ATF In The Brake System?

Powerstroke Man 6.4 · May 5, 2014

So I took the lariat to ford to fix the MC on the lariat and they said that they found ATF in the brake system and that i'll cost $4000 to fix/replace. They said the want to replace everything whole hydroboost system MC,booster calipers lines etc does that sound right? I asked them if they could do just a flush and just replace the MC but they said no. Could I take and let my local diesel shop flush and replace just the MC? I know I ain't going to pay $4000 LOL. What you guys think? Thanks in advance.

dsberman94 · May 5, 2014

Ok, I'm confused, aren't you able/supposed to run ATF in a hydro boost system?

Stroked777 · May 5, 2014

I would say flush it but my concern is what the ATF does to the seals and stuff in the brake system, idk how seals would react to the ATF, make them brittle or what not.

powerstroked08 · May 5, 2014

dsberman94 said:
Ok, I'm confused, aren't you able/supposed to run ATF in a hydro boost system?

On the pump side not on the brake fluid/master cylander side.

dsberman94 · May 5, 2014

powerstroked08 said:
On the pump side not on the brake fluid/master cylander side.

Ahh makes sense. And now I know.

Doodie · May 5, 2014

Hydro-boost brakes are part of the diesel engine pkg, nothing new. I think all 6.4's are Job 3 trucks. Diesel's don't make vacuum like a gasser. That is why we have hydraulic system.

ATF is the brake system? Have you seen who works at your local Ford dealer? A bunch of dumb sh!ts...

09stroker · May 5, 2014

But they do have vacuum pumps....

But yeah sounds like your dealer is fos

2wd-fire · May 5, 2014

I just replace master if your that worried open the bleeders with master disconnected and blow some air to black flush the old brake fluid out

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B585Ford · May 6, 2014

What happened that caused you to take your truck to get the MC replaced?

greasltn · May 6, 2014

If ATF is in the master cylinder, I can see their reason for replacing the hydro boost. That's the only place it could come from.

Mark Kovalsky · May 6, 2014

If ATF gets through the brake system it will destroy seals throughout the brake system. If you just replace the master and flush it you will have a MAJOR brake failure in a little while. This is going to be expensive, and there is no way around that. Sorry.

Bustedknuckles · May 6, 2014

My question is how did that happen in the first place? Also yes, if there is actually ATF in the system it will destroy every rubber seal. Id find a truck at a junkyard and pull everything you need.

Powerstroke Man 6.4 · May 6, 2014

B585Ford said:
What happened that caused you to take your truck to get the MC replaced?

http://powerstrokearmy.com/forums/showthread.php?t=50713

Powerstroke Man 6.4 · May 6, 2014

Bustedknuckles said:
My question is how did that happen in the first place? Also yes, if there is actually ATF in the system it will destroy every rubber seal. Id find a truck at a junkyard and pull everything you need.

They said a seal started to leak and the let the ATF in the brake system. Is this possible?

sootie · May 6, 2014

Doodie said:
Hydro-boost brakes are part of the diesel engine pkg, nothing new. I think all 6.4's are Job 3 trucks. Diesel's don't make vacuum like a gasser. That is why we have hydraulic system.

ATF is the brake system? Have you seen who works at your local Ford dealer? A bunch of dumb sh!ts...

huh? there are three job lots of 6.4s for starters. and yes they do have hydraulic brakes however; it is possible to have vacuum brakes on a diesel as the new trucks are like that.

Bustedknuckles · May 6, 2014

Powerstroke Man 6.4 said:
They said a seal started to leak and the let the ATF in the brake system. Is this possible?

I don't see how, but I guess maybe something in the hydroboost system could.

Stroked777 · May 7, 2014

Maybe he's saying ATF and means power steering fluid(same stuff). If that's the case the only way in to the brake system is through the mc some way

Powerstroke Man 6.4 · May 7, 2014

Stroked777 said:
Maybe he's saying ATF and means power steering fluid(same stuff). If that's the case the only way in to the brake system is through the mc some way

Yup ATF (power steering fluid) ford dealer said a seal leaked and let the ATF (power steering fluid) in the brake system IDK how but that's what they said.

Powerstroke Man 6.4 · May 11, 2014

Got it fixed on Friday flushed replaced MC then flushed again. If I ever need to replace the Hydro booster lines etc ill do it when that time comes around. Other than that the brakes work excellent now.