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1999-2007 General Questions General questions related to 1999-2007 Super Duty trucks. If it doesn't fit the other categories, post it here. Gas engine discussion that pertains to all models is allowed. Specific gas engine questions should use the Gas Engines forum.

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Old 06-28-2007, 05:13 PM   #1 (permalink)
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Brakes Pads are too hard says Ford

Has anyone heard of brake pads being too hard? I took my truck into the dealership today ( still under an extendacare ford bumper to bumper warranty) the brakes were pulling really hard to the right under aggressive braking. Normal braking ( light pressure) no problems, but if you really had to get on them they would pull bad.

Well just got a call from my friendly service adviser. He told me there aftermarket pads. DUH. I had a brake job done about 7K ago. He also informed me that the pads were too hard and thus causing the pull. I am throwing the BS flag on this. I believe the calipers may be bad, though they were checked and all appears well!? says the advisor. He also informed me that to replace rotors and do brakes for the front axle woud cost $800. I laughed at him and told him I will be picking up the truck this afternoon..

My question is would aftermarket pads that are too hard be causing this? if this is the case I will just re-mill the rotors and throw some ford genuine pads ( from sponsors so the don't cost so much)

Thoughts?
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Old 06-28-2007, 05:35 PM   #2 (permalink)
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Re: Brakes Pads are too hard says Ford

sounds to me like a caliper might be sticking.. if its pulling to the right i would check the left caliper an see if its working.. an check the pads on that side .. an see how they are wearing compared to the other side..you could put the pads from right to left an see if it switch's the pull but i would bet its the caliper
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Old 06-28-2007, 05:38 PM   #3 (permalink)
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Re: Brakes Pads are too hard says Ford

Change the pads to the other side and see if the pull follows the pads or stays the same. If it still pulls the same, you know it is the hose, caliper or slidepins.
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Old 06-28-2007, 06:10 PM   #4 (permalink)
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Re: Brakes Pads are too hard says Ford

The dealer may be having a knee jerk reaction to an old problem with the OE pads, where batch to batch friction was not as consistent as it needed to be on this vehicle, and therefore pulls would occur.

This vehicle is very sensitive to side to side running condition. If there is a temperature difference due to slight hangup, there will be a pull (it will go to the hot side). As mentioned, if there is a friction difference in one or two pads on one side of the vehicle, there will be a pull. And unfortunately, a few other situations too. The 99-04 vehicle's brakes need too much attention. Also your pull could be from the front or the rear.

First is the pull a hard snap right from the start of the brake application, or does it happen towards the end of the stop and drifts over. Drifts come from the rear brakes.

Unfortunately the common mechanic method of just removing the caliper and seeing if the slides work OK and the piston boots are OK doesn't OK the brake assembly. You also need to check if the pads are free in the brackets.

If the pads have been conditioned with more heat due to a slight hangup, they will still have higher friction and pull if the slides, brackets or other issues have been addressed. It's best to switch the pads side to side and see if the pull goes that way. If it stays to the switched side for more then a few days, then switch back only the outer pad. That usually clears things up if the pads are over conditioned.

If we get a pull on a test vehicle, will spend a few days trying these little things until we have found the root cause. Not sure if you are going to want to play that much.
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Old 06-28-2007, 11:59 PM   #5 (permalink)
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Re: Brakes Pads are too hard says Ford

I would go to Autozone and get there best brake pads about $80.00 bucks, rather than all that trouble switching, sure is a lot cheaper than $800.00 and all that work. You can check all of the above while replacing the pads.
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Old 06-29-2007, 12:02 AM   #6 (permalink)
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Re: Brakes Pads are too hard says Ford

I had problems with my 02 F350 dually pulling. A fresh brake job (pads and turned rotors) fixed it but only for a couple of weeks, then pulling again. Shortly there after got a brake (ABS) warning light. Was a sensor for one of the front wheels. After it was changed, no more pulling. I'm sure the sensor was screwing up all along, just not enough to set the light earlier in time.
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Old 06-29-2007, 02:03 PM   #7 (permalink)
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Re: Brakes Pads are too hard says Ford

Swapped pads last night from side to side. All calipers and hardware seemed in good working order. Today it does not seem to pull, though I have only driven mabye 25 miles on the switched pads. I will update if any more pulling occurs. Thanks
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Old 07-01-2007, 06:15 PM   #8 (permalink)
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Re: Brakes Pads are too hard says Ford


id ask the dealer how he MEASURED the hardness (durometer)
of the pads...and id ask him to SHOW you the measurement readings
so that he could ALSO do the same (demonstration) in front of
you w/ the "FORD" pads !

the dealer is FULL OF IT !
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Old 07-02-2007, 03:47 PM   #9 (permalink)
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Re: Brakes Pads are too hard says Ford

No reported pulling. Seemed the swapping of pads solved the issue. Must have been a bad seating of the pads when changed. All is well. thanks guys.
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Old 07-02-2007, 06:51 PM   #10 (permalink)
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Re: Brakes Pads are too hard says Ford

I wish I knew what I did with them, but I had images of test days of an F-150 that developed a brake pull with a temperature imbalance of 100F. When this happens during a durability / wear test, the first thing we generally do is switch the pads side to side. Most often, the issue never returns and the wear measurements show no issues.

We used to tear everything down, measure dimensions of the steelback, caliper rollbacks, pressure differential, and never found anything significant. But flipping the pads does it's thing.

There are two common methods of measuring the hardness of brake pads. One is a Rockwell tester, but that plunger is too small and can give false readings. The other tool is a Gogan Harness tester, and with it's larger plunger is more appropriate. A Durometer is fine for soft materials like rubber compounds, but brake material is not compliant enough.
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Old 07-02-2007, 11:00 PM   #11 (permalink)
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Re: Brakes Pads are too hard says Ford


jack thanks for the education !
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Old 07-03-2007, 01:47 PM   #12 (permalink)
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Re: Brakes Pads are too hard says Ford

One of those goofy friction material science situations. While some compounds look like they are rubber based, they are too hard for a durometer. As weird as it sounds, some railroad wheel brake shoes are soft enough for a durometer and have a large rubber constituent. You just would not think something that brakes such a heavy train car would be like that.
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