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Swap MB 5-spd AT for 7-spd AT

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Old Jun 13, 2008 | 12:08 AM
  #1 (permalink)  
coolb944's Avatar
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From: Redondo Beach, CA
Default Swap MB 5-spd AT for 7-spd AT

So here's an interesting question. I've been reading about how great the 7-speed automatic from Mercedes-Benz is, especially the one put into the new C63 AMG. How possible would it be to hook the transmission up the MB 3.2 N/A? Think it would be a good match for the engine and the car?

Or, how about dropping the 3.5 DOHC V6 and 7-speed from the current SLK into the car. Did the floorpan change much? Would it work? What do you all think?

Just thought it would be an interesting question to throw out to my fellow Crossfire faithful

Brad
 
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Old Jun 13, 2008 | 04:31 AM
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Mr. F's Avatar
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Default Re: Swap MB 5-spd AT for 7-spd AT

aren't the 7 speeds longer than the 5's? could be an issue.
 
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Old Jun 13, 2008 | 06:55 AM
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ChuckNorris's Avatar
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Default Re: Swap MB 5-spd AT for 7-spd AT

I say dive in head first! I'm sure you could buy a totaled one from an insurance company .
 
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Old Jun 13, 2008 | 09:09 AM
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BlueStorm's Avatar
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From: San Pedro
Default Re: Swap MB 5-spd AT for 7-spd AT

the problem is, mbz keeps tight control over who can have access to the cars computer's, so getting your crossfire driveline computer to operate the electronic valvebody of a 7 speed car, is not gonna happen and futile attemp at a conversion.

unless it's been done already on a slk320 of a similar body controled car, the trans computer may not have the outputs to actuate the valvebody solenoids in the 7spd.

If you can find an aftermarket computer to run the solenoids it can work. maybe GM sells a trans computer for racing that supports a 7spd trans?
 

Last edited by BlueStorm; Jun 13, 2008 at 09:13 AM.
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Old Jun 13, 2008 | 10:59 AM
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sonoronos's Avatar
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From: Fairfax, VA
Default Re: Swap MB 5-spd AT for 7-spd AT

Originally Posted by coolb944
So here's an interesting question. I've been reading about how great the 7-speed automatic from Mercedes-Benz is, especially the one put into the new C63 AMG. How possible would it be to hook the transmission up the MB 3.2 N/A? Think it would be a good match for the engine and the car?

Or, how about dropping the 3.5 DOHC V6 and 7-speed from the current SLK into the car. Did the floorpan change much? Would it work? What do you all think?

Just thought it would be an interesting question to throw out to my fellow Crossfire faithful

Brad
How about just the heads from the 3.5 DOHC V6? Then you would have DOHC and VVT on the SOHC block!

Hybrid Frankenstein tuning powah!!!!

In the honda tuning world, they call this mod to a B18B an LS/VTEC.
 
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Old Jun 13, 2008 | 11:41 AM
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Voyager's Avatar
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From: Batavia, IL
Default Re: Swap MB 5-spd AT for 7-spd AT

haha an ls/vtec huh? interesting
 
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Old Jun 18, 2008 | 05:41 PM
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shoeman's Avatar
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Default Re: Swap MB 5-spd AT for 7-spd AT

haha he is right i had one in my civic and it was a 4cyl monster...... regaurdless im glad im outa that phase! i like the german auto motive line a ton more!!!!!
 
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