On-Vehicle Service; Essential Service - Mitsubishi Pajero Pinin 1999 Workshop Manual

23-34
AUTOMATIC TRANSMISSION ±

On-vehicle Service

ON-VEHICLE SERVICE

ESSENTIAL SERVICE

AUTOMATIC TRANSMISSION FLUID CHECK
Caution
When the transmission has been replaced or overhauled,
or driving has been carried out under the severe condition,
the A/T fluid cooler line flushing should always be carried
out and also, the A/T fluid should always be replaced.
1. Drive the vehicle until the A/T fluid temperature rises to
the normal temperature (70 ± 90 C).
2. Park the vehicle on a level surface.
3. Move the selector lever through all positions to fill the
torque converter and the hydraulic circuits with A/T fluid,
and then move the selector lever to the N position.
4. After wiping off any dirt around the oil level gauge, remove
the oil level gauge and check the condition of the A/T
fluid.
NOTE
If the A/T fluid smells as if it is burning, it means that
the A/T fluid has been contaminated by the particles from
the bushes and friction materials, a transmission overhaul
and flushing the A/T fluid cooler line may be necessary.
5. Check that the A/T fluid level is at the HOT mark on the
oil level gauge. If the A/T fluid level is lower than this,
pour in more A/T fluid until the level reaches the HOT
mark.
Automatic transmission fluid:
DEXRON II or equivalent
NOTE
If the A/T fluid level is low, the oil pump will draw in air
along with the A/T fluid, which will cause bubbles to form
inside the hydraulic circuit. This will in turn cause the
hydraulic pressure to drop, which will result in late shifting
and slipping of the clutches and brakes.
If there is too much A/T fluid, the gears can churn it up
into foam and cause the same conditions that can occur
with low A/T fluid levels.
In either case, air bubbles can cause overheating and
oxidation of the A/T fluid which can interfere with normal
valve, clutch, and brake operation. Foaming can also result
in A/T fluid escaping from the transmission vent hole, in
which case it may be mistaken for a leak.
6. Securely insert the oil level gauge.