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11-26-2014, 04:12 AM | #1 |
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Swap.
Hey guys I want to do a auto to manual swap , before everybody on the forum starts getting at me let me explain my plans.
I plan on doing a Active Autowerke Supercharger on my car which has 95xxx miles and I feel like the auto transmission won't be able to take that power so in the mean time i want to start to buy up all the parts to do a auto to manual swap that way in the case the tranny does go I will do a Swap. Bad idea or good idea? Now would any m54 manual transmission work or Do I Need to get something Z4 specific? |
11-26-2014, 07:14 AM | #2 |
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I know this is the boring answer. But isn't it easier to sell your car (and keep aftermarket parts) and buy a Z4 with a manual gearbox instead? The best is always a Z4 M, the drivetrains on these cars can take a proper beating (except the stock clutch).
Besides that, I think the auto would be able to handle the power unless you're going heavy on the boost. But if you're going heavy on the boost I don't think the gearbox will be your biggest concern it would be the pistons or the rods. |
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11-26-2014, 07:23 AM | #3 | |
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11-26-2014, 08:38 AM | #4 | |
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If you're gonna have the car for daily use with some spirited driving and not frequently race at red lights I see no reason why it should break, maybe the clutch will start to slip with time but that's inevitable. BMW usually have a lot of overdimension in their drivetrains. Especially on the "top of the line" engines, all the M-cars but also 328/330/335/530/540/740 etc. Edit: I know of a guy here in Sweden that have over 400HP and 800NM in his 335D E9~ with a standard automatic gearbox (no dubbelclutch) and his gearbox is holding up depsite it being spec'd to 600 NM. BMW usually uses top notch stuff for their drivetrains. Edit 2: Made some research, if you have a 2005 Z4 3.0iA US car it will have the a5s325z-gearbox. It will hold for 325NM according to the spec's, but it will handle a lot more than that. Depending on driving style ofc.And as with all FI cars that are NA from the begining it will wear out a lot of components faster. Last edited by Westersund; 11-26-2014 at 09:05 AM.. |
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11-26-2014, 12:31 PM | #5 |
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Hey man its a 2003 bmw z4 3.0 automatic transmission. I love driving my little Z4 hard so yeah i guess you could say spirited driving along with some highway pulls.
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11-26-2014, 12:56 PM | #6 |
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It has the gearbox I mentioned in my previous post, 325NM spec. Probably holds for a lot more. You won't know until you break it.
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11-26-2014, 01:10 PM | #7 |
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