Drivetrain - Squeal Or Howl At Low Speeds When Cold
39 Squealing or howling noise from under vehicle at lower speeds and when cold
39 12 12
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152
June 12, 2012.
Supersedes Technical DIAGNOSIS AND REPAIR Group 39 number 12 - 10 dated March 7, 2012 for reasons listed below.
Affected Vehicles
Condition
Customer may report squealing or howling noise from under vehicle. This is usually with vehicle cold and at speeds from 5 - 40 mph.
Technical Background
Not applicable.
Production Solution
Lubrication of intermediate bearing was increased, and further clearance was achieved of the shaft extension.
Service
Verify the noise is coming from the intermediate bearing of the propeller shaft using chassis ears or similar listening device.
If noise is coming from the intermediate bearing, replace the propeller shaft following the procedure from ELSA.
Test drive and verify the noise is no longer present.
153
Warranty
Required Parts and Tools
Additional Information
All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service
manuals for the latest information.
