Version: 16.12.2014 - Porsche 2015 911 GT3 Cup Technical Manual

Limited-slip differential
The limited-slip differential is provided with 12 friction disks. The ramp angle of the
pressure pieces is 52° on the traction side and 30° on the coast side. When fitting,
pay attention to the correct orientation of the pressure pieces (illustration No.
2.3.4.2).
Operation
The pressure pieces (1) driven by the differential cage transmit the torque to the two
cross pin bolts (2). The differential gears pivoted on these bolts drive the output shaft
flanges by means of the lateral bevel gears. Depending on the torque gradient
(traction/thrust), the cross pin bolts move the pressure pieces out and press the
clutch disks (4), the pressure plates (3) and the cup springs (5) together.
Component overview
4
3
2.3.4.3
6
Basic blocking torque
The basic blocking torque of the limited slip differential is approx. 100 Nm (74 ft-lb)
when new.

Version: 16.12.2014

1 5
2
Powertrain
2.3.4.2
1 Pressure piece
2 Cross pin bolt
3 Pressure plate
4 Clutch disk
5 Cup spring
6 Drive shaft flange
911 GT3 Cup (991)
MY 2015
51