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Safety Recall 22S27 Rear Axle Bolt Fractures
- Thread starter TFocker
- Start date
Haven't had time to peruse the forums for a while, so I jumped on and saw your post. Great info, thanks!
So I did some research, here is what I found:
(p.s. the first ST I purchased in April 2022 shows as currently being under recall by NHTSA/FORD)
So I did some research, here is what I found:
- my ST was built one day after the recall cut off date per the latest 23S55 bulletin, so technically, my vehicle should have the fix
- checking further, I put my VIN into both the NHTSA/FORD recall page, no recalls exist for my ST
- still not believing it unless I confirmed it visually, I went out and took a pic (see below)
- confirmed, I have the upgraded bushing
(p.s. the first ST I purchased in April 2022 shows as currently being under recall by NHTSA/FORD)
One way to see if FORD's fix works (solid bushing/new bolt) is if vehicles that already had the upgrade done on the assembly line ever breaks a bolt.
If not, we could conclude it's a legit fix and that the 2/4 bolt was never really needed in the first place. Just a solid bushing like the one that came with the 2/4 bolts.
Only time will tell ...
If not, we could conclude it's a legit fix and that the 2/4 bolt was never really needed in the first place. Just a solid bushing like the one that came with the 2/4 bolts.
Only time will tell ...
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There is some evidence out there that these bolts will bend before breaking. If they bend, I would expect the differential to be slightly "out of position" versus a straight bolt. Recording some reference measurements, then comparing from time to time, might be a good indication of a bent bolt/impending breakage.
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That may be true about the bolt, but FORD is coupling that bolt with the upgraded bushing as well.
So hopefully, the bolt bending will no longer be an issue.
I vote you rethink making silly nonsensical remarks, that at best, aren't really that funny, and at worst, are grossly misleading based upon your own knee jerk emotional prejudices as demonstrated by your general lack of common sense. Please teach us how people like you can grow up and act like an adult.
So hopefully, the bolt bending will no longer be an issue.
I vote you rethink making silly nonsensical remarks, that at best, aren't really that funny, and at worst, are grossly misleading based upon your own knee jerk emotional prejudices as demonstrated by your general lack of common sense. Please teach us how people like you can grow up and act like an adult.
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Listen up everyone, I know we wish FORD would've said "Heh, we've got new 2/4 bolt's for 'ya so come on in so we can install it!"
But that ain't happening. So my question for the still rationally thinking crowd is: "Why do you think the upgraded bushing/bolt will not work?"
I'm no automotive engineer, and most of you aren't either. So what we have here is FORD using a solid bushing (that from the pics I've seen, is the same one that came on the 2/4 bolt rear subframe) together with an upgraded bolt, inserted into the single bushing slot of the 1/2 bolt subframe.
Do we have concrete scientific data to support that this will not work? Is there a strucutral engineer on this forum who can accurately compute the stresses placed on components within the rear subframe assembly, and then compare that with the load tolerances of the new upgraded single bushing/bolt set up and say it is inadequate?
I know knee jerk emotional reactions are part of life, especially when talking about car enthusaists and their vehicles. But let's drop all that cr@p and talk facts.
So here's where I'm at: If my friend who let me use his lift to install the rear brace (he's an engineer for a large company who rebuilds cars as a hobby) has the time, I'd consider having him remove the rear brace. No big deal. I'm not running a 500+ hp tune, just the 430 hp FP tune. So there you go ...
But that ain't happening. So my question for the still rationally thinking crowd is: "Why do you think the upgraded bushing/bolt will not work?"
I'm no automotive engineer, and most of you aren't either. So what we have here is FORD using a solid bushing (that from the pics I've seen, is the same one that came on the 2/4 bolt rear subframe) together with an upgraded bolt, inserted into the single bushing slot of the 1/2 bolt subframe.
Do we have concrete scientific data to support that this will not work? Is there a strucutral engineer on this forum who can accurately compute the stresses placed on components within the rear subframe assembly, and then compare that with the load tolerances of the new upgraded single bushing/bolt set up and say it is inadequate?
I know knee jerk emotional reactions are part of life, especially when talking about car enthusaists and their vehicles. But let's drop all that cr@p and talk facts.
So here's where I'm at: If my friend who let me use his lift to install the rear brace (he's an engineer for a large company who rebuilds cars as a hobby) has the time, I'd consider having him remove the rear brace. No big deal. I'm not running a 500+ hp tune, just the 430 hp FP tune. So there you go ...
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Regarding the comment: "what we have here is FORD using a solid bushing (that from the pics I've seen, is the same one that came on the 2/4 bolt rear subframe)".........
The "revised bushing" for the fix doesn't look anything like either of the original bushings on the 2/4 bolt cars. While the metal center section on the new one is "solid", the bushing itself certainly is not.
The "revised bushing" for the fix doesn't look anything like either of the original bushings on the 2/4 bolt cars. While the metal center section on the new one is "solid", the bushing itself certainly is not.
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Your information is great for anyone reading, but as a reply to the fire starter idiot it will mean nothing as he is well, stupid and refuses to acknowledge his lack of knowledge. Kinda like this:
When you’re dead, you don’t know you’re dead. The pain is only felt by others. The same thing happens when you’re stupid.
When you’re dead, you don’t know you’re dead. The pain is only felt by others. The same thing happens when you’re stupid.
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Now to address the new bushing & bolt. Based on this new design bushing, it appears to a knowledgeable person that Ford thinks the root cause was the sheer angle not remaining perpendicular to the fastener centerline such that it wasn’t subjected to a pure sheer load resulting in the bolt bending at the max load location. After it was/is bent, its load carrying strength was/is severely degraded, building more angled load momentum until failure.
The new bushing, being much thicker with much less rubber cushioning, will attempt to keep the load in pure sheer which will indeed strengthen the mounting. I obviously don’t have the sheer load rating of the bolt, but the new bushing is designed to correctly utilize that load rating.
The new bushing, being much thicker with much less rubber cushioning, will attempt to keep the load in pure sheer which will indeed strengthen the mounting. I obviously don’t have the sheer load rating of the bolt, but the new bushing is designed to correctly utilize that load rating.
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