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View Poll Results: Ultimate S55 Spun Crank Hub Poll -- Please vote
2014-2015 | 6MT | Stock | No SCH 62 6.22%
2014-2015 | 6MT | Stock | SCH Failure 2 0.20%
2014-2015 | 6MT | Modified 450-500 whp | No SCH 27 2.71%
2014-2015 | 6MT | Modified 450-500 whp | SCH Failure 6 0.60%
2014-2015 | 6MT | Modified 500-550 whp | No SCH 15 1.51%
2014-2015 | 6MT | Modified 500-550 whp | SCH Failure 4 0.40%
2014-2015 | 6MT | Modified 550+ whp | No SCH 8 0.80%
2014-2015 | 6MT | Modified 550+ whp | SCH Failure 4 0.40%
2014-2015 | DCT | Stock | No SCH 110 11.04%
2014-2015 | DCT | Stock | SCH Failure 2 0.20%
2014-2015 | DCT | Modified 450-500 whp | No SCH 64 6.43%
2014-2015 | DCT | Modified 450-500 whp | SCH Failure 5 0.50%
2014-2015 | DCT | Modified 500-550 whp | No SCH 32 3.21%
2014-2015 | DCT | Modified 500-550 whp | SCH Failure 4 0.40%
2014-2015 | DCT | Modified 550+ whp | No SCH 19 1.91%
2014-2015 | DCT | Modified 550+ whp | SCH Failure 7 0.70%
2016 | 6MT | Stock | No SCH 42 4.22%
2016 | 6MT | Stock | SCH Failure 3 0.30%
2016 | 6MT | Modified 450-500 whp | No SCH 17 1.71%
2016 | 6MT | Modified 450-500 whp | SCH Failure 2 0.20%
2016 | 6MT | Modified 500-550 whp | No SCH 9 0.90%
2016 | 6MT | Modified 500-550 whp | SCH Failure 3 0.30%
2016 | 6MT | Modified 550+ whp | No SCH 2 0.20%
2016 | 6MT | Modified 550+ whp | SCH Failure 1 0.10%
2016 | 6MT Comp Package | Stock | No SCH 8 0.80%
2016 | 6MT Comp Package | Stock | SCH Failure 1 0.10%
2016 | 6MT Comp Package | Modified 450-500 whp | No SCH 0 0%
2016 | 6MT Comp Package | Modified 450-500 whp | SCH Failure 2 0.20%
2016 | 6MT Comp Package | Modified 500-550 whp | No SCH 2 0.20%
2016 | 6MT Comp Package | Modified 500-550 whp | SCH Failure 0 0%
2016 | 6MT Comp Package | Modified 550+ whp | No SCH 0 0%
2016 | 6MT Comp Package | Modified 550+ whp | SCH Failure 0 0%
2016 | DCT | Stock | No SCH 73 7.33%
2016 | DCT | Stock | SCH Failure 0 0%
2016 | DCT | Modified 450-500 whp | No SCH 35 3.51%
2016 | DCT | Modified 450-500 whp | SCH Failure 2 0.20%
2016 | DCT | Modified 500-550 whp | No SCH 18 1.81%
2016 | DCT | Modified 500-550 whp | SCH Failure 0 0%
2016 | DCT | Modified 550+ whp | No SCH 4 0.40%
2016 | DCT | Modified 550+ whp | SCH Failure 3 0.30%
2016 | DCT Comp Package | Stock | No SCH 14 1.41%
2016 | DCT Comp Package | Stock | SCH Failure 0 0%
2016 | DCT Comp Package | Modified 450-500 whp | No SCH 2 0.20%
2016 | DCT Comp Package | Modified 450-500 whp | SCH Failure 0 0%
2016 | DCT Comp Package | Modified 500-550 whp | No SCH 4 0.40%
2016 | DCT Comp Package | Modified 500-550 whp | SCH Failure 3 0.30%
2016 | DCT Comp Package | Modified 550+ whp | No SCH 3 0.30%
2016 | DCT Comp Package | Modified 550+ whp | SCH Failure 2 0.20%
2017 | 6MT | Stock | No SCH 11 1.10%
2017 | 6MT | Stock | SCH Failure 0 0%
2017 | 6MT | Modified 450-500 whp | No SCH 2 0.20%
2017 | 6MT | Modified 450-500 whp | SCH Failure 1 0.10%
2017 | 6MT | Modified 500-550 whp | No SCH 2 0.20%
2017 | 6MT | Modified 500-550 whp | SCH Failure 0 0%
2017 | 6MT | Modified 550+ whp | No SCH 1 0.10%
2017 | 6MT | Modified 550+ whp | SCH Failure 0 0%
2017 | 6MT Comp Package | Stock | No SCH 16 1.61%
