transmission JAGUAR X308 1998 2.G User Guide

Wh en t
he vehicle is being reco
vered by rear suspended tow:
The ignition key must be remo ved from the ig
nition switch to lock the stee
ring with the front wheels facing straight
ahead.
The re ar
wheels must be
correctly positioned in the lifting cradle and securely tied down.
Em
ergency Towing
WARNING: IF THE

ENGINE IS NOT
RUNNING, THE STEERING WILL BECOME HEAVY AND THE FORCE NECESSARY TO
EFFECTIVELY APPLY THE BRAKES WILL BE GREATLY INCREASED.
• CAUTIONS:
A vehicle with a defective transmission must be towed by rear suspended tow.
The vehicle towing point is not suit able for use with a solid tow-bar.
Do not use the crossbeam tie bar as a towing location.
When the vehicle is being towed on its own wheels:
Loc a
l regulations for the towing of ve
hicles must be followed. In some co untries the registration number of the
towing vehicle and an 'On Tow' sign or warning triangle must be displayed at the rear of the towed vehicle.
The gear s
elector lever
must be in Neutral.
The
ignition switch must be in positi
on II to release the steering lock and make the direction indicators, horn and
stop lamps operate.
A di
stance of 0.8 km (0.5 mi
le) must not be exceeded.
A spe
ed of 48 km/h (30 mph) must not be exceeded.
The tow rope must be attached using th
e towi
ng location provided; refer to Front Towing Point in this section.

Rear Su
spended
Tow

Jacking and Lifting - Using the Vehicle Jack
Gene
ral Procedures


1.
WARN
INGS:
ENSURE THAT THE VEHICLE IS STANDING ON FIRM, LEVEL
GROUND.
DO NOT START OR RUN THE ENGINE WHILE THE VEHICLE
IS ONLY SUPPORTED BY THE VEHICLE JACK.
Position the jack at the appropri ate front or rear jacking point.
Put the parkin
g brake ON and
the transmission in Park.
Chock the wh
eels to prevent movement of the vehicle.

2.
Locat e
the arm of the jack securely in the jacking socket.
R
e
move the rubber cover from the socket.
3. Raise/lower the vehicle using the jack ratchet handle.
4. Remove the jack from the jacking point.
Fi
t the rubber cover to the jacking socket.

WHE
N CHANGING A WHEEL, ENSURE THAT THE VEHICLE CANNOT MOVE. ALWAYS APPLY THE PARK BRAKE AND
SELECT TRANSMISSION 'P' POSITION.
NEVER RUN THE ENGINE WITH ONE WHEEL OFF THE GROUND, FOR EXAMPLE, WHEN CHANGING THE WHEEL. THE
VEHICLE COULD MOVE.
TIGHTEN THE WHEEL NUTS TO SPECIFICATION. WHEELS MAY COME LOOSE IF OVER OR UNDER TIGHTENED.
USE WHEELS AND WHEEL NUTS DESI GNED FOR XJ SERIES VEHICLES ONLY. AFTERMARKET WHEELS OR WHEEL
NUTS MAY NOT FIT OR FUNCTION PROPERLY AND COULD CAUSE INJURY OR DAMAGE.
In
spection and Verification
To maximize ti
re performance, inspec
t the tires frequently for signs of:
Unev
en wear.
Incorrect
ti
re pressure.
Wh
ee
l imbalance.
Cuts. Abrasi
ons.

B
u
lges (blister).
Ply s
e
paration.
Embedded objects. Impact damage.
Inspe c
tion should be
more frequent when:
Continuo
us high speed op
eration is required.
Ra
pid or extreme temperatures changes occur.
R
o
ad surfaces are rough.
Roads ar
e littered
with debris.
Tread W
e
ar Indicator
•
NO
TE: Tire condition must comply with prevailing local legislation.
New tires must be installed if the wear in dicators are exposed or if there is severe shoulder wear. Shoulder wear is usually
caused by either excessive camber or toe on tires.
T i
re Vibration Diagnosis
A
tir
e vibration diagnostic procedure always
begins with a road test. The road test and the custom er interview (if available)
will provide much of the information need ed to find the source of vibration.
During the road test, drive the vehicle on a road that is smooth and free of undulations. If vibration is apparent, note and
record the following:
The s p
eed at which the vibration occurs.
W
h
at type of vibration occurs in each
speed range - mechanical or audible.
How the vibrati
on is affected
by changes in the following:
- -engine torque
- -vehicle speed
- -engine speed.
Type of v i
bration - sensitivity:
- - torque sensitive,
- - vehicle speed sensitive,
- - or engine speed sensitive.

