wheel torque JAGUAR XJ6 1994 2.G Workshop Manual

1. SERVICE TOOLS & EQUIPMENT
Illustration I JaauarNumber I -
18G 1465
Description Notes
Engine lifting brackets
Engine
fl support beam
11. TORQUE TIGHTEN1 NG SPEC1 FICA TIONS
Fixing Tightening Torque
(Nm)
49 - 54
8- 10
22 - 28
22
- 24
23 - 27
7 - 10
95 - 105
23
- 27
15
-18
23
- 27
Bell housing to adaptor plate
Bleed nipple to slave cylinder
Center bearing to body
Center bearing to mounting plate
Clutch cover to flywheel
Clutch damper to mounting bracket
Flywheel to crankshaft
Front cover to transmission
Front pipe to intermediate pipe
Gearshift lever
housing to transmission
Issue 1 August 1994 ii X300 VSM

Manual Transmission & Clutch (AJl6)
0
7.1.13 CLUTCH FAULT DIAGNOSIS
symptom
lifficult gear ?ngagement
3attling clutch
squeaking clutch
dibrating clutch or
:lutch judder (often pre- :eded by clutch grab)
stiff clutch operation
Possible Cause
Hydraulic system
defects
Operating mechan
- ism faults
Clutch unit faults
Primary pinion bear
-
ing fault
Clutch unit faults
Defects other than in
clutch unit
Operating linkage
fault
Check
Check fluid level in reservoir
Check for air in the system
Check for defective pedal
Check for damaged pressure plate
Check splines on clutch driven
plate and primary pinion shaft for
wear
Check clutch driven plate for loose
or broken springs and for warping
Check for wear in the clutch with
- drawal mechanism
Check for worn primary pinion
bearing
Check for seizing on primary shaft
or in flywheel
Check the clutch driven plate for
distortion and damage and for
loose or broken torque damper
springs
Check for oil and other foreign
matter on the clutch friction linings
Check for incorrectly fitted clutch
pressure
plate
Check that contact witness on fric-
tion linings is evenlv distributed -
Check for loose flvwheel fixings
and flywheel
run-out
Check for loose engine mountings
Check for worn drive (propeller)
shaft universal joints
Check for bent primary pinion
shaft
-
Check for damaged moving parts
in operating linkage
- -
Check for seized linkage, recheck
operation after remedv
Remedy
Replenish as necessary and
bleed system if necessary
Bleed the system
Renew return spring if
necessary
Renew pressure plate
Renew as necessary clutch
plate or primary pinion
Renew driven plate
Renew as necessary
Renew as necessary
Lubricate or renew as
necessary
Renew driven plate
Renew driven plate and clean
related parts
Dismantle from clutch and
refit where applicable
Renew driven plate as
necessary
Tighten to correct torque
loading
Lubricate linkage as
necess-
X300 VSM 11 Issue 1 August 1994

Manual Transmission & Clutch (AJ16)
'ossible Cause
:Iutch Fault
'rimary pinion bear-
ng
ncorrect fitting nethod
Clutch Fault Diagnosis
Check
Check for worn clutch driven plate
hub splines
Check for wear in bearing
Damage may be caused by
acci- dental loading during fitting
Symptom
:I utch knocks
herloading vehicle
hiving with
left foot
,esting on clutch )edal
:ractured clutch )late
Check mating components for
damage
Refer to owners handbook for per
-
missible load details
Check as described under 'slipping
clutch'
Excessive
lining wear
lperating mechan-
sm faulty
:Iutch unit faults
3rabbing clutch
harsh engagement
'rom standing start,
Iften followed by clutch
udder) Check
operating mechanism for
wear and binding which usually
indicates
a binding withdrawal
race thrust bearing
Check pedal for sticking parts in
-
cluding return spring
Check for oil on friction driven
plate
Checkclutch plate and flywheel for
wear. Check flywheel
runout. Check also for glazing on driven
plate linings
Check for driven plate hub splines
sticking on pinion shaft.
Check pinion shaft for wear.
Check for broken or weak pressure
springs.
Check torque damper springs in
clutch driven
plate
hgine mounting Check
for damaged or deteriorated
engine mountings.
Check fixings for tightness
Remedy
Renew driven plate
Renew as necessary
Always support trans
- mission weight during fitting
Renew driven plate
Fit replacement clutch as-
sembly
Fit replacement clutch as- sembly
Free
off bearing. Renew as
necessary
Free
off pedal and check for
damaged and distorted
parts.
Renew
if necessary
Clean
off cover.
Renew faces.
Rectify oil
leak
Reclaim or renew as appli-
cable
Free driven plate, and check
for wear and distortion
Renew
if necessary
Renew
if necessary
Issue 1 August 1994 12 X300 VSM

