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Home >> Porsche >> 2015 >> Cayman Base, Automatic DCT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 154 (40 - Front Wheel Suspension, Drive Shafts -- CARRERA (997)) >> WM 4000IN Tests/Notes For All-Wheel Drive (CARR. 4 Coupe, Turbo Coupe, CARR. 4S Coupe, TARGA 4, TARGA 4S, CARR. 4 CABRIO, CARR. 4S CABRIO, Turbo CABRIO) >> Information For Four-Wheel Drive Vehicles >> Controlled Four-Wheel Drive (PTM) On The 911 Turbo

Controlled Four-Wheel Drive (PTM) On The 911 Turbo

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2013 Porsche 911, 2012 Porsche 911, 2011 Porsche 911, 2010 Porsche 911, and 2009 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.

The PTM control unit (PTM = Porsche Traction Management) is specifically designed to suit the approved tire dimensions. The use of unapproved tires can result in different wheel speeds and can affect vehicle handling or cause PTM to switch off.

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