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Old 09-03-2006, 06:10 PM   #1
ECUtuneOne
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Default sti 6 spd clutch &flywheel in 5spd wrx trans

Has anyone used the flywheel and clutch assembly from a sti 6 spd on a car with a 5 spd? I'm trying to find out if it is possible to use it with an 06 wrx transmission.
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Old 09-03-2006, 08:14 PM   #2
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Reading the Clutch & Flywheel FAQ that is stickied at the top of this forum will net your answer. Read the stickys and stop clogging our forum.
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Old 09-03-2006, 08:40 PM   #3
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Actually I couldn't find the answer in the sticky thread. I did look. I think I've found it after searching many a thread though. I asked directly because there is so much dissagreement and argueing in the regular threads it takes a lot of reading to come up with a conclusion I can be confident in. Sorry, the truth is I'm not an impreza owner so I don't keep current on the goings on here and I need fast information for purchase decisions to be made before store hours on tuesday.

At this point I've come to the conclusion that the 2006 wrx uses a push type clutch so the whole idea of an sti flywheel and clutch is thrown out there.

I also found an Australian subie pdf document saying that the 06 wrx pressure plate has 830Kg clamping force. Now I'm curious what the clamping force on the older wrx pressure plates is. I'll continue searching on my own and I'm sure that spec won't be too hard to find but if anyone who knows wants to throw me a bone and save me some time I would appreciate it.
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Old 09-04-2006, 04:27 PM   #4
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Actually, I haven't been able to find the the clamping force of the stock wrx's pull type pressure plates. Does anyone know and care to help out?
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Old 09-04-2006, 05:13 PM   #5
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My apologies, I thought I linked it in my FAQ.

http://forums.nasioc.com/forums/showthread.php?t=496150

The clamping force won't help you one iota though as clamping force means nothing in terms of how much TQ the clutch will hold. The stock WRX clutch will hold around 300 TQ and the stock STi clutch will hold around 400 TQ, these are rough figures though.
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Old 09-05-2006, 01:42 AM   #6
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Thanks much,

I would probably do the grinding and go with an sti clutch and flywheel if I was using an 05 trans. I'm looking at the 06 now. I have a buttload of torque and don't like cruising at high rpms on the highway so I prefer the 3.70 gears.

Is it possilbe to convert a push type trans to a pull type? That may seem like a stupid question so before I get flamed..I'm not stupid; I've just never actually had a transmission with a hydrauilic clutch mechanism in my pressence. I'm going to guess the pivot location for the clutch fork is in different locations for a pull vs push but I don't know.

I'm curious about the clamping force of the older wrx clutches since it seems like the clamping force was increased significatly with the change over to the push type clutch. OEM clutches are just so nice if they can hold the torque you are producing. I'm trying to find out if or maybe trying to convince myself the 06 wrx clutch will work for me.
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Old 09-05-2006, 04:59 AM   #7
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I believe you can, but I'm not a pro on this. If I recall rightly, you have to swap out the pedal box or something like that do swap clutch types. If no one replies, www.gearboxtech.com will know.
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Old 09-05-2006, 02:10 PM   #8
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ya, it sounds like a no on the switching to a pull type on an 06 trans.

It seems agreed that the clamping force of the 06 pressure plate is a good deal more than on the 05 but I still haven't been able to find a # for the stock 05 pressure plate yet. I'm going to call clutch manufacturers and see if I can get a consensus...they should know if the % increases they are giving is correct anyway.

If anyone else knows please do share
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Old 09-06-2006, 05:18 PM   #9
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Quote:
Originally Posted by ECUtuneOne View Post
ya, it sounds like a no on the switching to a pull type on an 06 trans.

It seems agreed that the clamping force of the 06 pressure plate is a good deal more than on the 05 but I still haven't been able to find a # for the stock 05 pressure plate yet. I'm going to call clutch manufacturers and see if I can get a consensus...they should know if the % increases they are giving is correct anyway.

If anyone else knows please do share
What I do know is that my clutch seems to be able to hold 400 ft/lbs with ease so far. (06 wrx)
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Old 09-06-2006, 07:34 PM   #10
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not sure...but ive heard from many that the 5pd clutch/flywheel will fit the 6sp with a little grinding..sorry it that was mentioned above, i only skimmed through it.
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