Discovery II
MANUAL GEARBOX - R380
37-46
OVERHAUL
Bearing - layshaft rear support
$% 37.20.58
Disassembly
1. Remove extension housing.
OVERHAUL, Extension - gearbox rear.
2. Remove 3 Torx screws, remove oil pump and
discard 'O' ring.
3. Drift out layshaft support bearing.
4. Using a suitable two legged puller remove 5th
gear layshaft support bearing track from end of
layshaft.
Reassembly
1. Clean layshaft and bearing recess in extension
housing.
2. Fit layshaft support bearing.
3. Clean oil pump recess in extension housing,
ensure screw holes are clean and dry.
4. Lubricate oil pump recess in housing with
gearbox oil.
5. Lubricate a new 'O' ring with gearbox oil and fit
to oil pump.
6. Locate oil pump in extension housing with word
'TOP' towards top of housing.
7. Align fixing screw holes and tap pump lightly
around edges until pump is fully in housing. Do
not pull pump into housing by tightening
screws.
8. Fit Torx screws and tighten to 6 Nm (4.5 lbf.ft).
9. Apply a small amount of heat and fit support
bearing track to layshaft.
10. Fit extension housing.