brake JAGUAR XJ6 1994 2.G User Guide

Manual Transmission & clutch (AJ16)
7.1.15 CLUTCH MASTER CYLINDER, RENEW
SRO 33.20.01
. Remove the clutch master cylinder to clutch pedal clevis
pin securing clip (1 Fig. I), and remove the clevis pin (2
Fig. 1).
. Remove the master cylinder securing nuts (3 Fig. 1).
. Disconm.the hydraulic pipe (4 Fig. 1) from the master
cylinder, and fit blanking plugs to the pipe and master cy- linder.
. Remove the master cylinder assembly (5 Fig. 1) and the
gasket (6 Fig. 1).
. Fit the new master cylinder to the bench vice and fill the
reservoir.
. Refit the reservoir cap.
. Remove the blanking plug from the master cylinder.
. Prime the master cylinder by 'working' the push rod until
fluid appears at the hydraulic pipe outlet.
. Remove the master cylinder from the vice.
. Place a new gasket (6 Fig. 1) over the mounting studs.
. Fit and align the master cylinder assembly to the studs,
. Remove the blanking plug from the hydraulic pipe (4 Fig.
. Ensure that the union is clean and no foreign matter enters
and secure
with the nuts
(3 Fig. 1).
1 ).
the system.
WARNING: USE ONLY CLEAN BRAKE FLUID OR DENA- TURED ALCOHOL (METHYLATED SPIRITS) FOR
CLEANING. ALL TRACES OF CLEANING FLUID
ALL COMPONENTS MUST BE LUBRICATED
WITH CLEAN BRAKE FLUID AND ASSEMBLED
USING THE FINGERS ONLY.
MUST
BE REMOVED BEFORE RE
-ASSEMBLY.
. Reconnect the pipe (4 Fig. 1) to the master cylinder (5 Fig. I), and tighten the union nut.
. Align the push rod to the pedal.
. Clean and grease the clevis pin (2 Fig. 1).
Align andfit the clevis pin to the pedal and push rod.
. Fit the securing clip (1 Fig. 1).
. Bleed the clutch hydraulic system, see Sub-Section
7.1.18.
-4
1
J33 072 2
Fig. 3
issue 1 August 1994 16 X300 VSM

Manual Transmission & Clutch (AJ16)
e
7.1.16 CLUTCH SLAVE CYLINDER, RENEW
SRO 33.35.01
. Disconnect the pipe from the clutch slave cylinder, plug or
tape the pipe to prevent the ingress of any dirt.
. Remove the nuts (1 Fig. 1) and spring washers securing
the slave cylinder to the transmission.
. Remove the hose clip bracket (4 Fig. 1) complete with the
hydraulic hose/ pipe (5 Fig. I), and slide the slave cylinder (2 Fig. 1) off the mounting studs.
. Slide the rubber boot along the push rod (3 Fig. 1) and
withdraw the push rod from the cylinder.
. To refit the new clutch slave cylinder, reverse the removal
operations.
. Bleed the clutch hydraulic system, see Subsection
7.1.18.
Fig. 1
7.1.17 CLUTCH SLAVECYLINDER, OVERHAUL
SRO 33.35.07
. Remove the clutch slave cylinder, see Sub-Section 7.1.16.
. Dismantle the cylinder. The new parts in the kit will indicate which used parts should be discarded.
. Clean the remaining parts and the cylinder thoroughly with unused brake fluid of the recommended type and place
the cleaned parts on to a clean sheet of paper.
WARNING: USE ONLY CLEAN BRAKE FLUID OR DENATURED ALCOHOL (METHYLATED SPIRITS) FOR CLEANING.
ALL TRACES OF CLEANING FLUID MUST BE REMOVED BEFORE RE-ASSEMBLY. ALL COMPONENTS
MUST BE LUBRICATED WITH CLEAN BRAKE FLUID AND ASSEMBLED USING THE FINGERS ONLY.
. Examine the cylinder bore and the pistons for signs of cor- rosion, ridges or score marks. Provided the working sur- faces are in perfect condition, new seals from the kit can
be fitted, but if there is any doubt as to the condition of the
parts then a new cylinder must be fitted.
. Fit the new seal (1 Fig. 2) to the piston (2 Fig. 2) with the flat
back of the seal against the shoulder.
Lubricate theseal and thecylinder bore with unused brake
fluid of the recommended type and assemble thecylinder.
. Before fitting the dust cover (3 Fig. 21, smear the sealing
areas with rubber grease.
Squeeze the remainder of the grease from the sachet into
the cover to help protect the internal parts.
. Refit the clutch slave cylinder, see Sub-Section 33.15.01.
Bleed the clutch hydraulic system, see Sub-Section 7.1.18.
U 111 "I, II
Fig. 2
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X300 VSM 17 Issue 1 August 1994

