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Old 02-06-2006, 04:34 PM   #1
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Question about the CMstg4...

Tom,

I had you put a CM stage 4 in my car along with 4.06 gears, a Quaife and flywheel back in May of last year, and I'm wondering what the average service life is on these. Recently my clutch has been slipping, and I think it might have something to do with my clutch MC leaking. Finalley said that he had the same clutch in his non-turbo SVT and it failed at about the same mileage interval (I've put about 22,000 on the car since then.) I'm just curious if (in your experience with them) these clutches tend to die regularly at ~25,000 miles regardless of engine output.

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Old 02-06-2006, 06:45 PM   #2
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No i havent had or seen that to be the case , I have many customers with much more than 22-25,000 miles sence the CM4 install

If you are leaking fluid into the belhousing that will for sure cause it or any clutch to slip

It is still under warranty so let me know how i can help

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Old 02-06-2006, 10:16 PM   #3
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Quote:
Originally posted by 1turbofocus
If you are leaking fluid into the belhousing that will for sure cause it or any clutch to slip
Right on, I agree.

My (previously) leaking Master cylinder caused my (brand new) OEM clutch to start slipping at 4,000 miles, and it continued to do so until I changed it at about 8,000. It got so bad it was too the point that I could not use cruise control at all. Get that tranny down ASAP!

Heres what your bellhousing probably looks like:

Clutch problems inside
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Old 02-06-2006, 11:42 PM   #4
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^
AFAIK the slave cylinder is fine...I haven't noticed any brake fluid leaking out of the flywheel vent hole at the bottom of the bellhousing. When I first start the car it'll slip in any gear if I flog on the throttle, but after I've been driving for about 10 minutes or so the clutch holds fine and will continue to do so until I turn it off and let it sit until it cools down. The other thing is the engagement point is almost at the end of the pedal travel...I can change gears with the pedal only pushed half-way in. I'm suspecting the leaking master cylinder (the cylinder inside the cabin that the clutch pedal interfaces with) allowed some air into the system and that's causing the engagement problem...I have brake fluid dripping down onto the floor mat at a very slow rate (I have a new MC on order at the dealer up the street.)

The only other variable is I recently had to have the transmission itself repaired at a dealership...long story but I was about 200 miles from home for work and the linkage decided to let go inside the box, so they had to pull the gearbox off and replace the broken component. My only other guess is they either damaged the slave cylinder while it was off or slopped oil/grease (etc.) onto the clutch while the transmission was off.

Tom, I'm assuming you mean a manufacturer warranty on the clutch? What are the terms (time/mileage?) I'm kind of surprised a wear item like a clutch would come with a warranty that would last longer than 22,000 miles...

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Old 02-07-2006, 12:20 AM   #5
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Hhahahahahaaha. I'm a ******g idiot. I meant slave, sorry. Thats what I get for multi-tasking.
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Old 02-07-2006, 06:57 AM   #6
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If you got it in May of 05 from me , I will get it under the warranty

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Old 02-08-2006, 01:16 PM   #7
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My CM3 (No FI) is slipping in my SVTF...when it gets warm (engine at normal temps) its fine. Any ideas?? When my engine is cold, it takes a lot to get my car to move...sucks.
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Old 02-22-2006, 06:33 PM   #8
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Tom, when you say you'll get it under warranty is that if I bring my car down to you, or will you cover it if I go to a shop locally and they find out that its shot? I just replaced my master cylinder and it didn't help, so I'm thinking now the dealer that took my transmission off might've not aligned the clutch when they put the box back on. I'm going to take it to a transmission shop next week and have them take a look.
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Old 02-22-2006, 10:21 PM   #9
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It will be covered either way

Tom
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Old 02-23-2006, 12:54 AM   #10
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Outstanding...I'll assume that you'll need the old clutch shipped back if it turns out to be dead?

Also, I have a friend who's a certified diesel mechanic and is willing to give me a hand with this for next to nothing/nothing...if I sent you payment for a new CMstg4 would you be willing to ship me one and then refund the payment (minus paypal charges), either if the one in my car truly is worn out or if not I return the new one for refund? My friend lives in Indiana and is going to be in town for a few days, and I'd like to have a replacement on hand when he's here in case I need it.

Thanks!
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