2017 | 6MT Comp Package | Stock | SCH Failure 1 0.10%
2017 | 6MT Comp Package | Modified 450-500 whp | No SCH 3 0.30%
2017 | 6MT Comp Package | Modified 450-500 whp | SCH Failure 1 0.10%
2017 | 6MT Comp Package | Modified 500-550 whp | No SCH 2 0.20%
2017 | 6MT Comp Package | Modified 500-550 whp | SCH Failure 1 0.10%
2017 | 6MT Comp Package | Modified 550+ whp | No SCH 2 0.20%
2017 | 6MT Comp Package | Modified 550+ whp | SCH Failure 0 0%
2017 | DCT | Stock | No SCH 24 2.41%
2017 | DCT | Stock | SCH Failure 0 0%
2017 | DCT | Modified 450-500 whp | No SCH 4 0.40%
2017 | DCT | Modified 450-500 whp | SCH Failure 2 0.20%
2017 | DCT | Modified 500-550 whp | No SCH 7 0.70%
2017 | DCT | Modified 500-550 whp | SCH Failure 2 0.20%
2017 | DCT | Modified 550+ whp | No SCH 3 0.30%
2017 | DCT | Modified 550+ whp | SCH Failure 2 0.20%
2017 | DCT Comp Package | Stock | No SCH 31 3.11%
2017 | DCT Comp Package | Stock | SCH Failure 1 0.10%
2017 | DCT Comp Package | Modified 450-500 whp | No SCH 12 1.20%
2017 | DCT Comp Package | Modified 450-500 whp | SCH Failure 0 0%
2017 | DCT Comp Package | Modified 500-550 whp | No SCH 9 0.90%
2017 | DCT Comp Package | Modified 500-550 whp | SCH Failure 0 0%
2017 | DCT Comp Package | Modified 550+ whp | No SCH 5 0.50%
2017 | DCT Comp Package | Modified 550+ whp | SCH Failure 1 0.10%
2018+ | 6MT | Stock | No SCH 32 3.21%
2018+ | 6MT | Stock | SCH Failure 1 0.10%
2018+ | 6MT | Modified 450-500 whp | No SCH 5 0.50%
2018+ | 6MT | Modified 450-500 whp | SCH Failure 1 0.10%
2018+ | 6MT | Modified 500-550 whp | No SCH 1 0.10%
2018+ | 6MT | Modified 500-550 whp | SCH Failure 4 0.40%
2018+ | 6MT | Modified 550+ whp | No SCH 0 0%
2018+ | 6MT | Modified 550+ whp | SCH Failure 0 0%
2018+ | 6MT Comp Package | Stock | No SCH 36 3.61%
2018+ | 6MT Comp Package | Stock | SCH Failure 1 0.10%
2018+ | 6MT Comp Package | Modified 450-500 whp | No SCH 8 0.80%
2018+ | 6MT Comp Package | Modified 450-500 whp | SCH Failure 2 0.20%
2018+ | 6MT Comp Package | Modified 500-550 whp | No SCH 5 0.50%
2018+ | 6MT Comp Package | Modified 500-550 whp | SCH Failure 0 0%
2018+ | 6MT Comp Package | Modified 550+ whp | No SCH 3 0.30%
2018+ | 6MT Comp Package | Modified 550+ whp | SCH Failure 0 0%
2018+ | DCT | Stock | No SCH 29 2.91%
2018+ | DCT | Stock | SCH Failure 3 0.30%
2018+ | DCT | Modified 450-500 whp | No SCH 7 0.70%
2018+ | DCT | Modified 450-500 whp | SCH Failure) 2 0.20%
2018+ | DCT | Modified 500-550 whp | No SCH 4 0.40%
2018+ | DCT | Modified 500-550 whp | SCH Failure 3 0.30%
2018+ | DCT | Modified 550+ whp | No SCH 1 0.10%
2018+ | DCT | Modified 550+ whp | SCH Failure 2 0.20%
2018+ | DCT Comp Package | Stock | No SCH 50 5.02%
2018+ | DCT Comp Package | Stock | SCH Failure 3 0.30%
2018+ | DCT Comp Package | Modified 450-500 whp | No SCH 11 1.10%
2018+ | DCT Comp Package | Modified 450-500 whp | SCH Failure) 4 0.40%
2018+ | DCT Comp Package | Modified 500-550 whp | No SCH 11 1.10%
2018+ | DCT Comp Package | Modified 500-550 whp | SCH Failure 4 0.40%
2018+ | DCT Comp Package | Modified 550+ whp | No SCH 9 0.90%
2018+ | DCT Comp Package | Modified 550+ whp | SCH Failure 8 0.80%
Multiple Choice Poll. Voters: 996. You may not vote on this poll

