PONTIAC FIERO 1988 Service Repair Manual

700.R4-50 AUTOMATIC TRANSMISSION
366
363
55 #12 CHECKBALL
359 PLUG, CUP (ORIFICE)
360 VALVE, ABUSE
361 SPRING, ABUSE VALVE 73
362 STOP, ABUSE VALVE
363 PIN, SPRING
364 VALVE, LO OVERRUN CLUTCH
365 SPRING, LO OVERRUN CLUTCH VALVE (M6
X
1 X 24)
366 PIN, SPRING VALVE RETAINING
374 BOLT, SPEC. HEX WASHER HEAD
367 PISTON, ACCUMULATOR (M6 X 1 X
16) 369 RING, OIL SEAL ACCUMULATOR PISTON
375 BOLT, HEX HEAD (M6 X 1 X 40)
370 SPRING, ACCUMULATOR PISTON 376 BOLT, HEX HEAD (M6 X 1 X 45) 371 COVER, AUXILIARY ACCUMULATOR VALVE 377 AUXILIARY ACCUM. VALVE BODY ASM.
JH0154-700R4
Figure 18 1 Auxiliary Valve Body Assernbly
Figure 182 Manual Valve Link
64 LINK, THROTTLE LEVER TO CABLE
65 LEVER & BRACKET ASSEMBLY, THROTTLE
69 BOLTS, CONTROL VALVE
ASSEMBLY ~H0065-700R4
Figure 183 T.V. Lever and Bracket
- torque to 22 N.m (18 ft. lbs.)
2. The
1-2 accumulator piston seal (60) onto the 1-2
accumulator piston ((61)
3. The 1-2 accumulator piston (61) into the 1-2
accumulator cover and pin assembly (62)
- the three legs on the piston must face up
toward the case when installed.
4. The 1-2 accumulator spring (59) onto the piston
5. The 1-2 accumulator cover and pin assembly (62)
onto the case
- torque to 11 N*m (8 ft. lbs.)
Install or Connect (Figure 186)
1. filter seal (70)
onto the oil filter
- lubricate with transmission fluid.
2. Oil filter (71)
3. Oil pan gasket (72)
4. Chip magnet (93) into oil pan (73)
5. Oil pan (73) and bolts (74)
- torque to 16 N.m (12 ft. Ibs.)

A WASHER WlRE RETAINER
50 SOLENOID ASSEMBLY
51 BOLT, HEX WASHER HEAD (SOLENOID)
63 BOLT, ACCUMULATOR COVER
66 CLIP, ELECTRICAL WlRE
69 BOLT, VALVE BODY
75 BOLT, MANUAL DETENT SPRING
87 CLIP, FILTER RETAINER
92 CONDUIT, SOLENOID WlRE
374 BOLT, SPEC. HEX WASHER HEAD
(M6 X 1 X
18)
375 BOLT, HEX HEAD (M6 X 1 X 35)
376 BOLT, HEX HEAD (M6 X 1 X 45) JH0064-700-R4
Figure 184 Valve Body Bolt Locations
ILL. .
NO. DESCRIPTION
A WASHER, WlRE RETAINING
33 CONNECTOR, ELECTRICAL
96 TUBE, AUXILIARY ACCUMULATOR VALVE
97 CLAMP, TUBE
374 BOLT, SPECIAL HEX HEAD (M6 X
1 X 16)
375 BOLT, HEX HEAD (M6 X 1 X 35)
376 BOLT, HEX HEAD (M6 X 1 X 45)
377 AUXILIARY ACCUM. VALVE BODY ASM.
710 BRACKET, PARKING LOCK
71 5 BOLT, PARKING LOCK BRACKET
JH0067-700R4
AUTOMATIC TRANSMISSION 700-R4-51
10 CASE, TRANSMISSION
70 SEAL, FILTER
7
1 FILTER ASSEMBLY, TRANSMISSION OIL
72 GASKET, TRANSMISSION OIL PAN
73 PAN, TRANSMISSION OIL
74 SCREW, SPEC. HEX WASHER HEAD (PAN)
93 MAGNET, CHIP COLLECTOR
JH0155-700R4
Figure 186 Case, Pan and Filter Assembly
2-4 Servo Assembly
Measure (Figure 187)
TOOLS REQUIRED:
J-33037 Band Apply Pin Tool
1. Install
J-33037 as
shown with apply pin (29).
2.
Apply 11.0 N-m (100 in. Ibs.) torque.
3. If
white line "A" appears in the gage slot
"B", pin
length is correct.
4. Use pin selection chart to determine the correct
pin length.
Inspect
a Pistons for
- porosity or damage
- ring groove damage
Cover (15) for porosity or damage
Seals for
- nicks or cuts
- freeness in the seal groove
a Springs for distortion
e Pin for wear or burrs
Important
Check servo bore in the case for any wear which
may cut the servo seals.
~'~ure 185 Outside Electrical Connector

