how to tell if my Tesla Outback 5th Generation (2015-2019) transfer case is failing

Subaru Outback 5th Generation (2015-2019)

Error Codes

2-4 hours

Time

hard

Difficulty

high

Severity

4 min read

611 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix transfer case issues in Tesla Outback 5th Generation (2015-2019). Step-by-step guide with symptoms and repair instructions.

Affected Component

Transmission

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Ensure the vehicle is securely lifted and supported before working underneath.

Symptoms

•Unusual noises from the transfer case area (grinding or whining)
•Difficulty engaging or disengaging all-wheel drive
•Warning lights illuminated on the dashboard
•Vibration felt during acceleration or deceleration
•Fluid leaks under the vehicle
•Decreased traction in slippery conditions

Diagnostic Steps

1
Inspect for any visible fluid leaks around the transfer case.
2
Check the transfer case fluid level and condition; look for discoloration or metal shavings.
3
Use an OBD-II scanner to check for any stored error codes related to the transfer case or drivetrain.
4
Conduct a road test to assess the engagement of all-wheel drive and listen for abnormal sounds.
5
Inspect the transfer case mounting points and surrounding components for signs of wear or damage.
6
Measure the output shaft play with a dial gauge to check for excessive wear.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Fluid pump
•Socket set
•Torque wrench
•Mechanic's stethoscope

Parts Required

•Transfer case fluid
•Transfer case gasket or seal (if replacing the transfer case)

Related Faults

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Diagnostic Steps

1
Inspect for any visible fluid leaks around the transfer case.
2
Check the transfer case fluid level and condition; look for discoloration or metal shavings.
3
Use an OBD-II scanner to check for any stored error codes related to the transfer case or drivetrain.
4
Conduct a road test to assess the engagement of all-wheel drive and listen for abnormal sounds.
5
Inspect the transfer case mounting points and surrounding components for signs of wear or damage.
6
Measure the output shaft play with a dial gauge to check for excessive wear.

Solution

1. Preparation

Gather necessary tools and materials.
Ensure the vehicle is on a level surface and secure it with wheel chocks.
Disconnect the battery to prevent electrical shorts.

2. Fluid Change

Tools Required: Fluid pump, drain pan, socket set.
Sub-steps:
1. Place the drain pan under the transfer case.
2. Remove the drain plug and allow the old fluid to completely drain.
3. Inspect the drained fluid for metal shavings or contaminants.
4. Replace the drain plug with a new washer and torque to manufacturer specifications.
5. Remove the fill plug and use a fluid pump to add new transfer case fluid until it reaches the fill level.

3. Noise Inspection

Tools Required: Mechanic's stethoscope or similar listening device.
Sub-steps:
1. With the vehicle running, place the stethoscope against the transfer case while an assistant engages the all-wheel drive.
2. Listen for any abnormal noises such as grinding or excessive whirring.
3. If noises are detected, further disassembly may be required to inspect internal components.

4. Component Inspection

Tools Required: Torque wrench, socket set, flashlight.
Sub-steps:
1. Visually inspect the transfer case mounts for cracks or wear.
2. Tighten any loose bolts to manufacturer specifications.
3. Look for damage to the driveshafts connected to the transfer case.

5. Replacement of Transfer Case (if necessary)

Tools Required: Socket set, transmission jack, torque wrench, sealant.
Sub-steps:
1. Support the transfer case with a transmission jack.
2. Remove the driveshafts connected to the transfer case.
3. Disconnect any electrical connectors and remove the mounting bolts.
4. Carefully lower the transfer case and replace with a new or refurbished unit, ensuring proper alignment.
5. Reattach driveshafts, electrical connectors, and fill with new fluid.