1998 JAGUAR X308 Drive shaft

21. Detach the rotary switch.
1. Remove the switch fixings.
2. Displace the switch harness from the clips.

22. Disconnect the fluid cooler pipes.
Unscrew the cooler pipe tube nu ts, one at each side of the
transmission casing.
Discard the 'O' rings.
Plug the pipes an d transmission.

23. Remove the three bolts which se cure the torque converter to
the drive plate.
1. Remove the access cover.
2. Rotate the crankshaft and hold to prevent movement, and remove the bolts.
24. Remove the LH and RH cataly st mounting brackets from the
transmission case.
Remove the bolts.

Automatic Transmission/Transaxle - 4.0L NA V8 - AJ27/3.2L NA V8 - AJ26
- Transmission
Installation
Installation
Special Tool(s)

Engine support
303-021

Engine lifting brackets
303-536
1. Clean all mating faces and relevant parts.

2. Apply lubricant, Molycote or equivalent, to the spigot of the
torque converter.

3. Align the engine drive plate.
1. Rotate the crankshaft to position the ORANGE dot
within the indicated sector.
• NOTE: Viewed from the rear of the vehicle.
2. Keeping the dot within the sector, align the nearest converter fixing hole to the access aperture.
4. Align the torque converter
1. Rotate the converter to position the BLUE dot within the indicated sector.
2. Keeping the dot within the sector, align the nearest fixing boss as indicated, so that when the two units
are mated, the converter need only be moved the
minimum amount.

5. Fit the transmission to the engine.
Loosely assemble - Cooler pipe clip.
Loosely assemble - Ground lead.
Loosely assemble - Ca talyst brackets.
1. Tighten in sequence 1, 2, 3, 4 as shown on the illustration, then the others in any order.

6. Reposition the mounting brac ket for the engine harness
connector and fit the securing bolts.

7. Connect the drive shaft, aligning any marks made when
removing - if applicable. Tighten the bolts to the specified
torque figure.
8. Fit the engine rear mounting and tighten the centre bolt and
outer bolts to the specified torque figures.
Check that the hooks of the engine support beam are not
trapped, before tighteni ng the rear mounting.
Check that the safety chain on the transmission jack will

not be trapped when the mounting is fitted.

9. Remove the transmission jack.

10. Fit the three bolts which secure the torque converter to the
drive plate.
1. Loosely assemble all three drive plate to torque converter bolts. Whilst preventing crankshaft
rotation, tighten the three converter bolts to the
specified torque figure.
2. Fit the blanking plug.

11. Connect the transmission harness multiplug.
1. Engage the multiplug.
2. Rotate the locking lever to secure.
12. Connect the selector cable to the selector lever and fit the
abutment bracket to the transmission casing. Tighten the nut
and two bolts to the specified torque figure.

Automatic Transmission/Transaxle - 4.0L SC V8 - AJ26 -
Lubricants, Fluids, Sealants and Adhesives - Automatic Transmission (Supercharged Vehicles)
Capacities - Automatic Transmission (Supercharged Vehicles)
Torques - Automatic Transmission (Supercharged Vehicles)
Internal Rear Ratios - Automatic Transmission (Supercharged Vehicles)


UnitSpecification
Transmission fluidShell ATF 3403 - M115
UnitLiters
Transmission assembly (with torque converter)9,5
ComponentNm
Bolt - EMS bracket to cylinder head43 - 53
Bolt - Driveshaft coupling to transmission75 - 88
Bolt - Fluid pan (clamp) to transmission case8 - 10
Bolt - Harness heatshield to case and fluid pan clamp9 - 11
Bolt - Muffler bracket to transmission case43 - 57
Bolt - Rear engine (isolation) mounting to mounting bracket22 - 28
Bolt - Rear engine mounting brac ket to adapter (transmission case)39 - 51
Bolt - Rear engine mounting bracket to body22 - 28
Bolt - Torque converter to drive plate43 - 57
Bolt - Transmission unit to engine43 - 57
Bolt - Valve body to transmission case7 - 9
Bolt - 'W' clip (fluid cooler pipe) to cylinder block7 - 9
Banjo bolt - Cooler pipe to transmission unit30 - 40
Nut - Coolant header tank to bracket4 - 5
Nut - Selector cable abutment to transmission case7 - 10
Nut - Selector cable ball end to selector lever7 - 10
Nut - Transmission output shaft flange200
Plug - Fluid pan drain20 - 24
Screw - Coolant header tank to bracket4 - 5
Screw - Filler tube to transmission case14 - 18
GearRatio
1st3,59:1
2nd2,19:1
3rd1,41:1
4th1,00:1
5th0,83:1
Reverse-1,93 (Normal mode)
Reverse-3,165 (Sport mode)

Automatic Transmission/Transaxle - 4.0L SC V8 - AJ26 - Transmission
Description
Description and Operation
Transmission Assembly
This electronically controlled five speed unit is unique to supercharged vehicles.
Introduction

Parts List
Transmission Fluid
It is not necessary to change the transmis sion fluid in normal service; routine level checking is not required. The sealed
dipstick tube is fitted for service requir ements only, with a dipstick being availa ble as a special tool and NOT fitted as
standard.
Components and Functions
Transmission Casing
The following components are housed within the casing;
ItemPart NumberDescription
1—Torque converter housing
2—Breather
3—Transmission casing
4—Drive flange (output shaft)
5—Fluid pan
6—Selector lever

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.

Range Selection
The 'J' gate selector lever is connected to the transmission via a cable which operates the transmission selector shaft
between positions P R N D only. The shift lever disconnects from the cable when the lever is moved across the gate from D
to 4 .
Movement of the lever between P R N D manu ally controls the flow of transmission fluid, the TCM having control of the
forward gear selected in D .
Movement of the lever to 4 , 3 and 2 positions does not manu ally modify the fluid flow, the TCM detects these positions
using the DLS and controls the ratios electronically by energizing solenoids.
Shift Point Control
The gearshift points are controlled by the TCM, as a function of the output speed, engine load, engine speed, selector
position and shift program selected. The operator has control over the shift points via the shift lever, throttle pedal
movement, kickdown function and mode switch.
Mode Switch
This switch allows operator selection of two base shift modes; Normal and Sport; th e switch being illuminated when Sport is
selected. This function alters the values in the TCM shift point calculations.
Shift Programs
Upon encountering the following conditions, the TCM will auto matically modify the Normal or Sports shift map to enhance
the operation of the vehicle:
1. 1. Traction: When traction intervention is active.
2. 2. Hot mode: Extreme engine/transmission temperatures.
3. 3. Gradient: Under specific speeds and loads.
4. 4. Manual: Driver initiated override of the normal shif t map when the LH side of the 'J gate' is used.
Traction
When traction or stability control (engine or brake system de rived) is operational the TCM will implement the traction map
to maximize control of wheel slip.
Gradient
The gradient function is intended to enhance vehicle drivea bility when climbing a gradient or towing. The TCM will
implement the function when increased driving resistance is de tected, and provides enhanced driveability, additional cooling