1995 LAND ROVER DISCOVERY differential

51REAR AXLE AND FINAL DRIVE
2
OVERHAUL
12.Remove pinion head bearing with service tool
LRT-99-002.
13.Remove bolts and washers securing crown
wheel to differential flange. Remove crown
wheel.
14.Remove differential carrier bearings.
15.Remove circlips and extract differential cross
shaft.
16.Withdraw differential gears and pinions.
17.Clean all components.
INSPECTION
18.Check all bearings for wear and pitting.
19.Check all gears for wear, scuffing, pitting and
damaged teeth.
20.Supplied as matched sets are: crown wheel and
pinion, pinion housing and bearing caps.
ASSEMBLE
Differential gears
21.Fit differential gears to differential housing.
22.Fit differential cross shaft and circlips.

REAR AXLE AND FINAL DRIVE
3
OVERHAUL 23.Check gear for freedom of rotation and backlash.
Nominal backlash should be present. Excess
backlash necessitates replacement of gears or
differential housing.
24.Check serial number marked on pinion end face
matches that on crown wheel.
25.Clean and fit crown wheel.
26.Fit carrier bearings and assemble tracks to
bearings.
27.Place differential housing with crown wheel and
bearings in pinion housing.
28.Fit bearing caps and bolts. Do not tighten bolts.
29.Fit bearing adjusting nuts and adjust to obtain
zero end float.
30.Tighten bearing cap bolts to90 Nm.
31.Check crown wheel for run-out. This should not
exceed 0,10 mm. If exceeded examine crown
wheel and mounting flange for burrs, grit, etc.
Refit and recheck. A buckled or damaged
differential housing flange is corrected by
replacing differential gear housing.
32.After checking run out remove differential
housing from pinion housing.
33.Remove crown wheel bolts and refit using
Loctite 'Studlock'. Tighten to
58 Nm.
34.Fit pinion head bearing track and original shim to
pinion housing. Use service tools LRT-54-505
and LRT-54-506. If fitting a new shim use
minimum 1.27 mm thickness.

51REAR AXLE AND FINAL DRIVE
4
OVERHAUL 35.Fit pinion outer bearing track to pinion housing.
Use service tools LRT-54-505 and LRT-54-507.
36.Fit pinion head bearing to pinion. Use service
tool LRT-54-502.
37.Fit pinion into its location without shims for
bearing pre-load.
38.Fit outer bearing, and spacer (front axle
differential only).
39.Fit driving flange, washer and nut.
40.Do not fit oil seal at this stage.
41.Tighten pinion flange nut until force required to
rotate pinion is
3Nmif new bearings are fitted.
This will pre-load bearings to check pinion height
dimension.
NOTE: If using original bearings, pre-load
figure is 1.5 Nm.
Drive pinion markings
NOTE: Markings on end face adjacent to
serial number are of no relevance to
servicing.
42.Figures marked on end face opposite to serial
number show in thousandths of an inch,
deviation from nominal, required to set pinion.
Pinions marked plus (+) must be set below
nominal. Pinions marked minus (-) must be set
above nominal. Unmarked pinions must be set at
nominal.

REAR AXLE AND FINAL DRIVE
5
OVERHAUL
43.Nominal setting dimension is represented by
setting gauge block LRT-54-503. Referenced
from pinion end face to bottom radius of
differential bearing bore.
Drive pinion adjustment
44.Ensure pinion end face is free of burrs around
etched markings.
45.Remove keep disc from magnetized base of dial
gauge tool.
46.Place dial gauge and setting block on surface
plate. Zero dial gauge trace pin on setting block.
NOTE: Setting block has three height
settings heights.
Use 39.50mm setting mark for this differential.
Pinion height shims
PART No. INCH MM
FTC3853 .061 1.548
FTC3854 .060 1.523
FTC3855 .059 1.498
FTC3856 .058 1.473
FTC3857 .057 1.448
FTC3858 .056 1.423
FTC3859 .055 1.398
FTC3860 .054 1.373
FTC3861 .053 1.348
FTC3862 .052 1.323
FTC3863 .051 1.298
FTC3864 .050 1.273
FTC3865 .049 1.248
FTC3866 .048 1.223
FTC3867 .047 1.198
FTC3868 .046 1.173
47.Position dial gauge centrally on pinion end face,
register on lowest point on one differential
bearing bore. Note dial gauge measurement
from zeroed setting.

