1998 JAGUAR X308 sensor

5. Remove the output speed sensor.
• NOTE: M6 fixing. 1. Release the screw which secures the output speed sensor bracket and pull the sensor clear.
Disconnect harness multiplug.

6. Remove the selector cable abutment bracket fixings and
reposition the bracket for access to the multiplug.

7. Disconnect the transmission harness multiplug.
1. Release the harness locking lever.
2. Disconnect the harness multiplug.
8. Remove harness multiplug retaining clip.
Push the multiplug into the transmission casing to release.
Discard the two 'O' rings.

3. Lubricate the harness connector 'O' rings with transmission
fluid prior to fitting.
Fit the new 'O' rings, the harness connector and the
retaining clip

4. Tighten selector cable abutment fixings.

5. NOTE: M5 fixing.
Refit the input speed sensor and tighten the retaining screw to
the specified torque figure.

6. NOTE: M6 fixing.
Refit the output speed sensor and tighten the retaining screw to
the specified torque figure.
7. NOTE: Ensure extreme clea nliness and never reuse
transmission fluid.

Automatic Transmission/Transaxle - 4.0L NA V8 - AJ27/3.2L NA V8 - AJ26
- Transmission Range (TR) Sensor
In-vehicle Repair
Removal

1. Disconnect battery ground cable.
Remove the battery cover.

2. From above, disconnect the rota ry switch harness multiplug.

3. From below, release the harn ess from the retaining clips.

4. Remove the rotary switch retaining fixings.

Automatic Transmission/Transaxle - 4.0L NA V8 - AJ27/3.2L NA V8 - AJ26
- Turbine Shaft Speed (TSS) Sensor
In-vehicle Repair
Removal

1. Disconnect battery ground cable.
Remove the battery cover.

2. Raise the vehicle on a lift.
2. WARNING: TRANSMISSION FLUID MAY CAUSE
SEVERE BURNS, ENSURE THAT ALL SAFETY PROCEDURES
ARE OBSERVED.
Carefully remove the drain plug and drain the
transmission fluid.

3. Remove the twenty-two bolts which secure the fluid pan.
Remove the fluid pan and all tr aces of gasket material.

4. Remove the input speed sensor.
• NOTE: M5 fixing.
1. Release the screw which secures the input speed sensor bracket and pull the sensor clear.
5. Disconnect the multiplug from the speed sensor.

Installation



1.
NOTE: M5 fixing.
Connect the multiplug, install the input speed sensor and
securing bracket. Tighten the screw to the specified torque
figure.

2. NOTE: Ensure extreme clea nliness and never reuse
transmission fluid.
Using a new gasket, install the fl uid pan and tighten the twenty-
two fixings to the specified. torque figure.
3. Connect the battery and fit the battery cover..
Reset the radio and the clock.
4. Refer to (44.24.02) for fluid fill procedure.

Stator, intermediate and output shafts. Three epicyclic geartrains. Six multi-disc clutch/brake packs. Two freewheels (One-way clutches). Hydraulic pump. Parking lock assembly. Electro-hydraulic control unit. Internal harness and 13 pin connector with bayonet lock.
Hydraulic pump
This engine driven pump is located at the front of the transmission casing and provides pressure for the hydraulic
functions.
Supplies fluid under pressure to the torq ue converter, geartrain, electro-hydraulic control unit and the lubrication
circuit.
Draws fluid from the fluid pa n below the transmission casing, through a filter.
Parking lock
This component prevents movement of th e vehicle by engaging a fixed pawl with the parking lock gear located on the
output shaft. The pawl is engaged by movi ng the gear selector lever to the park (P) position.
Electro-hydraulic control unit
This unit, mounted in the transmission lower case, converts signals, mechanical from the J-gate and electrical from the
TCM, into hydraulic functions.
The following components ar e assembled to the unit:
Selector valve. Shift plate. Control valve - modulating pressure. Control valve - shift pressure. Solenoid valve 1 <-> 2 and 4 <-> 5 shift. Solenoid valve 3 <-> 4 shift. Solenoid valve 2 <-> 3 shift. Solenoid valve - converter lock-up. Speed sensors (2). Temperature sensor.
Speed sensors
There are two speed sensors within the transmission assembly which provide input to the TCM. These inputs, when used in
conjunction with CAN data relative to engine speed (from ECM) and road speed (from ABS), are used to electronically
control the transmission.
Temperature sensor
The output from this sensor allows the TCM to compensate for the affect of fluid temperature on shift time and quality
Control Systems
Hydraulic Control
The selector valve is operated directly by the J-gate and directs fluid flow for P R N D.
Of the four solenoid valves, 3 control shifts and 1 controls converter lock-up. One control valve controls modulating pressure
and the other shift pressure.
Regulating valves are used to maintain/control pressure for lu brication, normal operating functions, and the supply to the
control valves and shift valves.

In the event of a system fault, the TCM will adopt 'limp home' mode.
Electrical control
Refer to Section 307-01B.
Transmission Control Components
Transmission Control Module (TCM)
The TCM controls the transmission internal components thus determining gear selection and shift pattern.

The TCM is located in the same housing as the engine control module (ECM) and is accessed in the same manner. With the
two connectors unplugged the TCM may be withdrawn, complete with mounting bracket. The mounting bracket is secured to
the TCM by 2 locknuts.
Operation
CAUTION: Disconnection of OTHER contro l module connectors and / or the vehicle battery, may introduce fault codes
(DTCs). Following rectification and reconnection, ensu re that no induced codes exist in the TCM memory.
The TCM processes input and output in both analogue and di gital form which may be summarized in four categories:
Input Signals
Gear selector position (Dual Linear Switch x 4 inputs see 307.05) Transmission oil temperature Kickdown Speed sensor #1 Speed sensor #2 Mode switch

and/or increased performance as appropriate.
Serial Communications Interfaces
Controller Area Network (CAN)
The TCM is an integral part of the CAN system which facilita tes the interchange of real-time data between control modules
and sensors; refer to 303-14 fo r a full description of CAN.
Transmission Pressure Regulators and Shift Solenoids Circuit Diagram

ItemPart NumberDescription
1—Transmission oil temperature sensor
2—Switch
3—Shift solenoid 1 <-> 2, 4 <-> 5
4—Shift solenoid 2 <-> 3