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View Poll Results: Ultimate S55 Spun Crank Hub Poll -- Please vote
2014-2015 | 6MT | Stock | No SCH 103 6.56%
2014-2015 | 6MT | Stock | SCH Failure 6 0.38%
2014-2015 | 6MT | Modified 450-500 whp | No SCH 37 2.36%
2014-2015 | 6MT | Modified 450-500 whp | SCH Failure 10 0.64%
2014-2015 | 6MT | Modified 500-550 whp | No SCH 20 1.27%
2014-2015 | 6MT | Modified 500-550 whp | SCH Failure 6 0.38%
2014-2015 | 6MT | Modified 550+ whp | No SCH 10 0.64%
2014-2015 | 6MT | Modified 550+ whp | SCH Failure 5 0.32%
2014-2015 | DCT | Stock | No SCH 151 9.61%
2014-2015 | DCT | Stock | SCH Failure 3 0.19%
2014-2015 | DCT | Modified 450-500 whp | No SCH 100 6.37%
2014-2015 | DCT | Modified 450-500 whp | SCH Failure 11 0.70%
2014-2015 | DCT | Modified 500-550 whp | No SCH 45 2.86%
2014-2015 | DCT | Modified 500-550 whp | SCH Failure 8 0.51%
2014-2015 | DCT | Modified 550+ whp | No SCH 25 1.59%
2014-2015 | DCT | Modified 550+ whp | SCH Failure 7 0.45%
2016 | 6MT | Stock | No SCH 57 3.63%
2016 | 6MT | Stock | SCH Failure 3 0.19%
2016 | 6MT | Modified 450-500 whp | No SCH 26 1.65%
2016 | 6MT | Modified 450-500 whp | SCH Failure 3 0.19%
2016 | 6MT | Modified 500-550 whp | No SCH 14 0.89%
2016 | 6MT | Modified 500-550 whp | SCH Failure 4 0.25%
2016 | 6MT | Modified 550+ whp | No SCH 5 0.32%
2016 | 6MT | Modified 550+ whp | SCH Failure 2 0.13%
2016 | 6MT Comp Package | Stock | No SCH 9 0.57%
2016 | 6MT Comp Package | Stock | SCH Failure 1 0.06%
2016 | 6MT Comp Package | Modified 450-500 whp | No SCH 0 0%
2016 | 6MT Comp Package | Modified 450-500 whp | SCH Failure 2 0.13%
2016 | 6MT Comp Package | Modified 500-550 whp | No SCH 2 0.13%
2016 | 6MT Comp Package | Modified 500-550 whp | SCH Failure 0 0%
2016 | 6MT Comp Package | Modified 550+ whp | No SCH 1 0.06%
2016 | 6MT Comp Package | Modified 550+ whp | SCH Failure 1 0.06%
2016 | DCT | Stock | No SCH 112 7.13%
2016 | DCT | Stock | SCH Failure 2 0.13%
2016 | DCT | Modified 450-500 whp | No SCH 45 2.86%
2016 | DCT | Modified 450-500 whp | SCH Failure 2 0.13%
2016 | DCT | Modified 500-550 whp | No SCH 27 1.72%
2016 | DCT | Modified 500-550 whp | SCH Failure 0 0%
2016 | DCT | Modified 550+ whp | No SCH 8 0.51%
2016 | DCT | Modified 550+ whp | SCH Failure 3 0.19%
2016 | DCT Comp Package | Stock | No SCH 19 1.21%
2016 | DCT Comp Package | Stock | SCH Failure 0 0%
2016 | DCT Comp Package | Modified 450-500 whp | No SCH 5 0.32%
2016 | DCT Comp Package | Modified 450-500 whp | SCH Failure 0 0%
2016 | DCT Comp Package | Modified 500-550 whp | No SCH 5 0.32%
2016 | DCT Comp Package | Modified 500-550 whp | SCH Failure 3 0.19%
2016 | DCT Comp Package | Modified 550+ whp | No SCH 3 0.19%
2016 | DCT Comp Package | Modified 550+ whp | SCH Failure 2 0.13%
2017 | 6MT | Stock | No SCH 17 1.08%
2017 | 6MT | Stock | SCH Failure 0 0%
2017 | 6MT | Modified 450-500 whp | No SCH 7 0.45%
2017 | 6MT | Modified 450-500 whp | SCH Failure 1 0.06%
2017 | 6MT | Modified 500-550 whp | No SCH 6 0.38%
2017 | 6MT | Modified 500-550 whp | SCH Failure 0 0%
2017 | 6MT | Modified 550+ whp | No SCH 1 0.06%
2017 | 6MT | Modified 550+ whp | SCH Failure 1 0.06%
2017 | 6MT Comp Package | Stock | No SCH 20 1.27%
