DCT Question

mbetoni · 06-14-2013, 10:55 PM

This is for the DCT folks. Having never had one before, not sure what sounds are normal and which aren't.

When I start the car, there's a very slight 1/2 second sound that comes from under the car (I'm assuming its from the tranny) at the very end of the startup sequence. Sounds like gears 'clinking' or 'clanking' (admittedly, hard to describe) and then immediately disappears. Sequence goes: button pressed, engine fires (vahmooommm), then quick 'clink' right after that, then all running smooth. Mind you, that entire thing happens in a mere few seconds.

I'm guessing it's the DCT coming to life, just want to know if others with it hear the same thing. Also, I'm in an enclosed garage, which amplifies everything. I listened for it while outside, and while there, it's MUCH less noticeable. Doubt anyone would hear it if they weren't listening for it when the car's outside.

THanks for any thoughts!

mbetoni · 06-14-2013, 11:09 PM

May have answered my own question. Just listened to two different YouTube videos of an IS starting up - both videos had the sound I'm describing. Seems like it is indeed normal.

mbetoni · 06-15-2013, 03:49 PM

Even though I'm pretty sure it's normal, still curious to hear from other DCT/IS guys. Thoughts?

ManiacGT · 06-15-2013, 04:26 PM

Lots of clink clunk noises from the DCT... More things to worry about in life than mechanical noises unless of course it sounds like it might explode!!

mbetoni · 06-15-2013, 05:11 PM

Quote:

Originally Posted by ManiacGT

Lots of clink clunk noises from the DCT... More things to worry about in life than mechanical noises unless of course it sounds like it might explode!!

HAHAHAHAHA alright, good to know. Coming from a life of manuals (almost 20 years) I guess it will take some getting used to

.

ManiacGT · 06-16-2013, 02:06 AM

Well manuals make some noise too when selecting gears, just the same plus hydraulics on the DCT making them move.

06-14-2013, 10:55 PM	#1
mbetoni First Lieutenant 19 Rep 317 Posts Drives: 2014 Z435is Join Date: Oct 2010 Location: Chicago iTrader: (0)	DCT Question - Startup Sound Normal? This is for the DCT folks. Having never had one before, not sure what sounds are normal and which aren't. When I start the car, there's a very slight 1/2 second sound that comes from under the car (I'm assuming its from the tranny) at the very end of the startup sequence. Sounds like gears 'clinking' or 'clanking' (admittedly, hard to describe) and then immediately disappears. Sequence goes: button pressed, engine fires (vahmooommm), then quick 'clink' right after that, then all running smooth. Mind you, that entire thing happens in a mere few seconds. I'm guessing it's the DCT coming to life, just want to know if others with it hear the same thing. Also, I'm in an enclosed garage, which amplifies everything. I listened for it while outside, and while there, it's MUCH less noticeable. Doubt anyone would hear it if they weren't listening for it when the car's outside. THanks for any thoughts!
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06-14-2013, 11:09 PM	#2
mbetoni First Lieutenant 19 Rep 317 Posts Drives: 2014 Z435is Join Date: Oct 2010 Location: Chicago iTrader: (0)	May have answered my own question. Just listened to two different YouTube videos of an IS starting up - both videos had the sound I'm describing. Seems like it is indeed normal.
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06-15-2013, 03:49 PM	#3
mbetoni First Lieutenant 19 Rep 317 Posts Drives: 2014 Z435is Join Date: Oct 2010 Location: Chicago iTrader: (0)	Even though I'm pretty sure it's normal, still curious to hear from other DCT/IS guys. Thoughts?
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06-15-2013, 04:26 PM	#4
ManiacGT Major 85 Rep 1,448 Posts Drives: Z4 sDrive 35i Join Date: Jan 2011 Location: Manchester, UK iTrader: (0)	Lots of clink clunk noises from the DCT... More things to worry about in life than mechanical noises unless of course it sounds like it might explode!!
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06-16-2013, 02:06 AM	#6
ManiacGT Major 85 Rep 1,448 Posts Drives: Z4 sDrive 35i Join Date: Jan 2011 Location: Manchester, UK iTrader: (0)	Well manuals make some noise too when selecting gears, just the same plus hydraulics on the DCT making them move.
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