engine OPEL FRONTERA 1998 Workshop Manual

7A–86 AUTOMATIC TRANSMISSION (AW30-40LE)
TRANSMISSION REMOVAL AND INSTALLATION
240RY00038
Removal Steps
1. Transfer protector
2. Rear sound cover
3. Front sound cover
4. Rear propeller shaft
5. Front propeller shaft
6. Exhaust pipe
7. Harness connector
8. Front console, selector lever assembly, and
transfer control lever
9. Transfer case assembly
10. ATF cooler pipe and clamp11. Under cover and flex plate-torque conver ter
bolt
12. Rear mounting nut
13. 3rd crossmember
14. Oil level gauge and tube
15. Starter
16. Engine-transmission bolt
17. Transmission assembly
Installation steps
To install, follow the removal steps in reverse order.

AUTOMATIC TRANSMISSION (AW30-40LE) 7A–87
253RY00001
REMOVAL
Preparation
:
• Remove engine hood.
• Disconnect negative (–) battery cable.
1. Transfer protector
2. Rear sound cover
3. Front sound cover
4. Rear propeller shaft
5. Front propeller shaft
NOTE:
Apply alignment marks on the flange at both front and rear
sides.
6. Exhaust pipe
• Remove the 2nd front exhaust pipe from the 1st front
exhaust pipe and exhaust silencer.
7. Transmission harness connector
• Disconnect the harness connectors from the
transmission.
8. Front console, selector lever assembly, and transfer
control lever
• Disconnect the transfer control lever knob.
• Remove the front console.
• Disconnect the harness connector.
• Remove the selector lever assembly.
• Disconnect the shift control rod from the transmission.
9. Transfer case assembly
• Disconnect the breather hose from the transfer case.
• Remove the transfer case assembly from the
transmission.
10. ATF cooler pipe and clamp
• Disconnect two ATF cooler pipes from A/T side.
• Remove oil pipe clamp from torque converter housing
side.
• Loosen oil pipe clamp bolt at engine mount side.

7A–88 AUTOMATIC TRANSMISSION (AW30-40LE)
240RY00026
022RY00001
11. Under cover and flex plate-torque converter bolt
• Remove the under cover.
• Turn the crankshaft to gain access to each bolt.
Remove the six torque cover ter fixing bolts.
NOTE:
New fixing bolts should be replaced for reassembly.
12. Rear mounting nut
• Support transmission with a jack.
• Remove two rear mounting nuts from the 3rd
crossmember.
13. 3rd crossmember
14. Oil level gauge and tube
15. Starter
• Remove the mounting bolts, and pull the star ter toward
the front of the vehicle.
Lay the star ter alongside the engine.
16. Engine-transmission bolt
• Remove engine-transmission fixing bolts.
• Disconnect the breather hose from the breather hose 3
way (W/TOD) or 2 way (WO/TOD).
17. Transmission assembly
NOTE:
Keep the oil pan positioned down.
Be careful not to let the torque converter slide out.

AUTOMATIC TRANSMISSION (AW30-40LE) 7A–89
INSTALLATION
To install, follow the removal steps in the reverse order,
noting the following points;
1. Torque
Engine-Transmission Bolt Torque
225RY00001
Nꞏm(kgꞏm / lbꞏft)
Rear mounting to crossmember 50 (5.1/37)
Torque conver ter bolt 29 (3.0/22)
ATF cooler pipe to transmission 44 (4.5/33)
Exhaust pipe flange to flange 43 (4.4/32)
3rd crossmember to flame 76 (7.8/56)
Front propeller shaft bolt 63 (6.4/46)
Rear propeller shaft bolt 63 (6.4/46)

7A1–6
TRANSMISSION CONTROL SYSTEM (4L30–E)
Shift Control
The transmission gear is shifted according to the shift
pattern selected by the driver. In shifting gears, the gear
ratio is controlled by the ON/ OFF signal using the shift
solenoid A and the shift solenoid B.
Band Apply Control
The band apply is controlled when in the 3–2 downshift
(engine overrun prevention) and the garage shift (shock
control).
The band apply solenoid is controlled by the signal from
the Pulse Width Modulation (PWM) to regulate the flow of
the oil.
Torque Converter Clutch Control
The clutch ON/OFF is controlled by moving the converter
clutch valve through shifting Torque Converter Clutch
(TCC) solenoid using the ON/OFF signal.
Line Pressure Control
The throttle signal allows the current signal to be sent to
the force motor. After receiving the current signal, the
force motor activates the pressure regulator valve to
regulate the line pressure.
On–Board Diagnostic System
Several malfunction displays can be stored in the
Powertrain Control Module (PCM) memory, and read out
of it afterward.The serial data lines, which are required for the testing of
the final assembly and the coupling to other electronic
modules, can be regulated by this function.
Fail Safe Mechanism
If there is a problem in the transmission system, the PCM
will go into a “backup” mode.
The vehicle can still be driven, but the driver must use the
select lever to shift gears.
Torque Management Control
The transmission control side sends the absolute spark
advance signal to the engine control side while the
transmission is being shifted. This controls the engine
spark timing in compliance with the vehicle running
condition to reduce the shocks caused by the change of
speed.
ATF Warning Control
The oil temperature sensor detects the ATF oil
temperature to control the oil temperature warning, TCC,
and the winter mode.
ABS Control (If equipped)
When the select lever is at “L” or “R” range, a signal is sent
to the ABS controller as one of the ABS control
conditions.