automatic transmission JAGUAR XJ6 1994 2.G Owner's Guide

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
1.
2.
3.
4.
5. 6.
7.
8.
9. 10.
11.
12.
13.
Torque converter
Turbine shaft
Pressure disk
Converter turbine
Converter stator
Variable force motor
solenoid
Fluid pan
Filter
Interior detent lever
Manual shaft
Control valve
Front band
Parking lock actuator
3 4667 i JU-134
14.
15.
16.
17.
18.
19.
20. 21.
22.
23.
24. 25.
Rear band
Sun gear shaft
Sun gear
Parking lock pawl
Transmission case
Output shaft
Rear extension housing
Rear internal gear
Output planetary carrier
assembly Reaction planetary
carrier assembly
'LO' roller clutch
Main shaft
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
Intermediate clutch Intermediate sprag clutch
Direct clutch
Forward clutch
Overdrive planetary carrier
assembly
Overdrive roller clutch
Overrun clutch
Fourth clutch
Pump assembly
Converter pump
Stator roller clutch
Output speed sensor
Fig.1 Powertrain 4L8O-E automatic transmission
0
0
0
Issue 1 August 1994 2 X300 VSM

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

Automatic Transmission (V12 & AJ16 Supercharged) Pomrtrain
8.2.2 TRANSMISSION INTERNAL HARNESS, RENEW
SRO 44.15.35
. Open the hood and fit a suitable fender cover.
. Raise the vehicle on a ramp,
. Drain the transmission lubrication system, see Sub-sec-
. Remove the fluid pan, see Subsection 8.2.14 (4,OL SC) or
U: Note the internal harness cable runs for assembly
purposes and remove the transmission internal har- ness multi-pin socket (1 Fig. I), discarding the '0' ring seal (2 Fig. 1); see Sub-section 8.2.19.
. Disconnect the internal harness plug from the 'A' Shift
. Disconnect the internal harness plug from the 'B' Shift
. Disconnect the internal harness plug from the pressure
. Disconnect the internal harness plug from the pulse width
. Disconnect the internal harness plug from the variable
force motor.
. Displace the internal harness from the retaining clips.
Remove the internal harness from the transmission unit.
. Place the harness aside.
. Clean all relevant parts.
. Fit the new internal harness to the transmission unit.
. Secure the internal harness to its retaining clips.
. Connect the internal harness plug to the variable force
. Connect the internal harness plug to the pulse width
. Connect the internal harness plug to the pressure switch
. Connect the internal harness plug to the 'B' Shift solenoid.
. Connect the internal harness plug to the 'A' Shift solenoid.
Fit a new internal harness multi-pin socket '0 ring, refit
the multi-pin socket to the main case and connect the ex- ternal harness, see Subsection 8.2.19.
. Refit the fluid pan, see Subsection 8.2.14 (4,OL SC) or
Sub-section 8.2.15 (6,OL).
. Lower the vehicle on the ramp.
. Refill the transmission unit with fluid, see Subsection 8.2.13.
Remove the fender cover and close the hood.
(4, OL SC AND 6,OL) e
tion 8.2.13.
Sub-section 8.2.15 (6,OL).
solenoid.
solenoid.
switch manifold.
modulator (TCC solenoid).
motor.
modulator.
manifold.
@
2
Fig 1
Issue 1 August 1994 X300 VSM 5

Automatic Transmission (V12 & AJ16 Supercharged) Powertrain
8.2.3
SRO 44.15.39
. Open the hood and fit a suitable fender cover.
9 Raise the vehicle on a ramp.
. Drain the transmission lubrication system, see Subsec-
. Remove the fluid pan, see Sub-section 8.2.14 (4,OL SC) or
. Remove the fluid filter, see Sub-section 8.2.18.
Disconnect the internal harness plug from the pressure
Release and remove the pressure switch manifold to valve
. Remove the manifold from the valve body.
. Retrieve the manifold to valve body '0' ring seals (Fig.1)
Clean the valve body manifold seating area.
. Fit new '0' ring seals to the grooves in a new pressure
Fit the manifold to the valve body.
. Fit and tighten the manifold to valve body securing bolts.
Connect the internal harness plug to the pressure switch
Refit the fluid filter, see Sub-section 8.2.18.
Refit the fluid pan, see Sub-section 8.2.14 (4,OL SC) or
. Lower the vehicle on the ramp.
. Refill the transmission unit with fluid, see Sub-section
. Remove the fender cover and close the hood.
PRESSURE SWITCH MANIFOL D, RENEW
(4,OL SC AND 6,OL)
tion 8.2.13.
Sub
-section 8.2.15 (6,OL).
switch manifold.
body securing bolts.
and discard.
switch manifold.
manifold.
Sub
-section 8.2.15 (6,OL).
8.2.13. Fig.
1
Issue 1 August 1994 6 X300 VSM

