The A50 Tiptronic gearbox was introduced with the release of the Carrera 2 in 1990. The first fully automatic gearbox offered for the 911 range as a sucessor to the semi-automatic Sportomatic gearbox offered on the 911SC during 1978-1983.

The four speed Tiptronic gearbox uses electronic controls to manage the gear changes - whether it be in fully automatic mode or in it's "tiptronic" manual mode. When in manual mode the driver decides when up and down changes are made, but the electronics actually make the changes. The gear and final drive ratios are given below.
A50/01
A50/02
A50/03
Spur pinion
1.100
1.100
1.100
1st gear
2.479
2.479
2.479
2nd gear
1.479
1.479
1.479
3rd gear
1.000
1.000
1.000
4th gear
0.728
0.728
0.728
Reverse
2.086
2.086
2.086
Final drive
3.667
3.667
3.555

The Tiptronic gearbox was only offered for the 2 wheel drive versions of the 964 although in all body styles except wide bodied Coupes since the only non-Turbo wide bodied Coupes were all 4WD Carrera 4s.

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