New info. discovered on steptronic tranny

TRZ06 · 08-14-2007, 01:04 AM

I posted this on another thread, but thought this deserved its own.

If you go back and do a search, you will find that the general consenus is that D starts out in 2nd gear and DS, well there seems to be those who think it starts out in 1st and those who think it starts out in 2nd with just a different throttle map.

Well, I just went out and played with D, DS, & M.

Guess what? D & DS both shifted 5 times (well, DS mode kept me in 5th gear and would not shift into 6th unless positioned back into D mode, nevertheless both modes start in 1st gear) from a stop and I did this several times with several throttle positions. So it would seem that the only difference between D & DS is the throttle maps and shift points, and maybe something else computer related, but definately not gear selection.

Go out and try it yourself (those with Step obviously).

DS & M modes provides about the same acceleration at full throttle, while D mode took a little longer to get going.

The only time the car started out in 2nd, is when I was in M mode and I didn't downshift and came to a complete stop, if you don't downshift into 1st, you will start out in 2nd. Other than that, it's all 1st from a start.

Year's_End · 08-14-2007, 02:59 AM

Interesting...when my car comes in I'll give it a shot. I always thought it was that DS started in 1st and D started in 2nd. I'll try it out in the padre's 6er I guess.

Johnny3 · 08-14-2007, 03:01 AM

can't you guys find any info on this. I'm sure it is written down somewhere....

E90330iS · 08-14-2007, 03:10 AM

Exactly, D will only start on 2nd gear if you have been pampering your E90 for too long!

tctic · 08-14-2007, 03:53 AM

From my experience, both D and DS starts out in first. In D, the transmission just shifts into second before 2k rpm.

In Manual mode, the car starts in 2nd from standstill unless you shifted into 1st prior to starting.

The only time that I recall the transmission will start in 2nd is when the wheels are slipping. ie. on icy/loose surfaces.

There is a pdf explaining all the mappings and the transmission logic/software somewhere on this board. I've been trying to search for it out of the numerous threads but with no luck.

Gripster · 08-14-2007, 09:28 AM

Quote:

Originally Posted by tctic

There is a pdf explaining all the mappings and the transmission logic/software somewhere on this board. I've been trying to search for it out of the numerous threads but with no luck.

Is this the one?

http://www.e90post.com/forums/showth...e60+steptronic

tctic · 08-14-2007, 10:42 AM

Quote:

Originally Posted by Gripster

Is this the one?

http://www.e90post.com/forums/showth...e60+steptronic

yes, it is this one. I guess even though this piece of info is not directly addressed to the E90's, most if not all of the info should apply. Probably what's going to deviate more from this publication is the 335i's ZF transmission.

Vikingus · 08-14-2007, 10:52 AM

weird, feels like DS and M mode starts at 2nd gear, unless you downshift to 1st in M mode. When I start driving in 2nd gear in M mode it really does feel the same as DS mode

Dascamel · 08-14-2007, 12:16 PM

ECU adapts to picks 1st or 2nd gear, people have claimed various combinations based on style of launches.

twin turbo · 08-15-2007, 11:10 AM

Quote:

Originally Posted by tctic

From my experience, both D and DS starts out in first. In D, the transmission just shifts into second before 2k rpm.

This is exactly how my car shifts. You really have to give it a lot of throttle to get it to stay in first gear in "D". I love the way the car shifts in "DS". I wish there was even one more level of sport mode (DS), but I guess that is what the paddles are for.