Automatic Transmission (AJ16)
Both types of automatic transmission comprise a hydrodynamic torque converter driving an epicyclic gear train which
provides four forward ratios and reverse. Gearshift selection is made by a hydraulic (or electronichydraulic) trans- mission control unit. Six gearshift positions are provided:
Position
'P' (Park) -the driven wheels are mechanically locked at the transmission.
Position
'R' (Reverse) - reverse gear selected.
Position
'N' (Neutral) - engine disconnected from drive-line and wheels.
Position 'D' (Drive)
- all four speed ranges are selected automatically with lock-up available in top gear only.
Position
'3' - automatic selection of the lowest three speed ranges only.
Position '2'
- automatic selection of the lowest two speed ranges only; the transmission is prevented from shift- ing up to the third and top speed ranges.
Immediate selection of a lower ratio is also available, within mapped limits, by 'kick
-down' (pressing the accelerator
pedal down beyond the normal full throttle position) for example when overtaking.
A brake pedal/gearshift interlock is incorporated in the shift lever mechanism. Theshift lever may only be movedfrom
the 'P' (Park) position if the ignition key switch is in position 'll', and the foot brake is applied. The ignition key cannot
be removed from the ignition switch unless the shift lever is in the 'P' (Park) position. Once the ignition key has been
removed, the shift lever is locked in the Park position. The gearshift interlock may be over-ridden manually in the event
of an electrical failure or when it is required to move the vehicle manually for access, ie for removal of the propeller
shaft.
8.1.1.1
Gearshift selection causes the appropriate gear to be selected through a cable operated shift lever on the side of the
Gear Selection (ZF 4HP 22)
transmission unit. When a gea; is selected, the shift points are determined by accelerator pedal position through a
throttle cable connection and by pressures equivalent to road speed derived from a centrifugal governor on the output
shaft.
Gearshift speed and quality are controlled by the hydraulic control unit located in the lower part of the transmission
housing. The control unit contains selector valve, control pistons and pressure valves.
The hydraulic control unit can be overridden by 'kickdown'. This is actuated by the final travel of the accelerator pedal
and causes the next lower gear to be selected.
8.1.1.2
Gearshift selection causes the appropriate gear to be selected through a cable operated shift lever on the side of the
transmission unit; the shift lever also operates a rotary switch attached to the side of the transmission unit. When a
gear is selected, the rotary switch provides an output or combination of outputs to the TCM, which continuously moni
- tors the gear selected in addition to output shaft speed and transmission oil temperature. Information from the Engine
Control Module (ECM) representing engine speed, load and throttle position is also fed to the TCM to enable the most
suitable gear to be selected.
Gear selection and gearshift speeds are controlled by the manually operated selector valve, a solenoid operated pres
- sure regulator and three solenoid valves. On receipt of signalsfrom the TCM, the three solenoid valves MVI, MV2 and
MV3, in various combinations with the safety valve, determine the appropriate gear range. The TCM, on receipt of
information of engine state and road speed, determines the shift speed.
The Performance Mode switch, located on the shift lever surround, provides two alternative shift speed patterns:
1. 'Normal (Economy) Mode' - designed for everyday use.
2. 'Sport Mode'
- gear shift takes place at higher road speeds to enhance performance.
The 'kick
-down' switch, located beneath the accelerator pedal, is actuated by the final travel of the pedal and signals
to the TCM that the next lower gear is to be selected.
Gear Selection (ZF 4 HP 24 E)
X300 VSM 3 Issue 1 August 1994