Manual Transmission & Clutch (AJ16)
7.1.18 CLUTCH HYDRAULICSYSTEM, BLEED
SRO 33.15.01
CAUTION: Only use minimum DOT 4 brake fluid in the hy- draulic system.
. Remove the reservoir filler cap, and top up to the correct
level with hydraulic fluid.
. Attach one end of a bleed tube (1 Fig. 1) to the slave cylin- der bleed nipple (2 Fig. 1).
. Partiallyfill a clean container (3 Fig. 1) with hydraulicfluid.
. Immerse the other end of the bleed tube in the fluid.
. Slacken the slave cylinder bleed nipple.
. Pump the clutch pedal slowly up and down, pausing be-
. Top up the reservoir with fresh hydraulic fluid after every
tween
each stroke.
three pedal strokes.
CAUTION: Do not use fluid bled from the system for top- ping up purposes as this will contain air. If the fluid has been in use for some time it should be discarded. Fresh fluid bled from the system
may be used after it has stood for a few hours
allowing
all the air bubbles to disperse.
Pump the clutch pedal until the pedal becomes firm,
a Top up the reservoir, refit the filler cap.
tighten
the bleed nipple.
. Apply working pressure to the clutch pedal for two to three
minutes and examine the system for leaks.
X300 VSM Issue 1 August 1994 18
Fig. 1

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

bZF Automatic Transmission (AJ16) -
0
8.1.2 TRANSMISSION FLUID, RENEW
SRO 44.24.02
= Raise the hood and fit a fender cover.
. Raise the vehicle on a ramp.
. Place a drain tin in position beneath the transmission drain
Release and remove the transmission drain plug; allow
. Fit the drain plug with a new washer and torque tighten.
Reposition the drain tin beneath the dipstick tube union.
Remove the screw securing the dipstick tube bracket.
. Release the dipstick tube union nut and disconnect the
tube from the fluid pan.
. Drain the transmission fluid.
Clean the tube unions, reconnect the dipstick tube to the
. Lower the vehicle on the ramp.
. Remove the transmission dipstick.
. Renew the transmission fluid filter, see Subsection 8.1.6.
Fill the transmission with the correct fluid, see the ZF Auto-
Note: It will not be possible to get all the initial fill quantity
of fluid into the transmission.
. Refit the dipstick.
. Startthe engine, apply all brakes and run the transmission
With the engine still running, remove the dipstick.
Clean the dipstick and refit.
Remove the dipstick and check the transmission fluid
. Add fluid until the correct level is achieved.
. Stop the engine and refit the dipstick.
. Checkfluidleveltothe'HOT'marksaftera20mileroad run
(3,2L AND 4,OL)
Plug.
the fluid to drain.
fluid pan and torque tighten the union nut.
0
matic Transmissions Service Manual, General Data.
through
all gear positions and select 'Park'.
level. Remove the fender cover and lower the hood.
to ensure accurate results.
m
e
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X300 VSM Issue 1 August 1994 6

