This article supersedes TSBs 8-21-6 to update the vehicle model years.
Some 2005-2010 Mustang vehicles may exhibit excessive axle whine noise.
Follow the Service Procedure steps to correct the condition.
This condition may be corrected by installing tuned dampers on the rear axle assembly, if not already installed.
Check the rear axle assembly for the presence of tuned dampers. (Figures 1-2)
Figure 1 - Article 09-20-4
Figure 2 - Article 09-20-4
If not present, then install tuned dampers. Refer to the installation instruction sheet included in the damper kit.
NO DRILLING IS REQUIRED IF DAMPER MOUNTING HOLES ARE PRESENT. VEHICLES BUILT AFTER 11/15/2004 ALREADY HAVE THE REQUIRED DAMPER MOUNTING HOLES.
If whine noise persists, then continue with normal diagnostics per Workshop Manual, Section 205-00.
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.
2005-2010 Mustang: Install Axle Damper Kit Includes Time To Drill Holes If Necessary (Do Not Use With Any Other Labor Operations)