Suspension - Front End Grunt/Creak/Squeak/Chirp on Bumps

TSB 07-23-1

11/26/07

GRUNT/CREAK/SQUEAK/CHIRP NOISE FROM THE
LOWER CONTROL ARM BUSHING OVER BUMPS -
BUILT BEFORE 2/28/2007

FORD:
2005-2007 Mustang, Mustang

ISSUE
Some 2005-2007 Mustangs 4.0L/4.6L with a build date before 2/28/2007 may exhibit a grunt/creak/squeak/chirp noise from the lower control arm (LCA) hydro bushing over bumps like speed bumps, pot holes, rough roads, and driveway approaches.

ACTION
Follow the Service Procedure steps to correct the condition.

SERVICE PROCEDURE

1. Use chassis ears on the LCA hydro bushing bracket tabs to verify noise is coming from the LCA Bushing.

a. If noise confirmed, then proceed to step 2.

b. If not, then TSB does not apply. Proceed with normal Workshop Manual (WSM) diagnostics.

2. Replace LCA with latest level parts per WSM section 204-01.

WARRANTY STATUS: 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.





Parts Block

OPERATION DESCRIPTION TIME

072301A 2005-2007 Mustang 1.2 Hrs.
4.0L/4.6L Built Before
2/28/2007: Replace One
Lower Control Arm,
Includes Time To
Diagnose Using Chassis
Ears (Do Not Use With
3078A)

072301B 2005-2007 Mustang 1.5 Hrs.
4.0L/4.6L Built Before
2/28/2007: Replace Both
Lower Control Arms,
Includes Time To
Diagnose Using Chassis
Ears (Do Not Use With
3078A)

DEALER CODING
CONDITION
BASIC PART NO. CODE
3078 12





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