First Drive: 2009 Porsche Cayman S PDK
Perfect Driving Kompanion: Is This Finally a Better Sports Car Than the 911?
As the formal press introduction for the revamped Porsche Cayman S broke up and the international mix of scribes (including some Russians for the first time in my experience) clicked off their interpreter headsets, it was time to mingle around and ask some questions. First stop: the cut-away display of the new doppelkupplung transmission. Or for those of us stumped by words that appear to have come out of the operating manual of a U-Boat, the Porsche double-clutch gearbox, or just PDK for short.
Pointing to the PDK's various exposed innards, I kept trying to cajole a Porsche engineer, through an interpreter, into explaining what's really so different here from the double-clutch trannies right now in Audi and Mitsubishi showrooms. The engineer would stare at the interpreter, listening. Then pause for a long time. And then, almost reluctantly, point to what seemed to me to be minor details: an unusually located oil pump, Or maybe a small, oil-delivery channel to a bearing. To be honest, I was starting to feel sorry for the guy. There didn't appear to be very much original here at all; and then I realized what a short-sighted viewpoint this is.
I mean, this whole, glistening beehive of meshing teeth and concentric clutches was Porsche's baby in the first place. It's just...er, spent a rather long time in the oven. Back in 1981, a PDK-same basic idea-furtively appeared in a 956 race car, and then was quietly salted away until it was deemed that Moore's law of ever-doubling computer power had finally caught up with the necessary software.

After driving a couple of Cayman S's fitted with the thing, I'd say the computing power has caught up rather nicely. It's tempting the wrath of some of you, but I now think the concept of traditional manual shifting ought to be officially boxed up and quietly placed into the technological attic alongside crank-starting and diddling with ignition-advance levers on the steering column. While Porsche's PDK is actually replacing its automatic-based Tiptronic transmissions, inevitably it's going to slowly marginalize the traditional heel-and-toe manual right into oblivion. Trust me, the day will come when the last of its octogenarian practitioners finally has a hip replacement and just can't crook that arthritic old right leg sideways anymore. And that will be that. (Until then, last year's five-speed manual gains an extra cog for those of you hopelessly fixated on slow, inexact shifting).

If you overlay the PDK's details atop today's typical double-clutch fare, what stands out most is its exquisitely subtle software and seven-speed range of ratios (the first six being relatively short while the top cog is dialed fairly tall for cruising efficiency). Although Porsche claims its shifts are 60 percent quicker than a fast-stirred manual, in a sense they take no time at all as the clutches' handoff is so refined there's no appreciable moment of zero torque. Slap it into Drive and its autonomous shifts are as fluid and logical as any slushbox automatic's.
While there is a toggleable shifter lever sprouting from the center console, it seems almost symbolic. Ninety-nine percent of the time, the steering wheel switches will be taking the gear-change orders, and Porsche's switchery consists of two small chunks of putty-shaped aluminum that slot through notches in the tops of the right and left spokes. Notably, each operates in exactly the same way. They're not "handed": Thumb-press either to upshift, trigger-pull either to downshift. The ergonomic logic here has its naysayers, but I rather like the left and right symmetry. No need to mentally track which spoke is which. Just find one and either push or pull the doohickey.



