“Finally”… a correction for Rear Brake Moan Noise

[Mark S.]

I appreciate everyone's opinion on these forums. Should I skip the dealer and just take it to a brake specialist for non-biased opinion? Just at the point I keep getting the run around from my dealer (telling me they hear nothing, or they need to keep it for a week which I cannot do without a vehicle that long). Feel like they dont want to bother with it as they wont make any money doing the TSB work. Also, keep hearing none of these "fixes" are actually eliminating the problem.

I think it will be hit or miss if you take it to the dealership. They don't have a consistently effective fix yet, so all they can do is put on what they have and hope it works. If you want to get it on record make arrangements to leave the car at the dealership overnight when you know it's going to be cold and wet the next morning, then have the tech in the car with you when you move it first thing.

If you want to avoid the noise in the mean time, apply just enough brake pedal force to keep the car from backing up, then use light throttle to overcome the brakes. The additional friction from light brake application will prevent the resonance that makes the noise. It's not an optimum fix, but it works for those who are embarrassed by the noise.

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[Spartan007]

Thanks for the insight Mark S. I, like many of you, are just so frustrated and embarrassed with this whale call lol. The fact that it is happening on NEW vehicles is just ridiculous (mine started just a few weeks after buying brand new). Went back and looked in the owners manual and saw first line in brakes section was "Occasional brake noise is normal". Seems like Ford knew this was going to happen and tried to cover themselves. I've had vehicles for 10+ yrs and NEVER had any noise until brake pads were worn down. I'm not a car expert, but just find it hard to believe that its "Normal" for a brand new vehicle to be producing noises like this.

 

[Mark S.]

I'm not a car expert, but just find it hard to believe that its "Normal" for a brand new vehicle to be producing noises like this.

Undesirable brake noise is a thorny issue that plagues even brands considered among the best engineered vehicles world wide. Porsche released the video below following years of complaints by its customers. Many here are (rightly) upset about weird noises on their $35K cars, imagine having this problem with a car that cost you $100K or more!

 

[mtbronco]

Just had my "22 BSOB in for a PA state inspection. Talked to service writer about rear brake noise, having had them try various fixes over the past two years. I mentioned TSB 23-2308 and his reply was that it "doesn't work."

Don't know if he was blowing smoke, but he went on to tell me that the problem is not the bushings but the brake disks. Ford requires semi-metallic disks. Due to a copper shortage, brake manufactures are struggling to make semi-metallics. He said that all auto manufactures are having this supply problem. He then said that installing ceramic disks would stop the noise but Ford won't authorize it to be done. So, if you want to fix the noise problem, you'll have to spend $200+ for ceramic brakes.

My dealership told me the same thing about "it may or may not fix the issue". Well, guess that's correct. My sport was at the dealer for 2 weeks just recently, one to do the TSB on the brakes and the other to fix a metal-on-metal rattle in the rear. They told me they did the TSB, but it's still making that whaling noise. And as for the rattle, Ford Engineers came back with "that's normal". So, i'm really thinking of switching to the ceramic brake pads because i have just over 26k miles and mine squeal when braking through a drive through or stopping at lights.

 

[mtbronco]

I haven't seen any reports back from anyone here that had 2308 done, so I think he's blowing smoke. Doesn't seem like the parts are readily available yet. Just my opinion, but I don't think the rear brake moan is a pad material issue. Cheers!

The TSB has been out for at least a year. Now, I do know that it was another TSB number for the original and that it was just replaced recently. The problem is the parts are always on backorder. I've been trying to get mine done for the past year and always get the response, "parts are on backorder". Finally got it done 2 weeks ago and they're still moaning, so yes, it doesn't work.

 

[Dude]

The TSB has been out for at least a year. Now, I do know that it was another TSB number for the original and that it was just replaced recently. The problem is the parts are always on backorder. I've been trying to get mine done for the past year and always get the response, "parts are on backorder". Finally got it done 2 weeks ago and they're still moaning, so yes, it doesn't work.

TSB 23-2308
Moan Noise In The Rear Brakes When Vehicle Is Driven In Reverse (R) In Cold Weather And/Or High Humidity
https://static.nhtsa.gov/odi/tsbs/2023/MC-10244711-0001.pdf
Supersedes 23-2041

TSB 23-2041(obsolete)
Supersedes 22-2326

TSB 22-2326 (obsolete)

 

[mtbronco]

TSB 23-2308
Moan Noise In The Rear Brakes When Vehicle Is Driven In Reverse (R) In Cold Weather And/Or High Humidity
https://static.nhtsa.gov/odi/tsbs/2023/MC-10244711-0001.pdf
Supersedes 23-2041

TSB 23-2041(obsolete)
Supersedes 22-2326

TSB 22-2326 (obsolete)

your point to your reply was?