700-R4-52 AUTOMATIC TRANSMISSION
A. WHITE LINE B. GAGE SLOT
Figure 187 Servo Pin Length
Measure (Figure 188)
TOOLS REQUIRED:
Vernier Calipers
Scale
1. Measure Piston (25) Dimension
*A
2.
Measure housing (22) Dimension **B
3. Check Model Application
Assemble (Figures 189, 190, 191 and 192)
TOOLS REQUIRED:
5-22269-01
J-297 14
1. Cushion spring (26) into the 2nd apply piston
(25)
2. Cushion spring retainer (27) on the cushion
spring
3. Install J-22269-01.
- compress the retainer past the snap ring
groove in the 2nd apply piston.
- install the retainer ring (28).
4. The 2nd apply piston (25) onto the apply pin (29)
- retainer goes toward the shoulder of the pin.
5. Servo apply pin spring (20) on the pin
6. Servo apply pin washer (19) and retaining clip
(18)
7. Inner (23) and outer (24) seals on the 2nd apply
piston
- retain with petrolatum.
8. "0" ring seal (21) on servo piston housing
2ND APPLY PISTON & HOUSING APPLICATION
MODEL I DIMt!SION DIMENSION I **B I
I YAM, YOM, YMM I
MLM, MRM,MTM,MXM, PRM,TAM,TBM,
22 HOUSING, SERVO PISTON (INNER)
25 PISTON, 2ND APPLY
JH0156-700R4
Figure 188 2nd Apply Piston and Housing
Measurement
9. Servo piston inner housing (22) on the 2nd apply
piston
10. Seal ring (17) onto the 4th apply piston
11. The 4th apply piston (16) onto the apply pin
12. Return spring (31) on the pin
13. Servo piston assembly into the servo bore
14.
"0" ring seal (14) on the servo cover
- lubricate the seal with transmission fluid.
15. Servo cover (15) into the servo bore
16. Install J-297 14.
- compress the servo cover.
- install the retainer ring (13)
Governor Assembly
Inspect (Figure 193)
e Valve for free operation
e Weights for free operation
e Springs - missing or distorted
Sleeve for nicks, burrs, scored or galled
o Driven gear for damage

ILL.
NO. DESCRlPTlON
13 RING, SERVO COVER RETAINING
14 SEAL, "0" RlNG (2-4 SERVO COVER)
15 COVER, 2-4 SERVO
16 PISTON. 4TH APPLY
17 RING, 811- SEAL (4TH APPLY PISTON)
(OUTER)
18 RING, RETAINER (APPLY PIN) 19 WASHER, SEWVO APPLY PIN
20 SPRING, SERVO APPLY PIN
21 SEAL, "0" RlNG 22 HOUSING, SERVO PISTON (INNER)
23 RING, OIL SEAL (2ND APPLY PISTON)
(INNER)
24 RING, OIL SEAL (2ND APPLY PISTON)
(OUTER)
29 PIN, ~NB APPLY PISTON
31 SPRING, SERVO RETURN
JH0058-700R4
AUTOMATIC TRANSMISSION 700-R4-53
SECOND APPLY PISTON ASM.
Figure
190 2nd Servo Piston - Assembly
Disassemble
DO NOT DISASSEMBLE EXCEPT, FOR
CLEANING
OR PART REPLACEMENT.
1. Cut off one end of each governor weight pin.
2. Pins (84)
3. Weights
4. Valve
5. Driven gear (83)
- Drive out the retainer pin (82) with a small
punch.
- Support the governor assembly sleeve on
plates installed in the exhaust slots. Push
out the gear with an arbor press and a long
punch.
e Wash all parts in solvent.
Air dry and blow out passages.
Assemble
1. Install a new governor drive gear.
- support the governor or plates through the
exhaust slots.
- press gear (83) into the sleeve until seated.
- drill a new retaining pin hole in the sleeve
ninety degrees from the existing hole. Use a
3.0
mm (1/8 in.) drill.
- Install retainer pin (82) and stake.
2. Valve into the sleeve
3. Weights, springs, and thrust cap onto the
governor assembly
4. Retaining
pins (84) into the thrust cap (85) and
governor assembly
5. Stake the retaining pins (84).
6. Check for free operation of the valve and weights.
Figure 189 2-4 Servo Assembly

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