Hi, i've read about so many different options i just wanted to check this would work ok.
I currently have an M40 318i cab
would a e34 M30 manual box and a M20B25 prop bolt up nicely. I have the gear selector mechanism from a M20B25 also
Thanks
gearbox / prop combo
Moderator: martauto
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dubownerbilco
- E30 Zone Newbie

- Posts: 192
- Joined: Fri Dec 17, 2010 11:00 pm
Simple answer, yes 
Exactly the setup i am using, you have to remove the centre bearing and turn it the opposite wah so that it still bolts to your body in the same place
Also you will need the small output flange from an m20 gearbox to swap onto the m30 box
Exactly the setup i am using, you have to remove the centre bearing and turn it the opposite wah so that it still bolts to your body in the same place
Also you will need the small output flange from an m20 gearbox to swap onto the m30 box
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leeparkes
- Married to the E30 Zone

- Posts: 9538
- Joined: Thu Jan 03, 2008 11:00 pm
- Location: Black country
Dont need to mess with the centre bearing it should just bolt straight up.
Flange has to be from a 325i for some reason 320i has different splines and wont fit.
Flange has to be from a 325i for some reason 320i has different splines and wont fit.
Cypriotgeeza wrote:I done both my mates in my old 318is
felt so proud,even tried it with a E30 325i and got put in my place..
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dubownerbilco
- E30 Zone Newbie

- Posts: 192
- Joined: Fri Dec 17, 2010 11:00 pm
Oh, i read that you needed to reverse the bearing :S, bugger, ahwell it can stay like that
i cba taking it back off!
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jimbom30cab
- Tech 1 freak
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- Joined: Mon Oct 12, 2009 11:00 pm
- Location: in the garage
Thanks Gents
Is part No.17 the output flage you are talking about in this M20B25 parts diagram ?
http://realoem.com/bmw/showparts.do?mod ... g=23&fg=15
So take it the job is as simple as removing the M30 output flange and fitting the M20 flange and tighten up the nut.
Many thanks
Jim
Is part No.17 the output flage you are talking about in this M20B25 parts diagram ?
http://realoem.com/bmw/showparts.do?mod ... g=23&fg=15
So take it the job is as simple as removing the M30 output flange and fitting the M20 flange and tighten up the nut.
Many thanks
Jim
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jimbom30cab
- Tech 1 freak
- Posts: 7634
- Joined: Mon Oct 12, 2009 11:00 pm
- Location: in the garage
nice one, cheers Lee mate, now the next challenge is to find one.......


