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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 05-12-2014, 10:46 PM   #1
socalmotoren
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SMG slurring after SMG hard reset by shop.

After my SMG gear positioning sensor was replaced and the shop also performed a hard SMG reset:

When I rolled out from the shop, SMG was slipping/slurring each gear change. It got better after a week but my SMG is still slurring when upshifting. Any thoughts? Thanks in advance!
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Old 05-13-2014, 08:56 AM   #2
silver tongue
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We need more info to help. What caused you to replace the sensor? What were the symptoms? Only when upshifting?
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Old 05-13-2014, 11:54 AM   #3
Cbaty08
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I can tell you I saw a noticeable difference when doing a reset on a cold clutch vs a warm clutch; curious if the car was warm when they did the reset.

Just guessing.
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Old 05-13-2014, 12:15 PM   #4
joeysm3
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Did they use a GT1 tool or inpa to bleed your smg system fully. how did they "reset" your smg system.
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Old 05-13-2014, 01:05 PM   #5
Cbaty08
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Quote:
Originally Posted by joeysm3 View Post
Did they use a GT1 tool or inpa to bleed your smg system fully. how did they "reset" your smg system.
I did it myself using INPA.

I did bleed the clutch beforehand, but I don't think it is necessary unless you actually opened it up..

Doing the option under the advanced menu for the SMG reset should only take 3-5 minutes IIRC.
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Old 05-13-2014, 01:21 PM   #6
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You have to do the full reset. The whole system.
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Old 05-13-2014, 02:05 PM   #7
Cbaty08
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You have to do the full reset. The whole system.
How are you telling.. if you're asking.
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Old 05-13-2014, 03:49 PM   #8
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Im telling u how to do it. Iv done it before for gear position sensor..
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Old 05-13-2014, 04:34 PM   #9
Cbaty08
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Im telling u how to do it. Iv done it before for gear position sensor..
My mistake; I was reading and (for some reason) thought you were the OP asking.
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Old 05-16-2014, 03:10 AM   #10
socalmotoren
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They reset as soon as I came in (warm). Got the car the day prior after the gear position sensor was replaced. The next day my car started skipping gears from 1-3, 2-4. So they decided to reset it. My car still slurs a lil bit. Now the shop is telling me my car may need a new clutch. My car always shifted sharp as a knife even with the bad position sensor. But after the SMG reset my car started slurring /slipping every time I upshift. It's gotten better from the first day of reset but I only drive my car twice - three times a week.
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Old 05-16-2014, 03:35 AM   #11
turbo_f22_pilot
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Clear the adaptations, run a SMG relearn / clutch teach-in. That should teach the transmission where each of the gears are as well as rest the clutch engagement points.
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Old 05-16-2014, 03:44 AM   #12
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Other symptoms of gear skipping if I remember correctly the smg spring(s) could have snapped..but there are a lot of other ones as well like salmon relay, clutch, etc.

I would be weary of this shop if they just want to throw your money at a clutch hoping it solves the problem.
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Old 05-16-2014, 05:58 PM   #13
socalmotoren
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Skipping of the gears is done and fixed after the reset and the SMG teaching etc. Car just slurs during upshift. I'm 100 % certain my SMG slurs was caused by the reset.

Last edited by socalmotoren; 05-16-2014 at 05:59 PM.
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Old 05-17-2014, 02:55 AM   #14
CaptainBMW
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im about to do my own gear position sensor replace, i wasn't aware of any smg reprogram that would need doing. its just a sensor. if i was replacing the clutch i would think it would re-learning

but replace the gear position sensor, i didnt think so.

anybody actually done the replace themselves ?
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Old 05-17-2014, 07:25 AM   #15
joeysm3
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I have. You are going to need to re-teach the system either with inpa or gt1.
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Old 05-17-2014, 10:22 AM   #16
silver tongue
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Quote:
Originally Posted by socalmotoren View Post
Skipping of the gears is done and fixed after the reset and the SMG teaching etc. Car just slurs during upshift. I'm 100 % certain my SMG slurs was caused by the reset.
Not likely, why would a reset cause irreversible damage?
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Old 05-18-2014, 12:33 AM   #17
socalmotoren
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Thanks! I'm considering purchasing a GT1 and learn to perform it myself. I'd rather not deal with that shop anymore. Is it fairly easy to complete this SMG teach/reset?

Quote:
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I have. You are going to need to re-teach the system either with inpa or gt1.
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Old 05-18-2014, 10:49 AM   #18
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It is easy but it takes a while and battery has to be charged.
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Old 05-18-2014, 02:06 PM   #19
socalmotoren
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Thanks Brotha! Perfect I got a battery charger to perform this job. My tech is pretty stubborn when I mentioned that they would need to reset it for the second time and do it properly, I was told they will perform another reset clutch/teach one more time but my tech guy is pretty stubborn that he did everything correctly and supposedly this shop works on Bimmers exclusively, l'd rather not argue and learn how to perform this myself.

Thanks again!




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It is easy but it takes a while and battery has to be charged.
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Old 05-18-2014, 02:34 PM   #20
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Good for you for sticking up for yourself. Its gotta be hard to be a master at anything and think you could be wrong. I hope it works out
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