Frelander 2. Manual — part 372
Item
Part Number
Description
1
-
Right Hand (RH) half shaft
2
-
Oil seal
3
-
Taper roller bearing
4
-
Crown wheel drive gear
5
-
Casing
6
-
O ring seal
7
-
Taper roller bearings
8
-
Oil seal and flinger
9
-
Oil seal
10
-
Housing
11
-
Bolts
12
-
Pinion gear
13
-
Collapsible spacer
14
-
Pre-load nut
15
-
Drive flange
16
-
Flange head bolt
17
-
Oil seal and flinger
18
-
Transmission casing
19
-
Transmission differential
The power transfer unit comprises a crown wheel drive gear and a pinion gear drive shaft which are housed in a casing.
The crown wheel drive gear is mounted longitudinally across the unit. The Left Hand (LH) end of the gear has splines which
mate with corresponding splines in the transmission differential output sleeve. The drive gear is hollow which allows for
the fitment of the Right Hand (RH) half shaft. The half shaft is located through the hollow drive gear and mates with
splines in the transmission differential. The half shaft is driven by the transmission differential and receives no drive from
the power transfer unit.
The crown wheel is supported in the casing on opposing taper roller bearings which are pressed into the casing and the
housing. The drive gear is retained in the casing by a housing which is bolted to the casing and sealed with an O ring seal.
The housing is fitted with a triple edge oil seal and flinger on the outer end of the housing which direct dirt and moisture
away from the area of the drive gear. Another seal is fitted which prevents the ingress of dirt and moisture between the
drive gear and the RH half shaft.
The pinion gear is located in the housing at 90 degrees to the crown wheel drive gear. The pinion gear is supported in the
casing on opposing taper roller bearings. The pinion gear is retained in the housing with a pre-load nut. The outer end of
the pinion gear is splined and mates with the drive shaft output flange. The flange is secured with a flanged bolt which is
screwed into the pinion gear.
A collapsible spacer is located between the outer taper roller bearing and a shoulder on the pinion gear. The collapsible
spacer holds the bearing in alignment and also collapses under pressure applied to the pre-load nut. This allows the
pre-load nut to be tightened to a predetermined torque, which collapses the spacer, setting the correct bearing pre-load
and the correct meshing of the pinion gear and crown wheel drive gear teeth.
Drive from the transmission differential drives the crown wheel drive gear, which in turn rotates the pinion gear. Drive is
passed from the pinion gear to the drive shaft and the rear differential via the drive flange attached to the pinion gear
shaft.
Transfer Case -
Lubricants, Fluids, Sealers and Adhesives
Item
Land Rover Part No.
Input shaft splines grease
6G92M1C27AA
Power transfer unit fluid - vehicles with 3.2 petrol and 2.2 diesel
LR003137
Power transfer unit fluid - vehicles with 2.0 petrol
LR003136
Capacities
Description
Lubricant
Capacity (liters/pints/US quarts)
Power transfer unit
BOT 118 PLUS 75W -90
0.75/1.3/0.79
General Specification
Item
Ratio
3.2 Petrol auto
3.750:1
2.2 Diesel manual
4.533:1
2.2 Diesel auto
3.329:1
2.0 Petrol auto
2.583:1
Torque Specifications
Description
Nm
lb-ft
Axle mounting bracket bolts
24
18
Oil drain plug
35
26
Oil filler plug
35
26
Pinion nut
48
35
Power transfer unit front mounting bracket heat shield
10
7
Power transfer unit bracket to engine block bolts
65
48
Power transfer unit bracket to power transfer unit bolts
65
48
Power transfer unit to transmission housing bolts
65
48
Transfer Case - Transfer Case
Description and Operation
For additional information, refer to:
Four-W heel Drive Systems
(308-07A Four-Wheel Drive Systems, Description and
Operation).
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