smg issue

///m3phoenix · Sun, Dec-14-2008, 06:45:57 PM

I have a 2002 smg m3 i have had the car for about 8 months now every thing has been awesome. In the last few days every once in a while when i shift not every time it shifts and engages but kinda hesitates to finally fully engage. Could it be the clutch or what?

maddog2020 · Sun, Dec-14-2008, 07:11:15 PM

Are you saying that it disengages and the gear light flashes for longer than you're expecting? I hate to say it, but that sort of sounds like an SMG pump (i.e. low pressure), or maybe an actuator mechanism issue.

Ian

MathiasM3 · Sun, Dec-14-2008, 07:21:15 PM

nah , I had this too, try the relais first! and then a reflash of the software , then start thinking about pumps

maddog2020 · Sun, Dec-14-2008, 07:26:41 PM

Quote:

Originally Posted by MathiasM3

nah , I had this too, try the relais first! and then a reflash of the software , then start thinking about pumps

Quick translation here. Relais = Relay. The SMG relay is a fairly common failure, and is nice and inexpensive to replace.

phoenixm3matt · Sun, Dec-14-2008, 07:38:34 PM

i had exactly the same problem.. tried pump, wasnt that, tried software and relay, wasnt that... turned out to be the gear position sensor on the bottom of the box! once new one fitted everything was fine :-) they start to get a bit stiff with old age..

///m3phoenix · Sun, Dec-14-2008, 11:09:22 PM

thanks for the advice i will have to try that can i change the gear position sensor myself and where should i get it from?

///m3phoenix · Sun, Dec-14-2008, 11:11:11 PM

It doesnt disengage its like it half way engages for a second then fully engages

phoenixm3matt · Mon, Dec-15-2008, 04:13:04 PM

Quote:

Originally Posted by ///m3phoenix

It doesnt disengage its like it half way engages for a second then fully engages

Yep exactly the same! pauses for like 2-3 seconds, gear number light flashing and you have to let off until it engages?

You can fit the sensor yourself but it will need to be programmed in else it wont know it has been replaced, mine was done on autologic!

Real oem - gear identification switch - 23412229792

Hope this helps, loads of people always say pump straight away but I have known it to be this on 5 occasions now!!!

maddog2020 · Mon, Dec-15-2008, 04:23:39 PM

Quote:

Originally Posted by phoenixm3matt

Yep exactly the same! pauses for like 2-3 seconds, gear number light flashing and you have to let off until it engages?

You can fit the sensor yourself but it will need to be programmed in else it wont know it has been replaced, mine was done on autologic!

Real oem - gear identification switch - 23412229792

Hope this helps, loads of people always say pump straight away but I have known it to be this on 5 occasions now!!!

Makes sense. I was one saying "pump", but if there are less expensive options to try, like the relay and the gear position sensor then it definitely makes sense to try those first.

Ian

///m3phoenix · Mon, Dec-15-2008, 08:02:07 PM

Thanks alot for the help guys i will be replacing the gear position sensor very soon!

Sun, Dec-14-2008, 06:45:57 PM	#1
///m3phoenix Registered User Join Date: Jun 2008 Posts: 46 Reputation: 0	smg issue I have a 2002 smg m3 i have had the car for about 8 months now every thing has been awesome. In the last few days every once in a while when i shift not every time it shifts and engages but kinda hesitates to finally fully engage. Could it be the clutch or what? __________________ "A man is only as good as the car that he drives"

Sun, Dec-14-2008, 07:11:15 PM	#2
maddog2020 Registered User Join Date: Apr 2007 Posts: 641 Reputation: 0	Are you saying that it disengages and the gear light flashes for longer than you're expecting? I hate to say it, but that sort of sounds like an SMG pump (i.e. low pressure), or maybe an actuator mechanism issue. Ian __________________

Sun, Dec-14-2008, 07:21:15 PM	#3
MathiasM3 Registered User Join Date: Sep 2008 Posts: 359 Reputation: 0 Location: Belgium	nah , I had this too, try the relais first! and then a reflash of the software , then start thinking about pumps __________________ SOLD: 2003 M3 SMG Estoril Individual 13.01@109mph Bone stock factory freak ESS VT450 @ 6PSI 380 RWHP 11.2 sec 60-130 1 shift / 11.6 2 shifts Current 1998 B5 S4 386whp 9.6 sec 60-130mph 4th gear on 102oct (+400whp)

Sun, Dec-14-2008, 07:38:34 PM	#5
phoenixm3matt Registered User Join Date: Sep 2007 Posts: 59 Reputation: 0 Location: leicester	i had exactly the same problem.. tried pump, wasnt that, tried software and relay, wasnt that... turned out to be the gear position sensor on the bottom of the box! once new one fitted everything was fine :-) they start to get a bit stiff with old age.. __________________

Sun, Dec-14-2008, 11:09:22 PM	#6
///m3phoenix Registered User Join Date: Jun 2008 Posts: 46 Reputation: 0	thanks for the advice i will have to try that can i change the gear position sensor myself and where should i get it from? __________________ "A man is only as good as the car that he drives"

Sun, Dec-14-2008, 11:11:11 PM	#7
///m3phoenix Registered User Join Date: Jun 2008 Posts: 46 Reputation: 0	It doesnt disengage its like it half way engages for a second then fully engages __________________ "A man is only as good as the car that he drives"

Mon, Dec-15-2008, 08:02:07 PM	#10
///m3phoenix Registered User Join Date: Jun 2008 Posts: 46 Reputation: 0	Thanks alot for the help guys i will be replacing the gear position sensor very soon! __________________ "A man is only as good as the car that he drives"

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