1988 PONTIAC FIERO Service Repair Manual

700-R4-14 AUTOMATIC TRANSMISSION
BAND ANCHOR PIN LOCATION
CASE, TRANSMISSION
PIN, BAND ANCHOR
BAND ASSEMBLY,
2-4
GEAR, INPUT SUN
RET., OUTPUT SHAFT TO INPUT CARRIER
CARRIER ASSEMBLY, INPUT
- COMPLETE
BEARING ASSEMBLY, THRUST (INPUT
CARRIER TO REACTION SHAFT)
JH0076-700R4
Figure 90 Input Carrier Removal
10 CASE, TRANS.
687 SHAFT, OUTPUT
10
JH0077-700R4
Figure 91 Output Shaft Support Fixture
10 CASE, TRANSMISSION
664 GEAR, INPUT INTERNAL
666 SHAFT, REACTION CARRIER
669 WASHER, THRUST (REACTION
SHAFT/ SHELL)
670 SHELL, REACTION SUN
673 GEAR, REACTION SUN
674 WASHER, THRUST
(RACEIREACTION SHELL)
675 RACE, LO & REVERSE
ROLLER CLUTCH
676 RING, LO
& REVERSE SUPPORT
TO CASE
RETAINER
678 CLUTCH ASM.,
LO
& REVERSE ROLLER
679 SUPPORT
ASM., LO
& REVERSE CLUTCH
680 SPRING,
TRANSMISSION (LO & REVERSE
CLUTCH SUPPORT RETAINER)
681 CARRIER ASSEMBLY, REACTION
682 PLATE
ASSEMBLY, LO
& REVERSE CLUTCH
682A PLATE, LO
& REVERSE CLUTCH (WAVED)
682B PLATE, LO & REVERSE CL. (SELECTIVE)
683 BEARING ASSEMBLY, THRUST (REACTION
CARRIERISUPPORT) 684 GEAR, INTERNAL REACTION
685 SUPPORT, INTERNAL REACTION GEAR
692 BRG.,
REACTION GEAR SUPPORT TO CASE
693 RING, LO
& REVERSE
CLUTCH RETAINER
694 SPRING
ASM., LO & REVERSE CLUTCH
695 PISTON, LO & REVERSE
CLUTCH
697 DEFLECTOR, OIL (HIGH OUTPUT
MODELS ONLY)
~~0078-700~4
Figure 92 Reaction Gear Set Removal

AUTOMATIC TRANSMISSION 700.84-1 5
(A) APPLY AIR PRESSURE WERE TO REMOVE
LO & REVERSE PISTON FROM THE CASE
Third Accumulator Retainer and Ball Assembly
(80) (Figure 99)
Ball
- missing
- sticking or leaking
Retainer
- missing
- loose
- not seated correctly
- feed slots restricted
Retainer and Ball Assembly Leak Check
Procedure
Important (Figure 99)
1. Install the servo assembly into the servo
bore.
2. Install the servo cover and retainer.
3. Pour a suitable solvent into the accumulator
bore.
DESCRIPTION
701 ACTUATOR ASSEMBLY, PARKING LOCK
Replacement Procedure - Third Accumulator 706 RETAINER, MANUAL SHAFT
707 SHAFT, MANUAL Retainer and Ball Assembly 708 SEAL, MANUAL SHAFT 709 MANUAL DETENT ROLLER & SPRING ASM.
1 Remove or Disconnect (Figure 99 and 100) 710 BRACKET, PARKING LOCK 7 1 1 PAWL, PARKING BRAKE TOOLS REQUIRED: 7 12 SHAFT, PARKING BRAKE PAWL
6.3 mm (#4) Screw Extractor 71 3 PLUG, STEEL CUP
assembly (80)
- use 6.3 (#4) screw extractor
1 Install or Connect (Figure 99 and 100) Figure 94 Parking Linkage
TOOLS REQUIRED:
9.5 mm (3/8 in.) Diameter Metal Rod

700-R4-16 AUTOMATIC TRANSMISSION
707
10 CASE, TRANSMISSION
707 SHAFT, MANUAL
Figure
95 Manual Shaft Seal
~igu-r; 98 Governor Pin Location 1
A CASE SERVO BORE B SERVO EXHAUST HOLE
C 2ND
& 4TH BAND APPLY PASSAGE
D 3RD ACCUMULATOR PRESSURE TAP PASSAGE
80 RETAINER & BALL. ASSEMBLY, 3RD ACCUM.
86 PLUG, CASE SERVO
JH0049-700R4
Figure 96 Servo Bore
81 PLUG. TRANSMISSION CASE ACCUM. BLEED A
3RDACCUMULATOR BORE
C CASE INTERIOR
D
2-4 SERVO BORE
80 RETAINER & BALL ASSEMBLY,
3RD ACCUMULATOR
JH0084-700R4
Figure 99 Leak Check - 3rd Accumulator
Figure
100 Third Accumulator Retainer and Ball Asm. - Installation
~i~ure97Ttiird Aecumularor Bore

AUTOMATIC TRANSMISSION 700-R4-17
A new third accumulator retainer and ball
assembly
oil feed slots in the retainer must line
up with oil passage in the servo bore.
To be certain of correct installation 653 in.) on the 9.5 mm (3/8")
diameter metal rod. Use it to seat the
third accumulator and ball assembly
as shown. When the scribed line is
flush with the case face, installation
depth is correct.
depth, scribe a mark at
42.0 mm (1.

