Defender 90 NAS. Manual — part 44
44
AUTOMATIC GEARBOX
2
SPECIFICATIONS, TORQUE
ZF GEARBOX DATA
Axial end float
0.2 - 0.4 mm.
. . . . . . . . . . . . . . . . ...
0.008 - 0.016 in
From torque converter boss to torque converter
housing face
50 mm
. . . . . . . . . . . . . . . . . .
1.968 in
Freewheel cage assembly to ring gear;
minimum clearance
0.1 mm
. . . . . . . . . . . . . . ..
0.004 in
Output shaft dimension above cylinder F assembly
10.00 mm
. . .
0.394 in
A cylinder maximum protrusion above gearbox front
face
8.5 mm
. . . . . . . . . . . . . . . . . . . . ..
0.335 in
PROPELLER SHAFTS
1
DESCRIPTION AND OPERATION
PROPELLER SHAFT ALIGNMENT
Description
The front and rear propeller shafts have non-constant
velocity ’Hooks’ type universal joints, with needle roller
bearings. The bearing cups are pre-packed with
lubricant on assembly and a grease nipple is fitted for
servicing as specified, in maintenance section.
Both shafts have Rilsan coated sliding splines to
accommodate the variation in distance between the
axles and transmission. The splines are pre-packed
with lubricant and sealed.
The front shaft is a solid bar, which is shorter than the
rear, with the joints ’Phased’ at each end, A and B
mis-aligned. The phasing is necessary on the front
shaft only to allow for greater variation in angular
changes.
The rear shaft is a tube fitted with a conventional joint
at gearbox end and the sliding joint sealed with a
rubber gaiter.
Propeller shaft
1. Flanged yoke
2. Grease nipple
3. Journal spider
4. Needle roller bearing
5. Circlip
6. Splined shaft
7. Rubber gaiter (dust cap)
8. Splined shaft
PROPELLER SHAFTS
1
FAULT DIAGNOSIS
VIBRATION HARSHNESS
1. Check that the propeller shaft universal joints
and sliding splines are not siezed or worn and
that the shafts are correctly aligned.
NOTE: In the event that both shafts are
satisfactory, but the vibration/harshness is
still present, the transfer box operation
and balance of the road wheels should be
checked.
For transfer gearbox operation.
See TRANSFER
GEARBOX, Description and operation, LT230Q
Transfer Gearbox
For balance of road wheels.
See WHEELS AND
TYRES, Repair, Wheel Balancing
PROPELLER SHAFTS
1
REPAIR
PROPELLER SHAFTS
Service repair no - 47.15.02 - Front
Service repair no - 47.15.03 - Rear
Remove
1. Place vehicle over pit or on a ramp [hoist].
2. Remove nuts from each end of propeller shaft.
Remove shaft.
3. Scribe alignment marks on flanges at both ends
of propeller shaft to ensure correct refitting.
Overhaul
Service repair no - 47.15.11 - Front
Service repair no - 47.15.12 - Rear
4. Thoroughly examine universal joint for signs of
damage or wear. Replace if necessary.
5. Clean universal joint bearing cups and circlips.
CAUTION: To ensure correct assembly
and reduce possibility of imbalance.
Before removing propeller shaft joint. Mark
position of spider pin lubricator relative to journal
yoke ears.
6. Remove circlips, and grease nipple.
7. Tap yokes to eject bearing cups.
8. Remove bearing cups and spider.
9. Repeat instructions 4 to 7 for opposite end of
propeller shaft if necessary.
10. Clean yokes and bearing cup locations.
Assemble
11. Remove bearing cups from new spider.
12. Check all needle rollers are present and
positioned in bearing cups.
13. Ensure bearing cups are one-third full of
lubricant.
See LUBRICANTS, FLUIDS AND
CAPACITIES, Information, Recommended
Lubricants and Fluids
14. Enter new spider with seals into yokes of sliding
member flange.
15. Partially insert one bearing cup into flange yoke
and enter spider trunnion into bearing cup.
16. Insert opposite bearing cup into flange yoke.
17. Press both cups into place.
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