1988 PONTIAC FIERO Service Repair Manual

700-R4-38 AUTOMATIC TRANSMISSION
ILL.
NO. DESCRIPTION
605 HOUSING & DRUM ASSEMBLY, REVERSE
INPUT CLUTCH
607 PISTON ASM., REVERSE INPUT CLUTCH
608 SEALS, REVERSE INPUT CLUTCH
(INNER
& OUTER)
609 SPRING ASM., REVERSE INPUT CLUTCH
610 RING, REVERSE INPUT CLUTCH SPRING
RETAINER
6
1 1 PLATE, REVERSE INPUT CL. (BELLEVILLE) 61 2 PLATE ASM., REVERSE INPUT CLUTCH
613 PLATE, REVERSE INPUT CLUTCH BACKING
614 RING, REVERSE INPUT CL. RETAINING
Figure 148 Reverse lnput Clutch Assembly Figure
149 Reverse
lnput Retainer Ring - Removal
A CHECK FOR DISHING AT
THIS POINT
605 HOUSING & DRUM ASSEMBLY, REVERSE INPUT CLUTCH JH0132-700R4
Figure 150 Check Reverse lnput Housing For Dishing
8. Vanes (2 1 5)
9
. Vane guide ring (2 12)
10. Pump slide spring (209)
11. Oil seal assembly
(2), retainer (94).
- use J-25016
Oil Pump Cover
Assemble (Figures 160 and 163)
1. Pressure relief ball (231), spring (232) and rivet
(230)
Inner (229) and outer (228) converter clutch
valve springs into the converter clutch valve bore
Converter clutch valve (227)
Stop valve (226)
Retaining ring (225)
Pressure regulator valve (2 18) into the pressure
regulator bore
Pressure regulator valve spring (219)
T.V. boost valve (222) into the T.V. bushing
- long land of the valve into the large hole of
the bushing.
- retain with petrolatum.
Reverse boost valve (220) into the reverse boost
valve sleeve
- small end of the valve first.

AUTOMATIC TRANSMISSION 700-R4-39
CHECK FOR (.040" - .075")
BACKING PLATE
TRAVEL. / /
Figure 15 1 ~everse lnput Backing Plate Selection
REVERSE INPUT CLUTCH
I NO. I THICKNESS
FLAT STEEL
2.045mm (.081")
CLUTCH PLATE 1.892mm (.075")
COMPOSITION
FACED CLUTCH 1.880mm (.074")
PLATE 1.730mm (.068")
BELLEVILLE 2.31 1mm (.0911')
PLATE 2.210mm (.087") --
BACKING PLATE I 1 I SELECTIVE
-- Figure 152 Reverse Input Clutch Plate Chart
- retain with petrolatum.
10. Reverse boost
valve sleeve (221) into the pressure
regulator bore
11. T.V. boost
valve sleeve (223) into the pressure
regulator bore
12. Retainer ring (224)
Oil Pump Cover and Body
Assemble (Figures 160, 164, 165 and 166)
TOOLS REQUIRED:
J-21368 Oil Pump Body and Cover
Alignment Band
1. Oil pump cover (2
17) onto oil pump body
- stator shaft through a bench hole.
2. Pump cover bolts (236)
BACKING PLATE TRAVEL = 1.02rnrn - 1.94mm
7.60mrn - 7.45rnm
JH0191-700R4
Figure 152A Reverse lnput Backing Plate Selection
Chart
605 HOUSING
& DRUM ASSEMBLY, REVERSE
INPUT CLUTCH
607 PISTON ASM., REVERSE INPUT CLUTCH
609 SPRING ASM., REVERSE INPUT CLUTCH
610 RING, REVERSE INPUT CLUTCH SPRING
RETAINER
61
1 PLATE, REVERSE INPUT CL. (BELLEVILLE)
61 2 PLATE ASM., REVERSE INPUT CLUTCH
61
3 PLATE, REVERSE INPUT CLUTCH BACKING
614 RING, REVERSE INPUT CL. RETAINING
Figure 153 Reverse lnput Clutch
- leave finger tight.
3. Align
pump cover and pump body with J-21368.
- place a screwdriver through a bolt hole and
into a hole in the bench.
4. Torque attaching bolts to 22
N.m (18 ft. lbs.)
5. Pump to case gasket (009) onto case
- retain with petrolatum.
6. Oil seal rings
(233), if removed previously, onto
the pump cover hub
- retain with petrolatum.
7. Pump to case oil seal (008)

