Porsche PDK 7-Speed Transaxle (991.2 Carrera) gear ratios

The Porsche PDK 7-Speed Transaxle (991.2 Carrera) is a seven-speed dual-clutch transaxle.

First gear is 3.91:1 and 7th is 0.62:1. Divide one by the other and the overall spread is 6.31:1. That is a very wide spread. With seven gears to share it out, the steps in the middle can still stay civil.

7th is an overdrive at 0.62:1: the output shaft turns faster than the input shaft. Three of the seven gears are overdrives. No gear is exactly 1.00:1, so there is no direct drive.

The biggest step is 1st to 2nd, where the ratio drops 41%. The smallest is 5th to 6th at 16%. A drop that size lands the engine well down the rev range after the change, so it pays to know where the torque lives.

It is a transaxle, so the final drive sits in the same case: 3.44:1 as listed here. The speed table uses that figure and nothing else. With a 3.44 final drive and 225/45R17 tyres, 7th at 6,000 rpm works out at 336 km/h (209 mph), and first runs out at 53 km/h (33 mph). That is how tall the gear is, not a top speed. Drag and power decide that. At 70 mph in 7th the engine turns about 2,010 rpm.

Nearly the same box as the Porsche PDK 7-Speed Transaxle (991.1 Carrera / Carrera S): 3rd is 1.58 here and 1.65 there; 4th is 1.18 here and 1.30 there; 5th is 0.94 here and 1.08 there; 6th is 0.79 here and 0.88 there. That page is the one listed for search; this one stays for anyone after this exact version.