The
following explanations will help isolate the source of vibration.
Torque Sensitive
This

means that the condition can be impr
oved or made worse by accelerating, dece lerating, coasting, maintaining a steady
vehicle speed, or applying engine torque.
Ve
hicle Speed Sensitive
This means th
at the vibration al
ways occurs at the same vehicle speed and is not affected by engine torque, engine speed
or gear selection.
Engine Speed Sensit
ive
This means th
at the vibration
occurs at varying vehicle spee ds when a different gear is selected. It can sometimes be
isolated by increasing or decreasing engine speed with the tran smission in neutral or by stall testing with the transmission in
gear. If the condition is engine speed sensitive, the cause is probably not related to tires.
If the road test indicates that there is tire wine, but no shake or vibration, the noise originates with the contact between th e
tire and the road surface.
A thumping noise usually means that the tire is flat or has soft spots making a noise as they slap the roadway. Tire whine
can be distinguished from axle no ise, as tire whine remains the same over a range of speeds.
Sym
ptom Chart
Sy
mptom Chart
Sy

mptom
Possib
le Sources
Acti
on
Uneven ti

re wear.
Incorrect ti
re inflation.
*
Cor
rect to specification.
*
Exce
ssive radial an
d lateral runout.
*
Renew tire
or wheel.
*
O
ut of specification steering
geometry.
*
R
ealign steering geometry: Refer to Section 204-
00.
*
W
orn ball joint.
*
Renew
damaged component, realign steering
geometry.
*
W
orn tie-rod end.
*
R
enew component, realign steering geometry.
*
Incorrect
tire / wheel usage.
*
Inst
all correct tire and wheel combination.
*
Loose or leaki
ng shock absorbers.
*
Tigh
ten or Renew as nece
ssary: Refer to Section
204-00.
*
Suspensi
on geometry out of
alignment.
*
Che
ck and adjust: Refer to Section 204-00.
*
Loose, worn or da mage
d suspension
components.
*
In
spect, Repair or Renew as necessary.
*
Wh
eel and tire assembly out of
balance.
*
Balance wheel an
d tire assembly.
*
Excessive later
al or radial runout of
wheel or tire.
*
Check, Repair o
r
Renew as required.
*
Tire
s show excess wear on

edge of treads.
Ti
res under-inflated.
*
Cor
rect pressure to specification.
*
Vehi
cle overloaded.
*
Cor
rect to specification.
*
Tire
s show excess wear on

edge of treads (with tire
pressures correct).
Incorre
ct toe setting.
*
Se
t to specification: Refer to Section 204-00.
*
Tire
s show excess wear in
center of tread.
Tire
s over-inflated.
*
Cor
rect pressure to specification
*
W
heel mounting is
difficult.
Incorrect app
lication or mismatched
parts, including wheel studs and
wheel nuts. Corroded, worn or
damaged parts.
*
Fol
low the manufacturer's specifications. Clean or
Renew.
*
Wobble or sh
immy
affecting wheel runout.
Damaged wh
eel (eventually
damaging wheel bearings and causing
uneven tire wear).
*
Inspect wheel rims for
damage and runout. Renew
as required.
*
Vehicle vibrations from

Tire
s / wheels mismatched.
*
Inst
all correct tire / wheel combination.
*

Driveshaft -
Torques



Comp

onent
Nm
Bol
t
M12 - Jurid flexible coupling to
transmission and final drive flanges
75
-
88
Screw
-
Centre bearing to underbody
19
,5
- 26,5
Screw
-
Parking brake relay mounting bracket to underbody
19
,5
- 26,5_

Driveshaft - Driveshaft

Description an
d Operation
Driveshaft Joint and Couplings

Parts List


It
em
Par
t Number
De
scription
1—F

lexible (Jurid) coupling at the transmission flange
2—Center bear

ing
3—Front tu

be, including
deformable section
4—Fl
exible (Jurid) coupling at the final drive flange

Driveshaft - Driveshaft
Remo
val and Installation
Remov
a
l
CAUTI
O
N: To preserve 'drive line' refine
ment, individual parts, other than fixings, MUST NOT be renewed. In the event
of any balance or driveshaft component related problem, the complete assembly must be renewed. Under no circumstances
may the flexible (Jurid) coupling be remo ved from the driveshaft (or its fixings be loosened). Do not drop or subject the
driveshaft to damage.
1. Disc
onnect the battery ground
lead and raise the vehicle for
access
2. Remove the front exha ust muffler, 30.10.18

3. Re
move the driveshaft from
the transmission flange.
If required, 'match mark'

the transmissi on flang and
coupling
Unscrew the fi xings (3)

4. Relea s
e the parking brake relay
lever mounting bracket fixings
(4) and allow the assembly to hang down

5. Disc onne
ct the driveshaft fr
om the differential flange
5. CAUTION: Under no circumstances must the
flexible coupling (or its fixings) be loosened or removed
from the drive shaft
1. 'Match mark' the FLEX IBLE COUPLING to the
differential DRIVE FLANGE
2. Remove the fixings (3)
6. Re
move the driveshaft
6. CAUTION: Ensure that the driveshaft front and
rear sections do not become disengaged. Secure the front
and rear sections to preven t sliding joint disengagement
during transport

