Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Engine, A/T Controls - Harsh Downshift When Stopping
2010 Mercury Mountaineer AWD V6-4.0LSECTION Engine, A/T Controls - Harsh Downshift When Stopping
TSB 11-5-5
05/10/11
4.0L/5R555 - HARSH DOWNSHIFT WHILE STOPPING
FORD:
2009-2010 Explorer Sport Trac, Explorer
MERCURY:
2009-2010 Mountaineer
ISSUE
Some 2009 and 2010 Explorer, Explorer Sport Trac and Mountaineer vehicles equipped with a 4.0L engine and 5R55S transmission may exhibit a harsh downshift while coming to a stop.
ACTION
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
Reprogram the powertrain control module (PCM) to the latest calibration using IDS release 72.04 and higher or 73.01 and higher. This new calibration is not included in the VCM 2011.5 DVD. Calibration files may also be obtained at the website.
NOTE
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.
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.
OPERATION DESCRIPTION TIME
110505A 2009-2010 Explorer, 0.3 Hr.
Mountaineer, And Explorer
Sport Trac 5R555
Transmission: Reprogram
The PCM (Do Not Use
With Any Other Labor
Operations)
DEALER CODING
CONDITION
BASIC PART NO. CODE
RECAL 04
Disclaimer
05/10/11
4.0L/5R555 - HARSH DOWNSHIFT WHILE STOPPING
FORD:
2009-2010 Explorer Sport Trac, Explorer
MERCURY:
2009-2010 Mountaineer
ISSUE
Some 2009 and 2010 Explorer, Explorer Sport Trac and Mountaineer vehicles equipped with a 4.0L engine and 5R55S transmission may exhibit a harsh downshift while coming to a stop.
ACTION
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
Reprogram the powertrain control module (PCM) to the latest calibration using IDS release 72.04 and higher or 73.01 and higher. This new calibration is not included in the VCM 2011.5 DVD. Calibration files may also be obtained at the website.
NOTE
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.
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.
OPERATION DESCRIPTION TIME
110505A 2009-2010 Explorer, 0.3 Hr.
Mountaineer, And Explorer
Sport Trac 5R555
Transmission: Reprogram
The PCM (Do Not Use
With Any Other Labor
Operations)
DEALER CODING
CONDITION
BASIC PART NO. CODE
RECAL 04
Disclaimer
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.