51REAR AXLE AND FINAL DRIVE
6
OVERHAUL 48.Repeat on other bearing bore. Add readings
then halve sum to obtain mean reading. Note
whether trace pin has moved up or down from
zero.
A. Where trace pin moves down, reading is
equal to thickness of shims to remove, to
bring pinion to nominal.
B. Where trace pin moves up, reading is
equal to thickness of shims to add, to bring
pinion to nominal.
49.Before adjusting shim thickness: check pinion
face marking. If a plus (+) figure, subtract in
thousandths of an inch from shim thickness
figure.
50.If pinion has a minus (-) figure, add amount to
shim thickness figure.
Adjust shim thickness under pinion head bearing
track as necessary.
INCH MM
.001 = .025
.002 = .05
.003 = .075
.004 = .10
.005 = .125
.006 = .15
.007 = .175
.008 = .20
.009 = .225
.010 = .25
NOTE: Where dial indicator is metric
conversion must be made to inches when
measuring and selecting shims.
51.Recheck pinion height setting. If setting is
correct, mean reading of dial gauge will agree
with figure marked on pinion end face.
For example, with end face marking of +3, dial
gauge reading should indicate pinion is +0.003
in.Bearing pre-load adjustment
52.Remove the pinion flange, pinion, outer bearing
and spacer.
53.Slide new shim, of same thickness as original
(bearing pre-load) into position on pinion shaft. If
fitting a new shim use thickest shim 2.155 mm.
54.Fit pinion to pinion housing and fit outer bearing
and spacer (front differential only).
55.Fit driving flange, washer and nut.
56.Do not fit oil seal at this stage.
57.Tighten pinion flange nut to130 Nm.Force to
rotate pinion shaft is 3Nm using new bearings.
Change shim as necessary to obtain reading.
Thicker shim will reduce pre-load. Thinner shim
will increase pre-load.
NOTE: If using original bedded in
bearings, pre-load figure is 1.5 Nm.
58.Remove pinion flange.

REAR AXLE AND FINAL DRIVE
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OVERHAUL PINION PRELOAD SHIMS
PART No. INCH MM
FTC3869 .085 2.155
FTC3870 .084 2.130
FTC3871 .083 2.105
FTC3872 .082 2.080
FTC3873 .081 2.055
FTC3874 .080 2.030
FTC3875 .079 2.005
FTC3876 .078 1.980
FTC3877 .077 1.955
FTC3878 .076 1.930
FTC3879 .075 1.905
FTC3880 .074 1.880
FTC3881 .073 1.855
FTC3882 .072 1.830
FTC3883 .071 1.805
FTC3884 .070 1.780
FTC3885 .069 1.755
FTC3886 .068 1.730
FTC3887 .067 1.705
FTC3888 .066 1.680
FTC3889 .065 1.655
FTC3890 .064 1.630
FTC3891 .063 1.605
FTC3892 .062 1.580
FTC3893 .061 1.555
FTC3894 .060 1.530
FTC3895 .059 1.505
FTC3896 .058 1.480
Fitting Pinion Oil Seal
59.Coat outer diameter of seal with grease. Fit seal
lip side leading flush with end face of housing
using tool LRT-51-001.
Fit pinion drive flange - front axle differential
60.Lubricate seal lips with axle oil.
61.Fit spacer and pinion drive flange to differential.
62.Secure flange with washer and nylon nut.
Tighten to
130 Nm.
Fit pinion drive flange - rear axle differential
60.Lubricate seal lips with axle oil.
61.Fit pinion drive flange to differential and secure
with washer and nylon nut. Tighten to
130 Nm.
62.Coat centralizing peg with Loctite 601 or 638 and
fit over pinion retaining nut in drive flange.

51REAR AXLE AND FINAL DRIVE
8
OVERHAUL CROWN WHEEL/PINION BACKLASH
ADJUSTMENT
63.Place differential housing in pinion housing.
64.Fit bearing caps and partly tighten bolts.
65.Fit bearing adjusting nuts.
66.Mesh crown wheel to pinion. Using service tool
LRT-54-508 loosen left bearing adjuster nut.
67.Tighten right nut until crown wheel/pinion
backlash is just removed.68.Tighten left nut until it contacts bearing. Continue
turning until a backlash of 0,10 to 0,17 mm is
met.DO NOTloosen right nut otherwise bearing
preload will be affected.
69.Fit locking fingers and roll pins. Align locking
finger with a slot.
70.Evenly tighten bearing cap bolts to
90 Nm.
71.Recheck crown wheel/pinion backlash.
72.Lubricate bearings and gears.

REAR AXLE AND FINAL DRIVE
1
SPECIFICATIONS, TORQUE AXLE DIFFERENTIAL DATA
Pinion bearing pre-load:
(new bearings) 3 Nm........................................................
(bearings bedded in) 1,5 Nm...............................................
Crown wheel run-out 0,10 mm........................................................
Crown wheel/pinion backlash 0,10 to 0,17 mm...........................................
REAR HUB
Rear hub end float 0,010 mm............................................................
TORQUE VALUES
NOTE: Torque wrenches should be regularly checked for accuracy to ensure that all fixings are
tightened to the correct torque.
Nm
REAR AXLE
Pinion housing to axle case 41.......................................................................
Crown wheel to differential case 58................................................................
Differential bearing cap to pinion housing 90..................................................
Differential drive flange to drive shaft 47.........................................................
Bevel pinion nut 129........................................................................................
Lower link to axle 176......................................................................................
Pivot bracket ball joint to axle 176...................................................................
REAR HUB ABS VEHICLES
Hub driving member to hub 65 *.......................................................................
Brake disc to hub 73 *......................................................................................
Stub axle rear to axle case 65........................................................................
Brake caliper to axle case 82..........................................................................
Disc shield to axle case 11.............................................................................
Sensor ring to brake disc ABS 9....................................................................
* Apply loctite 270 prior to assembly.