Automatic Transmission (AJ16)
8.1.5 TRANSMISSION ROTARY SWITCH, RENEW
0 (4,OL)
SRO 44.15.36
. Check the shift cable adjustment.
. Switch the ignition ON, apply the footbrake and move the
Switch the ignition OFF and disconnect the battery.
. Open the armrest lid.
. Release and remove the ashtray securing screws.
. Displace the ashtray assembly for access.
. Disconnect the cigar lighter / illumination harness con-
. Place the ashtray assembly aside.
. Displace and remove the console veneer panel rear fin-
isher.
Carefully displace the Performance Mode switch from the
gear surround finisher.
. Disconnect the Performance Mode switch from the har-
ness multi-pin plug.
Displace and remove the Performance Mode switch sur-
round finisher.
Displace and remove the shift lever surround finisher.
. Release and remove the veneer panel wing nuts.
= Displace and remove the console finisher veneer panel.
Cut and remove the rotary switch harness securing straps.
= Disconnect the rotary switch harness multi-pin plugs.
. Reposition the tunnel carpet for access to the harness
Displace and reposition the grommet down through the
. Feed the harness through the tunnel to the underside of
. Raise the vehicle on a ramp.
. From beneath the vehicle, release and remove the rotary
switch harness to transmission
'F" clip securing nut; dis-
place and reposition the 'P' clip from the stud.
Release and remove the rotary switch harness to trans-
mission 'P' clip securing screw.
Release and remove the rotary switch protection cover
(1 Fig.1) securing bolts; displace and remove the switch
cover.
shift
lever to
'N'.
n ect o rs .
@
grommet.
tunnel.
the vehicle.
Disconnect the transmission multi-pin socket (2 Fig.1).
. Reposition the harness clear of the transmission unit.
. Release and remove the rotary switch securing nuts.
. Displace and remove the switch assembly.
. Displace and remove the 'P' clips from the harness.
. Fit and align the 'P' clips to the new harness / switch as-
. Displace the rubber sealing plug (3 Fig.1) from the rotary
sembly.
switch.
i3 2 JLL-690
Fig.
1
X300 VSM 9 Issue 1 August 1994

Automatic Transmission (V12 & AJl6 Supercharged) Pomrtrain
8.2.1 GENERAL DESCRIPTION
This section provides information relating to the Powertrain 4L80-E transmissions fitted to the 4,O liter supercharged
engine (4,OL SC) and to the 6,O liter engine (6,OL).
The Powertrain 4L80-E is a four-speed, high torque capacity, electronically controlled automatic transmission, which
comprises a torque converter with lock-up direct drive clutch and three planetary gear sets. Five multiple diskclutches,
one intermediate sprag clutch assembly, two roller clutch assemblies and two band assemblies provide the drive el- ements necessary for correct sequential gear engagement and operation.
The torque converter containing
a pump, a turbine (rotor), a stator assembly, and a clutch pressure disksplined to the
turbine, acts as a fluid coupling for smooth torque transmission from the engine. The converter also supplies addi- tional torque multiplication when necessary, and the torque converter clutch (TCC) pressure disk provides a mechan- ical direct drive or 'lock-up' above a certain speed in top gear for greater fuel economy.
Gearshift operations are controlled from the Transmission Control Module (TCM), which governs the electronically
controlled valve body situated within the transmission.
Three planetary gear sets provide reverse and the four forward ratios, the changing of which is fully automatic in rela
- tion to load, vehicle speed and throttle opening. The Transmission Control Module receives and integrates various ve- hicle sensor input signals, and transmits operating signals to the solenoids located in the control valve assembly.
These solenoids govern the transmission operating pressures, up-shift and down-shift gear selection patterns and
also the torque converter clutch operation by pulse width modulated control.
8.2.1.1 Gear Ranges
Selectable gear positions are: P - Park, R - Reverse, N - Neutral, D - Drive, 3, 2.
P - Park position of the shift lever provides a mechanical locking of the output shaft of the transmission, and as such,
must only be engaged when the the vehicle is stationary. In addition, and for
extra safety, the handbrake should also
be applied. It is necessary to have the ignition ON and the footbrake applied to move the shift lever from the Park
position. For ignition key removal the shift lever must be in the Park position. The engine can be started in the Park
position.
R - Reverse enables the vehicle to be operated in a rearwards direction. The engine cannot be started in the Reverse
position.
N
-Neutral position enables the engine to be started and operated without driving the vehicle. It also allows the vehicle
to be moved manually for access, ie for removal of the propeller shaft.
D
-Drive position allows the automatic selection of all four forward gear ratios during normal driving conditions for
maximum efficiency and fuel economy. On acceleration, down-shifts are obtained by depressing the accelerator pedal
or by manual selection. The engine cannot be started in this position.
3
- Manual third position allows automatic operation of the three lower gear ratios but inhibits selection of the fourth
ratio. This position is used for towing a trailer or negotiating hilly terrain when greater engine braking control is re- quired. The engine cannot be started in this position.
2 - Manual second position allows automatic operation of the two lower gear ratios but inhibits selection of the third
and fourth ratios. This position is used for heavy traffic congestion or negotiating hilly terrain when even greater en
- gine braking control is required than is provided by manual third. This ratio may be selected at any vehicle speed - even if the transmission is in third or fourth ratio, the transmission will immediately down-shift to second gear pro- vided the vehicle speed is below 137 km / h (85 mile / h). The engine cannot be started in this position.
N.g!b: With the Performance Mode switch in the NORMAL position, the vehicle will pull away in second gear. How- ever, if more than 75 per cent of throttle is applied when the vehicle speed is between zero and 13 km/ h (8 mile / h), then first gear will be selected. From 13 to 61 km/ h (8 to 38 mile/ h) first gear is obtainable by 'kick-down'.
In 'sport' mode thevehicle pulls away in first gear and the transmission operatesfully in all four forward gears.
X300 VSM 1 Issue 1 August 1994

