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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 08-23-2012, 10:59 AM   #1
6ender@
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transmission of m3 into 330i

am i able to put in the transmission of an e46 m3 into my e46 330i
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Old 08-23-2012, 12:50 PM   #2
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it will fit right up to your transmission, but IIRC the driveshaft wont fit perfectly.
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Old 09-03-2012, 11:11 PM   #3
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Iirc?
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Old 09-03-2012, 11:22 PM   #4
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If it really counts
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Old 09-03-2012, 11:25 PM   #5
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If it really counts
Pretty sure it's, "if I recall correctly"
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Old 09-04-2012, 12:05 PM   #6
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It will bolt up. You'll need a different shift setup, clutch, flywheel, and either a custom driveshaft or you'll have to swap to a M3 rear end (subframe and all).
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Old 09-04-2012, 05:12 PM   #7
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What would be the benefit of doing this?
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Old 09-04-2012, 07:47 PM   #8
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Good transmission with ratios that suit aggressive gearing. Lots of clutch options.
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Old 09-04-2012, 09:03 PM   #9
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I'm in the midst of doing this as well.

I'm fairly certain a 6sp 330 driveshaft will work, though they're tough to find.
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Old 09-04-2012, 09:06 PM   #10
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I'm in the midst of doing this as well.

I'm fairly certain a 6sp 330 driveshaft will work, though they're tough to find.
5 years and counting.
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Old 09-04-2012, 09:12 PM   #11
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To me, the cost of doing this + supporting mods to a regular 3 series, puts you dangerously close to the point where it makes more sense to: "just buy an m3 in the first place". I'd love a six speed but the costs are so prohibitive unless you have special access to very cheap donor parts
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Old 09-04-2012, 10:29 PM   #12
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If you can DIY, cost is not really in the M3 realm.

Tranny and driveshaft, the primary expenses, can be had in the $2k ballpark.

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Old 09-04-2012, 11:44 PM   #13
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2 grand plus 2 grand or a little more for supporting mods... That puts you easily around 14000 when you include the price of the car, a few thousand more and you have an m3. It effectively doubles most people's modding expenses. When you consider the fact that you may need larger wheels for your new brakes if you do the whole rear end swap, and larger front brakes so you can hope to maintain some sort of reasonable bias... Costs quickly escalate higher. It's definitely not a cheap mod. If a 6 speed non-m is what you really want, I get it, because I love my car and I get building something slowly rather than dropping a big chunk of change all at once. I'm just saying, a tranny swap to an m tranny is not to be taken lightly and one should look at all associated costs that could be incurred.
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Old 09-05-2012, 12:50 AM   #14
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2 grand plus 2 grand or a little more for supporting mods... That puts you easily around 14000 when you include the price of the car, a few thousand more and you have an m3. It effectively doubles most people's modding expenses. When you consider the fact that you may need larger wheels for your new brakes if you do the whole rear end swap, and larger front brakes so you can hope to maintain some sort of reasonable bias... Costs quickly escalate higher. It's definitely not a cheap mod. If a 6 speed non-m is what you really want, I get it, because I love my car and I get building something slowly rather than dropping a big chunk of change all at once. I'm just saying, a tranny swap to an m tranny is not to be taken lightly and one should look at all associated costs that could be incurred.
You're not comparing apples to apples. We're talking about a straight tranny swap, nothing more.

You used the key words yourself - "may need" and "if you do the whole rear end swap" Those are simply options and not necessary for a tranny swap. It's not an S54 motor, it's just a transmission.

I'm going off real costs that I've already paid out. With the exception of a few misc. bolts, I have all necessary parts to swap an M3 tranny into my 330 and will be within a few nickels of $2k, give or take.
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Old 09-05-2012, 09:19 AM   #15
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You're not comparing apples to apples. We're talking about a straight tranny swap, nothing more.

You used the key words yourself - "may need" and "if you do the whole rear end swap" Those are simply options and not necessary for a tranny swap. It's not an S54 motor, it's just a transmission.

I'm going off real costs that I've already paid out. With the exception of a few misc. bolts, I have all necessary parts to swap an M3 tranny into my 330 and will be within a few nickels of $2k, give or take.
Fair enough, thats less than I would have imagined completing it for after all extraneous costs are accounted for. It is still a very pricey 6th gear. But like I said, I do get it. I've spent lots on my car now where others would have said, buy an m3.
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Old 09-05-2012, 02:50 PM   #16
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More clutch options and stronger internals on the 5spd. I see zero benefit from doing this unless you wanna run 4:10s... 5spd is also lighter! 100% waste of money

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Old 09-05-2012, 07:12 PM   #17
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More clutch options and stronger internals on the 5spd. I see zero benefit from doing this unless you wanna run 4:10s... 5spd is also lighter! 100% waste of money
Why wouldn't you wanna run 4:10's? Honestly, I wouldn't even run 3:46 without a 6 speed unless it was a track/toy weekend only car. It sure does seem like a fairly extreme cost to get that extra gear.
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Old 09-05-2012, 07:18 PM   #18
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Why wouldn't you wanna run 4:10's? Honestly, I wouldn't even run 3:46 without a 6 speed unless it was a track/toy weekend only car. It sure does seem like a fairly extreme cost to get that extra gear.
Logic, apply that first.
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Old 09-05-2012, 07:25 PM   #19
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More clutch options and stronger internals on the 5spd. I see zero benefit from doing this unless you wanna run 4:10s... 5spd is also lighter! 100% waste of money
According to?
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Old 09-05-2012, 07:55 PM   #20
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According to?
I'm open to you linking me more flywheel/clutch setups for an s54 vs m54. The 6 speeds are a modified version of a 5spd, that the manufacturer has already made. In order to add another gear in the same box they have to thin the gears. This isn't logical, no matter how hard you spin it. Nothing I say is worth reading, thank you for your time. I forgot to add, now that you have a weaker, heavier, less supported transmission. How is the MPG on the hwy.. /fail Edit: To answer the OP's question, yes it can be done. Read above, to see why I wouldn't.

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