Porsche 928 Workshop Manual page 726

928
Manual Transmission/Gears and Shafts
35
DISASSEhlBLING AND ASSEMBLING SYNCHRONIZERS
The transmission of the 9'28 is equipped with modified Porsche synchronization for all forward speeds.
One of the changes is the "mission of circlips. which previously were used to keep the synchronizing
ring thrust blocks and shift bands from moving axially. In the new system this is accomplished by a
shift sleeve with beveled flanks.
1st Gear
Synchronizer ring:
Thrust block:
Shift band:
stop:
Installation Note:
, \ , \ ! \ ",
2nd Gear
Synchronizer ring:
Thrust block:
Shift band:
stop:
Installation Note:
3rd Gear
Synchronizer ring:
Thrust block:
Shift band:
stop:
1 groove on face
2 bevelled flanks
Asymmetrical shift band
Two straight flanks
Short side of shift band must
be to right of thrust block
2 grooves on face or red dot
2 bevelled flanks
Symmetrical shift band
1 straight. 1 bevelled flank
Bevelled side of stop must
face to right as seen from
top view
2 grooves on face or red dot
2 bevelled flanks
2 separate shift bands
Bevelled flanks
Printed in Germany
Disassembling and Assembling Synchronizers
35 - 17