Our future: swap SMG for 6-speed manual? - Page 19 - BMW M5 Forum and M6 Forums
E60 M5 and E61 M5 Touring Discussion 2005- Advertiser's Forum

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post #181 of 239 Old 18th July 2018, 02:54 AM
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post #182 of 239 Old 18th July 2018, 06:55 AM
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post #183 of 239 Old 20th July 2018, 04:01 AM
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Quote:
Originally Posted by CHARIOT View Post
It's almost time for the best part!
I forgot to ask you, when you swapped yours did you end up getting harmonic resonance / vibration around 1400 and 2100 rpm? I still haven't been able to track that one down

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post #184 of 239 Old 20th July 2018, 03:26 PM
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Quote:
Originally Posted by pmalik View Post
I forgot to ask you, when you swapped yours did you end up getting harmonic resonance / vibration around 1400 and 2100 rpm? I still haven't been able to track that one down

https://www.m5board.com/vbulletin/e6...dder-puma.html
https://www.m5board.com/vbulletin/e6...lp-please.html
https://www.m5board.com/vbulletin/e6...speed-m5s.html
Yes. If I'm sitting at idle and I give a little gas, I get a little harmonic vibration that steadily gets worse until it hits ~2k rpm then it suddenly smoothes out beyond that. I ended up using the LUK flywheel/pressure plate. You?

DIY: E60 M5 SMG to 6MT Conversion:https://www.m5board.com/vbulletin/e6...-manual-2.html

Last edited by CHARIOT; 20th July 2018 at 03:27 PM.
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post #185 of 239 Old 20th July 2018, 03:34 PM
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Quote:
Originally Posted by CHARIOT View Post
Yes. If I'm sitting at idle and I give a little gas, I get a little harmonic vibration that steadily gets worse until it hits ~2k rpm then it suddenly smoothes out beyond that. I ended up using the LUK flywheel/pressure plate. You?
Interesting, I get the same harmonic resonance at two frequencies (1400 and 2000) - it must be the manual flywheel. My wife's SMG doesn't get any of these harmonics.

Edit:
A bit more googling
SMG dual mass flywheel (21212229955) is 14.4kg
Manual dual mass flywheel (21212283060) is 13.6kg

Some quick math, the flywheel weight difference alone doesn't shift the resonance nearly enough. Does anyone know the weight diff between the SMG and manual transmissions?

Code:
> k_stiffness = 13.6*(1400)^2*4*pi^2
> new_freq = (1/(2*pi))*sqrt(k_stiffness/14.4)
> new_freq
[1] 1360.555
How can I avoid resonance?

Last edited by pmalik; 20th July 2018 at 05:18 PM.
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post #186 of 239 Old 13th August 2018, 07:05 PM
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Steering Wheel and Underbody Cover

Question. Does the steering wheel HAVE to be changed? Or can I just use the old steering wheel with the paddle shifts just sitting there, looking pretty? Also, would there be any harm in running without the underbody cover 51758042223? I cannot locate one below several hundred dollars.

Thanks,
Ross.
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post #187 of 239 Old 14th August 2018, 02:09 AM
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No you do not have to change the steering wheel. I had mine swapped from a smg to a 6speed. I still have the old wheel just with the paddles removed. You can feel where the paddles went on the back of the wheel but only if you're looking for them.
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post #188 of 239 Old 15th August 2018, 07:02 AM
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So I've been pretty quiet again as usual. Haven't had much time to tinker with the project. However, I have stockpiled together the clutch, dual mass flywheel, all the miscellaneous hardware, received E90 M3 transmission oil cooler lines, driveshaft, and a few little other things.

However, maybe someone can give some insight on this but I flashed and coded the car to the 2MA software and seem to have only one real issue. My "brake" light is on all the time and is yellow. When I pulled up my scan tool, I get the following error message. "DSC D378, Message (FRMFA, 0X944) faulty (reverse gear switch) receiver DSC, transmitter DME-DDE"

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I've checked my wiring from the DME and DSC and seem to come to an impasse on what this might mean. Not sure why it says reverse switch? The MDM button still switches on and off the DSC and there is no ABS, DSC lights on. Just the yellow brake light in the dash. Trying to figure this out but if anyone has seen this code before, could you share some insight?

This weekend, I will be trying to install the flywheel, clutch and mounting the transmission into the car. More progress to come, stay tuned folks!

Last edited by iDev326; 15th August 2018 at 07:03 AM.
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post #189 of 239 Old 15th August 2018, 02:40 PM
GabrielD
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Hey idev, when I had the swap done the shop had the same problem. The brake light being yellow is a bit annoying but does not seem to cause any other problems and I'm still able to pass state inspections (Texas). Not sure what causes it but would be interested to know if you manage to fix it.

Another problem is I would often get the "start on/off assistance malfunction" warning (dont remember the code) but it seems to happen intermittently.
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post #190 of 239 Old 19th August 2018, 10:29 AM
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GabrielD - I actually managed to fix the issue on my car. So what I ended up doing was using NCS Expert and re-coding every module of the car with the 2MA option software. Once I did that, the error code went away and haven’t seen it since. I think what happened was I never properly coded the car and the DSC software was possibly looking for signals from the SMG ecu that is no longer there. Either way, I’d try re-coding the car using NCS Expert and go from there.

I got the 6-speed flywheel and clutch in and torqued on. That flywheel is HEAVY and AWKWARD to get into place. A second set of hands may help. Realize that there is a dowel on the crankshaft that a larger flywheel hole with slot into. You need to get this right otherwise the flywheel will not sit properly and can cause serious damage. Torque to 105nm.

Getting the clutch was also a bit of a hassle as well imo. It’s an odd type that it has splines inside the pressure plate that line up with the clutch disk. If these aren’t lined up prior to mating it up to the flywheel, you will have a hard time trying to get the pins on the flywheel lined up with the holes on the pressure plate. Make sure your clutch comes with the alignment tool that has the detachable bolt. Once that is done, torque the pressure plate to 10nm+2nm. You will then remove the 14mm allen lock ring. Take out the alignment tool.

It’s been a long night but I got it on and ready to prep the trans tomorrow. More on this shortly!
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