Powertraln Automatic Transmission (V12 & AJ16 Supercharged)
8.2.4 INPUT SPEED SENSOR, RENEW (4,OL SC)
SRO 44.15.40
. Raise
the vehicle on a ramp.
Reposition the edge of the transmission tunnel sound in- sulation foam for access.
. Disconnect the harness plug from the input speed sensor.
Release and remove the speed sensor securing bolt.
. Reposition the speed sensor protection cover for access;
. Remove the speed sensor from the transmission unit and
. Clean the main case speed sensor area.
. Fit a new '0' ring seal to a new input speed sensor.
9 Lubricate the '0' ring seal.
. Fit and seat the speed sensor to the main case.
. Reposition and align the speed sensor protection cover.
. Fit and tighten the speed sensor securing bolt.
Connect the harness plug to the speed sensor.
Reposition the edge of the transmission tunnel sound in-
. Lower the vehicle on the ramp.
the
cover remains captive on the harness.
place aside. @ sulation foam to the original position.
8.2.5
SRO 44.15.41
. Raise the vehicle on a ramp.
. Reposition the edge of the transmission tunnel sound in- sulation foam for access.
. Disconnect the harness plug from the output speed sen-
sor.
. Release and remove the speed sensor securing bolt.
. Reposition the speed sensor protection cover for access,
noting that the cover remains captive on the harness.
. Remove the speed sensor from the transmission unit and
place aside.
. Clean the main case speed sensor area.
. Fit a new '0 ring seal to a new output speed sensor.
. Lubricate the '0 ring seal.
. Fit and seat the speed sensor to the main case.
. Reposition and align the speed sensor protection cover.
Fit and tighten the speed sensor securing bolt.
. Connect the harness plug to the speed sensor.
Reposition the edge of the transmission tunnel sound in-
. Lower the vehicle on the ramp.
OUTPUT SPEED SENSOR, RENEW (4,OL SC)
sulation foam to the original position.
X300 VSM 7 Issue 1 August 1994

Automatic Transmission (V12 & AJ16 Supercharged) Powertrain
8.2.6
SRO 44.15.40
. Open the hood and fit a suitable fender cover.
. Raise the vehicle on a ramp.
. Slacken the underfloor catalyst to downpipe clamps se-
. Displace and reposition the olive clamps on the pipes.
INPUT SPEED SENSOR, RENEW (6,OL)
curing bolts.
Slacken the underfloor catalyst
to intermediate silencer
clamps securing bolts.
9 Displace the underfloor catalyst assembly rearwards to
disconnect from the downpipes.
Displace and remove the olives from the downpipes.
Using a wire brush, clean the olives and downpipe joints.
. Place a suitable piece of wood between the underfloor
. Reposition the edge of the transmission tunnel insulation
. Release and remove the input speed sensor securing bolt.
. Reposition the speed sensor protection cover for access,
noting that the cover remains captive on the harness.
Disconnect the speed sensor harness multi
-pin plug.
- Displace and remove the speed sensor from the trans- mission case.
Clean the transmission case area.
. Fit a new ‘0 ring seal to a new input speed sensor.
. Lubricate the ‘0 ring seal.
. Fit and fully seat the speed sensor to the transmission
. Reconnect the harness multi-pin plug.
Reposition and align the protection cover.
. Fit and tighten the speed sensor securing bolt.
Reposition the insulation foam to its original position.
Remove the block of wood from between the underfloor
. Apply sealant to the downpipe joints and olives. See Ser-
Fit and seat the olives to the downpipes.
Reposition the olive clamps.
Tighten the underfloor catalyst to downpipe clamps secur-
Align the intermediate silencers to the underfloor catalyst
. Tighten the clamp securing bolts.
. Lower the vehicle on the ramp.
Remove the fender cover and close the hood.
catalyst
and the body for access.
foam for access.
0
case.
catalyst and the floor.
vice Materials
in the preliminary pages, this Section.
Reconnect the underfloor catalyst to the downpipes.
0
ing bolts.
assembly.
lppl
0
X300 VSM issue 1 August 1994 8