700-R4.18 AUTOMATIC TRANSMISSION
Case Assembly
a Clean
o Thoroughly with solvent
a Air dry
- do not wipe with cloth
Lo and Reverse Clutch Assembly
lnspect (Figure 101)
s Lo and reverse piston (695) for
- porosity or damage
- ring groove damage
e Piston seals (696) for nicks or cuts
o Spring assembly (694) for damage
Retainer ring (693) overstressed
Install or Connect (Figure 101)
TOOLS REQUIRED:
J-23327 Clutch Spring Compressor
1. Piston seals (696) onto the piston (695)
- lubricate with transmission fluid
2. Piston (695) into the case
- index the piston with the notch in the
bottom of the case.
3. Spring
assembly (694) onto the piston
- flat side of the retainer upward
4. J-23327 over
the spring assembly
- compress the spring assembly past the ring
groove in the case hub.
5. Retainer ring (693) into the case hub ring groove
Parking Pawl
Inspect (Figure 102)
a Parking pawl (71 1) for cracks, burrs, or damage
o Parking pawl return spring (714) for distortion or
damage
e Parking pawl pivot shaft (712) for damage and
freeness of fit with the parking pawl
Install or Connect (Figure 102)
1. Parking pawl (71 1) and parking pawl return
spring (714) into the case
2. Parking pawl pivot shaft (712) into the parking
pawl (71
1) and the case
- CHECK FOR PROPER OPERATION
3. Retaining plug (713) into the case
- coat the plug with loc-tite sealant or
equivalent and install it with a hammer and
punch.
Reaction Internal Gear and Carrier Assembly
Inspect (Figures 103, 104, 105)
e Reaction internal gear (683) and support (684)
for
- proper assembly
10 CASE, TRANSMISSION
693 RING, LO
& REVERSE CLUTCH RETAINER
694 SPRING ASSEMBLY, LO & REVERSE CLUTCH
695 PISTON, LO & REVERSE CLUTCH
696 SEALS, LO & REVERSE CLUTCH
JH0087-700R4
Figure 101 Lo and Reverse Piston
710 BRACKET, PARKING LOCK
71
1 PAWL, PARKING BRAKE
712 SHAFT, PARKING BRAKE PAWL
713 PLUG, STEEL CUP
714 SPRING, PARKING PAWL RETURN
715 BOLT, PARKING LOCK BRACKET
JH0088-700R4
Figure 102 Parking Pawl Installation
- stripped splines
- cracks
- teeth or lug damage
e Thrust bearing assemblies (683 and 692) for
damage
e Lo and reverse clutch plates (682)
- Composition for wear, heat damage, or
delamination

AUTOMATIC TRANSMISSION 700-R4-19
- Steel for heat damage or surface finish
damage
Reaction carrier assembly (681) for
- pinion gear damage
- excessive pinion washer wear (end play -20-.
61 mm/.008-.024 in.)
- proper pinion staking
- keystoned pinion gears (pinions must turn
free)
- damaged or worn thrust bearing
To check the captive thrust bearing in the
carrier for wear, place a bushing or an
output shaft sleeve on the bearing race (do
not contact the pinion gears) and turn it
with the palm of your hand. Any
imperfections will be felt through the
bushing.
A PINION GEAR END PLAY -
.20/.60 MM (.008/.024 IN .)
Figure 103 Pinion End Play Check
Reaction Internal Gear and Support
lnstall or Connect (Figures 106)
1. Reaction gear support to case bearing (692) onto
the case hub as shown
- Outside bearing race goes toward case hub.
- retain with petrolatum.
2. Reaction internal gear and support (684 and 685)
onto the bearing as shown
3. Reaction carrier to support thrust bearing
assembly (683) onto the support (685)
- outer bearing race goes toward the support
4. Reaction carrier (681) onto the thrust bearing
Lo and Reverse Clutch
Measure (Figure 107 and 108)
TOOLS REQUIRED
e Scale and straight edge
1. To Measure for proper selection backing plate,
stack the lo and reverse assembly on a flat surface
in the following order:
o 1 waved plate (682B)
662
CARRIER ASSEMBLY, I NPU'T - COMPLETE
690 SLEEVE, OUTPUT SHAFT
JH0090-700R4
Figure 104 Captured Bearing Check
5 fiber and 4 steal plates (682), starting with
one fiber plate and alternating with a steal
plate.
Lo and Reverse Clutch Support (679)
2. Apply an evenly distributed load to the top of the
Lo and Reverse Support Assembly (679) Light
pressure (5 lbs.) on the Lo and Reverse Support
Assembly (679) will provide the correct
dimension for measurement.
CAUTION: EXCESSIVE PRESSURE
WILL START TO FLATTEN THE
WAVE PLATE RESULTING IN AN
INACCURATE MEASUREMENT
3. Measure
the height of the clutch pack from the
work surface to the top of the Lo and Reverse
Clutch Support (Dimension D)
4. Use dimension D to select the proper thickness of
the selective spacer plate for assembly.
5. Install the proper selective spacer plate between
the wave plate and the first fiber clutch plate with
the identification side up.
6. The
overall height for dimension D with the
selective spacer plate included should be 30.515
mm
- 31.401 mm (1.20" - 1.24).
Install or Connect (Figures 107, 108, 109 and 110)
5. Lo and reverse clutch plates (682) into case lugs
- start with a steel plate and alternate with
composition.
- index with the splines of the reaction carrier
and the case as shown.

