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Thread: Z4 tranny fit in e36 M3 ??

  1. #1
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    Z4 tranny fit in e36 M3 ??

    I was told you could take a 6speed from the Z4 and use it on the e36 M3 which no modifications. Is this true ?
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    i've heard this too... would love to know the truth.

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    Since the S50B32 Euro's tranny requires a different driveshaft, I'm pretty sure the Z4's would too, because they are different lengths than the 5 speed. Thing to do would be to measure from the flange to the end of the tranny case to see if they are the same.

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    Ask your father for a copy of the e-mail that I sent him today. I put all the basics in there for him to go over and get an idea about it. I believe the 330i PP and Z4 trans are identical in all aspects aside from driveshaft length.

    Tell your father I said good luck!

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    -Ron

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  5. #5
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    What's the advantage of going with a Z4 tranny over the usual Euro 6-speed conversion?
    Lee

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    Z4 and 330i PP transmission is brand new with factory warranty (I'm sure you'll never need it - if they'll even honor it in the wrong car). It's also cheaper.

    Euro M3 6spd - pot luck tranmission, you have no idea about it's true history since it is a salvaged part (not many guys in europe swapping from a 6spd to a 5spd). could be damaged and repairable ($$$) or could be damaged and become a $2,000+ lawn ornament.

    I also believe the new 6spd is lighter then the old euro M3 6spd but I'm not 100% sure on this.

    The gearing is almost identical as well, very interesting considering how they can both technically fit the same cars.

    -Ron

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  7. #7
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    Whoa now you've got my attention ... how much cheaper is a Z4 tranny? I've seen new Euro 6-speeds for around $5k I think.
    Lee

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    Ok so now everyone is wondering this, how or where would I get the correct driveshaft for the Z4 tranny ?? Any luck the driveshaft from the 330i would work ?? If its only $1700 for a new Z4 tranny we'll probably go that route.

    We'll take pics.

    Again this is for my fathers S/C M3 with 3:73 gears. The auto blew out so we're exploring options. With 3:73 gears it might be to fun with the 6speed even with the 18' rims. We're trying to keep the gears somehow to save money.
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    Since we're talking about this. Would the Z4 6speed work in my 318is ?? I have currently a 5speed with over 200k miles on it. What parts would need to be made or bought ?? And what would be any different: better revs ? better RPM for autox ?

    thanks,
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    Eclou...i called pacific bmw...yea Louie...he gave me a quote of $4400. I was surprised when i got the quote.

    and also..was told by a master mechanic, that the bell housing on the Z4 is the same as the 5sp ZF tranny. so it will fit the 3.2L and the 3L block.

    yes the tranny is slightly longer...and the drive shaft have to be shortened a little bit.

    will know more by friday regarding this top...speaking to a guy that has experience in this matter.
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    I think this is really important for E36 modifiers. This will give realistic access to some nice differential ratios, drastically increasing acceleration while keeping highway revs under control.

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    man, all of you guys who are interested in doing this should each donate $100 to someone willing to be the guinea pig. if it works, he'll refund you the cash .

    heck, i'd volunteer, but i already imported my 6-speed from the UK. (and yes, the transmission works great!!)

    shortening the drive shart is a very routine operation and there are shops that specialize in this. my guess is you are going to only run into problems if the clutch assembly doesn't fit or the engagement point is wrong or the input shaft is longer/shorter (think MJokester made this point earlier).

    Someone bite the bullet and buy one of these trannies and try it!! Better yet, someone, somwhere has certainly totalled their Z4 by now. I'm sure there are junkyards with these transmissions right now, that would sell you a relatively new transmission for even cheaper.

    - John

    - John

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    Someone post the Z4 6-speed part number, I'll make some calls.

    "It's not the people who vote that count, it's the people who count the votes."
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    Okay I'm confused, is a Z4 transmission $4400 or $1750?
    Lee

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    Interesting...I'm definitely interested! : Not brave enough to be the guinea pig for this mod, but I'll definitely consider being a lemming if it works!

