1988 PONTIAC FIERO Service Repair Manual

700-R4-54 AUTOMATIC TRANSMISSION
ILL.
NO. DESCRlPTlON
A CASE SERVO BORE
13 RING, SERVO COVER RETAINING
14 SEAL,
"0" RING (2-4 SERVO COVER)
15 COVER, 2-4 SERVO
16 PISTON, 4TH APPLY 17 RING, OIL SEAL (4TH APPLY PISTON)
(OUTER)
18-30 2ND APPLY PISTON ASSEMBLY
21 SEAL.
"0" RlNG
24 RING,' OIL SEAL (2ND APPLY PISTON) (OUTER)
31 SPRINGT~~ERVO RETURN
JH0057-700R4
Figure 19 1 2-4 Servo Bore Figure
192 Servo
Cover - Installed
GOVERNOR ASSEMBLY
A VALVE
B SECONDARY WEIGHT
C PRIMARY WEIGHT
D WEIGHT SPRING
E SLEEVE AND CARRIER
82 DRIVEN GEAR RETAINING PIN
83 DRIVEN GEAR
84 WEIGHT PINS
85 THRUST CAP
Figure 193 Governor Assembly
Install or Connect (Figures 193, 194)
1. Governor assembly (45) into the governor bore
2. Governor Cover (46)
- apply sealant, such as loctite cup plug
sealant
# 11 or equivalent to cover flange
before installation.

AUTOMATIC TRANSMISSION 700-R4-55
A APPLY SEALANT ON THIS FLANGE BEFORE
INSTALLATION
10 CASE TRANSMISSION
Figure
194 Governor Cover
Install or Connect (Figures 195 thru 201)
MECHANICAL SPEEDOMETER
TOOLS REQUIRED:
J-23 103 or J-25016 Seal Installer
J-21426 Seal Installer
1. Speedometer
drive gear (689) and clip (688)
- if the output shaft has two speedometer
locating holes, use the hole nearest the yoke
spline for Corvette vehicles only.
2. "0" ring seal (691) on the output shaft sleeve
3. Output shaft sleeve (690) on the output shaft
- use J-25016 or J-23103.
- do not push the sleeve past the machined
surface on the output shaft.
4. Seal
ring (35) on the case extension
5. Case extension
(36) and bolts
(37) or, stud (100)
and nut (98)
- position extension so the speedometer bore
is on the governor side of the case.
- torque to 35 N-m (26 ft. lbs.)
6. Remove case extension oil seal (89)
- pry out with a screwdriver
- install new seal with J-21426
7. Speedometer driven gear (44) and assembly (43)
or speed sensor (99)
8. Retainer (40) bolt and washer (41)
9. Outside
electrical connector, manual lever and
nut
Torque Converter Assembly
Inspect
The torque converter assembly (1) must be
replaced for any of the following conditions:
e Evidence of damage to the pump assembly
e Metal particles are found after flushing the cooler
and cooler pipes
a External leaks in hub weld area
e Converter pilot is broken, damaged or poor fit
into crankshaft
e Converter hub is scored or damaged
Internal damage to stator
e Contamination from engine coolant
a Excess end play
A SPEEDO CLlP HOLE FOR CORVETTE ONLY
B SPEEDO CLlP HOLE FOR ALL OTHER
VEHICLES
Figure
195 Speedo. Clip Holes
688 CLIP, SPEEDO DRIVE GEAR
689 GEAR, SPEEDO DRIVE
Figure 196 Speedometer Gear
688 CLIP, SPEEDO DRIVE GEAR
689 GEAR, SPEEDO DRIVE
Figure 197 Speedo. Gear
- Installation

700-W4-56 AUTOMAT lC TRANSMISSION
690 SLEEVE, OUTPUT SHAFT
691 SEAL. OUTPUT SHAFT
Figure 198 Output Shaft Sleeve and Seal
Figure 199 Output Shaft Sleeve
- Installation
35 SEAL, CASE EXTENSION TO CASE
36 EXTENSION CASE
9 9'
i SOME MODELS ILL. ----- - -- - 1
NO. DESCRIPTION
10 CASE, TRANSMISSION
35 SEAL, CASE EXTENSION TO CASE
36 EXTENSION, CASE
37 BOLT, CASE EXTENSION TO CASE
39 SEAL ASSEMBLY, CASE EXTENSION OIL
40 RETAINER, SPEEDO DRIVEN GEAR FITTING
41 BOLT
& WASHER ASSEMBLY
42 SEAL,
"0" RING (SPEEDO FITTING TO
CASE EXTENSION)
43 FITTING ASSEMBLY, SPEEDO DRIVEN GEAR
44 GEAR, SPEEDO DRIVEN
45 GOVERNOR ASSEMBLY
46 COVER, GOVERNOR
99 SPEED SENSOR, INTERNAL TRANSMISSION
100 BOLT, SPEEDO SENSOR RETAINING
687 SHAFT, OUTPUT
688 CLIP, SPEEDO DRIVE GEAR
689 GEAR, SPEEDO DRIVE
690 SLEEVE, OUTPUT SHAFT NOT USED ON
691 SEAL, OUTPUT SHAFT ALL MODELS
Figure 201 Case Extension and Associated Parts
Figure
200 Case Extension and Seal