700-R4-20 AUTOMATIC f RANSMlSSlON
ILL. NO. DESCRIPTION
10 CASE, TRANSMISSION
681 CARRIER ASSEMBLY, REACTION
682 PLATE ASSEMBLY, LO
& REVERSE CLUTCH
682A PLATE, LO
& REVERSE CLUTCH (WAVED) 6828 PLATE, LO & REVERSE CL. (SELECTIVE)
683 BEARING ASSEMBLY, 'THRUST (REACTION
CARRIERISUPPORT) 684 GEAR, INTERNAL REACTION
685 SUPPORT, INTERNAL REACTION GEAR
692 BRG., REACTION GEAR SUPPORT TO CASE
697 DEFLECTOR, OIL (HIGH OUTPUT
MODELS ONLY)
Figure
105 Reaction Internal Gear and Carrier Assembly Installation
ILL.
NO. DESCRIPTION
10 CASE, TRANSMISSION
681 CARRlER ASSEMBLY, REACTION 683 BEARING ASSEMBLY, THRUST (REACTION
CARR I
ER/SUPPORT) 685 SUPPORT, INTERNAL REACTION GEAR 692 BRG., REACTION GEAR SUPPORT TO CASE
697 DEFLECTOR, OIL (HIGH
1 OUTPUT MODELS ONLY) JH0092-700Rd I 1 I Figure 106 Reaction lnternal Gear and Carrier Bearing
Locations
Lo and Reverse Support Assembly
Remove or Disconnect (Figure 11 1)
1. Inner race (675) from the support assembly
2. One retainer ring (677)
3. Roller clutch assembly (678)
@ inspect (figure I 11)
e Inner race (675) for damage and surface finish
a Roller clutch assembly (678) for
- damaged rollers
- broken springs
a Cam and support assembly for
- loose cam
- surface finish
- cracks or damaged lugs.
Install or Connect (Figure 11 1 and 112)
1. Roller clutch assembly (678) into the cam and
support assembly (679)

AUTOMATIC TRANSMISSION 700.R4-21
INSTALL THE APPROPRIATE SELECTIVE
SPACER PLATE TO THE FINAL
ASSEMBLY AFTER DIMENSION "D"
IS OBTAINED. IDENTIFICATION
SIDE UP.
682(B) WAVED
STACK UP FOR
MEASURING
ILL. NO. DESCRIPTION
679 SUPPORT ASSEMBLY, LO & REVERSE CLUTCH
682 PLATE ASSEMBLY, LO & REVERSE CLUTCH 682(A) SPACER PLATE, LO & REVERSE CL. (SELECTIVE) 682(B) WAVE PLATE, LO & REVERSE CLUTCH
Figure 107 Measuring For Back Plate Selection
LO & REVERSE CLUTCH SPACER PLATE SELECTION CHART
I IF GAGE DIMENSIONS 'D' IS I USE THIS SELECTIVE PLATE I
FROM IDENTIFICATION
28.844mm
(1 .I 36") I NONE
Figure 108 Lo and
Reverse Backing Plat
PLATE THICKNESS
JH0190-700R4
? Selection Chart
2. Support and roller assembly into the case with the Reaction Sun Gear and Shell hub down
3. Inner race (675) into the roller assembly
Inspect (Figure 11 4)
4. Turn inner race (675) while inserting e Reaction Sun Gear (673) for - push down for full engagement.
- bottom tangs will be flush with carrier hub - nicked, scored, or worn bushing. (See
when properly installed. Bushing Replacement).
- check for
proper operation by rotating'the - damaged spline or teeth
inner race as shown in Figure
11 1. - loose or weak retaining ring (do not remove
5. Support retainer spring (680) into the case this
ring, except to replace it.)
- insert between the case lug and the one open @ Reaction sun shell (670) for
notch in the support. - stripped or worn splines