 

[Dude]

your point to your reply was?

Many owners have said their dealership recently applied “the TSB” (for Moan Noise In The Rear Brakes) but turned out was not TSB 23-2308 and for some the dealership was not aware of TSB 23-2308. The owners had to inform the dealership.

TSB 23-2308 came out October 2023 according to the NHTSA PDF so one clue is when someone says “The TSB has been out for at least a year” they might not know about TSB 23-2308.

The jury is still out if TSB 23-2308 actually solves the moan noise. Many but not all owners reported noise was gone after TSB 23-2308 was applied but really they probably need to wait awhile for the right weather conditions.

And because there are 3 TSBs (2 obsolete now) … “The TSB..” doesn’t provide info as to which TSB was performed.

And there is at least one case where the paperwork for the service listed TSB 23-2308 but the parts used were for one of the earlier (now obsolete) TSBs. So would need to compare part numbers on the service paperwork to the parts listed in TSB 23-2308 to check if the dealership used the correct parts.

Edited: also see Post #40 as TSB parts have been reported to be improperly installed by dealerships.

 

[DirtyLuke]

It's pretty well understood by now that the noise is a resonance mode in the rear brake system and not a mechanical grinding of any parts. With that said, I totally believe that changing the material of the rotors would solve the problem by changing the natural resonance frequencies of the rotor.

But, if the rotor material was the only reason we get a resonance, it would happen in the forward direction too. My hypothesis is that the pads (or the whole caliper bracket) shift when run in reverse into a position where they touch the rotor like a glass harp. The new TSB replaces the caliper spring. I'm hoping that changes or eliminates the pad/bracket shift, which alone could stop the resonance.

My BS is at the dealer as of yesterday for the TSB. Annoyingly, they have to do the formal diagnostic process in order for it to be under warranty, so I have to leave it there for several days. If the resonance doesn't go away completely after that, new rotors will be my last resort.

The new TSB removed my noise. Just a data point. Cheers.

 

[69cuda340s]

The noisy Manual Park Release Cable Ford came out with second revision in '22. I put that one on mine myself $50 delivered. Silent zero noise nothing. Point is the engineers at Ford do work on the defects and in the case of the noisy cable they solved that one.

The second revised TSB brake noise moan might have parts that solve it. But it requires a skilled mechanic to install. So even if Ford comes up with a solution the chance of dealer actually installing parts correctly is low. Then everyone is gonna assume Ford doesn't have a fix when it could be dealer botches up the repair.

 

[Caveman]

Finally is in quotes because need to verify this Bulletin corrects the Rear Brake Moan Noise as stated in the Bulletin.

TSB 23-2308
https://static.nhtsa.gov/odi/tsbs/2023/MC-10244711-0001.pdf

Dated 09 October 2023 and states “This bulletin supersedes 23-2041”

Has anyone had this Service Procedure done and if so what were the results?

I just got my TSB completed last week.
The brakes still make the noise....it is not as bad as it was before. Its a lighter noise but I'm afraid it will get worse.
Something I am just going to come to terms in living with the noise.
I get 30 miles to the gallon so not willing to trade it because everything else about my BS base is excellent from my experience and perspective. I have 20,000 miles on it now. Took a long time for the dealer to get parts. It looks to me as if this didn't fix it, its not going to be fixed.

 

[Dude]

I just got my TSB completed last week.
The brakes still make the noise....it is not as bad as it was before. Its a lighter noise but I'm afraid it will get worse.

Some owners posted the noise results depend greatly on the skill of the person that performs TSB 23-2308 (and on the 2 prior TSBs that are obsolete)

Or maybe the tolerances and other brake parts on some BSs just means some make more noise than others. Some owners stated they never hear noise when backing up.

 

[johnardsg]

Some owners posted the noise results depend greatly on the skill of the person that performs TSB 23-2308 (and on the 2 prior TSBs that are obsolete)

Or maybe the tolerances and other brake parts on some BSs just means some make more noise than others. Some owners stated they never hear noise when backing up.

I only had this issue in texas weather, sun+rain+high temp mix. I never had this whale call back in oregon where it’s aways raining.

 

[tconstan]

Some owners posted the noise results depend greatly on the skill of the person that performs TSB 23-2308 (and on the 2 prior TSBs that are obsolete)

Or maybe the tolerances and other brake parts on some BSs just means some make more noise than others. Some owners stated they never hear noise when backing up.

Did not fix the problem!

 

[Bucko]

These last 5 responses lead me to think that three things have to take place before the latest TSB will work....

Latest TSB, Correct parts, And must be installed correctly.

Might as well add that the latest lunar eclipse occurred, and that world peace is just around the corner.

Geeze!

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