M3 EVO gearbox and diff - possible to fit to a 97 328i sport?
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  1. #1
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    M3 EVO gearbox and diff - possible to fit to a 97 328i sport?

    I've been casually looking for a sport diff (LSD) for my 328i turbo project for a while now.
    I've got in contact with a bloke locally who has a written off M3 EVO.
    He's suggested taking the gearbox, prop, diff and possibly even driveshafts from his breaker and transplanting the lot onto mine.

    I didn't really want to just swap the diff, as it would lower the gear ratios from my current 5 speed 'box.

    Has anyone done this, or does anyone know if it's a fairly straightforward job and would i need any other parts?

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    your box is about the same ratios as the 6 speed any way and sixth gear is only any use on the mway really
    but if you really want to fit it its a straight swap with all the bits you listed just make sure you get the slave as its different to the 2.8 one

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    Quote Originally Posted by Jackmcl View Post
    I've been casually looking for a sport diff (LSD) for my 328i turbo project for a while now.
    I've got in contact with a bloke locally who has a written off M3 EVO.
    He's suggested taking the gearbox, prop, diff and possibly even driveshafts from his breaker and transplanting the lot onto mine.

    I didn't really want to just swap the diff, as it would lower the gear ratios from my current 5 speed 'box.

    Has anyone done this, or does anyone know if it's a fairly straightforward job and would i need any other parts?
    To swap the diff you need to take the whole subframe out too. EVO has a large case diff which will not fit into the subframe on the 328, you will need the EVO subframe

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    M3 EVO gearbox and diff - possible to fit to a 97 328i sport?

    I'm searching for a sport LSD, can't find one anywhere so might be going the same path as you. No need to change the box, I think you just need output flange on the box for the m3 prop to bolt up to.

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    The gear ratios are the same as the EVO gearbox, apart from the addition of a 6th gear - the problem is, if i change just the diff, the the final drive ratio is reduced from 2.93:1 to 3.23:1
    So in 5th gear, the top speed will reduce to about 145mph.
    With a 6th gear - it'll be geared to about 175 - 180 at the red-line.
    Given that I'm aiming for 450 - 500 bhp from the turbocharged engine - 145+mph is a real possibility...

    If I keep the 328i box and obtain an LSD from an early sport model, then the top speed should be somewhere around 165mph which I'd be happy with...for now

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    Take the entire back axle, trailing arms hubs the lot
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    I got the back axle on mine works really well. I remember it being different at the time but kinda got used to it now. If your using the 5 speed box you'll need a 3.0 prop tho, these are usually bout 100-150. Yeah take the whole axle if your doing it! also remember the brakes and calipers. If you can go for the front hubs and brakes and you'll basically be running evo geo setup to!

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    M3 EVO gearbox and diff - possible to fit to a 97 328i sport?

    Thing is once you've bought your car and upgraded everything you can pick an an Evo up for 2600 these days,if your building a track drifter is it worth starting with a 325?
    Soz nothing to do with the post just thinking aloud.

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    New plan, New question:
    There's an LSD on eBay from an e30, which is a type 188 medium case diff - although it looks quite different, would it be difficult to fit this to the e36 328i sport?
    Am I right in thinking the 328i has the same medium case diff?

    It has a tall ratio - 2.65 - which really appeals to me too, as I'll be keeping the standard 5 speed gearbox.

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    M3 EVO gearbox and diff - possible to fit to a 97 328i sport?

    Quote Originally Posted by Jackmcl View Post
    New plan, New question:
    There's an LSD on eBay from an e30, which is a type 188 medium case diff - although it looks quite different, would it be difficult to fit this to the e36 328i sport?
    Am I right in thinking the 328i has the same medium case diff?

    It has a tall ratio - 2.65 - which really appeals to me too, as I'll be keeping the standard 5 speed gearbox.
    Not sure with that diff but from my experience of doing an internal diff swap large 210 e46 m3 into 210 e36 m3 large case the front bolt has a differant location.

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