Discovery II
MANUAL GEARBOX - R380
OVERHAUL
37-43
Synchronizer assembly - 5th/reverse
$% 37.20.38
Disassembly
1. Remove gearbox rear extension.
OVERHAUL, Extension - gearbox rear.
2. Remove 5th gear set.
OVERHAUL, Gear - 5th gear set.
3. Remove split needle roller bearing from output
shaft.
4. Remove and discard Allen screw and remove
gear change yoke.
5. Remove and discard circlip securing 5th/
reverse synchronizer hub to output shaft.
6. Remove synchronizer hub and selector fork
assembly.
Reassembly
1. Clean gears, shafts, bearings and selector
fork.
2. Position selector fork to synchronizer, fit
assembly to output shaft and selector shaft. Fit
new hub retaining circlip.The fit of the circlip
is controlled by the selective washer behind
the reverse gear bearing collar on the
output shaft.
3. Adjust to give a reverse gear end-float of
0.005 - 0.055mm (0.0002 - 0.0021in).
4. Apply sealant, Part No. STC 50552 to threads
of new gear change lever yoke Allen screw.
5. Position gear change lever yoke and tighten
Allen screw to 25 Nm (18 lbf.ft).
6. Position split needle roller bearing to output
shaft.
7. Fit 5th gear set.
OVERHAUL, Gear - 5th gear set.
8. Fit gearbox rear extension.