Felt like something just pushed my expy

[ezeq]

Hi, i was driving last night,red light ,i stop upon releasing the brake, i felt something just pushed my expy but no one behind me the fact that i didnt even press the gas pedal,it did twice.
Can someone please tell me just whats going on?

Thank you.



Expedition XLT 2007
75k mileage

 

[jjbusa]

Could be the iac valve is dirty my Explorer did it then I cleaned it and it went away

 

[RI-Matt]

Have you ever had the trans computer reflashed ? There was a TSB out that dealt with the "bump stop" situation = when coming to a stop it felt as if you were getting rear ended.

Should be TSB 08-22-7

Your dealer can check if you have the latest program and if not they should only charge about an 1 hr time to reprogram TCM.



Matt

 

[ezeq]

Thanks guys but please give me more about that info matt regarding about that TSB/ reflashing the TCM.
Ty

 

[RI-Matt]

Thanks guys but please give me more about that info matt regarding about that TSB/ reflashing the TCM.
Ty

Here is the info on that TSB.

TSB 08-22-7

DRIVELINE BUMP WHILE BRAKING - BELOW 10 MPH (16 KM/H)
FORD:
2007-2008 Expedition

This article supersedes TSB 08-4-13 to update the Issue, Service Procedure and remove the production fix date.
ISSUE
Some 2007-2008 Expedition vehicles may exhibit a bump feeling while braking to a stop below 10 MPH (16 Km/h). This procedure will improve the bump felt while braking to a stop.

ACTION
Follow the Service Procedure steps to correct the condition.

SERVICE PROCEDURE
CAUTION APPLYING THIS PROCEDURE TO UNITS THAT DO NOT EXHIBIT THE COASTDOWN BUMP MAY RESULT IN WORSE SHIFT QUALITY.

NOTE DO NOT ATTEMPT TO REPLACE THE MECHATRONIC UNIT. MECHATRONIC REPAIR/REPLACEMENT IS NOT AUTHORIZED FOR THIS ISSUE.

1. Install Integrated Diagnostic System/Portable Diagnostic Software (IDS/PDS) or equivalent and ID the vehicle.

2. Update the Power Control Module/Transmission Control Module (PCM/TCM) calibration using IDS release 57.8 and higher or 58.1 and higher. This new calibration is not included in the VCM 2008.9 DVD. Calibration files may also be obtained at the website. Since the TCM cannot be independently reprogrammed, reprogram the PCM to ensure that engine and transmission calibrations are updated to the latest level simultaneously.

a. Verify that the TCM shows 8L1P-7J104-AC (8L1P-7J104-BC for 2008 vehicles built after 12/3/2007) part number after reprogramming is complete.

b. Select the following from IDS, Tool Box, 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.

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.

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) a total of five (5) times in the dealership parking lot or similar setting.

d. Accelerate from rest with light throttle ensuring that the 1-2, 2-3 and 3-4 shifts occur at engine speeds between 1300-1800 RPM.

e. Continue to accelerate until you achieve 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 10 seconds.

g. Repeat steps (e-f) three (3) times.

NOTE THE HARSH BUMP FELT WHILE BRAKING TO A STOP WILL BE IMPROVED. HOWEVER, SEVERAL DAYS OF DRIVING ARE 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

082207A 2007-2008 Expedition: 1.0 Hr.
Check DTCs, Reprogram
The PCM And TCM,
Includes Time To Clear
KAM And Perform Road
Test. Authorization Decal
Not Required (Do Not Use
With 12650D)




Matt

 

[ezeq]

Thank you.