Escape 4WD V6-3.0L (2008)
Wheel Cylinder: All Technical Service Bulletins
Brakes - Rear Brake Rotational Chirp Noise
TSB 08-20-11
10/13/08
REAR BRAKE NOISE - ROTATIONAL CHIRP -
(EXCLUDES HYBRID)
FORD:
2008 Escape
MERCURY:
2008 Mariner
This article supersedes TSB 08-11-2 to update the Service procedure.
ISSUE
Some 2008 Escape and Mariner (Excludes Hybrid) vehicles may exhibit a noise from the rear brakes while coming to a stop. This condition does not
affect brake performance. The noise is typically described as a cyclic, scraping, or rotational chirp noise.
ACTION
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
To better determine if this procedure is applicable, be advised of the following characteristics:
^
The noise this procedure addresses is unlike a typical brake squeak.
^
It is often described as a groan noise or scraping noise which is cyclic and follows wheel speed.
^
Vehicles will usually exhibit the noise at speeds under 20 MPH (32 Km/h).
^
This noise will only be present when the brakes are very warm or hot such as experienced in stop and go traffic.
Vehicles built prior to 6/15/2007 follow both procedures A and B.
Vehicles built after 6/15/2007 perform only procedure B.
NOTE
PERFORMING PROCEDURE B IS THE MOST CRITICAL PART OF THIS REPAIR. ADDING LUBRICANT TO THE WHEEL CYLINDER
PISTONS WILL REDUCE FRICTION BETWEEN THE WHEEL CYLINDER PISTON AND ALUMINUM WHEEL CYLINDER WALL
ELIMINATING NOISE SOURCE.
PROCEDURE A
1.
Replace the rear brake shoes. Refer to Workshop Manual (WSM), Section 206-02.
2.
Apply Motorcraft® Silicone Brake Caliper Grease and Dielectric Compound to the contact points between the shoe and the rear backing plate.
Ensure grease will not contact brake lining surface.
PROCEDURE B
