Pontiac Fiero 1988 Service Manual page 742

HYDRAULIC DIAGNOSIS 125C1
SECTION 125C
MD8
AUTOMATIC TRANSAXLE HYDRAULIC
DIAGNOSIS
CONTENTS
GENERAL DESCRIPTION
125C-1
DIAGNOSIS INFORMATION
125C-2
Road Test Procedure
125C-2
Speed Shift Charts
125C-4
Oil Pressure Check Procedure
125C-5
Clutch Application Chart
125C-6
Diagnosis Charts 125C-7
Oil Circuit Charts ..................................... 125C-14
Electrical Wiring Diagrams 125C-36
Torque Converter Clutch Diagnosis ........ 125C-45
Torque Converter Evaluation ................... 125C-45
T O R Q U E C O N V E R T E R -
C A S E C O V E R -
DRIVE S P R O C K E T -
T H R O T T L E L E V E R
AND B R A C K E T A S M . X>
A U X I L I A R Y -
VALVE BODY
S P E E D O M E T E F
D R I V E G E A R
OIL P U M P -
S H A F T
C O N T R O L VALVE
AND
PUMP A S M .
DRIVE LINK A S M
O U T P U T S H A F T
DRIVEN S P R O C K E T -
DRIVEN S P R O C K E T -
S U P P O R T
- P A R K I N G L O C K
A C T U A T O R A S M .
- L O A N D
R E V E R S E
C L U T C H
I N T E R M E D I A T E -
BAND
J H 0 0 3 3 - 1 2 5 C
Figure 1 THM 125C Transaxle
GENERAL DESCRIPTION
The THM 125C transaxle is a fully automatic
unit for front wheel drive and mid-engine rear wheel
drive vehicles, which provides three forward gear
ranges and a reverse.
The major components of this transaxle are: