Symptoms - Rear Differential Carrier
|
|
Symptoms - Rear Differential Carrier
|
|
Strategy Based Diagnostics
|
Review the system operation in order to familiarize yourself with the system functions. Refer to
Differential Carrier Assembly Description
. 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
.
|
Visual/Physical Inspection
|
|
•
|
Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
|
|
•
|
Check for the correct lubricant level and the proper viscosity.
|
|
•
|
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 and sound (if applicable) with a vehicle known to be in good condition. Ensure you do not try to correct a normal state.
|
|
•
|
Inspect for all-wheel drive activation and operation.
Factors that may contribute to an inoperative rear differential include:
|
|
|
-
|
Differential inoperative due to antilock brake system (ABS) function
|
|
|
-
|
Inoperative engine control module (ECM) and/or wiring system
|
|
|
-
|
A mini-spare or different size tire installed
|
|
|
-
|
A fluid over-temperature condition
|
|
|
-
|
An inoperative or "stuck" clutch pump check valve
|
|
|
-
|
A defective rear differential assembly
|
|
|
-
|
An inoperative transfer case assembly
|
|
•
|
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
.
|
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:
