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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 06-25-2013, 07:43 PM   #1
Ballerbrian4u
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Smg shifting rough

Hey guys my smg is acting weird for a while now. The shifts are not smooth and crisp. When auto downshifting into 2 it jerks. In s4 s5 when shifting at low rpms around 2k I hear it slam into gear and clunk from the rear of the car.Also when downshifting in any gear it delays in grabbing the gear. It is not the same as day one. Any tips? I did the Adaptaion 4 months ago should I try that again?
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Old 06-25-2013, 07:49 PM   #2
Redman M3
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Smg shifting rough

First thing to do is an SMG reset, using your shifter paddles.

The symptoms of the clunk noise can be due to the propshaft coupling located by the gearbox which requires changing as these tend to crack a lot hence mechanical sounds and clunks when changing up or down.

If you are experiencing any juddering this will mean a new flywheel is required and while you are at it maybe beat to change the clutch.

All of the above changes will bring your car back to the way the m3 SMG should operate.

HTH


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Old 06-25-2013, 07:52 PM   #3
Ballerbrian4u
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Hey thanks. My car just hit 50,000 miles. I do the reset 1 everyday if No traffic.
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Old 06-25-2013, 08:53 PM   #4
Moosecakes
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My car "slams" 1st to 2nd shift too in s5. I daily in it and if you regulate your throttle a bit you can fix most of it, not lifting causes a louder harsher clunk. But Driveline bushings and rubber is always a good thing to check I need to do my guibo, csb and bearing one of these days.

Definitely reset it and your throttle adaptions so you have a clean driving slate to go from. I just reset both my smg and throttle adaptions and holy hell it made a very nice difference in shift speed, gear grabbing on downshifts and I swear 1st to 2nd shifts smoother without lifting.
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Old 06-26-2013, 07:08 PM   #5
djantlive
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how do you reset the smg?
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Old 06-26-2013, 07:35 PM   #6
Moosecakes
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Driving 40mph+ move stick to N, pull both paddles back at the same time for 10 seconds, release, and put stick back in gear. No indicators will flash, some people say 4-5 seconds, some say 10, I just did it for 10 seconds and definitely noticed a change, my wife did as well, she said it felt quicker when I shifted and the rough 1-2 shift wasn't quite as harsh.
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Old 06-27-2013, 12:26 PM   #7
Ballerbrian4u
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Quote:
Originally Posted by Redman M3 View Post
First thing to do is an SMG reset, using your shifter paddles.

The symptoms of the clunk noise can be due to the propshaft coupling located by the gearbox which requires changing as these tend to crack a lot hence mechanical sounds and clunks when changing up or down.

If you are experiencing any juddering this will mean a new flywheel is required and while you are at it maybe beat to change the clutch.

All of the above changes will bring your car back to the way the m3 SMG should operate.

HTH


Sent from BimmerApp mobile app
I think I might have a bad propshaft coupling. I say this because the is a loud vibration at 1900 rpms. How can I check it? Is it under the heat shields.
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Old 06-28-2013, 01:14 PM   #8
Moosecakes
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Yes you'll have to drop section 1 and 2 I believe then remove the heat shields to get to your driveshaft. Speaking of, I need to put that on my list of **** to order for a quick maint, run when I get some money together haha.
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Old 06-28-2013, 02:42 PM   #9
new//M3fan
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Quote:
Originally Posted by Redman M3 View Post
If you are experiencing any juddering this will mean a new flywheel is required and while you are at it maybe beat to change the clutch.
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not true, it simply means that the clutch slip point needs to be relearned and the clutch curve adaptation reset with Gt1 or autologic equipment.
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Old 06-28-2013, 06:57 PM   #10
Ballerbrian4u
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Originally Posted by new//M3fan View Post
not true, it simply means that the clutch slip point needs to be relearned and the clutch curve adaptation reset with Gt1 or autologic equipment.
Hey do I need to do those in any specific order? Adaptaion first?
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Old 06-28-2013, 07:17 PM   #11
turbo_f22_pilot
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You perform the basic SMG reset with the paddles first. If that doesn't correct shifting, then try the adaptation reset (GT1 / AutoE / ...). Followed by a clutch relearn is studder is still present. Also if doing a relearn, might as well clear throttle adaptations while you're at it.
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Old 06-28-2013, 07:48 PM   #12
Ballerbrian4u
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One question I just orders a guibo because of the vibration and couch noises. Do I also need to replace my center support bearing? What is that?
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Old 06-28-2013, 08:02 PM   #13
Ballerbrian4u
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Also what's a cv joint ? Witch one do I need to replace?
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Old 06-28-2013, 10:55 PM   #14
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Here ya go . . .

RealOEM is your friend


http://realoem.com/bmw/showparts.do?...00&hg=26&fg=05

http://realoem.com/bmw/showparts.do?...97&hg=26&fg=10
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Get your "M" on . . .
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CAR:
2003 TIAG Coupe / Blk Interior / SMG / HK Premium
MODS:
EU-CSL Coded / Macht Schnell intake / OEM CSL Wheels / OEM CSL Diffuser / Dinan Exhaust
Full LED Conversion / HID fog / Aurora AE / RE RTAB FCAB

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Old 06-28-2013, 10:57 PM   #15
Moosecakes
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You can replace the CSB and mount if you want to, personally I'm going to because i'll be in there anyway doing the guibo. It's like 80$ or something for the mount and bearing I think.

Dont worry about CV joints and ****, guibo, csb and mount are the big driveline items that need addressing.
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Old 07-05-2013, 04:43 PM   #16
M3/805
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I just did my center support bearing and drive shaft plate(guibo) to trans,it was $200.00 for parts at turners!!!
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Old 07-07-2013, 12:53 AM   #17
BioHazard2312
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I'm having a similar issue with rough shifting. If I have an evolve SMG tune will it affect that when I do the SMG reset?
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Old 07-08-2013, 07:03 PM   #18
turbo_f22_pilot
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Quote:
Originally Posted by BioHazard2312 View Post
I'm having a similar issue with rough shifting. If I have an evolve SMG tune will it affect that when I do the SMG reset?
No, it will not. A reset will only reset the learned values. (the adaptation values, what the system uses to mimic your driving style)
__________________
In order to finish FIRST, you MUST first FINISH !

Joy is future proof
Get your "M" on . . .
Reading is FundaM3ntal




CAR:
2003 TIAG Coupe / Blk Interior / SMG / HK Premium
MODS:
EU-CSL Coded / Macht Schnell intake / OEM CSL Wheels / OEM CSL Diffuser / Dinan Exhaust
Full LED Conversion / HID fog / Aurora AE / RE RTAB FCAB

BMWCCA NCC
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Old 07-08-2013, 07:23 PM   #19
BioHazard2312
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Originally Posted by turbo_f22_pilot View Post
No, it will not. A reset will only reset the learned values. (the adaptation values, what the system uses to mimic your driving style)
Thanks.
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Old 02-07-2014, 10:31 PM   #20
crossle23
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Moosecakes thanks for the tips on the adaptive reset! Just bought an'02 smg and that definitely helped it shift better.
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