Symptoms - Rear Differential Carrier
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Symptoms - Rear Differential Carrier
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Strategy Based Diagnostics
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Review the system operation in order to familiarize yourself with the system functions. See
Differential carrier assembly, description
All diagnostics for a vehicle should follow a logical process. Strategy based diagnostics is a uniform approach for repairing all systems. The diagnostic flow may always be used in order to resolve a system condition. The diagnostic flow is the place to start when repairs are necessary. For a detailed explanation, refer to
Strategy Based Diagnosis
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Visual/Physical Inspection
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Inspect for easily accessible or visible system components for obvious damage or conditions which may cause the symptom.
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Check for the correct lubricant level and the proper viscosity.
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Verify the exact operating conditions under which the concern exists. Note factors such as vehicle speed, road conditions, ambient temperature, and other specifics.
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Compare the driving characteristics or sounds, if applicable, to a known good vehicle. Make sure you are not trying to correct a normal condition.
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Inspect for all-wheel drive activation and operation.
Factors that may contribute to an inoperative rear differential include:
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Differential inoperative due to antilock brake system (ABS) function
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Inoperative engine control module (ECM) and/or wiring system
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A mini-spare or different size tire installed
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A fluid over-temperature condition
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An inoperative or "stuck" clutch pump check valve
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A defective rear differential assembly
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An inoperative transfer case assembly
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Sometimes it might be difficult to judge whether the noise is coming from the propeller shaft or rear differential carrier assembly. Refer to
Symptoms - Propeller Shaft
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Test the vehicle under the same conditions that the customer reported in order to verify the system is operating properly.
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom: