Porsche 911 Carrera Technical Manual page 162

Final drive -Differential, differential lock
911 Carrera (996)
2. Install cup springs so that the cambers
point inwards to the disc pack.
Disassembly and assembly instructions
Disassembly
1. Clamp the differential lock into the vice using
special tool 9646 and unscrew the crown
wheel screws.
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097_99
A -Cup spring
B -Outer disc
C -Inner disc
D -Thrust plate
563_98
2. Mark installation position of lid in relation to
housing for retrofitting.
3. Unscrew countersunk screws (no. 7), remove
lid and take out all inner parts. Mark thrust
rings for refitting.
Assembly
Note
Always replace the complete disc pack in the
case of repairs.
Replacing individual discs is not permitted.
1. Lightly oil all surfaces of the discs, thrust
rings and axles with transmission oil.
39 -205
39 40 37 Disassembling and assembling GKN differential lock -GT3
Printed in Germany -25, 1999 GT339201