ECU JAGUAR X308 1998 2.G Manual PDF

Rear
Suspension - Rear Suspension
Description an
d Operation

Description
The i
ndependent rear suspension incorporates co-axial sp
ring and shock absorber units, a subframe, wishbone tie,
pendulum assembly, mounting brac ket, differential strut, cast wishbones and hub carriers. The suspension assembly is
positively located by the subframe, mounting bracket and differential strut.
Each wi
shbone pivots on a fulcru
m bolt which locates in the wishbone tie and pendulum assembly.
The wish
bone tie and pendulum assemblies are respectively in
stalled at the front and rear of the final drive housing.
The differential
strut is secured to the wishbone tie assembly.
Two ti

e rods are installed between the front of the
subframe and the top of the final drive housing.
The ou
ter extremity of each wishbone
is secured to its respective hub carrier assembly by a fulcrum bolt.
Each fulcrum bolt head incorporates an ec centric circular flange which locates in a groove in the front face of the wishbone
arm. Rotation of the fulcrum bolt results in horizontal movement of the bolt shank in an elongated hole in the rear of the
wishbone arm. This acti on achieves corresponding movement of the hub carrier, facilita ting adjustment of road wheel toe-
in.
It
em
Par
t Number
De
scription
1—Hub Carrier
2—Wi

shbone
3—Sprin

g
4—Shock Absorber
5—Suspensi

on Turret

6—Suspensi
on Subframe
7—Moun

ting Bracket
8—D

ifferential Strut
9—Stabilizer Ba

r (Supercharged and
Sport Suspension Models only)
10—Bum
p Stop

Each r
oad spring and is located between the wishbone in
tegral spring seat and the body suspension turret.
Each shoc
k absorber unit is installed
co-axially within the road spring.
The lo
wer end of each shock absorber is secured to the
wishbone by a bolt which also functions as a pivot.
Adaptive damping is av
ailable as an option.
A
rear stabi
lizer bar is installed on
Supercharged and Sport Suspension models . Mounted at the rear of the wishbone
tie assembly, the stabilizer bar is connected to the wishbone by short links.
Op era
tion
As each road wheel r
i
ses, move
ment is transmitted through th e hub carrier assembly to the wishbone and axle shaft. The
corresponding rise of the wishbone compre sses the road spring and partially telescopes the shock absorber. During this
action, the spring absorbs result ing shocks and the shock absorber minimizes spring oscillation.
During cornering, vehicle weight is transferred to the outer road wheel with a resulting tendency for the inner wheel to lift.
On Supercharged and Sport Suspension vehicl es, a rear stabilizer bar assists in minimizing this tendency by transferring a
proportion of potential lift of the inner wheel to the outer wheel. This results in enhanced body stability with improved
cornering capabilities.

Rear Suspension - Axle B
ump Stop
Re
moval and Installation
Remov

al
CAUTI
ON: Replacement of
nuts and bolts: Various thread-locking devices are used on nuts and bolts throughout the
vehicle. These devices restrict the number of times a nut or bolt can be used. See section 100-00 for information.
I
nstallation
1.
R
aise rear of vehicle and support
on stands. Refer to Section
100-02.
2. Remove appropriate road wheel. Refer to Section 100-02.

3. Remove bolts securing bump stop to body.

4. Remove bu
mp stop and where applicable, reinforcement
bracket from vehicle.

1. Position reinforcemen t brac
ket (where a
pplicable) and bump
stop on vehicle.
2. Install bump stop bolts and tighten to 26-34Nm.

Rear
Suspension - Rear Susp
ension and Axle Assembly
Re
moval and Installation
Remov

al
1.
CAUTI
ON: Replacement of nuts and bolts: Various
thread-locking devices are used on nuts and bolts throughout the
vehicle. These devices restrict the number of times a nut or bolt
can be used.
For additional informat ion, refer to Section 100
-0
0 General
Informati

on
.
R
aise the rear of the vehicle
and support on axle stands.
For additional informat ion, refer to Section 100
-0
2 Jacking and
Liftin

g
.
2.
R
emove the rear wheels.
For additional informat ion, refer to Section 204
-04
Wheels and
Tire

s
.

3. CAUTI
ON: Do not suspend the caliper from the brake
hose as this will damage the hose.
• NOTE: Right-hand shown, left-hand similar
Remove the brake calipers from the carriers.
1. Remove the caliper spring clip.
2. Remove the guide pin dust caps.
3. Slacken and withdr aw the guide pins.
4. Remove the caliper from the carrier and secure to the suspension mounting bracket using a tie strap.

4. NOTE
: Right-hand shown, left-hand similar
Disconnect the wheel speed sensor electrical connectors.
5. NOTE: Right-hand shown, left-hand similar
Remove and discard th e tie straps securing the wheel speed
sensor harnesses to the brake hose clips.

