Porsche 911 GT3 Cup 2008 Technical Handbook page 31

Check the free play of the 1
dog-ring guide hubs.
Select the gears and bring the dog-ring into position by hand.
There should be 0.1mm play, on each side, between the dog-
ring and selector fork.
Attention: Insufficient gear-selector fork play can be
adjusted by fitting the spacer ring H3. (H3 spacer ring,
see sketch in appendix).
Loosen the collared input and pinion gear shaft nuts.
Remove the reverse gears, 5
Remove the cut away housing and fit the gear wheel housing
th
Fit the reverse gears, 5 / 6
Tighten the collared input and pinion shaft nuts.
Fit the special reverse gear tool 996.450.311.9A.
Engage reverse gear by rotating the selector barrel.
Slide the selector fork and dog-ring till reverse gear is fully
engaged.
Attention: There must be play on both sides between the
selector fork and dog-ring.
Tighten the clamping screw in this position.
Attention: The reverse gear selector fork clamp screw must
only be tightened when the cut away housing is in position
Remove the cut away gearbox cover.
Fit the oil tube, without the use of excessive force, to the
casing and locate in position with the retaining screw.
Attention: If fitted incorrectly, the oil tube can collide
with the gear shift forks.
When the oil tube is fitted correctly it is visible through the
bore in the differential housing.
This visual check is only possible with the differential
removed.
st nd th
/2 and 5 /6
th th
/ 6 gears etc
th
gears etc
th
gear
26