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      09-15-2019, 12:33 AM   #177
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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!
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      09-15-2019, 02:51 PM   #178
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Quote:
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!
Curious, why the GTS DCT flash?
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      09-15-2019, 03:45 PM   #179
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Quote:
Originally Posted by marvinp View Post
Quote:
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!
Curious, why the GTS DCT flash?
Assuming he is being sarcastic....

I suspect he included this because the GTS tune increases clamping force for the DCT clutches, this transferring more power to driveline, instead of Laing at clutch slip.
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      09-19-2019, 12:21 PM   #180
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Not sure how much different the programming is between the m2 comp's and your m3/m4's but mine dtc slingshots each shift like unbelievable before and after I dtc tuned it with bm3. This alone (while I do love it) has to really put a lot of stress on the crank hub.
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      10-23-2019, 10:55 AM   #181
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Why are there so many people getting spun crank hubs on their stock cars? Even more so than modified cars. This is scaring me. I have a 2015 as well running stock with DCT...
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      11-24-2019, 02:02 AM   #182
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Quote:
Originally Posted by j2dad5389 View Post
Why are there so many people getting spun crank hubs on their stock cars? Even more so than modified cars. This is scaring me. I have a 2015 as well running stock with DCT...
??? Not sure where you are getting that information from? Although it is hard to draw hard and fast conclusion from this thread/poll as it only covers a small portion of the actual S55's sold, it appears that all signs point to modified cars being much more susceptible than stock.
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      11-24-2019, 12:10 PM   #183
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So no more crank hub issues on stock S55 s?????
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      12-22-2019, 10:43 PM   #184
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Quote:
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?
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      12-23-2019, 12:52 AM   #185
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Stay stock and drive it the way it was meant to be driven. You will never have an issue.
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      12-29-2019, 01:58 AM   #186
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Quote:
Originally Posted by drgmt View Post
Stay stock and drive it the way it was meant to be driven. You will never have an issue.
Exactly. I can't put the stock power down to the ground as it is. Why anyone would want 550-600 hp in this car is beyond me. Does not make sense...
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      12-29-2019, 05:10 PM   #187
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Quote:
Originally Posted by dezzracer View Post
Quote:
Originally Posted by drgmt View Post
Stay stock and drive it the way it was meant to be driven. You will never have an issue.
Exactly. I can't put the stock power down to the ground as it is. Why anyone would want 550-600 hp in this car is beyond me. Does not make sense...
Try getting rid of the pilot super sucks if u're still on stock wheel/tires. I have stock sized Re71r and I can put down stage 2 bm3 in 2nd dct in S3 without issues after the tires are warm. I have also tracked (hpde) the Re71 on cs+ map without issues putting the power down also. (GTS diff flash + poly diff bushings are great help)

I feel like the stock CH is more of a random or condition based issue. There are those who slip stock low mileage and there are those who never had an issue with mods. (I'm excluding the big turbo 700+ builds since I feel like there are other factors not just the CH to be worried about).

Personally I have 41k on MY15 daily driven rain/snow and tuned for God knows how long (*knock on wood btw without an issue*). I have over 60 60-130 pulls and a few hpde events.