2017 | 6MT Comp Package | Stock | SCH Failure 1 0.06%
2017 | 6MT Comp Package | Modified 450-500 whp | No SCH 4 0.25%
2017 | 6MT Comp Package | Modified 450-500 whp | SCH Failure 2 0.13%
2017 | 6MT Comp Package | Modified 500-550 whp | No SCH 3 0.19%
2017 | 6MT Comp Package | Modified 500-550 whp | SCH Failure 1 0.06%
2017 | 6MT Comp Package | Modified 550+ whp | No SCH 3 0.19%
2017 | 6MT Comp Package | Modified 550+ whp | SCH Failure 2 0.13%
2017 | DCT | Stock | No SCH 42 2.67%
2017 | DCT | Stock | SCH Failure 0 0%
2017 | DCT | Modified 450-500 whp | No SCH 8 0.51%
2017 | DCT | Modified 450-500 whp | SCH Failure 2 0.13%
2017 | DCT | Modified 500-550 whp | No SCH 10 0.64%
2017 | DCT | Modified 500-550 whp | SCH Failure 2 0.13%
2017 | DCT | Modified 550+ whp | No SCH 3 0.19%
2017 | DCT | Modified 550+ whp | SCH Failure 2 0.13%
2017 | DCT Comp Package | Stock | No SCH 49 3.12%
2017 | DCT Comp Package | Stock | SCH Failure 1 0.06%
2017 | DCT Comp Package | Modified 450-500 whp | No SCH 15 0.95%
2017 | DCT Comp Package | Modified 450-500 whp | SCH Failure 0 0%
2017 | DCT Comp Package | Modified 500-550 whp | No SCH 11 0.70%
2017 | DCT Comp Package | Modified 500-550 whp | SCH Failure 0 0%
2017 | DCT Comp Package | Modified 550+ whp | No SCH 6 0.38%
2017 | DCT Comp Package | Modified 550+ whp | SCH Failure 1 0.06%
2018+ | 6MT | Stock | No SCH 53 3.37%
2018+ | 6MT | Stock | SCH Failure 2 0.13%
2018+ | 6MT | Modified 450-500 whp | No SCH 9 0.57%
2018+ | 6MT | Modified 450-500 whp | SCH Failure 2 0.13%
2018+ | 6MT | Modified 500-550 whp | No SCH 2 0.13%
2018+ | 6MT | Modified 500-550 whp | SCH Failure 6 0.38%
2018+ | 6MT | Modified 550+ whp | No SCH 1 0.06%
2018+ | 6MT | Modified 550+ whp | SCH Failure 0 0%
2018+ | 6MT Comp Package | Stock | No SCH 61 3.88%
2018+ | 6MT Comp Package | Stock | SCH Failure 2 0.13%
2018+ | 6MT Comp Package | Modified 450-500 whp | No SCH 13 0.83%
2018+ | 6MT Comp Package | Modified 450-500 whp | SCH Failure 2 0.13%
2018+ | 6MT Comp Package | Modified 500-550 whp | No SCH 7 0.45%
2018+ | 6MT Comp Package | Modified 500-550 whp | SCH Failure 1 0.06%
2018+ | 6MT Comp Package | Modified 550+ whp | No SCH 4 0.25%
2018+ | 6MT Comp Package | Modified 550+ whp | SCH Failure 1 0.06%
2018+ | DCT | Stock | No SCH 76 4.84%
2018+ | DCT | Stock | SCH Failure 4 0.25%
2018+ | DCT | Modified 450-500 whp | No SCH 16 1.02%
2018+ | DCT | Modified 450-500 whp | SCH Failure) 6 0.38%
2018+ | DCT | Modified 500-550 whp | No SCH 10 0.64%
2018+ | DCT | Modified 500-550 whp | SCH Failure 4 0.25%
2018+ | DCT | Modified 550+ whp | No SCH 4 0.25%
2018+ | DCT | Modified 550+ whp | SCH Failure 3 0.19%
2018+ | DCT Comp Package | Stock | No SCH 101 6.43%
2018+ | DCT Comp Package | Stock | SCH Failure 4 0.25%
2018+ | DCT Comp Package | Modified 450-500 whp | No SCH 21 1.34%
2018+ | DCT Comp Package | Modified 450-500 whp | SCH Failure) 4 0.25%
2018+ | DCT Comp Package | Modified 500-550 whp | No SCH 20 1.27%
2018+ | DCT Comp Package | Modified 500-550 whp | SCH Failure 5 0.32%
2018+ | DCT Comp Package | Modified 550+ whp | No SCH 17 1.08%
2018+ | DCT Comp Package | Modified 550+ whp | SCH Failure 14 0.89%
Multiple Choice Poll. Voters: 1571. You may not vote on this poll

