SMG to 6MT Conversion

[sapote]

I wish I had the time, energy, and skills to DIY. Going thru a shop, I’m looking at paying $3400-4100 for the swap in Texas with me providing an AS SSK and stock shift knob.

Make sure to use your BH and don't swap with another modified BH.

[SQ13]

I wish I had the time, energy, and skills to DIY. Going thru a shop, I’m looking at paying $3400-4100 for the swap in Texas with me providing an AS SSK and stock shift knob.

[pawelgawel]

yes Ill be using the diff plugs for the caps, unless I figure out a way to machine the C clip goove. I though of maybe using dremel tool, but I think im asking for trouble that way.

[sapote]

just wondering what size of bits are being used to get the proper bore. The sketch going around shows 18mm though with a 16.2mm lip on the inside. WILE Motorsport told me they bore out a 17mm through 1st and then use 18mm but leave about 1-2mm lip to keep the bushing in. Ive never done anything like this but I imagine there will be a little bit of a leeway on the .x0mm so Im curious to what people are using.

17mm lip or 16.2mm is fine – just for stop the sleeves from falling inside. 16.2 gives more lip but I don’t think it’s necessary. Measure your sleeves to make sure they are not loose inside the 18mm bores – a little interference is better to avoid sleeve sliding leading to wear on the soft aluminum bore.

It seems you have no capacity for machining the locking C-clip grooves, then what is your method for capping/sealing the holes? I suggest using the differential drain bolts,but don’t let it bottomed on the sleeve.

I think the 18mm, or whatever it is, needs to be precise to have the sleeves press-fit and avoid them sliding and worn holes. Everything else is not that precise.

[pawelgawel]

I have access to machine shop and had planned out what to do, but had not done yet. What do you want to know?

just wondering what size of bits are being used to get the proper bore. The sketch going around shows 18mm though with a 16.2mm lip on the inside. WILE Motorsport told me they bore out a 17mm through 1st and then use 18mm but leave about 1-2mm lip to keep the bushing in. Ive never done anything like this but I imagine there will be a little bit of a leeway on the .x0mm so Im curious to what people are using.

[sapote]

anyone here machine the housing themselves?
Decided to purchase a drill press for my dads shop, figured it'll come in handy for many things anyways.. would like to see if anyone had done this and if there was any issues along the way

I have access to machine shop and had planned out what to do, but had not done yet. What do you want to know?

[pawelgawel]

thanks!

[oceansize]

anyone here machine the housing themselves?
Decided to purchase a drill press for my dads shop, figured it'll come in handy for many things anyways.. would like to see if anyone had done this and if there was any issues along the way

Seems like sapote did. Also this guy https://nam3forum.com/forums/forum/m...pdate-and-pics

[pawelgawel]

anyone here machine the housing themselves?
Decided to purchase a drill press for my dads shop, figured it'll come in handy for many things anyways.. would like to see if anyone had done this and if there was any issues along the way

[sapote]

I will

[S3diment]

If I post my google doc with the parts, FCPEuro link, and price would anyone be open to checking it for accuracy? Really checking for those parts that are OOS or superseded.

[pawelgawel]

for the Canadians out there, since most distributors will not ship small items like this to us, here is a link to the Canadian distributor for the bearing and spring.

Bearing: https://www.grainger.ca/en/product/B...analytics=cart.
https://www.bearingscanada.com/608-N...pan-8x22x7.htm
Spring : https://www.grainger.ca/en/product/T...analytics=cart

[pawelgawel]

found this today for anyone having same questions

https://www.mforum.net/forum/e90-m3-sedan-e92-m3-coupe-e93-m3-convertible-2008-2013/diy-ab/511-diy-smg-to-6mt-bellhousing-and-transmission-modification-revised-2020

[pawelgawel]

fcp has this kit
https://www.fcpeuro.com/products/bmw...-23311228393kt
and found the bushings..

https://www.fcpeuro.com/products/bmw-shifter-detent-pin-bushing-repair-kit-genuine-bmw-23117542726

https://www.ecstuning.com/b-genuine-bmw-parts/shift-pin-bushing-kit-priced-each/23117542726/

[sapote]

The 2 pins (5/6 and R gears) are sliding inside the 2 bushings. There is a kit at FCP with a bush, blue cap and lock ring for less than $8. I will post the part #. Bearing and big spring from McMaster.