5.0L - PISTON RATTLE IN COLD AMBIENT TEMPERATURES BELOW 10 DEGREES CELSIUS (50 DEGREES FAHRENHEIT) - BUILT ON OR AFTER 8/17/2010
Publication Date: July 1, 2011
Some 2011 Mustang vehicles equipped with a 5.0L engine and built on or after 8/17/2010 may exhibit a piston rattle noise in cold ambient temperatures of 10 degrees Celsius (50 degrees Fahrenheit) and below. The noise normally occurs in the 2000-3500 RPM range and will decrease as engine temperature warms up. An update of the powertrain control module (PCM) calibration to reduce intensity and duration of the noise is now available.
Reprogram the PCM to the latest calibration using IDS release 73.04 or later. This new calibration is not included in the VCM 2011.5 DVD. Calibration files may also be obtained at www.motorcraft.com.
PLEASE ADVISE THE CUSTOMER THAT THIS VEHICLE IS EQUIPPED WITH AN ADAPTIVE TRANSMISSION SHIFT STRATEGY WHICH ALLOWS THE VEHICLE'S COMPUTER TO LEARN THE TRANSMISSION'S UNIQUE PARAMETERS AND IMPROVE SHIFT QUALITY. WHEN THE ADAPTIVE STRATEGY IS RESET, THE COMPUTER WILL BEGIN A RE-LEARNING PROCESS. THIS RE-LEARNING PROCESS MAY RESULT IN FIRMER THAN NORMAL UPSHIFTS AND DOWNSHIFTS FOR SEVERAL DAYS.
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.
2011 Mustang: Reprogram The PCM (Do Not Use With Any Other Labor Operations)