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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N57 / M57 Turbo Diesel Discussions - 335d > 335d Gearbox Swap



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      10-04-2007, 06:59 AM   #1
DCMETRO22Z
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335d Gearbox Swap

since the 335D tranny is designed to sustain far more torque than the 335i one ,do you think its possible to swap the trannies if the 335i engine is heavily modified( procede + ic +intake + downpipes +exhaust) .Naturally i speak about steptronic.
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      10-04-2007, 07:38 AM   #2
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i thought about that too. but wouldn't the gear ratios be all different since the diesels dont rev as high?
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      10-04-2007, 09:21 AM   #3
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Quote:
Originally Posted by baggerben View Post
i thought about that too. but wouldn't the gear ratios be all different since the diesels dont rev as high?
yes,i hadent thought about that but you should be right
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      10-04-2007, 10:20 AM   #4
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I read somewhere that the bolt patterns to attach a tranny to the diesel engine and gasoline engine were different... not to mention all the electronic controls. It would not be a simple swap, and would require quite a bit of custom work to be performed.
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      10-04-2007, 05:14 PM   #5
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Swapping the complete gearbox is almost impossible. What is possible though is to use some of the internals from the 335d (ZF 6HP28) tranny to update some parts in the 335i tranny (ZF 6HP21). No further details yet, but U can try to ask Eugen. Check out this thread.
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      09-09-2011, 09:55 PM   #6
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Manual conversion

I know it isn't rated for the torque but what issues would I face in installing a manual in a 335d? Would it bolt in? What electrical issues?
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      09-10-2011, 12:24 PM   #7
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Quote:
Originally Posted by Dhake2 View Post
I know it isn't rated for the torque but what issues would I face in installing a manual in a 335d? Would it bolt in? What electrical issues?
Gear ratios would be off. Now I know a 335d was raced at daytona a couple of years ago but o don't know what granny was used. Email BMWCCA as the article appeared in Rounded.
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