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brakes shuttering

slimfitz

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City, State
NJ
Year, Model & Trim Level
06 Limited
Hello all. I just purchased my wife a 2006 Explorer a few weeks ago. Everything works as it should. My only issue is that when coming to a stop at around 1mph the brakes shutter. It almost seems as if the calipers release then reapply pressure. But again it is only at very slow speeds. Other than that the brakes work great. This thing will stop on a dime compared to my superduty. This is going to drive me crazy. Has anybody else experienced this? Thanks
 



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There is a thing called "creep groan" in the braking industry. This is most common when you are at a stop, and partially release the brake (but not all the way) so you can "creep" forward. The resulting low-rpm stick-slip action between the pads and rotor can cause a "groooooan"ing sound. Sometimes, you might get the same sounds right at the end of a stop, like you are talking about.

Honestly, there isn't much you can do about it, other than changing that interface. This involves changing the pads or rotors, or modifying the pads. Our pads have no leading edge chamfer, so you could try sanding in a chamfer. The leading edges are the edges that the rotor rotates into when in the forward direction. I just replaced my front pads, and was surprised that even the Wagner ThermoQuiets have no chamfers. I intended to add a chamfer, but I forgot.

Just remember that adding a chamfer reduces the surface area contacting the rotor, which will slightly reduce braking performance. So don't overdo it.
 






I do not hear any sounds when this happens. I dont really know how to describe it. Its like it pops and allows the vehicle to roll for a split second. Then it will finish coming to a stop. I was thinking that maybe a the front rotors were warped but there is no pedal pulse or anything. It is enough to cause the whole car to jump when it does it. I can see what your talking about and maybe that is what is happening. I guess it wouldnt be to trouble to grind a ramp onto the pads and give it a try.
 






Hello all. I just purchased my wife a 2006 Explorer a few weeks ago. Everything works as it should. My only issue is that when coming to a stop at around 1mph the brakes shutter. It almost seems as if the calipers release then reapply pressure. But again it is only at very slow speeds. Other than that the brakes work great. This thing will stop on a dime compared to my superduty. This is going to drive me crazy. Has anybody else experienced this? Thanks

is this a v8? v8 i think you might feel a bump from the trans where it lunges forward, or you could have a broken abs ring causing abs to go off at low speeds.
 






is this a v8? v8 i think you might feel a bump from the trans where it lunges forward, or you could have a broken abs ring causing abs to go off at low speeds.

Yes it is a V8. Why would the trans lunge fwd?
 












It's part of a problem described in a TSB. You need to get your tranny reprogrammed.

TSB 8-24-4

Publication Date: November 20, 2008

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.



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



Verify that the TCM Calibration shows 8L2P-7J104-AC, (8L2P-7J104-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.

Clear TCM keep alive memory (KAM) and adaptive tables.
Using IDS:
Open Toolbox.
Choose Powertrain.
Choose Reset KAM.
Then Choose TCM.
Using PDS:
Choose all Tests and Calibrations.
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.



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.



Drive unit to perform adaptive shift strategy learn.
Accelerate from rest with light throttle to 15 MPH (24 Km/h), remove foot from accelerator pedal.
Brake very gently to a complete stop (allow at least six (6) seconds).
Repeat steps (a-b) five (5) times in the dealership parking lot or similar setting.
Accelerate from rest with light throttle. The 1-2, 2-3, and 3-4 shifts occur at engine speeds between 1700-2000 RPM.
Continue to accelerate gently to 50 MPH (80 Km/h) or the 5-6 upshift.
Brake gently to a complete stop and hold foot on brake for at least ten (10) seconds.
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
 






Thank you guys. I just read all 15 pages of the other thread. I guess I will be setting up an apt to get this taken care of. I really hope that it will hold up long term.
 






Good catch, guys.
 






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