GRUNT/CREAK/CHIRP/SQUEAK NOISE FROM THE FRONT LOWER CONTROL ARM OVER BUMPS – BUILT ON OR BEFORE 8/1/2011
Publication Date: October 14, 2011
The article supersedes TSB 11-7-8 to update the production fix date and Part List.
Some 2011-2012 Mustangs vehicles built on or before 8/1/2011 may exhibit a grunt/creak/chirp/ squeak noise from the front lower control arm hydro bushing. These noises may occur over large vertical bumps like speed bumps, pot holes, 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. The hydro bushing is the large diameter bushing at the rear of the control arm.
If the noise is not confirmed as coming from the hydro bushing, do not continue with this article. Refer to Workshop Manual, Section 204-00 for normal diagnostics.
If the noise is confirmed as coming from the hydro bushing, replace the lower control arm that is making the noise. Refer to WSM, Section 204-01.
PART NUMBER PART NAME
CR3Z-3078-B Arm Assy – Right Front
CR3Z-3079-B Arm Assy – Left Front
W710141-S439 Lower Arm Rear Bolt
W709865-S439 Lower Arm Front Bolt
W710909-S439 Steering Gear Bolt
W711123-S439 Ball Joint Bolt
W520215-S440 Lower Arm Rear Nut
W520214-S440 Ball Joint Nut
W713882-S437 Rack Nut
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.
OPERATION DESCRIPTION TIME
111017A 2011-2012 Mustang: Replace One (1) Lower Control Arm, Includes Time To Diagnose (Do Not Use With Any Other Labor Operations) 1.2 Hrs.
111017B 2011-2012 Mustang: Replace Two (2) Lower Control Arms, Includes Time To Diagnose (Do Not Use With Any Other Labor Operations) 1.6 Hrs.
BASIC PART NO. CONDITION CODE