Pontiac Fiero 1988 Service Manual page 729

7A1-6 ON-VEHICLE SERVICE
• Drive shaft couplings worn. Refer to
Section 4D.
• Shock absorbers worn or loose. Refer to
Section 3.
• Front suspension worn, loose or mis-
aligned. Refer to Sections 3 and 3A.
2. Vibration In "Park" and "Neutral". Worse at
idle, tends to disappear as engine speed is
increased.
Inspect
• Engine Performance
— Spark plugs and wires
— Timing
— Compression. Refer to Section 6A.
• Engine/Torque Converter Balance
— Flywheel balance weight loose or
missing. Refer to Section 6A.
— Torque converter out of balance.
SERVICE PROCEDURES
CHANGING FLUID A N D FILTER
Before diagnosis of any transmission complaint
is attempted, there must be understanding of oil
checking procedure and what appearance the oil
should have. Many times a transmission malfunction
can be traced to low oil level or improper reading of
dipstick. Due to the transmission fluid that is now
being used, it may appear to be darker and have a
stronger odor. This is normal, and not a positive sign
of required maintenance or transmission failure. Also
when the dipstick is removed, it should be noted
whether the oil is devoid of air bubbles or not. Oil
with air bubbles gives an indication of an air leak in
the suction lines, which can cause erratic operation
and slippage. Water in the oil imparts a milky, pink
cast to the oil and can cause spewing.
CHANGING FLUID A N D FILTER
1. Raise vehicle and suitably support. See
Section OA.
2. Place drain pan under transaxle oil pan.
3. Oil pan bolts front and sides.
4. Loose rear oil pan bolts approximately 4 turns.
5. Pry oil pan loose with a screwdriver and allow
fluid to drain.
6. Remaining oil pan bolts, pan, and gasket.
7. Screen/filter and seal.
[Tl Important
• Oil pan and screen for foreign material:
— Metal particles
— Clutch facing material
— Rubber particles
— Engine coolant
• Determine and correct source of
contamination.
S
Clean
• Gasket mating surfaces
• Remove all traces of old gasket
• Oil pan in solvent and blow dry
Remove or Disconnect
1. Screen, using a new filter and seal. Coat seal
with petroleum jelly. Torque screen to specifi-
cation, see Unit Repair Section.
2. Oil pan, using a new gasket. Torque bolts to
specification, see Unit Repair Section.
3. Lower vehicle.
4. Fill transaxle with the proper quantity of Dexron
II®. Refer to fluid capacities.
5. Place gear selector into "Park".
6. Start engine and run at slow idle. Do not race
the engine.
7. Check fluid level. Correct as required.
SHIFT SYSTEM CABLE REMOVAL
Removal procedure for automatic shift link-
age cables (shift and park lock) with nylon
ends.
• If cable end has a plug (reference Figure 2), push
on plug to spread tangs then remove cable end
from lever pin (shifter, transmission, etc.).
• If cable end does not have a plug, use a screw-
driver or flat tool as shown in Figure 3.
Insert tool between lever and nylon
end at the pin center line. Rotate
tool and cable end will snap off pin.