[Bruckner]

I noticed that Perfection clutch makes a DMF application for the 968 (number 50-2787), at about a third of the price of OE. Anyone gave it a try?


Anybody knows who builds the DMF for Porsche nowadays?

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[Roboman]

Hi Bruckner ..... vibration problems, need to change your clutch anyway, or are doing some preventative maintenance?

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[Bruckner]

Looking at a clutch replacement soon, I assume my 160,000 mile original DMF will be ready for a change. My local dealer tells me the outrageously expensive DMF takes 3 weeks to be delivered from Germany. I understand Luk no longer makes a suitable replacement, hence my curiosity about this Perfection clutch option. Surely I can't be the only one looking for an alternative to a 1800$ DMF?!

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[Roboman]

Fair enough, .... while your in the there ..... I looked up DMF online and found them from $1300 upwards. But seeing as I have no idea of judging quality v price I cannot be helpful. However I'd be surprised if someone on here hasn't previously done that work, so I wish you good luck.

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[Waylander]

You can get DMF rebuilt I believe

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[Bruckner]

Anybody knows whether Porsche specifies a replacement interval for the DMF, in terms of mileage?


Interestingly, Perfection clutch also offers a clutch kit for the 968, which happens to be more expensive than the Sachs kit. I sent an email request to the tech department to ask for specs, including the clamping force. I will report back with any reply if I get any.

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[94SilverCab]

Don't believe there is an interval.

 

My clutch was replaced 2 years ago, around 90k miles, Max told me the DMF was fine. I chalk it up to shooting lubricant into the observation port at every opportuntiy.

 

Regards,

 

Jay 

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[Bruckner]

Don't believe there is an interval.

 

My clutch was replaced 2 years ago, around 90k miles, Max told me the DMF was fine. I chalk it up to shooting lubricant into the observation port at every opportuntiy.

 

Regards,

 

Jay 

 

Mine has 160,000 miles and the previous (single) owner tells me the flywheel was never changed. Since the clutch will be changed soon I'm thinking now or never for the flywheel, going back in there in a few years won't be fun and I'd like the drivetrain to be as smooth as it can be.

 

Here's another question that's sort of related: does the rear torsion bar need to be removed to take out the torque tube?

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[Waylander]

Don’t need to remove the tube on a 968 to do the clutch flywheel or main seal

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[J.Elenbaas]

It does make the job a whole lot easier to reach the parts.

But no, it is not necessary.

 

I believe on the 968 taking away the torque-tube itself is a more complex operation as on the 924's and 944's

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[Waylander]

4 hours to do the clutch on a 968, if you remove the tube 10-15 hours and thats with no complications

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[Bruckner]

I wasn't clear about this, taking out the torque tube would be for the purpose of a rebuild, I know the clutch job is far easier than the 944 series. Having done it on jackstands on a 951, I fully appreciate the updated 968 design.


What's the likelihood that a 160K mile flywheel might have still have enough life in it to warrant keeping it? I know some shops will resurface, but the vibration dampening material is what typically fails.

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[Waylander]

Mine has done 160k and is still fine, I have no intention of replacing it, and I put a new clutch in 20k ago

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[Bruckner]

Disappointing development, I found this webpage with a review saying the DMF does not fit the Porsche 968 though it is the parts only application.

 

https://www.autozone.com/drivetrain/flyw...xt=DMF2787

 

So far all I get from Perfection clutch regarding the clamping force of the pressure plate: "it is per OEM specs". Not much use!

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[94SilverCab]

Disappointing development, I found this webpage with a review saying the DMF does not fit the Porsche 968 though it is the parts only application.

 

https://www.autozone.com/drivetrain/flyw...xt=DMF2787

 

So far all I get from Perfection clutch regarding the clamping force of the pressure plate: "it is per OEM specs". Not much use!

 

Give Pete at RS Barn a call, he'd be a good resource.

 

Hint: it would be nice if you filled out your profile, so if someone was local to you they might lend a hand.

 

Jay

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[MCL968]

Disappointing development, I found this webpage with a review saying the DMF does not fit the Porsche 968 though it is the parts only application.

 

https://www.autozone.com/drivetrain/flyw...xt=DMF2787

 

So far all I get from Perfection clutch regarding the clamping force of the pressure plate: "it is per OEM specs". Not much use!

If the part number is the same for a 993, it's the wrong plate.

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[Bruckner]

If the part number is the same for a 993, it's the wrong plate.

 

It is not, I compared every MY 911 from 1990 to 1996, the numbers provided for the 968 (whether it is the clutch kit including the pressure plate, or the DMF) are specific to the 968. Still, if I can't get a confirmation of the actual specs showing the correct clamping force, it's a no go.

 

At this stage I'm no longer hoping to find an alternative to RS Barn for peace of mind regarding the pressure plate, and I have pretty much established that there isn't a viable alternative to the OEM flywheel, the only hope would be that Luk or Sachs came up with a suitable DMF alternative to OEM, which they do offer for both 964 and 993 at a fraction of the price of the 968 OEM flywheel.

 

The tech department at Perfection clutch is being responsive, the flywheel issue reported above was brought to their attention and I'm told they are investigating. I will report back if anything changes.

 

These are the joys of maintaining a rare car, I guess!

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