I
nstallation
•
NOTE: The large diameter driveshaft tu
be MUST be towards the transmission
R
emove the fixings (2) center
bearing to mounting bracket
1. Installation is the reverse of the removal procedure, noting
that;

2. R
efer to the illustration
E

nsure that the asse
mbly is central and that the bearing
housing does NOT contact the transmission tunnel

3. R
efer to the illustration

4. R
efer to the illustration - tran
smission AND final drive flanges
R
enew the driveshaft fixings

Re
ar Drive Axle/Differential -
Lubric
ants, Fluids, Sealants and Adhesives
Capacities
Torques


UnitSp
ecification
F
i
nal Drive
Shell Sp
irax Supe
r TS 90
Hub s
p
line to Axle shaft
Loct
it
e 270 Studlock or equivalent
UnitLi
t
ers
F
i
nal Drive
1,
90
Com p
onent
Nm
B
ol
t - Final drive nose plate
39
- 51
Bol t
- 'A' frame to final drive
9
0 -
110
Nu
t 'A' f
rame to rear mounting bracket
8
5 -
115
Nu
t -
Axle shaft to final drive flange
81
-
99
Nu
t -
Axle shaft to hub
3
04 -
336
N
u
t - Damper lower fixing
8
0 -
100
Bol
t
M12 - Jurid flexible coupling to
transmission and final drive flanges
75 -
88
N
u
t - Lower fulcrum
9
0 -
110
Nu
t -
Pendulum to final drive
1
60 -
200
N
u
t - Stabilizer to wishbone
30
-
40
N
u
t - Tie rod to final drive
8
5 -
105
Nu
t -
Tie rod to wide mounting bracket
8
5 -
115
Nu
t -
Wishbone pivot
8
0 -
100
N
u
t - Wishbone tie to final drive
8
5 -
105
N
u
t 'A' frame to wide mounting bracket
8
5 -
105

Comp
onent Tests
Bra
k
e Booster
1.
1. Chec k all
hoses and connections. All unused vacuum connectors should be capped. Hoses and their connections
should be correctly secured and in good condition with no holes and no collapsed areas. Inspect the valve on the
brake booster for damage.
2. 2. Check the hydraulic brake system for leaks or low fluid.
3. 3. With the transmission in PARK, stop the engine and apply the parking brake. Pump the brake pedal several times
to exhaust all vacuum in the system.
4. 4. With the engine switched off and all vacuum in the system exhausted, appl y the brake pedal and hold it down.
Start the engine. If the vacuum system is operating, the brake pedal will tend to move downward under constant
foot pressure. If no motion is felt, the vacuum booster system is not functioning.
5. 5. Remove the vacuum hose from the brake booster. Manifold vacuum should be available at the brake booster end
of the hose with the engine at idle speed and the transm ission in PARK or NEUTRAL. Make sure that all unused
vacuum outlets are correctly capped, hose connectors are correctly secured and vacuum hoses are in good
condition. When it is established that manifold vacuum is available to the brake booster, connect the vacuum hose
to the brake booster and repeat Step 3. If no downward movement of the brake pedal is felt, install a new brake
booster.
6. 6. Operate the engine for a minimum of 10 seconds at a fast idle. Stop the engine and allow the vehicle to stand for
10 minutes. Then, apply th e brake pedal with approximately 89 N ( 20lb) of force. The pedal feel (brake
application) should be the same as that noted with the engine running. If the brake pedal feels hard (no power
assist), install a new valve and then re peat the test. If the brake pedal still feels hard, in stall a new brake booster.
If the brake pedal movement feels spongy, bleed the brak e system. For additional information, refer to General
Procedures in this section.
Bra k
e Master Cylinder
Usual
l
y, the first and strongest
indicator of anything wrong in the brake syst em is a feeling through the brake pedal. In
diagnosing the condition of the brake master cylinder, check pedal feel as evidence of a brake concern. Check for brake
warning lamp illumination and the brake fluid le vel in the brake master cylinder reservoir.
Normal Conditio
ns
The fo
llowing conditions are considered norm
al and are not indications that the brake master cylinder is in need of repair.
New bra
ke systems are designed to produc
e a pedal effort that is not as hard as in the past. Complaints of light
pedal efforts should be compared to the pedal effort s of another vehicle of the same model and year.
The fl
uid level will fall with brake pad wear.
Abnormal Conditions
•

NOTE: Prior to carrying out any diag
nosis, make sure the brake system warning indicator is functional.
Changes in the brake pedal feel or brake pedal travel are in dicators that something could be wrong in the brake system. The
diagnostic procedure and techniques use brake pedal feel, warning indicator illu mination and low brake fluid level as
indicators to diagnosing brake system co ncerns. The following conditions are cons idered abnormal and indicate that the
brake master cylinder is in need of repair:
Brake ped a
l goes down fast. Th
is could be caused by an ex ternal or internal leak.
Brake pedal goes down slowly
. This could be
caused by an internal or external leak.
Brak
e pedal is low or feels spongy. This condition may be ca
used by no fluid in the brake master cylinder, reservoir