AUTOMATIC TRANSMISSION 700-R4-57
If:
e
Measure (Figure 203)
Tool Required:
J-35138 Torque Converter End Play
Checking Tool
Install J-35 138 and measure end play
- Omm - .5mm (.02OU) for 245mm
Torque Converters
- Omm - .6mm (.024") for 298mm
Torque Converters
The Torque Converter Should Not Be Replaced
e The fluid has an odor, discolored or no
evidence of metal or clutch plate material
- Drain out as much fluid as possible
- Replace the oil filter and pan gasket
- Fill to proper level (Refer to Section
7A)
The converter bolt hole threads are damaged - Correct with thread insert (Refer to Section
6-4)
Flushing the torque converter is not
recommended.
Install or Connect
Torque converter (1)
J-2 1366 converter holding strap
Remove transmission from holding fixture
Figure 203 Checking Torque Converter End Play

700-R4-58 AUTOMATIC TRANSMISSION
ILL. NO. DESCRIPTION
601 WASHER, THRUST (PUMP TO DRUM)
608 SEALS, REVERSE INPUT CLUTCH
(INNER
& OUTER)
61 5 BEARING ASSEMBLY, STATOR SHAFT1
SELECTIVE WASHER
61 6 WASHER, THRUST (SELECTIVE)
622 SEAL,
"0" RING INPUT TO FORWARD HSG.
624 SEAL, 3RD & 4TH CL. (INNER & OUTER)
629 SEAL, FORWARD CLUTCH (INNER & OUTER)
631 SEAL, OVERRUN CLUTCH (INNER & OUTER)
637 BEARING ASSEMBLY, INPUT SUN GEAR
ILL. NO.
663
669
674
683
692
696 DESCRIPTION
BEARING ASSEMBLY, THRUST (INPUT
CARRIER TO REACTION SHAFT)
WASHER, THRUST (REACTION SHAFT1
SHELL)
WASHER, THRUST
(RACEIREACTION SHELL)
BEARING ASSEMBLY, THRUST (REACTION
CARRIERISUPPORT) BRG., REACTION GEAR SUPPORT TO CASE
SEAL, TRANSMISSION (LO & REVERSE
CLUTCH - OUTER, CENTER, INNER)
Figure 204 Seals and Bearing Locations

AUTOMATIC TRANSMISSION 700.R4.59
ILL.
NO. DESCRIPTION ILL.
NO. DESCRIPTION
3 BUSHING, OIL PUMP BODY 657
BUSHING, INPUT SUN GEAR (FRONT)
4 BUSHING, STATOR SHAFT (REAR) 659
BUSHING, INPUT SUN GEAR (REAR)
38 BUSHING, CASE EXTENSION 665
BUSHING, REACTION SHAFT (FRONT)
76 BUSHING, CASE 667
BUSHING, REACTION SHAFT (REAR)
90 BUSHING, STATOR SHAFT (FRONT) 672 BUSHING, REACTION SUN GEAR
603 BUSHING, REVERSE INPUT CLUTCH (FRONT)
606 BUSHING, REVERSE INPUT CLUTCH (REAR)
TORQUE SPECIFICATIONS
ACCUMULATOR 1 1 M6 I 11N.m COVER TO CASE 1.0~35.0 (8 FT.-LB.)
DETENT SPRING TO PUMP
ASSY. TO
CASE EXTENSION
PRESSURE PLUGS
TRANSMISSION OIL
PAN TO CASE PRESSURE
PLUGS
1 3 1 l4 - 8 1 (1 8 24 FT.-LB.) N'm
NECTOR COOLER
PRESSURE SWITCHES~ 1-3 1 X - 27 1
Figure 205 Torque Specifications and Bushing Locations

700-R4-60 AUTOMATIC TRANSMISSION
PROTECT PARTS WITH WOOD BLOCKS OR CLOTH AS NECESSARY
4 BUSHING, STATOR SHAFT - FRONT
90 BUSHING, STATOR
SHAFT
- REAR
217 COVER, PUMP 4 BUSHING, STATOR SHAFT - FRONT
90 BUSHING, STATOR SHAFT
- REAR
217 COVER, PUMP
3 BUSHING, OIL PUMP BODY
203 BODY, PUMP 3 BUSHING, OIL PUMP BODY
203 BODY, PUMP
603 BUSHING, REVERSE INPUT CLUTCH
- FRONT
605
HOUSlNG&DRUMASSEMBLY, REVERSE
INPUT CLUTCH
606 BUSHING, REVERSE INPUT CLUTCH
- REAR 603
BUSHING, REVERSE INPUT CLUTCH
- FRONT
605 HOUSING & DRUM ASSEMBLY, REVERSE
INPUT CLUTCH
606 BUSHING, REVERSE INPUT CLUTCH
- REAR
Figure 206 Bushing Replacement Procedure

AUTOMATIC TRANSMISSION 700-R4-61
I PROTECT PARTS WITH WOOD BLOCKS OR CLOTH AS NECESSARY I
657 BUSHING,
INPUT SUN GEAR - FRONT
658 GEAR, INPUT SUN
659 BUSHING,
INPUT SUN GEAR
- REAR --------------
665 BUSHING, REACTION CARRIER SHAFT -
FRONT
666 SHAFT, REACTION CARRIER
667 BUSHING, REACTION CARRIER SHAFT
-
REAR --------------
657
BUSHING, INPUT SUN GEAR - FRONT
658 GEAR, INPUT SUN
659 BUSHING, INPUT SUN GEAR
- REAR --------------
665 BUSHING, REACTION CARRIER SHAFT - FRONT
666 SHAFT, REACTION CARRIER
667 BUSHING, REACTION CARRIER SHAFT
- REAR -----up------
672 BUSHING, REACTION SUN 672 BUSHING, REACTION SUN
673 GEAR, REACTION SUN
JH0170-700R4
Figure 207 Bushing Replacement Procedure