    Don't think the driveshaft would be an issue since worst-comes-to-worst, I'm sure one can be custom made to fit. My friends are all into 4x4's and several of them have custom length shafts made to fit their mods.
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    Z4 6-speed
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  18. #18
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    We'd be interested in trying this mod if we can find one for $1750. We know a shop todo the driveshaft. Only need the tranny an all the other manual tranny parts.

    My father is talking about doing this and making a write up on it with pics an price's. Would anyone be interested in a write up on this ? Would anyone be interested in tossin in some cash for the experimental work.
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  19. #19
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    This sounds something I might try. My M3's tranny is whinning like a pig in heat right now. It locks you out of gear , whines , locks you in gear ..... lol 60k miles of ass kicking !

    So you all are telling me 1750 and the 6spd is all mine??? Its prob going to need a new slave and arm..... Prob can shorten my driveshaft

    But what about the trans brace???

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    Originally posted by Bill
    So you all are telling me 1750 and the 6spd is all mine??? Its prob going to need a new slave and arm..... Prob can shorten my driveshaft

    But what about the trans brace???
    Well, $1750 I think is the "know who to ask" price... Where are you located? If you can get reasonable shipping from Pacific BMW or similar I think it is in that ball park, maybe a little more.

    Great opportunity to put in a UUC stage-2 flywheel (or are they the wrong diameter...)

    There are several holes on the bottom of my e36 chassis (2 if not 3 sets... can't remember). One is for a manual 5-speed, one is for the Getrag 6-speed (mine bolted right up). Perhaps a 3rd for the auto, or maybe it uses one of the existing two?

    Either order the z4 tranny brace, and hope the lineup matches, or see if your brace from your old transmission has a way to attach to the new one (and hope that it lines up too). Some fabrication may be needed, but this shouldn't be too hard.

    Knowing BMW, I think there is a good chance it may just work.

    - John

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    Originally posted by sfmng
    Interesting...I'm definitely interested! : Not brave enough to be the guinea pig for this mod, but I'll definitely consider being a lemming if it works!
    Um, yeah, that was precisely my point. We need more guinea pigs and fewer lemmings!

    As I said before, I'd volunteer, as my car is no longer a daily driver, but I've got already got a 6-speed and, well, also a Euro engine, though I don't think that should make a difference.

    Come on... someone out there's got to be
    a) getting near due for a new clutch
    b) could get by without their car for a few weeks
    c) been thinking about a lightweight flywheel

    Oh well, I guess if you guys all want 6-speeds badly enough, someone will show the initiative...

    - John

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    Originally posted by John H
    Um, yeah, that was precisely my point. We need more guinea pigs and fewer lemmings!

    As I said before, I'd volunteer, as my car is no longer a daily driver, but I've got already got a 6-speed and, well, also a Euro engine, though I don't think that should make a difference.

    Come on... someone out there's got to be
    a) getting near due for a new clutch
    b) could get by without their car for a few weeks
    c) been thinking about a lightweight flywheel

    Oh well, I guess if you guys all want 6-speeds badly enough, someone will show the initiative...

    - John
    Hmm...I might be your pig. By the way, you have a euro engine on the way? Would you sell your M3 engine? I'd come pick it up. Anywhoo, I qualify for:

    a) clutch is near 90,000 miles and it's slipping like a bitch.
    b) I just bought an '87 Alfa Romeo Milano...my new beater...
    c) sure, but it's expensive...

    And here I am,
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  23. #23
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    If enough people would want me to try this out and be the guinea pig I am willing to do it. I have a full shop pretty much at my house , the time to do it , and I need a trans.

    Everyone that donates some funding , I will in return will do a very detailed PDF write-up with pics , part numbers, shops/vendors used.

  24. #24
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    Does anyone know the gear ratio's in the Z4's 6sp?

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    Originally posted by Bill
    Does anyone know the gear ratio's in the Z4's 6sp?
    this was just in a thread a few days ago... they are very similar to the euro 6-speed. 5th is 1:1 and 6th is .83 IIRC. 1st is somewhere between 4.23 and 4.30... I can't remember that one.

    Hold on... I'll dig it up for you.

    Where are you located?

    - John

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