mm hex
  9. Connect a laptop with Toolbox to the vehicle. See Toolbox 3 (Connect and Disconnect).
  10. Run ODIN routine PROC_DIX_X_OIL-PUMP-DRAIN-CONTROLvia Toolbox:(link).
    Informational PurposesAn informational icon, calling your attention
    Note
    Select RDU. Run action and allow oil to drain.
  11. Set up the fill kit with KAF1.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    CAUTION
    Only use KAF1 fluid. Do not interchange or mix oil types.
    Informational PurposesAn informational icon, calling your attention
    Note
    Fill the oil container generously to prevent underfill and additional air being injected.
  12. Position the oil pump hose into the fill hole.
  13. Gradually pump fluid into the rear drive unit fluid spills from the fill port, and then note the amount of fluid added.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    CAUTION
    Only use KAF1 fluid. Do not mix oil types.
    Informational PurposesAn informational icon, calling your attention
    Note
    If more than 400mL is added, escalate a Toolbox session.
  14. Remove the oil pump hose from fill port.
    Informational PurposesAn informational icon, calling your attention
    Note
    Slide the handle to the off position.
  15. Install the oil fill plug onto the rear drive unit.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    CAUTION
    Assemble tools and set torque wrench to 11 Nm. Specified tools must be used for this torque setting.
    Informational PurposesAn informational icon, calling your attention
    Note
    Make sure the O-ring is not damaged, and replace as needed.
    Informational PurposesAn informational icon, calling your attention
    TIp
    Use of the following tool(s) is recommended:
    • 8 mm hex
  16. Spray the area with brake cleaner and wipe any residual fluid.
  17. In Toolbox, click the Actions tab, and then search for "Oil Pressure".
  18. Run ODIN routine TEST-SELF_DIF_X_OIL-PUMP-PRESSUREvia Toolbox:(link)
  19. Remove oil drain from underneath vehicle.
  20. Install the rear aero shield. See Aeroshield - Rear (Remove and Install).
  21. Install the rear skid plate. See Skid Plate - Rear (Remove and Install).
  22. Remove the vehicle from the lift. See Raise Vehicle - 2 Post Lift.
  23. Raise the LH front window and close the LH front door.