Isuzu 1999 RODEO Workshop Manual page 1797

Chart 4: Poor Shifting In All Gears (All Harsh Or All Soft)
Step
1 Check line pressure. Refer to Line Pressure Test in this section.
Was line pressure normal?
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)
3. Check ball missing or out of location in 2nd and 3rd clutch
pistons.
Was the problem found?
3 Was the line pressure high?
4 Were DTCs P0560 and P0705 set?
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
1 Check line pressure. Refer to Line Pressure Test in this section.
Was line pressure normal?
Chart 5b: Delays In Reverse Only
Step
1 Check line pressure. Refer to Line Pressure Test in this section.
Was line pressure normal?
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?
AUTOMATIC TRANSMISSION (4L30–E)
Action
Action
Action
Yes
Go to Step 2 Go to Step 3
Repair or replace
Use Chart 15a:
Possible Causes
of Low Line
Pressure in this
Go to Step 4
Use Chart 15b:
Possible Causes
of High Line
Pressure in this
Diagnose those
DTC(s) first.
Yes
More than 3
second delay in
drive and reverse
with engine off 1
Use Chart 15a:
hour or less.
Possible Causes
Teflon seals (508) of Low Line
Pressure in this
on turbine shaft
damaged. Repair
Yes
Use Chart 15a:
Possible Causes
of Low Line
Pressure in this
Go to Step 2
Repair
7A–15
No
—
section.
section.
No
section.
No
section.
—