nhnguy12

I had previously mentioned that I would be looking into installing an aftermarket differential at some point this winter season. I am now more on the fence of whether this is a good idea for my situation. Since living with the PTV setting enabled I have felt less and less of the need for a mechanical LSD. I think the braking of the inside wheel has more of a positive impact when accelerating out of corners than I had originally given it credit for. With my driving habits (daily driving with weekend excursions to twisty roads) it is exceedingly rare that I feel like the absence of a locking diff slows me down. YMMV depending on how you use your car and your driving style.

Another factor I have to keep in mind is that my car has 105k spirited miles on the clock. As solid as the PDK has proven to be, I am apprehensive about installing new (and expensive) parts onto an older transmission. I have recently discovered that Porsche sells tons of variants of remanufactured PDK boxes. You can order a PDK from a 2.7L 981 w/ the PTV optioned (9G2-300-021-AX), which fits directly into the 3.4L chassis. This is not a cheap option but it would be significantly cheaper than transplanting an aftermarket LSD onto a new transaxle if/when my older PDK fails. Going down this path would give you:
- OEM clutch-style LSD
- Marginally shorter gearing (~3%)
- A new/remanned clutch
- Limited factory warranty (12 months)

So I think for now I will be biding my time and if my PDK box ever gives me any trouble I will replace it with a remanned box w/ a factory LSD. I want to shout out @BGB Motorsports for the above information regarding remanufactured PDK boxes. They have long been a pioneer for the 981 platform and have been great about answering my questions over the years. Would highly recommend contacting them for your 981 Cayman/Boxster needs!

TDS

PTV is doing the work on the way into the corner as you turn in, the LSD which you don't have fitted would be doing the work on the way out.

PTV plus isn't available on the 981, only PTV. I'd like the lsd on mine for fun but I've never felt it was a necessity as traction out of the corner is seldom an issue with this chassis.

Richard.

and just to clarify as it should be obvious but wasnt to me, this is under the initial PASM main menu item

Richard.

this is what I meant sorry, under PASM main menu

Nip are

Great info here. ABD aka BLD brake lock differential has been around for a long time and is used on jeeps and other off roaders to simulate an LSD. Depending on how hard you drive ABD probably has more impact on brake wear than PTV.

Many thanks to the OP for testing and posting PTV results on his car. I also appreciate the comments on turn in feel compared to more nimble cars like Miatas. I had a modded ND1 before my BS and do miss the quick turn in. But in my case I think it has more to do with front end geometry and tires.