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Old 11-25-2011, 07:40 PM   #1
Gtfour
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FS: E46 M3 6 speed transmission / OEM Clutch & Flywheel

I'm selling my E46 M3 6 speed transmission with OEM clutch & flywheel.

The transmission got 92000km on it and the clutch/pressure plate/flywheel 37000km.

Everything work well.

Reason I'm selling this unit is to do a 5 speed conversion


Price: 1500$
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Old 11-26-2011, 08:25 PM   #2
JINT
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huh? 6spd to 5spd? Am I missing something?
This is a deal and a half though.
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Old 11-26-2011, 08:29 PM   #3
craz azn
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Quote:
Originally Posted by JINT View Post
huh? 6spd to 5spd? Am I missing something?
This is a deal and a half though.
Weight purposes. He is building a track car.
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Old 11-26-2011, 09:58 PM   #4
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How much weight are we talking here ? I would think that would be more than made up with a high ratio diff and the 6sp ?
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Old 11-27-2011, 01:36 AM   #5
Gtfour
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I already have a 4.10 diff.

Yes I'm doing the conversion to save up some weight, a normal swap save around 20lbs. However, I also need a different driveshaft to do this swap and I'm looking at a custom carbon fiber one piece DS, another 6lbs and better vibration dampening. And finally, I will get a Bimmerworld race aluminum flywheel and 5'' clutch, complete unit weight 11lbs.

In the end, I,m looking at 35lbs and a lot less rotational mass so it should rev up faster.

Even if the 5 speed are less reliable than the 6 speed unit, they cost a fraction of the price and I'm not looking to add much power to my track car, I'm just looking to shave the maximum weight possible.

Here is my track car:
http://img.photobucket.com/albums/v6...rokracy112.jpg

And here is my new race car project:
http://img.photobucket.com/albums/v6...r/P1010195.jpg

I would like something around 2600lbs
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Old 11-27-2011, 02:30 AM   #6
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5 spd is also more reliable in track apps than the 6 spd from anything Ive seen...
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Old 11-27-2011, 07:54 AM   #7
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I would think with the 4:10 diff you are gonna run out of rpm with the 5sp but I guess it depends on the track.

I've actually heard the 5sp is much more reliable as well.

The driveshaft is dubious, yes it's lighter but the mass is on a very small radius. Rotational mass is a function of mass and radius.

BTW rotational mass can add another effective 1000lbs to a car, wheels being one of the worst culprits.

Nice projects.

Are you selling your 6speed with the driveshaft ?

BTW, I have some 5sp manual transmissions for sale.

Dave
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Old 11-27-2011, 09:59 AM   #8
JINT
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wow, sick M3
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Old 11-27-2011, 11:20 AM   #9
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what are those rims on the m3? that thing looks like a beast
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Old 11-27-2011, 11:57 AM   #10
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Sent you a PM two days ago. Please check it and respond. Thanks.
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Old 11-27-2011, 02:27 PM   #11
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Wheels are TR Mt1 18x9.5 et35 and 18x10 et25. They are not the lightest wheels but 20lbs isn,t bad. My RAC Monolites RS 110 were 17lbs and super strong.

I spend most of my time at Le Circuit Mont Tremblant, where I hit 225km/h in the backstraight so I think I won't ran out of gear.

With my actual setup, I barely use the 5 gear at LCMT so the 6 gear is useless.

Rotational mass as mention isn't just the driveshaft weight loss but also the flywheel/clutch/pressure plate assy.
http://store.bimmerworld.com/jb-raci...embly-p67.aspx

The E46 M3 driveshaft will be sell separetely.

dbworld4k I will send you a pm right now
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Old 11-27-2011, 02:35 PM   #12
dcramer
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regarding the rotational mass I assumed you would put the light flywheel clutch in anyway. My point is that for 6 lbs of driveshaft it's a questionable decision as the driveshaft is only 4" in diameter. Carbon is wonderful stuff but it won't outlast steel.

Check out this software http://performancetrends.com/Inertia_Calculator.htm for exact information. I am just guessing.

Dave
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Old 11-27-2011, 02:47 PM   #13
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With a 5spd and 4.10 gears, you could hit a theoretical VMax of ~145mph at 8000RPM with the S54.
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Old 11-28-2011, 09:55 PM   #14
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if i had the money id snatch this up in a second
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Old 12-09-2011, 09:26 PM   #15
Gtfour
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Still available

Found 2x 5-speed tranny for 300$

One from a MZ3 and the other one from a E36 M3.

Don't need the 6-speed anymore.
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