307 JAGUAR X308 1998 2.G Owner's Manual

Contains th
e hydraulic system pump.
Contains
th
e fluid temperature sensor.
The epicyclic geartrain:
Provi des fi
ve forward gears and Reverse.
Has
h
ydraulically actuated, multi-disk clutches, to select the required gear ratios.
Feature

s clutch-to-clutch operation to permit
gear shifts for uninterrupted power flow.
The electro-hydraulic control unit:
Is lo c
ated in the lower part of
the unit, within the fluid pan.
Is controlled
by the TCM (transmissio
n control module), and the manual selector valve which is cable operated.
Re
gulates the flow of fluid to the ge
artrain clutches via three solenoid-operated valv es and the manual selector
valve.
Has fi ve pressure
regulators for controll
ing fluid pressures within the system.
Is con
nected to the TCM via a 16-way connector mounted on
the left-hand side of the transmission casing. Refer to
Connector Pins Identification, Section 307-01A.
The hydraulic system pump:
Is l o
cated at the front of the transmission casing.
Is dri
v
en from the impeller hub,
pressurising the fluid whenever the engine is running.
Supplie
s fluid under pressure to the torq
ue converter, geartrain, electro-hydr aulic control unit and the lubrication
circuit.
D r
aws fluid from the fluid pa
n below the transmission casing, through a filter.
The rear extension housing:
Is bolt
ed to the rear of the transmission casing.
Provides the rear engine / transmi

ssion mo
unting point; refer to section 303-01.
Carrie
s the transmission output shaft oil seal.
Filled-for-l
i
fe Fluid System
The
transm
ission is 'filled for life' and
does not require fluid changes, except where extreme driving conditions prevail.
Routine level checking is not required and a dipstick is not pr ovided. A level / filler plug is fitted for level checking and
replenishment, following service actions; see 303-01 General Procedures.
Transmission Torque Converter

Automatic Transmission/Transaxle - 4.0L NA V8 - AJ27/3.2L NA V8 - AJ26
- Extension Housing Seal
In-vehicle Repair
Removal
Special Tool(s)

Drive shaft flange wrench
205-053

Coupling nut socket
307-356

Oil seal replacer
307-358
1. Remove the rear extension housing, 44.20.19.

2. Fit tool 205 - 053 to the transmission drive coupling.
Install two bolts to attach the coupling to the tool.
3. Locate the tool 205 - 053 / housing assembly in a vice.

4. Using a punch, knock back the two staked areas of the
coupling nut.

Installation

5. Use tool 307 - 356 to remove the coupling nut.
6. Remove tool 205 - 053 from the coupling.

7. Remove the drive coupling from the housing.
Hold the housing assembly in a vice with soft jaws fitted
and pull the co upling free.

8. Remove the housing oil seal.
Use a suitable seal puller.
9. Clean the oil seal mating faces.

1. Install a new housing oil seal.
1. Lubricate the oil se al prior to fitting.
2. Using tool 307 - 358, fit the oil seal.
2. Fit the drive coupling to the housing.

Hold the housing assembly in a vice with soft jaws fitted
and carefully insert the coupling.
Fit tool 205 - 053 to the coupling.

3. Use tool 307 - 356 to tighten th e coupling nut to the specified
torque figure.

4. Stake the coupling nut at two positions.
5. Refit the rear extension housing. Refer to Operation 44.20.19.
6. Check the transmission fluid level. Refer to Operation
44.24.02.

Automatic Transmission/Transaxle - 4.0L NA V8 - AJ27/3.2L NA V8 - AJ26
- Input Shaft Seal
Disassembly and Assembly of Subassemblies


Special Tool(s)

Oil seal replacer
307-357
1. Remove the transmission unit, 44.20.01.
2. Remove the torque converter from the transmission unit,
44.17.07.

3. Remove the front pump seal.
Remove and discard the seal retaining snap-ring.
Using a 'Snap-on' oil seal puller, remove and discard the
seal.
4. Clean the seal housing.
5. Installation is th e reverse of the re moval procedure.