700-W4-40 AUTOMATIC TRANSMISSION
ILL.
NO. BESCW IPTIBN
615 BEARING ASSEMBLY, STATOR SHAFT/
SELECTIVE WASHER
616 WASHER, THRUST (SELECTIVE)
621 HOUSING & SHAFT ASSEMBLY, INPUT A
BAND ANCHOR PIN LOCATION
10 CASE, TRANSMISSION
48 PIN, BAND ANCHOR
605 HOUSING & DRUM ASSEMBLY, REVERSE
INPUT CLUTCH
621 HOUSING &SHAFT ASSEMBLY, INPUT
JH0137-700R4
Figure 154 Thrust Bearing and Selective Washer
Location Figure 156 Installirlg lnput
Clutch
605 HOUSING & DRUM ASSEMBLY, REVERSE I INPUT Cl-VTCH I
615 BEARING ASSEMBLY, STATOR SHAFT/ 1 SELECTIVE WASHER
616 WASHER THRUST (SELECTIVE)
Figure
155 Reverse lnput and lnput Clutches
CASE, TRANSMISSION BAND ASSEMBLY, 2-4
HOUSING & DRUM ASSEMBLY, REVERSE
I
INPUT CLUTCH JH0138-700R4 I
Figure 157 2-4 Band Assembly - Installed
- do not twist the seal.
- lubricate with transmission fluid.
8. Thrust washer (601)
Install or Connect (Figure 167)
TOOLS REQUIRED:
5-25025-1 Alignment Pins
1. 5-25025-1 into the case as shown
2.
Oil pump assembly into the case
- align all holes properly.
3. Bolts and washers (5 and 6)

AUTQMATIC TRANSMISSION 700-R4-41
Figure 158 Oil Pump Thrust Washer Location
I OIL PUMP ROTOR SELECTION CHART I
I THICKNESS (mml THICKNESS (in.)
17.948 - 17.961
0.7066 - 0.7071
17.961
- 17.974 0.7071 - 0.7076
17.974
- 17.987 0.7076 - 0.7081
17.987
- 18.000 0.7081 - 0.7086
18.000
- 18.01 3 0.7086 - 0.7091
OIL PUMP SLlDE SELECTION CHART
THICKNESS (mm) THICKNESS (in.)
206 SLIDE, PUMP
214 ROTOR OIL PUMP
Figure 159 Oil Pump Rotor and Slide Selection
- torque to 22 N-m (18 ft. lbs.)
lmportant
Rotate the transmission to a horizontal
position. If the transmission is assembled properly
the turbine shaft should turn by
hand. If not identify and correct the
misassembly now.
Transmission End Play Checlc
a Measure (Figures 168, 169, 170. 171)
TOOLS REQUIRED:
5-24773-A End Play Checking Fixture
J-25022 End Play Checking Fixture
Adaptor (245 mm)
5-34725 End Play Checking Fixture
Adaptor (298 mm)
278 mm (11 in.) Bolt and Nut or
J-25025-7A
Post
Dial Indicator
1. Remove an oil pump to case bolt and install a 278
mm (11 in.) bolt and
lock nut or J-25025-7A.
2. Install 5-25022-A or
5-34725 as shown.
3. Install
J-24773-A as shown.
4. Install a dial indicator.
- set to zero.
5. Pull up on J-24773-A.
- End play should be 0.13 - 0.92 mm (.005 -
,036 in.).
The selective washer which controls end
play is located between the input housing
and the thrust bearing on the oil pump hub.
If more or less end play is required, select
the proper washer from the chart and
install. If dial indicator shows no end play,
the selective washer and thrust bearing have
been misassembled.
Assemble (Figure 172)
1. "0" ring seal (618) into the groove in the end of
the turbine shaft.
lmportant (Figure 173)
e There should be clearance between the reverse
input clutch and the reaction sun gear shell. This
clearance can be observed at the point shown
in-700-R4 Figure 173.
Do not try to shim the
internal parts because of this clearance.
Inspect (Figure 175,176 and 177) -
e The 1-2 accumulator cover and pin assembly (62)
for
- porosity or damage
- scored piston wall
- plugged oil passage
e 1-2 accumulator piston (61) and the 3-4
accumulator piston (52) for
- porosity
- ring groove damage
- pin hole damage
e 1-2 accumulator spring (59) and 3-4 accumulator
spring (54) for distortion or damage
e Spacer plate (56) and gaskets (88 and 89) for
damage

