911 Turbo AWD (996) F6-3.6L Turbo (2001)
Control Module: Customer Interest
A/T - Grinding/Rattling Noise on Acceleration
911 Turbo (996)
Binder - 3, Transmission, Automatic
Tiptronic Transmission Noises
911 Turbo (996)
As of '01(1)
Tiptronic control unit adaption of the torque converter lockup.
Driving noises/jerking during acceleration.
Grinding/rattling noise when accelerating from a standstill or when driving at low speed in third gear 15 - 35 mph (30 - 50 km/h). Irregular/hard gear
changes and jerking during acceleration also occur occasionally.
The reason for this is the adaptation of the torque converter lockup clutch in the Tiptronic control unit. If the vehicle is driven in a restrained manner or
is frequently driven in stop-and-go traffic, the Tiptronic control module adapts itself to unfavourable values that cause the aforementioned complaints.
This problem arises only if the car is driven in a comfortable/economical manner and not when it is driven in a sporty manner.
Install a new Tiptronic control unit with modified software.
Introduction: 12th November 2002
99 53S 68 5844 USA
Install and code the new Tiptronic control unit, part number, 996.618.180.04, as described in the 911 Turbo (996) Technical Manual, Group 3,
Chapter 37 30 19
Carry out a test drive, making sure that all upshift and downshift points are reached. Do not switch the engine off after the test drive, but instead let
it idle for 10 minutes. The adaptation values will be written into the transmission control unit only after this time has elapsed.
911 Turbo (996) Technical Manual, Group 3:
Repairs: 37 30 19 - Removing and installing the Tiptronic control unit