Drive Unit - Rear - 3DU - Remove And Install: Remove

Remove the rear subframe assembly. See SUBFRAME ASSEMBLY - REAR (3DU) (REMOVE AND INSTALL) .
Release the clip that attaches the rear drive unit inlet hose to the HV harness bracket, and then remove the hose from the rear subframe assembly.

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Remove the bolt that attaches the rear drive unit HV harness bracket to the rear drive unit.
Tip:

Use of the following tool(s) is recommended:
- 10 mm socket
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Slide the release to unlock the rear drive unit HV connector handle of the rear drive unit to HV battery harness from the secured position.

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Fully raise the handle on the rear drive unit HV connector.

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Disconnect the rear drive unit HV connector from the rear drive unit HV header, and then remove the cable from the assembly.
If the rear drive unit is being replaced, continue to the next step. If the drive unit is not being replaced, skip to step 9.
Perform rear drive unit diode test.
NOTE: Verify the rear drive unit HV cable is disconnected from the HV battery. Use a multimeter in diode mode, with the positive DMM probe to the B- of the inverter and the negative probe to the B+. Pin #1 on HV cables is B- and Pin #2 is B+. MOSFET acceptable diode reading is 1.0V-2.0V. IGBT acceptable diode reading is 0.45V-2.0V. If the result for a reading is OL or the reading is greater than 2V, verify the probes are installed correctly.
Remove the bolt that attaches the ground strap harness to the rear drive unit, and then remove the harness from the assembly.
Tip:

Use of the following tool(s) is recommended:
- 10 mm socket
- 4 in extension
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Remove the bolt that attaches the rear LH ABS wheel speed sensor to the knuckle, and then remove the sensor from the knuckle.
Tip:

Use of the following tool(s) is recommended:
- 10 mm socket
- 6 in extension
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Release the grommet that attaches the rear LH ABS wheel speed sensor cable to the rear knuckle.

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Remove the bolt and nut that attach the LH rear upper aft link to the knuckle.
Tip:

Use of the following tool(s) is recommended:
- 21 mm socket
- 6 in extension
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Remove the bolt and nut that attach the LH upper fore link to the knuckle.
Tip:

Use of the following tool(s) is recommended:
- 21 mm socket
- 6 in extension
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Remove the bolt and nut that attach the LH rear toe link to the knuckle.
Tip:

Use of the following tool(s) is recommended:
- 18 mm socket
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Disconnect the electrical harness from the inverter low voltage connector.
CAUTION: Move the low voltage connector away from the coolant manifold to prevent that coolant is spilled onto the connector during inverter removal.

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Release the clip that attaches the low voltage electrical harness to the inverter.

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Release the clips that attach the resolver electrical harness to the rear drive unit, and then disconnect the electrical connector.

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Repeat step 10 through step 14 for the RH side of the vehicle.
Position the axle remover cable around the inner joint of the LH rear drive unit halfshaft, and then use a cable tie to hold the axle remover cable in position.
Axle removed from drive unit for demonstration purposes

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Hook the axle remover slide hammer on the 2 axle remover cable loops, and then use the slide hammer to release the halfshaft from the drive unit.
With assistance, remove the LH rear drive unit halfshaft from the rear drive unit, and then install a halfshaft plug into the opening of the gearbox.
Repeat step 19 through step 21 for the RH rear drive unit halfshaft.
Attach the drive unit sling tool to the rear drive unit.
Position the drive unit stand underneath the gantry.
Attach the drive unit sling tool to the gantry.
Raise the sling tool so that there is a slight tension on the cables.
Remove the bolt that attaches the LH mount of the rear drive unit to the rear subframe.
Tip:

Use of the following tool(s) is recommended:
- 18 mm socket
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Remove the bolt that attaches the RH mount of the rear drive unit to the rear subframe.
Tip:

Use of the following tool(s) is recommended:
- 18 mm socket
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Remove the bolt that attaches rear of the rear drive unit to the rear subframe.
Tip:

Use of the following tool(s) is recommended:
- 18 mm socket
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Raise the drive unit sling tool to lift the rear drive unit out of the rear subframe.
Move the subframe and lifting tool from beneath the drive unit.
Position a coolant catcher container beneath the rear drive unit assembly, and then lower the drive unit assembly to hover over the container.
Release the clip that attaches the inverter-to-cooler hose to the inverter, and then remove the hose from the inverter.

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Release the clips that attach the inverter-to-cooler hose to the rear drive unit.

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Release the clip that attaches the inverter-to-cooler hose to the cooler, and then remove the hose from the assembly.

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Release the clips that attach the coolant outlet hose to the rear drive unit.

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Release the spring clip that attach the coolant outlet hose from the rear drive unit heat exchanger, and then remove the hose from the rear drive unit.

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Remove the coolant catcher container from beneath the rear drive unit assembly.
Position an empty drive unit crate below the rear drive unit.
Lower the rear drive unit into the empty crate or pallet.
Remove the drive unit sling tool from the rear drive unit.

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