GTgears

Only 3 vehicles are offered with the pdk-s gearbox, which is the only way to get PTV+, the turbo-S, 991 Carrera-S, and 991 GT3s of all variants.

2slow2speed

I pointed out my own mistake on my post, the 991GTS description states that the PTV+ includes an e-diff. Not sure if the implementation is as robust and track worthy as the one on the 991GT3.

Since we have gotten side tracked, let's get back on topic.

If the GT4RS with some form of PDK comes to fruition:

Will PAG make a GT4RS with PDK/PDK-S and an e-diff?

Or will they make a GT4RS with PDK/PDK-S and a regular mechanical diff?

2slow2speed

Thanks for chiming in Matt

BGB Motorsports

I guess this is as good a time to ask as any; who here actually wanted a PDK in the GT4, raise your hand?

The issue is that the 991 PDK doesn't work in the 981 so therefore a decision has to be made to invest in maybe a PDK specific for the 981 3.4L. I would be shocked if the car had the electronic diff which probably needs to be smarter for the rear wheel steering available on the GT3 that should never ever ever be installed on a mid engine Cayman.

ChrisF

Given the demand and the target audience for the GT4, I highly doubt track time would affect a short term sales price. Maybe in 3 years when comparing a garage queen to a track *****; then It will matter.

jphughan

Well gee, thanks for shattering my illusion that going with a manual on the GT4 really was all about Porsche GT listening to its customers and wanting to deliver a car optimized for more engagement even at the cost of raw speed.

Out of curiosity, why doesn't the 991 PDK work in the 981? Is there some issue involving the engine being located ahead rather than astern of the gearbox that can't be resolved as easily as the 991 engine swap into the GT4 was? And if the 981 PDK won't work with the 9A1 motor either, what is the problem there? Inability to handle the additional torque?

FORENN

I didn't realize the TTS and Carrera S had PDK-S. I thought they were equipped with the standard PDK. Was there a time when I was right about this? I thought PDK-S was a better/quicker, race-designed PDK for only the GT3 and GT3RS (at least so far).

FORENN

I know, right? Not to mention things like war, poverty, and crime.

jphughan

I think that it's tacitly understood that when reading Rennlist, people should expect basically every complaint to be first world problems, or even one-percenter problems. But you feel free to go around to various threads where people are griping about deviated stitching costs and inability to get custom whatever on their builds and tell them to be mindful of war, poverty, and crime so they keep some perspective.

ExMB

That is my understanding as well. The gearing for the GT3 is completely different and faster shifting from those other 2.

BGB Motorsports

No no... i just meant that i think that's why you can't choose 6-spd or PDK. One thing is for certain, following the 991 GT3's only being available in PDK, they went out of their way to offer this car as a 6-spd and i think that the rush to get to market didn't leave time to develop a PDK specific for the car until they could gauge demand. You can tell that they had no idea the amount of hate mail they got from a PDK only GT3.

A 991 transmission needs to be turned around and flipped upside down to work in a Cayman and that's why when you put a 911 motor in a Cayman, the motor is the only thing 911 and every other single thing is still Cayman like exhaust, axles, gearbox so that it all lines up. On the PDK, when the trans is in a 991 or a 981 the LSD is still on the same side of the car so they can't be rotated and flipped.

GTgears

My understanding is that it is the same gearbox but with different ratios depending on application. I could be mistaken and maybe it isn't an "S" gearbox. The piece about the PTV+ is accurate though regardless of the name of the family of gearboxes. It's a completely different casting to accomodate what you guys are calling the E-diff. I believe there is only one of those castings being used across all cars using that LSD.

If they were to offer a high end PDK with PTV+ for the Cayman/Boxster family it would require a new casting because of the mid-engine. There are already 2 castings for these cars, one for PTV and one for non-PTV. PTV+ would require a 3rd gearbox case.

Quikag

haha, well said!

d00d

Hand raised, is there a general cost estimate to do this aftermarket?
The regular PDK would be acceptable, it doesn't have to be the GT3 specific PDK-S (pull both paddles for neutral, quicker shifts, non OD 7th, etc.), thanks.

FORENN

I meant the comment in fun. Sometimes such things don't translate well in internet posts.