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Discussion Starter #1
Hey All,

I'm going to use an SMG tranny to replace my manual transmission in my car (I'm keeping the car manual of coarse). I figure the syncros will be in much better condition because the shifts were computer controlled. What parts do I need so that I can make this happen?
 

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You will reuse the bell housing from 6mt onto the smg tranny.

You will need to tap a hole for the gear position sensor and add a pin there - this is where the blind tapered plug is on the smg. Once you tap a hole with a bottoming m14x1.5 tap, you will insert items 8,9,10 there and then screw on #11, which is the gear position sensor itself from the link below.

https://www.realoem.com/bmw/enUS/showparts?id=BL93-USA-07-2005-E46-BMW-M3&diagId=23_0887

Look at pages 10-11 here too:https://drive.google.com/file/d/1WpFk702tzPiG1fdipFcY5I6B2QU-U637/view?usp=drivesdk

Sent from my SM-G950U using Tapatalk
 

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u might watch wheeler dealer show, they did a conversion

Hey All,

I'm going to use an SMG tranny to replace my manual transmission in my car (I'm keeping the car manual of coarse). I figure the syncros will be in much better condition because the shifts were computer controlled. What parts do I need so that I can make this happen?
However, IIRC they didn't have to change the bell housing. They simply disconnected the SMG stuff and hooked up a manual shifter. You might have to google wheeler dealer tv show and bmw smg conversion.

https://www.youtube.com/watch?v=yM7zmM6sAQE
 

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However, IIRC they didn't have to change the bell housing. They simply disconnected the SMG stuff and hooked up a manual shifter. You might have to google wheeler dealer tv show and bmw smg conversion.

https://www.youtube.com/watch?v=yM7zmM6sAQE
They left a LOT of information out of that video for some reason. That rubs me, and a lot of others the wrong way because it shows incomplete steps and makes it look a lot easier and quicker than it actually is. Especially since they started with an SMG car, they need to also do coding, etc.

There are several options for how the shift lever can be centered between the gates (R, 1-2, 3-4, 5-6) when using a box from SMG on a manual. One is swapping the bellhousing from a manual, one is machining the smg bellhousing, one is installing a self centering shifter like CAE which does not require bellhousing modification.

On the bellhousing, what keeps the shifter centered in a manual, are items 1-6 on the diagram, they don't exist on the smg:
https://www.realoem.com/bmw/enUS/showparts?id=BL93-USA-07-2005-E46-BMW-M3&diagId=23_0887

Sent from my SM-G950U using Tapatalk
 

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There are several options for how the shift lever can be centered between the gates (R, 1-2, 3-4, 5-6) when using a box from SMG on a manual. One is swapping the bellhousing from a manual, one is machining the smg bellhousing, one is installing a self centering shifter like CAE which does not require bellhousing modification.
this is the correct info. I have a manual swapped E46 M3.
 

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I did this, the synchros were in great shape, this is a great option for a failing 6 speed, I did exactly what Mr Gizmo above said, reused my bell housing from the bad 6mt, and tapped the hole for the gear position sensor and installed the 6mt parts in there, I recommend a tap set to use for the tapping, you need a bottoming tap to reach the bushing in there, there is a set of 3 taps on amazon:

Recommend you use the sealer this video uses:
 

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Keep matching bell housings to each box and don't mix them up, to avoid trouble of having noisy and bad input shaft bearing. Modify the msg bell housing instead.
 

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Discussion Starter #8
You will reuse the bell housing from 6mt onto the smg tranny.

You will need to tap a hole for the gear position sensor and add a pin there - this is where the blind tapered plug is on the smg. Once you tap a hole with a bottoming m14x1.5 tap, you will insert items 8,9,10 there and then screw on #11, which is the gear position sensor itself from the link below.

RealOEM.com - Online BMW Parts Catalog

Look at pages 10-11 here too:DIY_ Comprehensive SMG to 6MT Conversion Thread - BMW M3 Forum.com (E30 M3 _ E36 M3 _ E46 M3 _ E92 M3 _ F80_X).pdf

Sent from my SM-G950U using Tapatalk
Do I need to buy #11?
 
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