Things I avoid:

-Highload on low RPM (bad for any car especially cars with low to mid range tq, bad for your rods as well)

-Going wot over bumpy surfaces (bad for your diff/gearbox/suspension)

-Launching (literally bad for everything lol never been a 1/4 guy. I started from the k20/glass tranny world)

-Kickdown* (essentially like going from 5th cruising to 2nd in a manual car without rev match)

PS: these are just my person opinion and experience
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      12-29-2019, 05:24 PM   #188
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Quote:
Originally Posted by 991dc5 View Post
Quote:
Originally Posted by dezzracer View Post
Quote:
Originally Posted by drgmt View Post
Stay stock and drive it the way it was meant to be driven. You will never have an issue.
Exactly. I can't put the stock power down to the ground as it is. Why anyone would want 550-600 hp in this car is beyond me. Does not make sense...
Try getting rid of the pilot super sucks if u're still on stock wheel/tires. I have stock sized Re71r and I can put down stage 2 bm3 in 2nd dct in S3 without issues after the tires are warm. I have also tracked (hpde) the Re71 on cs+ map without issues putting the power down also. (GTS diff flash + poly diff bushings are great help)

I feel like the stock CH is more of a random or condition based issue. There are those who slip stock low mileage and there are those who never had an issue with mods. (I'm excluding the big turbo 700+ builds since I feel like there are other factors not just the CH to be worried about).

Personally I have 41k on MY15 daily driven rain/snow and tuned for God knows how long (*knock on wood btw without an issue*). I have over 60 60-130 pulls and a few hpde events.

Things I avoid:

-Highload on low RPM (bad for any car especially cars with low to mid range tq, bad for your rods as well)

-Going wot over bumpy surfaces (bad for your diff/gearbox/suspension)

-Launching (literally bad for everything lol never been a 1/4 guy. I started from the k20/glass tranny world)

-Knockdown

PS: these are just my person opinion and experience
Thanks 99 good info. When my MPSS wear out, sticky tires are an option. My only negative is the Increased amount of road debris kicked up on the painted areas. . I'm a little anal on paint.
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      12-29-2019, 05:42 PM   #189
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Quote:
Originally Posted by dezzracer View Post
Quote:
Originally Posted by 991dc5 View Post
Quote:
Originally Posted by dezzracer View Post
Quote:
Originally Posted by drgmt View Post
Stay stock and drive it the way it was meant to be driven. You will never have an issue.
Exactly. I can't put the stock power down to the ground as it is. Why anyone would want 550-600 hp in this car is beyond me. Does not make sense...
Try getting rid of the pilot super sucks if u're still on stock wheel/tires. I have stock sized Re71r and I can put down stage 2 bm3 in 2nd dct in S3 without issues after the tires are warm. I have also tracked (hpde) the Re71 on cs+ map without issues putting the power down also. (GTS diff flash + poly diff bushings are great help)

I feel like the stock CH is more of a random or condition based issue. There are those who slip stock low mileage and there are those who never had an issue with mods. (I'm excluding the big turbo 700+ builds since I feel like there are other factors not just the CH to be worried about).

Personally I have 41k on MY15 daily driven rain/snow and tuned for God knows how long (*knock on wood btw without an issue*). I have over 60 60-130 pulls and a few hpde events.

Things I avoid:

-Highload on low RPM (bad for any car especially cars with low to mid range tq, bad for your rods as well)

-Going wot over bumpy surfaces (bad for your diff/gearbox/suspension)

-Launching (literally bad for everything lol never been a 1/4 guy. I started from the k20/glass tranny world)

-Knockdown

PS: these are just my person opinion and experience
Thanks 99 good info. When my MPSS wear out, sticky tires are an option. My only negative is the Increased amount of road debris kicked up on the painted areas. . I'm a little anal on paint.
I have my rockers and high impact areas PPF'ed with xpel. Also by upgrading the tires without going wider in size would not kick up any more debris than ur PSS. The compound alone in the Re71r is a big factor in grip. I am on stock sized 255 front 275 rear Re71r. It will be one of your favorite upgrades I'm sure . The road noise with Re71r is substantially worse in comparison tho.
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      12-29-2019, 05:44 PM   #190
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Shifting down is where the actual problem lies. When you use the kick down you have to also press down on the paddle. Pressing past kick down and down shifting tells the car to downshift straight to the lowest possible gear in the band to give you the maximum amount of torque. When this happens you're sending all the power from the axle back to the engine via the crank. the crank has to spin up all of a sudden from let's say 1500k to 6500-7000k within a few milliseconds. this amount of high force will spin the hub and throw off the timing chain. tuned engines with more torque offer even more power on the crank thus increasing your chances of engine damage instead of just throwing off the chain timing. I was lucky where it only threw off the timing and no engine damage.
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      12-29-2019, 05:45 PM   #191
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Quote:
Originally Posted by 991dc5 View Post
Quote:
Originally Posted by dezzracer View Post
Quote:
Originally Posted by 991dc5 View Post
Quote:
Originally Posted by dezzracer View Post
Quote:
Originally Posted by drgmt View Post
Stay stock and drive it the way it was meant to be driven. You will never have an issue.
Exactly. I can't put the stock power down to the ground as it is. Why anyone would want 550-600 hp in this car is beyond me. Does not make sense...
Try getting rid of the pilot super sucks if u're still on stock wheel/tires. I have stock sized Re71r and I can put down stage 2 bm3 in 2nd dct in S3 without issues after the tires are warm. I have also tracked (hpde) the Re71 on cs+ map without issues putting the power down also. (GTS diff flash + poly diff bushings are great help)