08-14-2007, 01:04 AM	#1
TRZ06 Lieutenant Colonel 629 Rep 1,753 Posts Drives: 16' M3 Join Date: Apr 2007 Location: Bay Area, CA iTrader: (0)	New info. discovered on steptronic tranny I posted this on another thread, but thought this deserved its own. If you go back and do a search, you will find that the general consenus is that D starts out in 2nd gear and DS, well there seems to be those who think it starts out in 1st and those who think it starts out in 2nd with just a different throttle map. Well, I just went out and played with D, DS, & M. Guess what? D & DS both shifted 5 times (well, DS mode kept me in 5th gear and would not shift into 6th unless positioned back into D mode, nevertheless both modes start in 1st gear) from a stop and I did this several times with several throttle positions. So it would seem that the only difference between D & DS is the throttle maps and shift points, and maybe something else computer related, but definately not gear selection. Go out and try it yourself (those with Step obviously). DS & M modes provides about the same acceleration at full throttle, while D mode took a little longer to get going. The only time the car started out in 2nd, is when I was in M mode and I didn't downshift and came to a complete stop, if you don't downshift into 1st, you will start out in 2nd. Other than that, it's all 1st from a start. __________________ 18? Camaro 2SS 1LE 16' M3 MG Ext. /SO Int. (DCT, Ohlin R/T, 19" wheels) 15' Audi S4 13' Audi TTRS (APR stage 1, MSS springs) 09' C6 Z06 08' M3 Interlagos Blue: 6sp, Tech. Last edited by TRZ06; 08-14-2007 at 01:24 AM..
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08-14-2007, 02:59 AM	#2
Year's_End Lieutenant General 1156 Rep 12,445 Posts Drives: 2020 Shelby GT350 Join Date: Feb 2007 Location: FL iTrader: (0)	Interesting...when my car comes in I'll give it a shot. I always thought it was that DS started in 1st and D started in 2nd. I'll try it out in the padre's 6er I guess. __________________ Past: '08 E92 335i\|ZPP\|ZSP\|6AT Past: '15 Mustang GT\|401A\|PP\|6MT Current: '20 Shelby GT350\|6MT
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08-14-2007, 03:01 AM	#3
Johnny3 Second Lieutenant 12 Rep 294 Posts Drives: Black Sapphire 335i Join Date: Oct 2006 Location: Bellevue, WA;;;San Diego, CA iTrader: (0) Garage List 2007 335i [0.00]	can't you guys find any info on this. I'm sure it is written down somewhere....
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08-14-2007, 03:10 AM	#4
E90330iS Major General 143 Rep 6,333 Posts Drives: BMW M4 Join Date: Jan 2006 Location: Arcadia, California iTrader: (56) Garage List 2006 330i [0.00]	Exactly, D will only start on 2nd gear if you have been pampering your E90 for too long! __________________ 2017 BMW M4 DCT Lease Transfer: https://f80.bimmerpost.com/forums/sh...8#post23736398
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08-14-2007, 03:53 AM	#5
tctic Major 38 Rep 1,238 Posts Drives: BMW E90 Join Date: Oct 2005 Location: Canada iTrader: (0)	From my experience, both D and DS starts out in first. In D, the transmission just shifts into second before 2k rpm. In Manual mode, the car starts in 2nd from standstill unless you shifted into 1st prior to starting. The only time that I recall the transmission will start in 2nd is when the wheels are slipping. ie. on icy/loose surfaces. There is a pdf explaining all the mappings and the transmission logic/software somewhere on this board. I've been trying to search for it out of the numerous threads but with no luck.
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08-14-2007, 10:52 AM	#8
Vikingus Nothing to see here folks 8 Rep 367 Posts Drives: 335i Coupe Join Date: Mar 2007 Location: Queens, NY iTrader: (0)	weird, feels like DS and M mode starts at 2nd gear, unless you downshift to 1st in M mode. When I start driving in 2nd gear in M mode it really does feel the same as DS mode __________________
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08-14-2007, 12:16 PM	#9
Dascamel Lieutenant Colonel 48 Rep 1,664 Posts Drives: 2008 e92 M3, 2010 e91 328i Join Date: Jul 2007 Location: Bakersfield, CA iTrader: (0)	ECU adapts to picks 1st or 2nd gear, people have claimed various combinations based on style of launches. __________________ 2008 E92 M3 Jerez Black,DCT,Fox Red ext,Prem,Tech,19", ipod/usb, CF roof and trim 2010 E91 328i Space Gray,Black int, M sport, most options 2007 Montego Blue 335i (retired)
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