6. Use tool 307 - 357 to install the seal.
Lubricate the seal pr ior to fitting.

Automatic Transmission/Transaxle - 4.0L NA V8 - AJ27/3.2L NA V8 - AJ26
- Torque Converter
Disassembly and Assembly of Subassemblies


Special Tool(s)

Lifting handle
307-139
1. Remove the transmission unit from the vehicle; 44.20.01.

2. Remove the torque converter from the transmission unit.
Install lifting handles 307 - 139.
3. Remove lifting handles 307 - 139 from the torque converter.
4. Clean the torque conver ter and mating faces.

5. CAUTIONS:
Use extreme care NOT to damage the oil seal with the
converter spigot.
Ensure that the conver ter is fully located.
Install the torque converter.
1. Install lifting handles 307 - 139.
2. Lubricate the front pump seal.
To facilitate location, rotate the converter as it is being
fitted and note the engagement of splines and oil pump
drive.
6. Check that the three conver ter fixing boss faces are
approximately 8,0 mm proud of the transmission mounting
face.
7. Remove lifting handles 307 - 139 from the torque converter.
8. Install the transmission unit; refer to Operation 44.20.01,
noting especially the alignment instructions.

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

Automatic Transmission/Transaxle - 4.0L SC V8 - AJ26 - Transmission
Fluid Drain and Refill
General Procedures
Special Tool(s)

Dipstick
307-379
1. Disconnect the battery ground lead.
2. Raise the vehicle for access.

3. NOTE: This procedure will not re move residual fluid from the
torque converter.
Drain the transmission fluid.
3. WARNING: TRANSMISSION FLUID MAY CAUSE
SEVERE BURNS, ENSURE THAT ALL SAFETY PROCEDURES
ARE OBSERVED AND THAT THE RECEPTACLE FOR WASTE
HAS SUFFICIENT CAPACITY.
Carefully remove the drain pl ug and discard the sealing
washer.

4. Refit the drain plug and tighten to the specified torque figure.
Use a new sealing washer.
5. Connect the PDU to monitor the fluid temperature.
6. Access the dipstick tube.
1. Break off the dipstick tube plug locking plate.
2. Push the locking pin downward, into the plug.
3. Remove the dipstick tube plug.
Push the locking pin through the tube plug and discard the
pin.

10. Cycle the gear selector:
From P to D.
From D to R.
From R to P.

11. NOTE: Temperature will ONLY be displayed in D or R.
Check the transmission fluid temperature to select the
appropriate dipstick calibration. 1. MAX and MIN marks at 25°C fluid temperature.
2. MAX and MIN marks at 80°C fluid temperature.

12. Check the transmission fluid level.
Insert the dipstick (special tool 307 - 379) until it stops
(tip contact with the fluid pan).
Remove the dipstick an d check the level.
• NOTE: Only use a lint free cloth to wipe the dipstick.
Repeat this operation.
13. Correct the fluid leve l as required, noting that excess fluid
MUST be removed.
14. STOP the engine and remove the dipstick.
15. Seal the dipstick tube.
1. Seat the tube plug.
2. Engage and fully seat the new locking pin.

Automatic Transmission/Transaxle - 4.0L SC V8 - AJ26 - Extension
Housing Seal
In-vehicle Repair
Removal
Special Tool(s)

Oil seal replacer
307-378

Driveshaft wrench
205-053
1. Disconnect the battery ground lead.
2. Select N and choc the road wheels.
3. Remove the front muffler, re fer to Operation 30.10.18.

4. Remove the engine rear mounting bracket.
1. Support the transmission.
2. Remove the bolt, engine rear mounting to transmission.
3. Remove the four bolts which secure the mounting
cross member to the body.

5. Detach the driveshaft from th e transmission drive flange.
1. If the transmission is to be refitted, mark the position of the coupling relative to the drive flange.
5. CAUTION: Under no circ umstances remove the
driveshaft to flexible coupling fixings.
2. Remove the three bolts, tr ansmission drive flange to
flexible coupling.
6. Secure the driveshaft wrench 205 - 053 to the output shaft
flange.