I feel like the stock CH is more of a random or condition based issue. There are those who slip stock low mileage and there are those who never had an issue with mods. (I'm excluding the big turbo 700+ builds since I feel like there are other factors not just the CH to be worried about).

Personally I have 41k on MY15 daily driven rain/snow and tuned for God knows how long (*knock on wood btw without an issue*). I have over 60 60-130 pulls and a few hpde events.

Things I avoid:

-Highload on low RPM (bad for any car especially cars with low to mid range tq, bad for your rods as well)

-Going wot over bumpy surfaces (bad for your diff/gearbox/suspension)

-Launching (literally bad for everything lol never been a 1/4 guy. I started from the k20/glass tranny world)

-Knockdown

PS: these are just my person opinion and experience
Thanks 99 good info. When my MPSS wear out, sticky tires are an option. My only negative is the Increased amount of road debris kicked up on the painted areas. . I'm a little anal on paint.
I have my rockers and high impact areas PPF'ed with xpel. Also by upgrading the tires without going wider in size would not kick up any more debris than ur PSS. The compound alone in the Re71r is a big factor in grip. I am on stock sized 255 front 275 rear Re71r. It will be one of your favorite upgrades I'm sure . The road noise with Re71r is substantially worse in comparison tho.
. I am PPF in those areas as well. Thanks for the valuable input. Love this forum
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      01-05-2020, 05:38 PM   #192
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Is there a poll anywhere for what mileage this occurred at? I just bought my 2016 6MT Comp M3 and wondering if I should take a risk putting a tune on it. It is still under warranty for another 8 months at least! Thanks
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      01-10-2020, 05:39 PM   #193
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Quote:
Originally Posted by Electric View Post
Is there a poll anywhere for what mileage this occurred at? I just bought my 2016 6MT Comp M3 and wondering if I should take a risk putting a tune on it. It is still under warranty for another 8 months at least! Thanks
Mileage is not a factor with SCH occurrences.
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      01-10-2020, 06:07 PM   #194
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Quote:
Originally Posted by stillmatic View Post
Mileage is not a factor with SCH occurrences.
Thank you for responding. I think since I plan on keeping my M3 for a long time and well past the warranty date it would make sense to address this before it does become an issue. Although, one of my good friends is my service writer at BMW, but I dont want to put him in a predicament!
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      01-27-2020, 12:15 PM   #195
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Quote:
Originally Posted by deeldoo View Post
Quote:
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?
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      01-27-2020, 09:59 PM   #196
deeldoo
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Quote:
Originally Posted by QMoney View Post
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Originally Posted by deeldoo View Post
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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?

Damn after rambling i guess you are right I am essentially not driving an automatic at this point, I just don't think agressive kickdowns are good for this car, it's a weak point so my solution is the driving style i highlighted above
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      01-27-2020, 10:04 PM   #197
QMoney
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Quote:
Originally Posted by deeldoo View Post
Quote:
Originally Posted by QMoney View Post
Quote:
Originally Posted by deeldoo View Post
Quote:
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?
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      01-27-2020, 10:06 PM   #198
deeldoo
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Quote:
Originally Posted by QMoney View Post
Quote:
Originally Posted by deeldoo View Post
Quote:
Originally Posted by QMoney View Post
Quote:
Originally Posted by deeldoo View Post
Quote:
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.
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