Automatic transmission-50
Only can 1→ 3→ 4
shifting
The small O-ring of front servo piston is invalid or lost.
2→ 3 Gear psition shifting valve is blocked.
Detect the O-ring. Process the replacement or
reinstallation if necessary. Detect the 2 → 3
Gear shifting valve; Process the maintenance
or replacement according to the requirement.
Only can 1→ 2→ 1
shifting
C1 is invalid or 3
rd
-Gear and 4
th
-Gear is loose. (give to
1
st
-Gear in 3
rd
-gear; give to 2
nd
-Gear in 4
th
-Gear)
Detect the clutch C1. Repair or replace it if
necessary.
Can not realize the
manual 4→ 3, 3→ 2, 2
→ 1
Overspeed clutch /ball spool has displacement.
C4 is invalid.
Detect the ball spool. Process the replacement
or reinstallation according to the requirement.
Detect the C4. Repair C4 or replace the C4
wave pan according to the necessary.
Without manual
1
st
-Gear
The rear brake belt is loose when the temperature is
high.
The R-Gear/Low speed 1
st
-Gear ball spool has
displacement.
The internal “O” –ring of rear servo is lost.
C4 is invalid.
Detect the rear brake belt, adjust id necessary.
Detect the ball spool, R einstall or replace it if
necessary.
Detect the O-ring, Reinstall or replace it if
necessary.
Detect the C4. Repair or replace it if necessary.
Only can 1→ 2→ 2→ 4
gear.
The dimension of socket of front servo is large. Has the
possibility of loose of plug.
It has the trend that can not realize the reverse-Gear if
drive the vehicle in this condition continuously.
Repair or replace it if necessary.
Detect the C3 piston O-ring, replace it if
necessary.
Only an 1
st
-gear,
2
nd
-Gear, 4
th
-Gear or
1
st
-Gear, 2
nd
-Gear and
3
rd
-Gear.(3
rd
-Gear is
tightened)
The gear sensor has failure, only can1→ 2→ 3 shifting.
3→ 4 Gear shifting valve is blocked.
Detect the gear-position sensor. Repair or
replace it if necessary. Detect the 3→ 4 gear
shifting valve. Repair or replace it if
necessary.
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