A/T, Engine Controls - Low Speed Driveline Bump
TSB 08-24-412/08/08
DRIVELINE BUMP WHILE BRAKING - BELOW 10 MPH
(16 KM/H)
FORD:
2006-2008 Explorer
2007-2008 Explorer Sport Trac
MERCURY:
2006-2008 Mountaineer
This article supersedes TSB 08-4-16 to update the Service Procedure.
ISSUE
Some 2006-2008 Explorer, Mountaineer and 2007-2008 Explorer Sport Trac vehicles equipped with a 6R60 transmission may exhibit a bump feeling while braking to a stop less than 10 MPH (16 Km/h). The following procedure will improve the bump felt while braking to a stop.
ACTION
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
NOTE
DO NOT ATTEMPT TO REPLACE THE MECHATRONIC UNIT. MECHATRONIC REPAIR / REPLACEMENT IS NOT AUTHORIZED FOR THIS ISSUE.
1. Install Integrated Diagnostic System (IDS) / Portable Diagnostic Software (PDS) or equivalent and ID the vehicle.
2. Update the powertrain control module (PCM) and transmission control module (TCM) calibration using IDS release 57.11 and higher or 58.2 and higher. This new calibration is not included in the VCM 2008.11 DVD. Calibration files may also be obtained at the website. Since the TCM cannot be independently reprogrammed, reprogram the Programmable Module Installation (PMI) function to ensure that engine and transmission calibrations are updated to the latest level simultaneously.
NOTE
AUTHORIZATION DECAL NOT REQUIRED.
a. Verify that the TCM Calibration shows 8L2P-7J104-AC, (8L2P-7J 104-CC for builds after 12/3/2007) part number after reprogramming is complete.
Select the following from the IDS tool, Toolbox, Powertrain, OBD Test Modes, Mode Level 9 Vehicle Info, TCM Cal Part Number.
3. Clear TCM keep alive memory (KAM) and adaptive tables.
a. Using IDS:
(1) Open Toolbox.
(2) Choose Powertrain.
(3) Choose Reset KAM.
(4) Then Choose TCM.
b. Using PDS:
(1) Choose all Tests and Calibrations.
(2) Scroll down the menu and Choose Reset TCM KAM.
NOTE
FOR PDS, RESET TCM KAM IS NOT THE SAME AS CLEAR TRANSMISSION ADAPTIVE TABLES, WHICH IS UNDER THE POWERTRAIN - TRANSMISSION MENU TREE.
NOTE
UNHOOKING THE BATTERY WILL NOT CLEAR THE TCM KAM. IT IS CRITICAL THAT TCM KAM BE CLEARED PRIOR TO RELEARNING THE ADAPTIVE TABLES FOR THE TRANSMISSION.
NOTE
DO NOT CLEAR THE PCM KAM.
4. Verify that the transmission fluid temperature (TFT) PID is above 175° F (80° C). If it is not at 175° F (80° C), drive unit approximately 3 miles (5 Km) to reach temperature.
NOTE
TFT MUST BE AT 175° F (80° C) OR ABOVE BEFORE PROCEEDING TO STEP 5.
NOTE
PERFORM ADAPTIVE SHIFT STRATEGY LEARN ON LEVEL SURFACE ROAD.
5. Drive unit to perform adaptive shift strategy learn.
a. Accelerate from rest with light throttle to 15 MPH (24 Km/h), remove foot from accelerator pedal.
b. Brake very gently to a complete stop (allow at least six (6) seconds).
c. Repeat steps (a-b) five (5) times in the dealership parking lot or similar setting.
d. Accelerate from rest with light throttle. The 1-2, 2-3, and 3-4 shifts occur at engine speeds between 1700-2000 RPM.
e. Continue to accelerate gently to 50 MPH (80 Km/h) or the 5-6 upshift.
f. Brake gently to a complete stop and hold foot on brake for at least ten (10) seconds.
g. Repeat Steps (d-f) a total of three (3) times.
NOTE
THE HARSH BUMP FELT WHILE BRAKING TO A STOP WILL BE IMPROVED. HOWEVER, SEVERAL DAYS OF DRIVING MAY BE REQUIRED FOR THE TRANSMISSION TO FULLY ADAPT.
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
082404A 2006-2008 Explorer, 1.0 Hr.
Mountaineer 2007-2008
Explorer Sport Trac 6R60
Transmission: Check
DTCs, Reprogram The
PCM And TCM, Includes
Time To Clear KAM And
Perform Road Tests,
Authorization Decal Not
Required (Do Not Use
With 12650D)
DEALER CODING
CONDITION
BASIC PART NO. CODE
RECAL 04
Disclaimer