Granny shiftin', not double clutching like you should

 

BS. As many of us stated, this happened primarily on the 2 to 3 shift at high RPMs. I never made a hard launch or clutch dump. I don’t ride my clutch. As the number of complaints demonstrates, this clutch just wears out sooner than you would expect.

 

I put 24,000 hard miles on my 981 GT4 and never double clutched it. ZERO problems/issues with that transmission.

 

EDIT: deleted. meh.

 

Maybe there would not be a problem if Porsche incorporated a shorter final drive or a gear set with similar ratios to that utilized for the PDK transmissions. I doubt that the majority, if any, are using their Porsches for drag racing. In my case I used my 718 Spyder to autocross and experienced slippage at times when accellerating from a stop to the timing lights and on the shift from 1st to 2nd. I have been driving manual transmission cars, including multiple Porsches, for more than 50 years and this is the first time I have encountered clutch slippage of this magnitude at such low miles. How are you using your Porsche?

 

Took out a manual GT4 at PECLA within the last 2 years. Had gear 2 to 3 upshift issue at high RPM. Other upshifts were fine. It was intermittent but repeatable. Felt like clutch was not engaging despite shifter clearly gated in 3rd and clutch pedal fully disengaged, with RPM continuing to rise to the limiter. A few months later, took out a different manual GT4 at PECLA, had one incident where upshift 2 to 3 felt a brief stutter after landing into 3rd, but could not repeat. Maybe it was my imagination. That car did great.

Nowadays, you cannot find a manual GT4 at PECLA unless you reserve a special course which requires you drive certain other models as well. No more manual GT3. Likewise, any "Master the manual" course is no longer available, which is a shame.

 

Yep. As I mentioned before, I never did a hard launch in my GT4. Been driving a manual for 40 years. This slip is different than what I experienced in big muscle cars from the 70s. In the GT4, the sensation was the RPMs hang during the shift and the clutch wouldn’t renegade. It wasn’t a rpm runaway situation, but the Porsche service dept confirmed it was a slip.

But whatever, some people here seem to be experts on how others (that they don’t know) are driving their car.

 

I saw this issue on one 981 GT4....luckily for me it was not mine and was able to enjoy my 981 GT4 for 5 years and 27K miles with lots of track time, no slippage.
But the other GT4 was a friend and they change it under warranty. I'm pretty sure he is a very proficient with manual cars.
Looks like with the new engine the problem could be more apparent but it's not happening in all 718 GT4s.
Maybe out of spec pressure plates/discs on some cars coupled with the extra power of the 9A2 engine?????

 

You missed the joke...

 

Are there any cases of clutch slippage with GTS 4.0? The clutch parts should be the same.

 

Hello Everyone,
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I've been following this thread, and at this point I've had multiple 718 4.0L owners/friends of ours complain of premature clutch wear/slippage both on and off the track on modified and unmodified vehicles, most notable on wide open throttle shifting from 2nd to 3rd. Given there was not much of a solution to this other than having replacement with factory components to expect a repeat occurrence (981 GT4 aftermarket is not compatible), we did a bit of a deep dive on this and connected with a very well-reputed and experienced Porsche drivetrain development company out of the UK named Ninemeister. They have developed a lightweight flywheel/clutch replacement specific to the 718 4.0L which resolves this clutch slippage, and we are now importing these packages into North America.

Below are some more details, feel free to give me a ring/call anytime to chat a bit more in depth about it and/or to order a kit. If you place an order on our website, be sure to reference my name and Rennlist during checkout and I'll follow up with ETA personally.
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Ninemeister Flywheel/Clutch Package
https://soulpp.com/product/porsche-7...d-clutch-kits/
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Best Regards,
John Gaydos
...
Within the science of making a car go faster while there is little new to be learned, there are often items which are overlooked. While increasing engine power is the obvious choice of the masses, reducing power lost in the drive train is always an effective way to get something for free which does not compromise the integrity or reliability of the engine. Step forward the lightweight flywheel.
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A dictionary definition of a flywheel is a “mechanical energy storage device” – the heavier the flywheel the more energy the flywheel will store. But more importantly, the lighter the flywheel the less energy (read power) it requires to accelerate it to speed, so for any given engine power, with a lighter flywheel more of that power will end up at the tires to accelerate the car harder in any gear.
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Lightweight Flywheel Benefits:
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CNC machined from carbon steel billet
45% reduction in inertia compared to stock dual mass flywheel (13.6 lbs / 6.2kg LWF vs 24.9 lbs / 11.3kg DMF)
Direct replacement
Increases wheel power
Improves acceleration
Improves throttle response
Faster downshifts / rev matching due to faster rpm matching
Spigot bearing and new flywheel bolts are included.
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Performance Clutch Benefits:
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Higher thermal capacity compared to OEM friction material
Higher transmittable torque compared to OEM
SACHS Performance pressure plate giving higher transmittable torque and higher clamp load
Capable of over 550Nm torque
Sprung uprated organic center plate with OEM pedal feel
Ideal upgrade for typically fast road/track day cars and everyday use
..
NOTES: Slight transmission noise will be present at low rpms due to vibrations from the engine being transmitted to the un-driven gears on the shafts. The reduction in mass equates to less stored energy, so the car will also require more delicate clutch control at low rpm – an acceptable tradeoff for a much more responsive engine.
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ABOUT NINEMEISTER: Ninemeister is one of the leading independent Porsche specialists in the UK. With a history of the marque from early air-cooled cars to the latest GT models, they specialize in everything from full track cars to routine servicing, engine rebuilds, engine and chassis upgrades.
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SHIPPING: We try to keep these kits in stock, though please contact us for expedited orders to ensure proper delivery time.

 

I forgot about this thread and launched my car several times yesterday. Hopefully, I won't encounter this issue but am eager to hear reviews on the aftermarket flywheel and clutch that John from Soul posted.

 

John is there an option to get the upgraded clutch - but with the OE dual-mass flywheel?

 

Saw it happen to a buddy at AX last weekend. He’s about as far as you can get from someone abusing a car. Happened under acceleration. Now he’s somewhat regretting he didn’t get PDK.

 

What milage?

What gear/rpm did start occurring?