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      01-28-2020, 12:49 PM   #199
QMoney
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Originally Posted by 1azycat View Post
For those who are still saying no SCH.. xxx miles.. stage 2 blah blah and they have been trying hard etc. Pls try to do the following,

1. Flash your DCT to GTS DCT flash.
2. drive at around 60kmh in 4th gear, then use the kick down acceleration (push button at end of the accelerator) so gearbox drops from 4th to 2nd.

If you do the above, you should get a SCH. Let me know if it works!
Why the hell is anyone flooring a car while in 4th gear at 60kmh.

Maybe all these SCH are guys who don't know how to drive properly.

LOW RPM + HIGH LOAD (Peddle to the floor) = Bad sound, Bad feeling, Bad everything.

I am not sure the kick down is what even causes the problem, it's everything before the actual dropping of gears that causes the SCH.

I have never tried this because I always drive my car in Manual mode but let's say I am doing 70kmh in 7th gear and I mash the throttle past kick down but I don't press the paddle shifter, will it drop gears for me?

I suspect the dropping gears is what might actually save the SCH but it is never done quick enough.

I believe most of these SCH happen when engine is at 1500-2000 RPM and someone mashes the damn throttle trying to accelerate in too high of a gear and there goes your engine.

Word of advice, keep your RPM's in the 4-5k range before mashing throttles unless you are in first and second where the load isn't extensive enough and you are in the proper gear for low RPM acceleration. Do people not feel that engine struggle when they mash in high gear?
Correct me if I'm wrong but that's how you drive an automatic. The vehicle will select the highest gear for maximum mpg and when you put your foot down, it drops to the lowest gear possible.

This is how automatic are meant to be driven so I'm not sure what you're trying to say. If the vehicle didn't have paddle shifters or a manual shifter, you think the car will drop one gear, and then another?
What I am saying is do not use the kickdown and stop mashing throttle when under 2k rpm.

If you are driving an M car drive it how it's meant to be driven, no need for agressive downshifts if you are running around town at 3k+ rpm all day, 1 downshift and you are in your power band.

I don't downshift 1 gear after the other, I just stay at 3-4k rpm all day and downshift once and i am at 4-5k i can pin it, and move, if i am trying to do highway pulls i will be at 5k+ lowest gear possible if i am going to pull.

