05/04/2024 12:25:50

Gearbox Fluid - Rear Drive Unit (4DU) (Drain and Refill)

Correction code 40300122 0.42 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.

  • 2024-04-05: Removed caution to not mix fluids as unnecessary.
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.
  • 1139126-00-A KIT, DRIVE UNIT OIL FILL, MODEL 3

Drain

  1. Move the vehicle to a 2 post lift. See Raise Vehicle - 2 Post Lift.
  2. Remove the mid aero shield panel. See Panel - Aero Shield - Mid (Remove and Replace).
  3. Remove the fill plug from the rear drive unit gearbox.
  4. Pull the red tab, and then pull the red tab again to disconnect the rear subframe harness from the rear drive unit oil pump connector.
  5. Position an oil drain collector under the rear drive unit oil pump.
  6. Remove the drain plug from the rear drive unit gearbox.
  7. Connect the jump pack 12V power supply to the oil pump switchbox harness.
  8. Connect the oil pump switchbox harness to the rear drive unit oil pump connector, and then push in the connector locking tab.
  9. Run the oil pump for 1 minute to drain the remaining gearbox fluid from the rear drive unit.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    CAUTION
    The pump speed increases when it runs dry, do not run the pump for more than 10 seconds when it is dry.
  10. Pull the connector locking tab, and then disconnect the oil pump switchbox harness from the rear drive unit oil pump connector.
  11. Inspect the condition of the fill and drain plugs, and replace the O-rings if they are damaged.
  12. Install the drain plug into the rear drive unit gearbox.
    15 Nm (11.1 lbs-ft)
  13. Connect the rear subframe harness to the rear drive unit oil pump connector, and then push in the red tab to secure the connector.

Refill

  1. Fill a 3000mL measuring container with 2.5L/2500mL of KAF1 gearbox fluid.
    Informational PurposesAn informational icon, calling your attention
    Note
    The rear drive unit requires 2.3L/2300mL of fluid, however the excess fluid will prevent underfill and air entrapment.
  2. If not already the correct length, trim the fluid transfer pump hoses to 26 in (660mm) each.
  3. Install the hoses onto the fluid transfer pump.
  4. Place the measuring container and the fluid transfer pump into the oil drain basket.
  5. Insert the output hose of the fluid transfer pump into the fill hole of the rear drive unit until fully seated, then pull back 5 mm.
  6. Fully submerge the input hose of the fluid transfer pump into the measuring container.
  7. Pump 2.3L/2300mL of KAF1 gearbox fluid into the rear drive unit.
    Informational PurposesAn informational icon, calling your attention
    Note
    Make sure the input hose end remains submerged, so that air is not pumped into the gearbox.
    Informational PurposesAn informational icon, calling your attention
    Note
    When properly filled, there should be 200mL or less of gearbox fluid left in the measuring containter.
  8. Remove the output hose from the rear drive unit and install the fill plug.
    15 Nm (11.1 lbs-ft)
  9. Put on face shielding PPE.
  10. Spray the working area of the rear drive unit with brake cleaner, and then wipe off residual fluid with a clean shop towel.
  11. Move the oil drain collector out from under the rear drive unit.
  12. Install the mid aero shield panel. See Panel - Aero Shield - Mid (Remove and Replace).
  13. Remove the vehicle from the 2 post lift. See Raise Vehicle - 2 Post Lift.