Powertrain Automatic Transmission (V12 & AJ16 Supercharged)
Light throttle D1 -D2 D2 - D3 D3 - D4
Normal mile 1 h 8- 10 18-20 25 - 39
kmlh 13- 15 28 - 33 40 - 46
sport mile 1 h 10 - 12 20 - 23 30 - 34
kmlh 16- 19 32 - 37 48-55
Up to Detent D1- D2 D2 - D3
Normal mile I h 34 - 37 60-66
kmlh 54 - 59 97 - 107
8.2.1.2 Shift Speeds
0
D4 - TCC on
45 - 51
72
-83
47
- 55
76
-88
D3
- D4
86
-94
138
- 151
4,O Liter Supercharged
sport mile I h 43 - 47 74 - 81 103 - 113
kmlh 69 - 76
118- 130
166 - 182
Maximum shift speeds (through detent)
Normal 1 Sport mile I h
kmlh
D1 -D2 D2 - D3 D3 - TCC on
47 - 50 81 -84
116 - 128
75
- 80 130 - 134
187 - 205
TCC
-Torque converter clutch
m: Road speeds shown above are for a vehicle with an axle ratio of 3,58:1, and standard tyres (2251 65ZR15). For
a vehicle with optional sports tyres
(225 / 55ZR16) (lattice wheels), these speeds must be reduced by 2,4%.
Zero throttle 1 TCCoffinD4 1 D4 - D3 D3 - D2
X300 VSM 3 Issue 1 August 1994
D2 - D1
Normal mile 1 h
kmth
sport mile 1 h
kmlh
I 36 - 40 15- 17
10- 12 -
58-64 24 - 27 16- 19 -
36 - 40 18 - 20 12 - 14
9-9
58-64 29 - 32 20 - 22 14 - 15
Up to
detent D4 - D3 03 - D2
Normal mile 1 h 67-74 3-44
kmlh 107-118 63-70
sport mile 1 h 81 -89 57 - 63
kmlh 130- 144 92 - 101
Kick-down available (through detent) TCC4 - D3 D3 - 02
Normal 1 Sport mile I h 103- 113 67 -74
kmlh 165 - 183 107 - 118 D2
- D1
9-9
14
- 15
27
- 29
43 - 47
D2
- D1
36 - 40
58-64

Automatic Transmission (V12 & AJ16 Supercharged)
Light throttle D1 -D2
Normal mile 1 h -
km/h -
sport mile / h 10- 12
kmlh 16- 18
Up to detent
Normal mile I h
kmlh
sport mile
1 h
km/h
Maximum shift speeds (through detent)
Normal I Sport mile / h
kmlh
6,O Liier
D2 - D3
D3 - D4
D4 - TCC on
20 - 23 29 - 33
48 - 55
32
- 37 46 - 52
77 -88
23 - 26 32 - 37 51 -59
36
- 41 51 -59 82 - 94
D1 -D2
D2 - D3 D3 - D4
35
- 40 61 -70 83-91
56
- 64 98- 112 133 - 164
43 - 49 73 - 79 99 -107
68
-78 117 - 127 158 - 172
D1 -D2 D2 - D3
D3 - TCC on
48-53 81 -89
116- 124
77
- 85 130- 149
186 - 198
Zero throttle
Normal mile 1 h
kmlh
sport mile
1 h
km/h
TCC off in 04 D4 - D3 D3 - D2 D2 - D1
- 36 - 40 15 - 17 10 - 12
16
- 19 58 - 64 24 - 27
36
- 40 18 - 20 12-14 6-7
58
- 64 29 - 32 19 - 22 10- 12
-
0
0
Up to detent
Normal mile I h
kmlh
sport mile
/ h
km/h
mile I h
kmlh
'Kick-down' available (through detent)
Normal 1 Sport
TCC -Torque converter clutch
m: Road speeds shown above are for a vehicle with an axle ratio of 3,58:1, and standard tyres (2251 65ZR15). For
a vehicle with optional sports tyres
(225 155ZR16) (lattice wheels), these speeds must be reduced by 2,4%.
D4 - D3 D3 - D2 D2 - D1
67 - 75 37 - 41 7-9
108
- 119 59 - 66 11 - 14
84
-92 60 - 66
27 - 29
134
- 148 96 - 106
43 - 47
TCC4
- D3 03 - D2 D2 - D1
103 - 113 67 -75 36 - 40
164
- 181 108 - 119 58 - 64
0
0
Issue 1 August 1994 4 X300 VSM

