Symptoms - Transfer Case

Symptoms - Transfer Case

Strategy Based Diagnostics

Review the system operations in order to familiarize yourself with the system functions. Refer to Transfer Case Disassembled View Diagrams , Transfer Case Description and Operation Description and Operation , and Rear Drive Axle Description and Operation Rear Drive Axle. All diagnosis on 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 Strategy Based Diagnosis.

Visual/Physical Inspection

* Inspect for aftermarket devices, which could affect the operation of the vehicle. Refer to Checking Aftermarket Accessories Checking Aftermarket Accessories.
* Inspect the easily accessible or visible system components for obvious damage or conditions, which could cause the symptom.
* Inspect for the correct lubricant levels and the proper viscosities.
* Verify the exact operating conditions under which the concern exists. Note factors such as vehicle speed, road conditions, ambient temperature, and other specifics.
* Compare the driving characteristics or sounds, if applicable, to a known good vehicle and ensure you are not trying to correct a normal condition.

Intermittent

Test the vehicle under the same conditions that the customer reported in order to verify the system is operating properly.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

* Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle
* Noisy in Drive Noisy in Drive
* Noisy When Coasting Noisy When Coasting
* Intermittent Noise Intermittent Noise
* Constant Noise Constant Noise
* Transfer Case Leak Diagnosis Transfer Case Leak Diagnosis