700-R4-42 AUTOMATIC TRANSMISSION
ILL.
NO.
Figure 160 Oil Puml
DESCRIPTION
SEAL ASSEMBLY, OIL
BUSHING, PUMP BODY
RETAINER, FRONT HELIX SEAL
TUBE, AUXILIARY ACCUMULATOR VAI
BODY, PUMP
RING, OIL SEAL (SLIDE TO
WEAR PLATE)
SEAL,
"0" RING (SLIDE SEAL
BACK-UP)
SLIDE, PUMP
SPRING, PIVOT PIN
PIN, PIVOT SLlDE
SPRING, PUMP SLlDE (OUTER)
SUPPORT, PUMP SLlDE SEAL
SEAL, PUMP SLlDE
RING, PUMP VANE
GUIDE, ROTOR
ROTOR, OIL PUMP
VANE, PUMP
SHAFT, STATOR
COVER, PUMP
VALVE, PRESSURE REGULATOR
SPRING, PRESSURE REGULATOR
VALVE
VALVE, REVERSE BOOST
SLEEVE, REVERSE BOOST VALVE
VALVE, T.V. BOOST
BUSHING, T.V. BOOST
RING, OIL PUMP REVERSE BOOST
VALVE RETAINING
RING, OIL PUMP CONVERTER CLUTCH
VALVE RETAINING
VALVE, STOP
VALVE. CONVERTER CLUTCH
SPRING,
CONVERTER CLUTCH
VALVE (OUTER)
SPRING, CONVERTER CLUTCH
VALVE (INNER)
RIVET, PRESSURE RELIEF BOLT
BALL, PRESSURE RELIEF
SPRING, PRESSURE RELIEF
RING, OIL SEAL (STATOR SHAFT)
SEAL, OIL PUMP COVER SCREEN
SCREEN, OIL PUMP COVER
BOLT,
M8 x 1.25 x 40 (COVER
TO BODY)
PLUG, OIL PUMP AIR BLEED
PLUG, OIL PUMP COVER
PLUG, OIL PUMP COOLER FEED
PLUG, OIL PUMP CONVERTER
CLUTCH SIGNAL
RETAINER
& BALL ASSEMBLY,
PUMP COVER
SCREW, STATOR SHAFT (M6
x 1 x 16.0)
SPRING, PUMP SLlDE (INNER)

AUTOMATIC TRANSMISSION 700-R4-43
Figure 16 1 Oil Pump Seal
204 SLIDE
BACI< UP 208 PIVOT PIN 205 SEAL AND RING 210 SUPPORT
207 SPRING 21 1 SLIDE SEAL
JH0143-700R4
Figure 162 Slide Back Up and Slide Seal
o Checkballs (55) for damage
IB T.V. Link (64) for damage
IB Manual detent spring (709) for damage
o Oil filter (71) for
- cut or damaged filter seal (70)
- cracks in the neck or body
- casting flash in the neck
IB Solenoid assembly (50) for
- damage
- cut or pinched wires
- damaged connectors
ILL.
NO. DESCRIPTION
218 VALVE, PRESSURE REGULATOR
219 SPRING, PRESSURE REGULATOR VALVE
220 VALVE, REVERSE BOOST
221 SLEEVE, REVERSE BOOST VALVE
222 VALVE, T.V. BOOST
223 BUSHING, T.V. BOOST
224 RING,
OIL PUMP REVERSE BOOST VALVE
RETAINING
225 RING, OIL PUMP CONVERTER CLUTCH
VALVE RETAINING
226 STOP VALVE
227 VALVE, CONVERTER CLUTCH
228 SPRING, CONVERTER CLUTCH VALVE
(OUTER)
229 SPRING, CONVERTER CLUTCH VALVE
(INNER)
I Figure 163 Pressure Regulator and Converter Clutch
Apply Valve Trains
- cut or damaged "0" ring (49)

