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, Transfer Case Description and Operation, and Rear Drive Axle Description and Operation. 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. Initial Inspection and Diagnostic Overview

Visual/Physical Inspection

* Inspect for aftermarket devices which could affect the operation of the vehicle. Refer to Checking Aftermarket Accessories in Diagnostic Aids. Component Tests and General Diagnostics
* Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
* Verify the exact operating conditions under which the concern exists. Note factors such as 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 Starting Point - Transfer Case
* Diagnostic Starting Point - Rear Drive Axle
* Noisy in Drive
* Noisy When Coasting
* Intermittent Noise
* Constant Noise