Opel Frontera UBS. Manual - part 536

7A–13

AUTOMATIC TRANSMISSION (4L30–E)

Mechanical / Hydraulic Diagnosis Symptoms Index

Perform Preliminary Inspection First!

CHART

SYMPTOMS

1

NO ENGINE START IN NEUTRAL OR PARK

2

NO FORWARD GEARS IN ANY RANGE/NO REVERSE

3

NO ENGINE BRAKE IN ANY RANGE

4

POOR SHIFTING IN ALL GEARS (ALL HARSH OR ALL SOFT)

5a

DELAYS IN DRIVE AND REVERSE

5b

DELAYS IN REVERSE ONLY

6

DIAGNOSTIC TROUBLE CODE (DTC) P0730

7

HARSH 1–2 SHIFT

8

HARSH 3–4 SHIFT

9a

3–2 DOWNSHIFT COMPLAINT

9b

HARSH SHIFT WHEN SHIFTING INTO “D” OR ACCELERATING FROM STOP

9c

COASTDOWN HARSH SHIFT OR CLUNK AT 3–2 DOWNSHIFT

10

INTERMITTENT 4TH TO 2ND GEAR DOWNSHIFT AT STEADY SPEED

11

ENGINE FLARE AT SHIFTING DURING TURNING ONLY

12

ENGINE FLARE DURING 1–2 OR 2–3 SHIFT

13

SHUDDER ONLY DURING TORQUE CONVERTER CLUTCH (TCC) APPLYING

14

POSSIBLE CAUSES OF TRANSMISSION NOISE

15a

POSSIBLE CAUSES OF LOW LINE PRESSURE

15b

POSSIBLE CAUSES OF HIGH LINE PRESSURE

16

POSSIBLE CAUSES OF TRANSMISSION FLUID LEAKS

NOTE: Numbers with parenthesis on the following charts
refer to Parts List at end of this section.

Chart 1: No Engine Start In Neutral Or Park

Step

Action

Yes

No

1

Does engine start when shift lever moved from drive to neutral
mostly in hot condition?

Go to Step 2

Go to Step 3

2

Does engine start in park at any condition?

Re–test vehicle

Go to Step 4

3

Does engine also not start in neutral when shift lever moved from
park to neutral?

Go to Step 4

Go to Step 5

4

Check mode switch (63) setting.  Readjust if necessary.

Problems fixed?

Re–test vehicle

Go to Step 5

5

Check start circuit of mode switch (63) open in neutral.

Was open found?

Locate and repair

open(s)

Replace mode

switch (63)

7A–14

AUTOMATIC TRANSMISSION (4L30–E)

Chart 2: No Forward Gears In Any Range/No Reverse

Step

Action

Yes

No

1

Check line pressure.  Refer to Line Pressure Test in this section.

Was line pressure normal?

Go to Step 2

Use Chart 15a:

Possible Causes

of Low Line

Pressure in this

section

2

1. Check internal linkage:

– Manual linkage (58) not moving manual valve (326).

2. Check for internal mechanical damage:

– Turbine shaft (506) broken loose.
– Overrun roller clutch (516) broken loose.

Was the problem found?

Repair or replace

—

Chart 3: No Engine Brake In Any Range

Step

Action

Yes

No

1

Check line pressure. Refer to Line Pressure Test in this section.

Was line pressure normal?

Go to Step 2

Use Chart 15a:

Possible Causes

of Low Line

Pressure in this

section

2

1. Check for overrun clutch leaks caused by:

– Damaged piston lip (513)
– Check ball defective (504)

2. Check for overrun lockout valve (705) stuck by foreign

material.

3. Check for leaks at turbine shaft (506) caused by:

– Teflon seal rings damaged (508)
– Excessive wear of turbine shaft bearing surfaces.

Was the problem found?

Repair or replace

—

7A–15

AUTOMATIC TRANSMISSION (4L30–E)

Chart 4: Poor Shifting In All Gears (All Harsh Or All Soft)

Step

Action

Yes

No

1

Check line pressure. Refer to Line Pressure Test in this section.