Automatic Transmission (V12 & AJ16 Supercharged) Powertrain
0
8.2.13 LUBRICATION SYSTEM, DRAIN AND REFILL
(4,OL SC AND 6,OL)
SRO 44.24.02
. Raise the vehicle on a ramp.
. Position a drain tin below the transmission unit.
. Release and remove the fluid pan drain plug.
. Allow the fluid to drain.
Clean the drain plug, including the magnet and the fluid
pan drain plug face.
. Fit and tighten the fluid pan drain plug.
. Remove the drain tin from below the transmission unit.
. Lower the vehicle on the ramp.
Open the hood and fit
a suitable fender cover.
Remove and wipe the dipstick.
. Fit a funnel to the dipstick tube.
. Initially fill the transmission with 4,5 liters of fluid.
. Remove the funnel.
. Open the front door.
. Check that the parking brake is applied.
. Start the engine.
Apply the footbrake.
Run the shift lever through all positions, finally returning
to the Park position.
. Release the footbrake.
. Insert the dipstick, then remove and inspect the level.
. Fit the funnel to the dipstick tube.
. Fill the transmission to the 'COLD' level mark on the dip-
stick with the correct fluid, see the Powertrain Automatic
Transmissions Service Manual, General Data.
CAUTION: On no account should the vehicle be driven un- less the fluid level is at the 'COLD' level and the
system primed.
0
Remove the funnel.
. Replace the dipstick.
. Switch the ignition OFF.
. Remove the fender cover and close the hood.
= Close the door.
J&&Q: 0 After road testing the vehicle, the fluid level on the
dipstick should be between the 'HOT' Min I Max
marks. Check the level with the transmission at nor-
mal operating temperature (90 to 100°C), with the
engine left running and the transmission in the Park
position.
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Issue 1 August 1994 14 X300 VSM ~
__

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
9.8 FINAL DRWE UNIT RENEW
SRO 51.25.13
. Disconnect vehicle battery ground lead.
. Support the vehicle at the rear and remove the rear road
wheels.
Disconnect brake pad wear sensor multi-plug at RH hub
carrier and remove tie straps from wishbone. Release
ABS speed sensors at
RH and LH hub carriers and remove
tie straps from wishbones.
. Remove rear brake calipers, see Section 12, and support
at bump stop. Disconnect main handbrake cable at com- pensator, short cables at joining piece and remove com- pensator.
. Remove fixings, FLEXIBLE coupling to differential DRIVE FLANGE.
CAUTIW: Under no circumstances must the flexible
coupling (or itsfixings) be loosened or removed
from the drive shaft flange.
. Remove fixings center bearing to crossmember (1 Fig. 1) and push drive shaft rear section forward to disengage
from pinion spigot. Fig. 1
w: Take account of any shims located between the center bearing and the crossmember.
. Release fixings and remove, over axle exhaust pipe mounting from wide mounting bracket.
. Support the rear suspension assembly from below and remove fixings from RH and LH sides in the following order:
1. Shock absorber to body upper fixings.
2. Differential strut to body (1 Fig. 2).
3. 'A' frame bush (2 Fig. 2).
4. Lower mounting bracket assembly to body (3 Fig. 2).
. Carefully lower the unit clear of the vehicle and place in a safe working location.
. Release handbrake cable to wide mounting bracket clips.
. Disconnect RH and LH axle shafts from differential couplings, note camber shim and discard fixings.
. Remove wishbone pivot bolt, washers and remove wisbone / hub / axle shaft assembly RH and LH.
issue 1 August 1994 6 X300 VSM