Opel Frontera UE. Manual - part 998

 

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Opel Frontera UE. Manual - part 998

 

 

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

—

7A–17

AUTOMATIC TRANSMISSION (4L30–E)

Chart 7: Harsh 1–2 Shift

Step

Action

Yes

No

1

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

Was line pressure normal?

Check for 1–2

accumulator

valve (320) stuck

by foreign

material in main

case valve body.

Use Chart 15b:

Possible Causes

of High Line

Pressure in this

section.

Chart 8: Harsh 3–4 Shift

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. Check for 3–4 accumulator valve (407) stuck in adapter case

valve body (401).

2. Check for 3–4 accumulator piston (18) stuck in adapter case

(20).

Was the problem found?

Repair or replace

—

Chart 9a: 3–2 Downshift Complaint

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

Does DTC P1850 set?

Diagnose P1850

first.

Replace band

apply solenoid

(PWM) (323).

Chart 9b: Harsh Shift When Shifting Into “D” Or Accelerating From Stop

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

Does DTC P1850 set?

Diagnose P1850

first.

Replace band

apply solenoid

(PWM) (323).

7A–18

AUTOMATIC TRANSMISSION (4L30–E)

Chart 9c: Coastdown Harsh Shift Or Clunk At 3–2 Downshift

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

Does DTC P1850 set?

Diagnose P1850

first.

Replace band

apply solenoid

(PWM) (323).

Chart 10: Intermittent 4TH TO 2ND Gear Downshift At Steady Speed

Step

Action

Yes

No

1

Check for consistent speed sensor reading with scan tool.

Was the reading correct?

Replace mode

switch for

intermittent

contact.

Go to Step 2

2

1. Check for wiring harness damage or short to ground. If OK, go

to (2).

2. Check transmission speed sensor connections. If OK, go to

(3).

3. Replace transmission speed sensor.

Was the replacement complete?

—

Replace speed

sensor.

Chart 11: Engine Flare At Shifting During Turning Only (Usually With Warm Engine)

Step

Action

Yes

No

1

Check for oil leaks at transmission.

Was the problem found?

Replace

transmission oil

filter and gasket.

—

Chart 12: Engine Flare During 1–2 Or 2–3 Shift

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 a stuck 1–2 accumulator valve (320).
2. Check for servo piston (106) leaks.
3. Check for a stuck band apply solenoid (323).

Was line pressure normal?

Repair or replace

—

7A–19

AUTOMATIC TRANSMISSION (4L30–E)

Chart 13: Shudder Only During Torque Converter Clutch (TCC) Applying

Step

Action

Yes

No

1

1. TCC shudder is one of the most commonly misdiagnosed

conditions in an automatic transmission.  The key to
diagnosing TCC shudder is to note when it happens and under
what conditions.  Once the TCC has been fully applied, it is
nearly impossible to make it shudder.  TCC shudder (short
burst of noise normally less than 1 second) will only occur
during clutch applying.  It is not a steady state condition.

2. Drive until whole drivetrain is at normal operating temperature.

– On 4WD vehicles, the test must be performed with transfer

case selector lever in “2H” position.

– Shudder is a short burst of noise normally less than 1 second

in duration, and can be induced by the following maneuver:

3. From coast condition at 50 mph in “D” range (Normal mode),

depress the throttle to 1/4-1/3 throttle. If present, shudder will
occur within 5 seconds together with TCC application.(The
scan tool may be used to determine the exact time of TCC).

Was the problem found?

Replace

transmission fluid

and filter (remove

both pans) and

flush cooler lines.

Replace

converter

assembly and

O-ring on turbine

shaft

Perform

mechanical

inspection of

other drivetrain

components.

Chart 14: Possible Causes of Transmission Noise

CAUTION: Before checking transmission for what
is believed to be transmission noise, ensure
presence and positioning of insulating plugs, pads
etc. Also make sure that noise does not come from
other drivetrain components.

Condition

Possible cause

Correction

Whine or Buzz

Oil level low

Fill with ATF, check for external
leaks.

Plugged or restricted oil filter

Inspect oil filter.
Replace oil filter or ATF as necessary.

Damaged oil filter gasket

Replace oil filter gasket.

Knocking noise from front of
transmission

Loose bolts (Converter to flex plate)

Tighten to specifications.

transmission.

Cracked or broken flex plate

Replace flex plate.

Converter damaged

Replace converter.

Knocking noise while driving, mostly
on acceleration.

Transmission mount loose or broken

Tighten mount bolts or replace
transmission mount.

Cooler line mounts loose or broken

Tighten or replace cooler line
mounts.

Cooler lines touching body or frame

Repair or replace as necessary.

Knocking noise when vehicle is
stationary

Loose flex plate mounting bolts

Tighten to specifications.

stationary.

Cracked or broken flex plate

Replace flex plate.

Damaged converter

Replace converter.

 

 

 

 

 

 

 

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