-5 Driveshafts & Final Drive
0
Fixing
11. TORQUE TIGHTENING SPECIFICATIONS
Tightening Torque
(Nm)
'A' frame to differential 85 - 115
'A' frame to wide mountina bracket 72 - 98
ABS sensor to hub carrier
Axle shaft hub nut
* See repair operations 47.10.01 and 64.15.14 & 15 this don
8- 10
304 - 336 *
Axle shaft to output flange
Bush,
'A' frame lower mounting to body
81 -99
80
- 100
Centre drive shaft bearing to crossmember 19 - 27
Crossmember to bodv 19 - 27
Differential nose to wide mounting bracket - 34 - 46
Issue 1 August 1994 iv X300 VSM
Differential strut to bodv 85 - 95
Drive shaft to auto-gearbox flange
Drive shaft flexible coupling to pinion flange 33 - 45
71
-83
Exhaust joint 'Olive'
Exhaust joint 'Torca clamp' -. 14-18
60
- 80
Exhaust mounting to wide mounting bracket
Final drive unit to wide mounting bracket at differential 'nose'
Hub carrier fulcrum 22-88
34
- 46
80
- 100 ___
Lower shock absorber bolt
Mounting bracket
('A' frame) to body (inner)
Mountina bracket
('A' frame) to bodv (outer)
- 80- 100
40 - 50
80 - 100
Oil drain plug __ 26 - 34
Oil filler DIU~ 20 - 26
Output shaft housing to differential case
Pendulum assembly to differential
Pinion drive flange nut
* See repair operation 5120.01 this section
Road wheel -Alloy
Road wheel - Steel
Upper link to differential
Rear
mounting bracket to differential
52 - 58
160
- 200
Minimum 135 *
85 - 105
88 - 102
68
-82
72
- 98 ~~~~~
Upper
link to wide mounting bracket & 'A' frame
Wide mounting bracket to
'A' frame
85-115
85
-115
Wishbone pivot nut
Wishbone tie to differential stud 80 - 100
85 - 105

Driveshafts & Final Drive
9.3
SRO 51.10.24
Disconnect vehicle battery ground lead.
. Support the vehicle at the rear.
OUTPUT SHAFT END FLOAT, CHECK
Mount a dial test indicator (DTI) to the differential housing with the probe resting on the output shaft flange (DTI probe must be parallel to the output shaft center line and NOT at an angle).
. Push the wheel 1 shaft assembly inwards and zero the DTI; pull outwards and note the reading.
. If the end float exceeds 0,15 mm; firstly verify the shim preload and if this is found to be correct, renew the output
shaft bearing. See 51.10.22. this section, for shim check and renew operations.
9.4
SRO 51.20.19
rn Disconnect vehicle battery ground lead.
See operation 51.10.22. this section, for process detail, less bearing 1 oil seal renew.
OUTPUT SHAFT HOUSING ‘0’ RING, RENEW
Prior to removal of shaft assembly check output shaft end float in accordance with operation 51.10.24.
9.5 OIL SEAL - PINION FLANGE, RENEW
SRO 51.20.01
. Disconnect vehicle battery ground lead.
. Support the vehicle at the rear.
. Disconnect main handbrake cable at compensator.
’Match mark‘ the FLEXIBLE COUPLING to the differential DRIVE FLANGE and remove fixings.
Remove fixings center bearing to crossmember and push drive shaft rear section forward to disengage from pinion
spigot.
CAUTION: Under no circumstances must the flexible coupling (or its fixings) be loosened or removed from the drive
shaft flange.
Support the drive shaft, do not allow it to hang.
9 ‘Match mark‘ the drive flange retaining nut to both the pinion and the drive flange (Fig. 1).
. Slacken the flange retaining nut approximately half a turn and retighten to the ‘match mark‘ noting the required force.
. Remove the retaining nut, washer and drive flange.
CAUTION: Use only special tools; 18G 1205 to restrict rotation and JD 156 to remove drive flange.
. Inspect the drive flange oil seal surface for damage corrosion or grooving and replace as necessary.
. Remove oil seal from differential case taking care not to damage the machined counterbore.
rn Clean seal counterbore.
. Using special tool JD 198 fit replacement oil seal to differential case ensuring that, seal is square, fully seated and
If the force does NOT exceed 135 Nm, the final drive unit MUST be replaced.
Do not use abrasive cloth, or paper, to remove imperfections from the seal surface.
the
lip spring is not dislodged.
Apply grease to drive flange seal diameter and refit the flange to the pinion in the original position.
U: Do not hammer the drive flange onto the pinion; pull down with the drive flange nut.
Tighten the drive flange nut to the original noted torque PLUS 10%.
* Check that the pinion spigot radial run-out is to specifica- tion.
Fitting and reassembly is the reversal of this procedure en
- suring that drive shaft fixings are renewed and that the
shaft is aligned in accordance with Sub-Section 9.2.
Correct the final drive oil level if required.
. Tighten all fixings to specification.
Fig. 1
0
Issue 1 August 1994 4 X300 VSM

