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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 09-30-2013, 11:46 AM   #1
M3driv3r
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Join Date: Dec 2012
Location: Chicago
Posts: 13
My Ride: Carbon black e46 m3
SMG to 6 speed Swap

Hey guys so i know there are a few write ups on this topic, but we conquered the project so we figured we would share it with you! 2001 Steel Grey on Cinnamon M3 (SMG) rid of the the flappy paddles, with a 6 speed put in. Some small stuff like air box removal and self explanatory things aren't documented.

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We first started by removing all the smg components. We removed the exhaust, driveline, transmission, smg pump, air box, air plenum, actuator, and flappy paddles.

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Once all SMG components were out we had to split open the transmission, and have the bell housing machined. At this point you could choose to use a 6 speed bell housing but we didn't want to go that route. We machined hers to replicate the dowel, bearing, and spring in the manual trans that allows for centering of the shifter and not allow play left to right.

Pre machining SMG bellhousing:
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Post Machining SMG bellhousing (replicates manual)
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Once the transmission was machined, the fun part began.....putting the car back together and getting it road worthy!
We put the new clutch, pressure plate, bearings, and machined flywheel back on the car

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The transmission was now installed with the new slave.

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We then drilled a hole into the center tunnel to allow the shifter linkage to be installed, and installed the rubber boot, shifter arm, and linkage.

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Once the linkage and shifter were installed, we put the rest of the car back together. Airbox, plenum, driveline and exhaust.

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The final part of the swap was electronics. Autologic was used to code the car. The DME was reprogramed using new numbers for a manual car. Systems that got updated included ABS, EWS, DME, DSC, instrument cluster and a few other odds and ends. We chose to bypass the neutral safety switch and not have functioning cruise control. The car has been picked up and driven for about a week now and we have had no issues regarding the swap.

Hope you guys enjoyed the write up.

Last edited by tim330i; 10-03-2013 at 05:29 PM. Reason: Auto-save 1380839346
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Old 09-30-2013, 10:58 PM   #2
vens1000
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Join Date: Sep 2013
Location: Toronto
Posts: 9
My Ride: a car
Re: SMG to 6 speed Swap

Oh man awesome work!!

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Old 10-01-2013, 12:55 PM   #3
M3driv3r
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Join Date: Dec 2012
Location: Chicago
Posts: 13
My Ride: Carbon black e46 m3
SMG to 6 speed Swap

Thank you!


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Old 10-03-2013, 10:48 AM   #4
Bino5150
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Join Date: Feb 2013
Location: Houston, TX
Posts: 176
My Ride: 99 323i
Nice work... Remember, if they ain't hatin on ya, then you ain't doin ****.
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Old 05-28-2016, 07:33 AM   #5
s3MovenUp
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Join Date: Jul 2013
Location: Maryland
Posts: 15
My Ride: 05 E46 M3, 2003.5 M3
What was the cost if you don't mind me asking?
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Old 06-01-2016, 09:09 PM   #6
05SMG
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Join Date: Nov 2015
Location: Space Coast Florida
Posts: 190
My Ride: E46 330ci M sport
Did you buy a kit that provided the shift linkage, third pedal etc? And was it difficult to find a shop that had experience doing the swap?
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Old 06-15-2016, 12:56 PM   #7
DabbinDD
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Join Date: Jul 2015
Location: Los Angeles, CA
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My Ride: 01 BMW 330ci
Awesome work guys, living an SMG owners dream
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