If i am at a track i am hanging out 1 downshift away from max acceleration, there is never a reason why you should be consistently mashing from 7th to 2nd.

Do people really hang around at sub 2k rpm and just decide oh fuck i want this max acceleration right now let me just kick this shit down, maybe the odd emergency pass?
Doesn't the vibration annoy you after a minute? Lol am I the only one that shifts in the 2k-2.5k range?
Vibration? as in engine note? not at all

I shift at 5k+ mostly, unless warming my car up i will shift at 3-4k.
Damn daily driving and shifting at 5k+? Lol best of luck to you champ!
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      02-06-2020, 10:33 PM   #200
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2018 M3CS here, Spun @8666 miles (talk about bad luck), currently fixed on Insane Performance CH. Prior to spinning I was on stock tune driving normally to get dinner. 2 weeks prior I was on Full E85 no issues and when I was on stock tune it went.
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      02-07-2020, 06:30 AM   #201
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Quote:
Originally Posted by kevCS View Post
2018 M3CS here, Spun @8666 miles (talk about bad luck), currently fixed on Insane Performance CH. Prior to spinning I was on stock tune driving normally to get dinner. 2 weeks prior I was on Full E85 no issues and when I was on stock tune it went.
Probably the tune stretched or untorqued the bolt, and with stock tune it needed only one last "untorque"
When i hear about people saying they were going slow and then the SCH happen, i allways think about does random more agressive downshifts from 3rd to 2nd... can be one of the causes
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      02-12-2020, 03:38 PM   #202
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Lots of these threads have comments saying DCT cars are more susceptible to this issue and this survey would appear to support that at first with DCT cars with SCH outnumbering manual cars with it 2:1. But then I looked at the post about total production figures. Globally DCT cars outnumber manuals 5.4:1. This would seem to indicate that DCT cars are actually less likely to be victims of this which makes sense to me since there's no chance of sloppy downshifts without rev-matching...
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      02-13-2020, 12:04 AM   #203
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Views

Im getting an M4, used, and read a ton of the forums for views on this issue. is there any way to check if the crankhub is worn or otherwise weakened for whatever reason? I will avoid kickdowns and high power low rpm after buying, but want to know ive got something which isnt tainted in that senze
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      02-13-2020, 03:25 PM   #204
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Quote:
Originally Posted by Tangent View Post
Lots of these threads have comments saying DCT cars are more susceptible to this issue and this survey would appear to support that at first with DCT cars with SCH outnumbering manual cars with it 2:1. But then I looked at the post about total production figures. Globally DCT cars outnumber manuals 5.4:1. This would seem to indicate that DCT cars are actually less likely to be victims of this which makes sense to me since there's no chance of sloppy downshifts without rev-matching...
This. But ultimately, SCH doesn't care if you're MT, AT, or DCT. The non-keyed hub design is simply not geared for high horsepower/high rev application.
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      02-16-2020, 06:39 PM   #205
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MaxPSI hub here, installed by MaxPSI/bimmerclinic themselves. 19,000 miles and Bootmod3 Stage 1. No issues to report. They no longer sell the hub because of costs and improper 3rd party installs causing failures is my understanding.
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      02-20-2020, 01:18 PM   #206
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79,600 miles....stage 2 VF tune, full bolt on CSF intercooler since 28,000miles... no issues , no crank hub mod!!!!!!!!!!!!!!!!!!!!
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      02-26-2020, 07:17 AM   #207
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Has anyone in this thread actually taken a statistics class or classes on how studies like this are done properly? None of this data is in any way shape or form even usable. For 1, people with SCH failures or people are worried about SCH failures are going to be more likely to cast a vote. In addition, the sampling data isn't an accurate representation of the overall population of owners as you have to be a member of the forum to even be able to participate (which obviously limits the demographic of people who are being represented right off the bat). I say all of that to say this... DONT read too much into this data...
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      02-26-2020, 08:05 AM   #208
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Quote:
Originally Posted by jmatta33 View Post
Has anyone in this thread actually taken a statistics class or classes on how studies like this are done properly? None of this data is in any way shape or form even usable. For 1, people with SCH failures or people are worried about SCH failures are going to be more likely to cast a vote. In addition, the sampling data isn't an accurate representation of the overall population of owners as you have to be a member of the forum to even be able to participate (which obviously limits the demographic of people who are being represented right off the bat). I say all of that to say this... DONT read too much into this data...
Also, the standard population is most likely driving these cars vastly different than the members on this forum who track, tune, mod, etc.