Was line pressure normal?

Go to Step 2

Go to Step 3

2

1. Check for these conditions which could affect clutch apply

time:
– Defective band apply solenoid (323).
– Defective servo or/and accumulator piston.
– Excessive clutch piston travel.

2. Check of possible causes of internal leaks:

– Cut or damaged sealing ring(s)
– Damaged sealing gasket(s)
– Check ball missing or out of location in 2nd and 3rd clutch

pistons.

3. Check for caused of burned clutch plates or band.

Was the problem found?

Repair or replace

—

3

Was the line pressure high?

Go to Step 4

Use Chart 15a:

Possible Causes

of Low Line

Pressure in this

section

4

Were DTCs P0560 and P0705 set?

Diagnose those

DTC(s) first

Use Chart 15b:

Possible Causes

of High Line

Pressure in this

section

Chart 5a: Delays In Drive And Reverse

NOTE: A short delay (less than 3 seconds) when first
engaging drive or reverse after allowing vehicle to sit
overnight is normal.

Step

Action

Yes

No

1

Check line pressure. Refer to Line Pressure Test in this section.

Was line pressure normal?

More than 3

second delay in

drive and reverse

with engine off 1

hour or less.  

Teflon seals (508)

on turbine shaft

damaged. Repair

Use Chart 15a:

Possible Causes

of Low Line

Pressure in this

section.

Chart 5b: Delays In Reverse Only

Step

Action

Yes

No

1

Check line pressure. Refer to Line Pressure Test in this section.

Was line pressure normal?

Go to Step 2

Use Chart 15a:

Possible Causes

of Low Line

Pressure in this

section.

2

Main case valve body gasket (88) damaged.

– Reverse check ball (85) in valve body (84) missing or out of

location.

– Check for restrictions at valve body transfer plate orifice.

Was the problem found?

Repair

—

7A–16

AUTOMATIC TRANSMISSION (4L30–E)

Chart 6: Diagnostic Trouble Code (DTC) P0730

Step

Action

Yes

No

1

Check line pressure. Refer to Line Pressure Test in this section.

Was line pressure normal?

Go to Step 2

Use Chart 15b:

Possible Causes

of High Line

Pressure in this

section

2

1. 1st and 2nd gear missing or 3rd and 4th gear missing.

Check appropriate shift valve. If OK replace solenoid.

2. No engine brake in any range (All ranges in Drive and Reverse

are OK).
Check for suspected conditions modifying delays to clutch
apply:

– Overrun clutch seal damaged.
– Excessive overrun clutch piston travel.
– Defective 3–4 accumulator piston.
– Causes of internal leaks.
– Causes of burned clutch plates.

3. 1st and 4th gear missing or 2nd and 3rd gear missing.

Shift solenoid A stuck. Replace shift solenoid A.

4. DTC P0730 is set in D range 1st gear above  3500 rpm.

Go to Step 3.

5. DTC P0730 is set in D range 3rd gear between 55-80 mph.

NOTE: Perform this test within safe and legal limits.

Check for suspected conditions modifying delays to clutch
apply:

– 4th clutch seal damaged.
– Excessive 4th clutch piston travel.
– Defective 3–4 accumulator piston.
– Causes of internal leaks.
– Causes of burned clutch plates.

Was the problem found?

Repair or replace

—

3

Check 3rd gear in “D” in winter mode.

Does vehicle move?

Shift solenoid A

stuck.  Replace

shift solenoid A.

Go to Step 4

4

Check for suspected conditions modifying delays to clutch apply:

– 2nd clutch seal damaged.
– Excessive 2nd clutch piston travel.
– Defective accumulator piston.
– Causes of internal leaks.
– Check ball missing or out of location in 2nd clutch.
– Seals cut, damaged or missing.
– Gaskets defective.
– Causes of burned clutch plates.

Was the problem found?

Repair or replace

—