Steptronic trans will not downshift in Manual

Matt Cutchin · 01-18-2010, 09:31 PM

I have a 2006 325i. When I switch it into SM and try to downshift it won't. It WILL shift up but never down regardless of current gear. Any ideas?

Thanks

nyc3r · 01-18-2010, 09:48 PM

Try doing at low speed. Computer will limit downshift based on speed but you should be able to downshift from any gear. if not, could just be a bad connection on the shift controller by your shift boot.

Matt Cutchin · 01-18-2010, 10:20 PM

Yes it won't downshift at any speed when I tell it to. What kind of connection is there? Is it something I can replace or repair? and how much?

JayKay335i · 01-18-2010, 11:10 PM

Sounds like a bad connection. Not sure exactly how the wires are connected to the shift knob or what the mechanism is for switching gears with it.

e60_M5_2020 · 01-18-2010, 11:40 PM

Maybe TSB B 24 13 07?

"Various complaints associated with inoperative transmission controls."

Example:
Transmission Connector X8500, pin 14 is slightly pushed back causing a poor connection.

http://www.bmwtis.com/tsb/bulletins/...p/b241307g.htm

Nr!qUe · 01-19-2010, 07:11 AM

take it in

E90PAT · 09-16-2015, 12:32 PM

Did you ever figure out this problem?

Im having the same thing.

Squark · 09-16-2015, 01:03 PM

If you use DS or M modes often, wires attached to the shifter stress and break. See this thread for a video that explains what to look for and how to fix it:
http://www.e90post.com/forums/showthread.php?t=842645

Wilt · 09-16-2015, 01:18 PM

Quote:

Originally Posted by Squark

If you use DS or M modes often, wires attached to the shifter stress and break. See this thread for a video that explains what to look for and how to fix it:
http://www.e90post.com/forums/showthread.php?t=842645

^^^

01-18-2010, 09:31 PM	#1
Matt Cutchin New Member 5 Rep 5 Posts Drives: 2006 BMW 325i Join Date: Apr 2009 Location: DFW Texas iTrader: (0)	Steptronic trans will not downshift in Manual I have a 2006 325i. When I switch it into SM and try to downshift it won't. It WILL shift up but never down regardless of current gear. Any ideas? Thanks
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01-18-2010, 09:48 PM	#2
nyc3r Colonel 112 Rep 2,589 Posts Drives: E90 Join Date: Jun 2006 Location: USA iTrader: (24)	Try doing at low speed. Computer will limit downshift based on speed but you should be able to downshift from any gear. if not, could just be a bad connection on the shift controller by your shift boot. __________________ FS: Interior Parts - Msport knob, split armrest etc FS: Interior Parts Msport wheel, Msport knob, Boot, Idrive, FS: BMW factory oil change kit
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01-18-2010, 10:20 PM	#3
Matt Cutchin New Member 5 Rep 5 Posts Drives: 2006 BMW 325i Join Date: Apr 2009 Location: DFW Texas iTrader: (0)	Yes it won't downshift at any speed when I tell it to. What kind of connection is there? Is it something I can replace or repair? and how much?
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01-18-2010, 11:10 PM	#4
JayKay335i Banned 189 Rep 5,046 Posts Drives: ///M323 DCT Join Date: Apr 2009 Location: North Dakota; its best DUHHHHHH iTrader: (1)	Sounds like a bad connection. Not sure exactly how the wires are connected to the shift knob or what the mechanism is for switching gears with it.
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01-18-2010, 11:40 PM	#5
e60_M5_2020 Private First Class 24 Rep 150 Posts Drives: MB C Class Join Date: Aug 2009 Location: Boston iTrader: (0)	Maybe TSB B 24 13 07? "Various complaints associated with inoperative transmission controls." Example: Transmission Connector X8500, pin 14 is slightly pushed back causing a poor connection. http://www.bmwtis.com/tsb/bulletins/...p/b241307g.htm
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01-19-2010, 07:11 AM	#6
Nr!qUe Captain 70 Rep 975 Posts Drives: 2009 E90 LCI 328i 6MT Join Date: Nov 2008 Location: Miami, FL iTrader: (3)	take it in __________________ 2009 BMW E90 328i \| Xenons \| MT \| Space Gray \| Beige-ette \| CF Fabric Trim \| iPod/USB \| 20% Tints \| Euro-Plate \| Rear Fog Switch Lego Mod \| Painted Reflectors \| Performance Short-shift Kit \| Style 197 Wheels \| OEM Sport Suspension \|
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09-16-2015, 12:32 PM	#7
E90PAT SOFLO CODING 199 Rep 3,587 Posts Drives: Z4M Join Date: Apr 2009 Location: SoFla iTrader: (18)	Did you ever figure out this problem? Im having the same thing.
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09-16-2015, 01:03 PM	#8
Squark Private First Class 6 Rep 120 Posts Drives: 2007 328i Join Date: Dec 2011 Location: North Carolina iTrader: (0)	If you use DS or M modes often, wires attached to the shifter stress and break. See this thread for a video that explains what to look for and how to fix it: http://www.e90post.com/forums/showthread.php?t=842645
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