GRUNT/CREAK/SQUEAK/CHIRP NOISE FROM THE LOWER CONTROL ARM BUSHING OVER BUMPS - BUILT ON OR BEFORE 8/3/2009
Publication Date: December 2, 2009
Some 2005-2010 Mustang 4.0L/4.6L, 2007-2010 Mustang Shelby GT500 vehicles built on or before 8/3/2009 may exhibit a grunt/creak/squeak/chirp noise from the lower control arm hydro bushing. The grunt/creak noise may occur over large vertical bumps like speed bumps and pot holes. The squeak/chirp noise may occur over bumps rough roads, and driveway approaches.
Follow the Service Procedure steps to correct the condition.
Use chassis ears on the lower control arm hydro bushing bracket tabs to verify noise is coming from the hydro bushing.
If the noise is confirmed, then proceed to Step 2.
If the noise is not confirmed, then this procedure does not apply. Proceed with normal Workshop Manual (WSM) diagnostics.
Late production lower control arms were equipped with a 0.75" (19 mm) ball joint shaft and improved hydro bushing. Early production vehicles used an 0.71" (18 mm) ball joint shafts. Using a suitable caliper measure the ball joint shaft.
If the measurement is 0.75" (19 mm) this procedure does not apply and follow normal diagnostics in WSM Section 100-04.
If the ball joint shaft measures 0.71" (18 mm) an improved service lower control arm with improved hydro bushing is available. Follow WSM section 204-01 to replace.
Arm Asy-Front Suspension - Right Hand (Excludes GT 500)
Arm Asy-Front Suspension - Left Hand (Excludes GT 500)
Arm Asy-Front Suspension - Right Hand (GT 500)
Arm Asy-Front Suspension - Left Hand (GT 500)
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: Replace One (1) Lower Control Arm, Includes Time To Diagnose (Do Not Use With Any Other Labor Operations)
2005-2010 Mustang: Replace Two (2) Lower Control Arms, Includes Time To Diagnose (Do Not Use With Any Other Labor Operations)