700-R4-44 AUTOMATIC TRANSMISSION
Figure 164 Assembly of Oil Pump
233 RING, OIL SEAT
(STATOR SHAFT
Figure 165 Oil Pump Hub Seal Rings
601 THRUST WASHER
Figure 166 Oil Pump Thrust Washer
A ALIGNMENT
PINS 7 OIL PUMP ASSEMBLY
Figure 167 Oil Pump and Case A
298mm TURBINE
SHAFT
B
245mm TURBINE SHAFT
Figure 168 End Play Tool
1 DIAL INDICATOR
2
278mm (1 1") BO 3 LOCKNUT
Figure 169
J-25022-A Installed
Valve Body and Associated Parts
Install or Connect (Figure 178 and 179)
1. The 3-4 accumulator pin (77) into the case
2. The
3-4 accumulator piston
sea1 (53) onto the 3-4
accumulator piston
3. The 3-4 accumulator piston (52) onto the pin
- the end with three legs must face the valve
body.
4. The 3-4 accumulator piston spring (54)

AUTOMATIC TRANSMISSION 700-84-45
TRANSMISSION END PLAY
WASHER SELECTION
CI-IART
6 8
6 9
70
7 1
7 2
73
7 4
JH0148-700R4
Figure 170 End Play Chart
CORRECTLY INSTALLED INCORRECTLY
INSTALLED
,
ILL.
LY
NO. DESCRIPTION
615 BEARING ASSEMBLY, STATOR SHAFT/ SELECTIVE WASHER
616 WASHER, THRUST (SELECTIVE)
621 HOUSING & SHAFT ASSEMBLY, INPUT
Figure
17 1 Selective Washer and Thrust Bearing
Properly Installed
Install or Connect (Figures 177)
TOOLS REQUIRED:
J-25025-5 Guide Pins
1. Governor and converter clutch oil screens (47)
2. Four checkballs (55) into the case as shown
3. J-25025-5 into the case
4. Spacer plate to case gasket (88)
- gasket identified by a "C"
5. Spacer plate (56)
6.
Valve body to spacer plate gasket (89)
- gasket indentified by a "V"
USED WITH USED WITH 298 MM CONVERTER 245 MM CONVERTER
A SHAFT, TURBINE
618 SEAL,"O"RlNG(TURBINESHAFT/
SELECTIVE WASHER) 621 HOUSING & SHAFT
ASSEMBLY, INPUT
JH0109-700R4
Figure 172 Turbine Shaft "0" Ring Seal
A AS INSTALLED THESE TWO PARTS HAVE A
NORMAL END CLEARANCE OF APPROX.
3.8 MM
(.I50 IN) 10 CASE, TRANSMISSION 605 HOUSING & DRUM ASSEMBLY, REVERSE
INPUT CLUTCH
670 SHELL, REACTION SUN ~~0149-700~4
Figure 173 Clearance Between Reverse Input Clutch
and the Sun Gear Shell
Control Valve Assembly
Clean
- Control valve assembly (67) thoroughly in clean
solvent-move the valves with a pick or small
screwdriver to dislodge any dirt
br debris that
may have accumulated
e Air Dry
Disassemble (Figures 178 & 179)
e Control Valve Assembly
- Position as shown on a clean surface
- Remove valve trains beginning with the
upper left hand corner.
NOTE : Some
valves are under pressure
- cover the bores
while removing the roll pins
- Remove blind hole roll pins with a modified
drill bit
- Valves, springs and bushings must be laid
out on a clean surface in the exact sequence
they are removed