Porsche 2012 911 GT3 CUP Technical Manual page 80

5.10.8. Centre position shift collar
1. Position dogs of the relevant idler gear centrally between the ends of
the shift fork. Afterwards push the shift collar away from the dog-ring to
be measured and measure the distance between the dog shift collar and
dog ring with a feeler gauge.
Bild anpassen
c
Since the dog hubs, on which the idler gear dogs are found, have axial
movement they should be pressed by hand towards the gear or the collar
during the measurement procedure. The measurement method must,
however, be identical for the dog collar of both gears.
The centre position of shift collar ½ is set by the washer H4.
The centre position of shift collar 3/4 is made with the washer SW1.
If the washer SW1 must be changed it should be noted that the
non-shouldered side of the washer is machined!
The centre position of shift collar 5/6 is set by the adjustment washer H5.
If it is not possible to centre the shift collar due to tolerance
reasons, the distance to the even gears (2,4 & 6) should be
greater than to the uneven gears.
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