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E36/7 Z3 (1996-2002)
E36/7 Z3 Roadster, Z3 coupe, Z3 M Roadster and Z3 M Coupe talk with our gurus here.

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  #1  
Old 12-28-2009, 05:58 PM
dave78063 dave78063 is offline
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Location: Texas
 
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Mein Auto: Z3
Swap 5spd manual for 6 spd manual

I have a 98 2.8L Z3. I am considering swapping out the 5 spd for a 6 spd. Can this be done; how easily; how much?

I am guessing that the 6th gear would lower hwy RPM which would result in better gas mileage. I spend 80% of my time on the hwy and drive about 80 mi/day.

How is my thinking flawed?
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  #2  
Old 12-28-2009, 06:41 PM
fmcfad01 fmcfad01 is offline
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Mein Auto: S54 M Coupe
Can be done. Requires the e46m3 6 speed, a shortened drive shaft, and probably a few other odds and ends, but a lot of m coupe guys have done it. I haven't gotten there yet. Most go with more aggressive gearing in the rear at the same time...like a 3.46 or 3.73.
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  #3  
Old 12-29-2009, 06:33 PM
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Mpire Mpire is offline
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Mein Auto: S54 M Coupe x2, M52 Z3
If you get the Evo 6 speed then all you need is the cross member, a rogueengineering.com 6 speed shift kit, and a shortened drive shaft.
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  #4  
Old 12-29-2009, 06:47 PM
Vinci Vinci is offline
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The crossmembers are different too? I figured they were the same, but moved towards the rear, using the other set of threaded holes.
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  #5  
Old 12-29-2009, 07:04 PM
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Ron Stygar Ron Stygar is offline
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Quote:
Originally Posted by Vinci View Post
The crossmembers are different too?
Yep.

Last edited by Ron Stygar; 12-29-2009 at 07:06 PM.
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  #6  
Old 12-29-2009, 07:51 PM
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Yeah, different cross members because the tunnel is a bit wider 6 inches farther back I guess.
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