Powertwin Automatic Transmission (V12 & AJ16 Supercharged)
8.2.7
SRO 44.15.41
OUTPUT SPEED SENSOR, RENEW (6,OL)
. Open the hood and fit a suitable fender cover.
. Raise the vehicle on a ramp.
. Slacken the underfloor catalyst to downpipe clamps se-
Displace and reposition the olive clamps on the pipes.
. Slacken the underfloor catalyst to intermediate silencer
. Displace the underfloor catalyst assembly rearwards to
. Displace and remove the olives from the downpipes.
. Using a wire brush, clean the olives and downpipe joints.
Place a suitable piece of wood between the underfloor
catalyst and the body for access.
. Reposition the edge of the transmission tunnel insulation
foam for access.
. Release and remove the output speed sensor securing
bolt.
Reposition the speed sensor protection cover for access,
noting that the cover remains captive on the harness.
. Disconnect the speed sensor harness multi-pin plug.
. Displace and remove the speed sensor from the trans-
. Clean the transmission case sensor area.
. Fit a new '0' ring seal to a new output speed sensor.
. Lubricate the '0' ring seal.
Fit and fully seat the speed sensor to the transmission
. Reconnect the harness multi-pin plug.
Reposition and align the protection cover.
. Fit and tighten the speed sensor securing bolt.
Reposition the insulation foam to its original position.
Remove the block of wood from between the underfloor
catalyst and the floor.
. Apply sealant to the downpipe joints and olives. See Ser- vice Materials in the preliminary pages, this Section.
. Fit and seat the olives to the downpipes.
. Reconnect the underfloor catalyst to the downpipes.
= Reposition the olive clamps.
. Tighten the underfloor catalyst to downpipe clamps secur-
= Align the intermediate silencers to the underfloor catalyst
. Tighten the clamp securing bolts.
Lower the vehicle on the ramp.
. Remove the fender cover and close the hood.
curing
bolts.
cl amps securing bolts.
disconnect from the downpipes.
mission case.
case.
0
ing bolts.
assembly.
Issue 1 August 1994 X300 VSM 9

Automatic Transmission (V12 & AJ16 Supercharged) Powertrain
8.2.8 TEMPERATURE SENSOR, RENEW
(4,OL SC AND 6,011
The temperature sensor forms part of the internal wiring
harness. Should the sensor require replacement, a new wir- ing harness must be fitted. See Subsection 8.2.2.
8.2.9 VARIABLE FORCE MOTOR, RENEW
SRO 44.15.43
. Open the hood and fit a suitable fender cover.
. Raise the vehicle on a ramp.
. Drain the transmission lubrication system, see Sub-sec-
Remove the fluid pan, see Sub-section 8.2.14 (4,OL SC) or
Remove the fluid filter, see Subsection 8.2.18.
Disconnect the internal harness plug from the variable
Release and remove the motor retaining clamp to valve
. Remove the retaining clamp (2 Fig.1) and remove the
Fit a new variable force motor to the valve body.
CAUTIOI\I: Do not adjust the motor screw and ensure that
the motor filter is not damaged.
. Align the motor.
. Fit the motor to the valve body retaining clamp.
. Fit and tighten the motor retaining clamp securing screw.
Connect the internal harness
plug to the motor.
. Refit the fluid filter, see Sub-section 8.2.18.
. Refit the fluid pan, see Subsection 8.2.14 (4,OL SC) or
. Lower the vehicle on the ramp.
. Refill the transmission unit with fluid, see Subsection
(4,OL SC AND 6,011
tion 8.2.13.
Sub
-section 8.2.15 (6,OL).
force motor.
body securing screw (1
Fig.1).
motor (3 Fig.1) from the valve body and place aside.
Sub
-section 8.2.15 (6,OL).
8.2.13.
m Remove the fender cover and close the hood.
JU 596
Fig. 1
X300 VSM Issue 1 August 1994 10