DCT: Transmission Mode "6"

aajami · 05-09-2012, 04:04 PM

Given that S6 decreases clutch slip times, the argument can be made that it's better on your transmission (it's certainly better on your clutches) than the slower modes. Does it wear out the drivetrain faster? Maybe, but doubtful. Does it wear out the tires faster? Absolutely.

FLOSS M · 05-10-2012, 10:33 AM

Some of the above has to be true- however I am sure BMW built these cars to handle it. I agree that launch control can not be good for the drivetrain.
You have to love the tire chirping shifts though!!!

RussRamz · 05-10-2012, 02:27 PM

Quote:

Originally Posted by aajami

Given that S6 decreases clutch slip times, the argument can be made that it's better on your transmission (it's certainly better on your clutches) than the slower modes. Does it wear out the drivetrain faster? Maybe, but doubtful. Does it wear out the tires faster? Absolutely.

I agree. The only way the clutch will suffer more wear in S6 is during acceleration using launch control.

alpine335i · 05-10-2012, 03:30 PM

wear this out wear that out...who cares live life and enjoy the car if it breaks just remember its a luxury problem

OC3 · 05-10-2012, 04:05 PM

^+1

Verify · 05-11-2012, 07:19 PM

I believe some info in here is wrong. The faster and harder a transmission shifts, the less wear it puts on it. The longer its engaging, the more heat and "partial" friction, wearing down the material at a faster rate.

Porschefile · 05-12-2012, 09:55 AM

Quote:

Originally Posted by Baggy_M

I believe some info in here is wrong. The faster and harder a transmission shifts, the less wear it puts on it. The longer its engaging, the more heat and "partial" friction, wearing down the material at a faster rate.

You are assuming clutch wear and transmission wear are synonymous. Faster shifts are easier on the clutch at the expense of the rest of the gearbox and vice versa. But at the end of the day none of us really have hard data backing up how much life you take from the trans by using S6 or how much life you take from the clutches by using S1.

Slamming into the next gear is easy on the clutch but stressful to the gears.

Verify · 05-14-2012, 08:01 AM

Quote:

Originally Posted by Porschefile

You are assuming clutch wear and transmission wear are synonymous. Faster shifts are easier on the clutch at the expense of the rest of the gearbox and vice versa. But at the end of the day none of us really have hard data backing up how much life you take from the trans by using S6 or how much life you take from the clutches by using S1.

Slamming into the next gear is easy on the clutch but stressful to the gears.

I see your point, but i have never seen an issue of gears being worn out in anything less than 1000 HP racing specific applications. I think we see/mean the same thing though. for a street vehicle, id be more sorried about the clutches on my car, since that will go earlier and more likely

05-09-2012, 04:04 PM	#23
aajami Brigadier General 432 Rep 4,567 Posts Drives: Space Gray '09 E92 M3 Join Date: Dec 2008 Location: Manhattan Beach, CA iTrader: (4)	Given that S6 decreases clutch slip times, the argument can be made that it's better on your transmission (it's certainly better on your clutches) than the slower modes. Does it wear out the drivetrain faster? Maybe, but doubtful. Does it wear out the tires faster? Absolutely. __________________ '09 E92 M3: Space Gray, Black, Carbon Leather \| ZTP 2MK ZPP 2MT 6FL \| link 1 / link 2 Mods: M Performance exhaust \| ZCP retrofit \| Euro airbox \| GTS DCT flash \| JPN 240 ECU flash \| Euro LCI taillights \| CRT lip \| OEM alarm retrofit \| Space Gray bumper plugs \| BMW Performance: Mk. II spoiler / Mk. II non-electronic steering wheel / mirror caps / front grilles / side gills / intake louvers / emblem
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05-10-2012, 10:33 AM	#24
FLOSS M ///M3 386 Rep 1,123 Posts Drives: 22 M3 X-Drive Join Date: May 2008 Location: NJ iTrader: (1)	Some of the above has to be true- however I am sure BMW built these cars to handle it. I agree that launch control can not be good for the drivetrain. You have to love the tire chirping shifts though!!!
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05-10-2012, 03:30 PM	#26
alpine335i Captain 44 Rep 687 Posts Drives: 08 e92 M3 6MT, 08 e90 328xi Join Date: Nov 2006 Location: Poughkeepsie, NY iTrader: (2)	wear this out wear that out...who cares live life and enjoy the car if it breaks just remember its a luxury problem __________________ 2008 Alpine White E92 ///M3
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05-10-2012, 04:05 PM	#27
OC3 Havin' a blast! 125 Rep 4,847 Posts Drives: 2013 M3 E92 Jerez Blk DCT ZCP Join Date: Nov 2010 Location: SoCal iTrader: (1)	^+1 __________________ BRP 1:56 \| CVR 2:01 \| ACS 1:53 \| WSIR 1:34
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05-11-2012, 07:19 PM	#28
Verify Captain 23 Rep 638 Posts Drives: M3 Join Date: Mar 2012 Location: MD-NY iTrader: (1)	I believe some info in here is wrong. The faster and harder a transmission shifts, the less wear it puts on it. The longer its engaging, the more heat and "partial" friction, wearing down the material at a faster rate.
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