Driveshafts & Final Drive
. Remove upper link assembly from differential and wide mounting bracket / 'A' frame.
. Release fixings, 'A' frame to differential, 'A' frame to wishbone tie and wide mounting bracket to 'A' frame.
. Remove wishbone tie assembly, rear mounting bracket and pendulum assembly.
. Release fixings differential nose to wide mounting bracket.
. Assembly and fitting is the reversal of this procedure, taking note of the following:
Drive shaft must be aligned in accordance with Sub
-Section 9.2.
Renew all self locking nuts.
Renew all bolts that were originally fitted with thread locking adhesive.
Replace all locking wire and split pins (cotter pins).
Tighten all fixings to the specified torque.
Correct the final drive oil level
if required.
Check and adjust rear wheel camber setting as required.
9.9 AXLE SHAFT ASSEMBLY, RENEW
SRO
47.10.01
Disconnect vehicle battery ground lead.
. Slacken appropriate axle shaft hub nut.
. Support the vehicle at the rear and remove rear road
. Remove brake caliper in accordance with 70.55.03. Sec-
wheel.
tion 12, but do not disconnect hydraulics.
Slacken hub carrier fulcrum and remove ABS sensor from
hub carrier.
. Remove axle shaft hub nut and collar.
. Remove fixings axle shaft to differential output shaft
flange, note camber shim.
. With service tools JD 1D/7 (Fig. 1) and JD ID (Fig. 21, push
shaft through hub.
. Remove axle shaft assembly.
CAUTION: Take care not to introduce debris into the hub
bearings, or damage seal.
. Prior to assembly, remove all traces of adhesive from hub
. Assembly and fitting is the reversal of this procedure
Adhesive should be applied to axle shaft splines over
a radial area of
30 to 50%.
Renew all bolts that were originally fitted with thread
locking adhesive.
Replace all locking wire and split pins (cotter pins).
Tighten all fixings to the specified torque.
Check and adjust rear wheel camber setting.
Verify operation of brakes.
Renew all self locking nuts.
splines.
taking
note of the following:
0
NQ&: The axle shaft nut is a self-locking item with a thread
insert and must NOT be reused.
Fig. 1
Fig.2
- Iss ue 1 August 1994
__~
7 X300 VSM

TORQUE TIGHTENING SPECIFICATIONS
Fixing Tightening Torque
(Nm)
Air bag to steering wheel
Blanking plug for rack centralizing pin 4-5
7
- 10
Fluid pipe to pump banjo bolt
Fluid
pipe to cooler sleeve nut X 2 34
- 46
17
- 23
Fluid pressure pipe pump to rack mid connector
Heatshield to rack
(12 cvlinder)
17 - 23
22
- 28
Horn bar (at steering wheel)
Hose from
fluid reservoir (worm drive)
Hose
to pump (worm drive)
Hose to fluid reservoir from cooler (worm drive)
Lower column to steerina rack pinion
5-7
2,5
- 3,5
Retighten to nominal
after 30 minutes
Retighten to nominal
after
30 minutes
Retighten to nominal
after
30 minutes
2,5 - 3,5
2,5
- 3,5
22
- 28
Pressure switch to feed pipe 12 cylinder only 8,5 - 11,5
Road wheel -Alloy 88- 102
Road wheel - Steel 68-82
Steering column outer tube to bodv 17 - 23
Steering column universal joint to lower column
Steering column upper bracket to column outer tube
Steering column upper bracket to plenum stiffener 17 - 23
16
-20
17
-23 ~~
I Steering
column upper COWIS I ~ 2.5-3.5
Steering
rack to crossmember 12 cylinder
Steering rack to crossmember
6 cvlinder
39 - 51
43
- 57
Steering wheel to column 34 - 46
Tie strap plenum 16-20
Track rod end taper ball pin to steering arm
Track rod end lock nut 59-71
51
-69
17
- 23 Tube nut -fluid pipe at steering rack 2 off
X300 VSM iii Issue 1 August 1994