Technically this is the only sample that should matter to us, but you are definetly right, guys who spun are going to be voting way more than us who haven't (knock on wood). Also misclicks, troll votes, etc. Also on the MT's we don't know what proportion were money shifts.

All of this is basically useless data but what we do know is that it is possible. it does happen. and it has happened more than a few times. That is enough to scare anyone.

What i am more concerned about is what proportion is catastrophic
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      02-28-2020, 10:04 AM   #209
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Quote:
Originally Posted by deeldoo View Post
Also, the standard population is most likely driving these cars vastly different than the members on this forum who track, tune, mod, etc.

Technically this is the only sample that should matter to us, but you are definetly right, guys who spun are going to be voting way more than us who haven't (knock on wood). Also misclicks, troll votes, etc. Also on the MT's we don't know what proportion were money shifts.

All of this is basically useless data but what we do know is that it is possible. it does happen. and it has happened more than a few times. That is enough to scare anyone.

What i am more concerned about is what proportion is catastrophic
The only thing I need to know is that is more than a freak occurrence and how to fix it. This has been thoroughly answered so now I just need to get the money together to have the fix done... lol
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      07-16-2020, 10:22 PM   #210
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'15 fbo e85 6mt dd, no SCH
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      07-22-2020, 03:49 PM   #211
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Just wondering the ones that spun, were they all built in the same country? Or is it random....
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      07-23-2020, 09:11 AM   #212
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I love these bogus crank hub threads.... Read carefully 88,000miles full bolt on stage 2 Hex tune , CSF intercooler, titanium mpe exhaust, carbon afe intake....no issues....and yes i downshift hard , track the car....i also do 30,40,60 rolls against mustangs , Camaros , vettes etc ....and this car is absolutely flawless, no crank capture or any crank hub mod....none, stay away from e85 tunes and 700rwp and you too can post a testimony 🙌 like this lol...93 octane tune only
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      07-23-2020, 10:34 AM   #213
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I know that the numbers are listed but there are so many options: is there any way we can get an overall number of SCH vs. No SCH with like MY, DCT VS. 6MT, or just overall?
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      07-23-2020, 03:16 PM   #214
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Quote:
Originally Posted by hworang00 View Post
I know that the numbers are listed but there are so many options: is there any way we can get an overall number of SCH vs. No SCH with like MY, DCT VS. 6MT, or just overall?
I was literally just thinking of making a spreadsheet and filted lol.
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      07-23-2020, 03:54 PM   #215
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Here is a quick break down w/ percentages to get a better picture or odds if you will.
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      07-23-2020, 04:36 PM   #216
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This is better.
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      07-23-2020, 11:29 PM   #217
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Quote:
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This is better.
Failure means blown engine?
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      07-24-2020, 08:16 AM   #218
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This is better.
Thank! That helps out a lot!
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      07-24-2020, 10:57 AM   #219
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Originally Posted by aswy6 View Post
Failure means blown engine?
Failure means the Crank Hub Spun
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      07-24-2020, 03:56 PM   #220
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So basically there is no real difference between 6MT and DCT when comparing all stats, but stock vs modified there is a clear difference!

I wonder if the real problem is just crank harmonics/vibration at higher power levels making the crank bolt coming loose?
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