Position a suitable piece o
f wood between the jack and the
rear suspension and axle assembly.
Rai s
e the jack to take the weight of the rear suspension
and axle assembly.

14 . NOTE
: Left-hand shown, right-hand similar
Remove the exhaust mounting to suspension bracket bolts.

15 . NOTE
: Right-hand shown, left-hand similar
Remove and discard the subframe front mounting brackets to
body bolts.

16 . NOTE
: Right-hand shown, left-hand similar
Remove the subframe front mounting brackets.
Remove an d discard the mount
ing bracket to subframe
bolts.
R e
move the front mounting bracket.
17. NOTE: Left-hand shown, right-hand similar
Remove differential strut upper mounting to body bracket
securing bolts.

18
.
Install the brake caliper on to the carrier.
1. Position the caliper asse mbly on to the carrier.
2. Install the guide pins and tighten to 25-30 Nm.
3. Install the dust caps.
4. Install the brake caliper spring clip.

19
.
Connect the wheel speed sensor electrical connector.

20
.
Using a new tie strap, secure the wheel speed sensor harness
to the brake hose clip.
21. Install the rear wheels.
For additional informat ion, refer to Section 204
-04
Wheels and
Tire

s
.
22
.
Remove the axle stands and lower the vehicle.
For additional informat ion, refer to Section 100
-0
2 Jacking and
Liftin

g
.
23
.
Check and adjust the rear whee l alignment as necessary.
For additional informat ion, refer to Section 204
-00
Suspension


Sy

stem
- General
Information
.

Rear Su
spension - Rear Shock Absorber
Re
mo
val and Installation
Remov
a
l
S
p
ecial Tool(s)

Spri
ng C
ompressors
204-179 (JD 199)

Spri ng Re
taining straps
204-179-1 (JD 199-1)
1. CAUTION: Replacement of nuts and bolts: Various
thread-locking devices are used on nuts and bolts throughout the
vehicle. These devices restrict the number of times a nut or bolt
can be used.
For additional informat ion, refer to Section 100
-00
General
Informati
o
n
.
R a
ise the rear of the vehicle
and support on axle stands.
For additional informat ion, refer to Section 100
-02
Jacking and
Liftin
g.
2. Re
move the relevant rear wheel.
For additional informat ion, refer to Section 204
-04 W
heels and
Tire
s.

3. CAUTIO
N: Do not suspend the caliper from the brake
hose as this will damage the hose.
Remove the brake caliper from the carrier.
1. Remove the caliper spring clip.
2. Remove the guide pin dust caps.
3. Slacken and withdr aw the guide pins.
4. Remove the caliper from the carrier and secure to the suspension mounting bracket using a tie strap.
4. Disc
onnect the wheel speed sensor electrical connector.

5. Remove an
d discard the tie st
rap securing the wheel speed
sensor harness to the brake hose clip.

6. Mark the wi
shbone at the pivot
pin eccentric flange marker to
aid installation.

7. Remove the
pivot pin nut and washer.
8. CAUTION: To prevent damage to the parking brake cable,
the hub carrier must be supported on removal from the wishbone.

R
emove the hub carrie
r from the wishbone.
R
emove the pivot pin from the hub carrier.

Withdraw th
e hub carrier and support on a block of wood.

9. CAUTIO
N: Note the position of
the shims during removal.
They must be returned to th eir original position during
installation.
Noting their positions, remove the shim from each end of the
pivot pin sleeve.

10 . WAR
NINGS:
ENSURE THE SPECIAL TOOLS ARE POSITIONED
DIAMETRICALLY OPPOSITE ON THE SPRING AND THE ARMS ARE
CORRECTLY SEATED .
WHEN COMPRESSING THE SPRING, TIGHTEN THE
SPECIAL-TOOL ADJUSTMENT BOLTS EVENLY.
Compress the spring.
Install and alig n th
e special
tools 204-179 diametrically
opposite on the spring.
Eve n
ly tighten the special tool tensioning bolts to
compress the spring.

11 . R
emove the shock absorber to
wishbone mounting nut and
bolt.
12. Remove the nuts securing th e shock absorber and spring
upper mounting to the body.

13
.
Using the special tools 204-179-1, secure the upper mounting
to the spring.

14
.
Using a jack, retract the shock absorber through the
wishbone aperture.

15
.
Position a bolt through the spring coils and shock absorber
lower-bush, to temporarily locate the shock absorber.
16. Partially lower the jack for a ccess to the top of the shock
absorber.
17. On vehicles with adaptive damping:
Di
sconnect the shock absorber electrical connector by
pressing the lugs down and pulling the connector up.