General Service Precautions; Speedometer Driven Gear - Pontiac Fiero 1988 Service Manual

ON-VEHICLE
SERVICE
7A1-11
GENERAL SERVICE PRECAUTIONS
• When servicing the transaxle, It is recommended
that upon disassembly of a unit, all parts should
be cleaned and inspected.
• The unit should be reassembled before disassem-
bly of other units to avoid confusion and inter-
changing of parts.
• Before disassembly of the unit, thoroughly clean
the exterior.
• Disassembly and reassembly of the unit and the
subassemblies must be made on a clean work
bench. As in repairing any hydraulically oper-
ated unit, cleanliness is of the utmost impor-
• tance; therefore, the bench tools, and parts must
be kept clean at all times.
• Before installing cap screws into aluminum
parts, ALWAYS DIP SCREWS INTO TRANS-
MISSION OIL to prevent cap screws from gall-
ing the aluminum threads and also to prevent the
screws from seizing.
• Always use a torque wrench when installing cap
screws into aluminum parts to prevent the possi-
bility of stripping the threads.
• If tapped threads in aluminum parts are stripped
or damaged, the part can be made serviceable by
the use of Heli-coils or equivalent.
• Seal-protecting tools must be used when assem-
bling the units to prevent damage to the seals.
The slightest flaw in the sealing surface of the
seal can cause an oil leak.
• The aluminum castings and the valve parts are
very susceptible to nicks, burrs, etc., and care
should be exercised when handling them.
• The internal snap rings should be expanded and
the external snap rings compressed if they are to
be reused. This will ensure proper seating when
installed.
• Replace all "O" rings, gaskets and oil seals that
are removed. Teflon oil seal rings should not be
removed unless damaged.
• During assembly of each unit, all internal parts
must be lubricated with oil.
ON-CAR SERVICE
SERVICEABLE COMPONENTS
The following parts can be serviced with the
transaxle in the car. For part removal and installation
procedures not listed in this section, refer to the disas-
sembly and reassembly sections.
1. Throttle valve control cable and/or sleeve seal.
2. Filler pipe and/or sleeve seal.
3. Governor assembly and speedometer gear
assembly.
4. Intermediate servo assembly and direct clutch
accumulator check valve.
5. Valve body assembly, spacer plate, gaskets,
throttle lever and bracket assembly, pump shaft,
valve body cover and gasket, TCC solenoid,
switch and wiring.
6. Converter to flexplate bolts.
7. Oil pan and/or gasket, strainer assembly and
"O
59
ring.
8. Lo and Reverse pipe, "O" ring seal and oil seal.
9. Fluid level indicator bracket, parking pawl and
return spring.
10. Output shaft, axle joint retaining ring, snap ring
(shaft) and axle oil seals.
11. Cooler fittings, manual valve, and electrical
connector.
12. Spring and seal, thermostatic element assembly,
manual detent spring and roller assembly,
sprockets, drive link and thrust washer.
13. 3rd clutch pressure switch, solenoid, auxiliary
valve body, cover and gasket.
14. Park/Neutral and back-up lamp switch.
SPEEDOMETER DRIVEN GEAR
F+l
Remove or Disconnect
Figure 8
1. Negative ( —) battery cable.
2. Electrical connector at sensor assembly.
3. Sensor assembly retainer.
4. Sensor assembly.
5. Speedometer drive gear from sensor assembly.
| \ | Important
• Reassemble using new O-rings.
1 - S E N S O R A S S E M B L Y
2 - S E A L , ' O ' R I N G
3 - S P E E D O M E T E R
D R I V E N G E A R
4 - C O V E R , G O V E R N O R
5 - S C R E W , G O V E R N O R
C O V E R T O C A S E
6 - S E A L / O ' R I N G
7 - W A S H E R , S P E E D O G E A R T H R U S T
8 - G E A R , S P E E D O M E T E R D R I V E
9 - G O V E R N O R A S S E M B L Y
1 0 - R I N G O I L S E A L
11 - R E T A I N E R
520122-7A
Figure 8 Governor and Speedometer
Sensor Assembly