Pontiac FIREBIRD 1972 Service Manual page 988

SECTION 7F
T W O SPEED AUTOMATIC (M-35) TRANSMISSION
CONTENTS OF THIS SECTION
....................................................
Trouble Diagnosis 7F- 1
................................................
General Description 7F-5
................................................
Torque Converter 7F-5
Oil Pump
..............................................................
7F-7
Oil Cooler
............................................................
7F-7
High Clutch
.......................................................
7F-7
Low Band
.........................................................
7F-7
Planet Carrier
......................................................
7F-8
Reverse Clutch
...................................................
7F-8
Governor
..............................................................
7F-8
Valve Body
..........................................................
7F-9
Oil Fill
..............................................................
7F- 10
Power Flow
........................................................
7F- 10
Hydraulic Components and Operation
............
7F-1 1
Hydraulic Unit Operation
Manual Valve . Neutral 'or Park Range
..........
7F- 16
Drive Range . Low Gear
..................................
7F-16
Drive Range . High Gear
................................
7F.16
.
Automatic Upshifts
............................................
7F-20
Automatic Downshifts
......................................
7F-21
High Speed Downshift Timing Valve
..............
7F-21
Low Range
........................................................
7F-22
Drive to Low Range Downshift
......................
7F-22
Reverse Range
..................................................
7F-22
Periodic Service Recommendations
Towing
................................................................
7F-24
Transmission Fluid
............................................
7F-24
Operations Not Requiring Removal of Transmission
Low Band
..........................................................
7F-26
Column Shift Controls
......................................
7F-26
Console Shift Controls
......................................
7F-26
Throttle Valve Linkage
......................................
7F-27
Neutralizer Switch
............................................
7F-30
Other Service Operations
..................................
7F-31
Removal and Disassembly of Transmission
........
7F-3 1
......................................
Removal of Converter 7F-31
Removal of Speedometer Drive and Driven
Gears. Extension Housing. Governor and
..........................................
Governor Support 7F-3 1
Removal of Internal Components
....................
7F-32
Removal of Oil Pan. Vacuum Modulator and
....................................................
Valve Body 7F-33
Overhaul and Inspection
Converter Assembly
..........................................
7F-34
Vacuum Modulator Assembly
..........................
7F-35
Speedometer Driven Gear Assembly
................
7F-35
Extension Housing Assembly
............................
7F-35
Governor Assembly
..........................................
7F-35
Governor Support Assembly
............................
7F-36
Valve Body Assembly
........................................
7F-36
Oil Pump Oil Seal
..............................................
7F-38
Oil Pump Assembly
..........................................
7F-39
Clutch Drum Assembly
....................................
7F-40
Low Brake Band Assembly
..............................
7F-42
Planet Carrier Assembly and Input Shaft
........
7F-42
Transmission Case
...........................................
7F-43
Transmission Reassembly
Installing Internal Components
........................
7F-44
Installing Servo. Low Band and Oil Pump
......
7F-46
Installing Governor and Support. Speedometer
Gears and Extension Housing
......................
7F-48
Throttle Valve Adjustment
................................
7F-48
Installing Valve Body. Modulator and Oil
Pan
..................................................................
7F-48
Installing Converter
..........................................
7F-49
Installing Transmission
......................................
7F-50
Specifications
Transmission Identification
..............................
7F-50
Torque
................................................................
7F-50
Special Tools
.........................................................
7F-51
TROUBLE DIAGNOSIS
Four basic pressure checks are used for trouble diagnosis
All checks should be made only after thoroughly warming
and operational checks for the two speed automatic
up the transmission
.
(M-35) transmission:
Make pressure gauge hose connection at low servo apply
I
.
Wide Open Throttle Upshift Pressure Check
pressure (mainline) test point. run hose into driver's com-
partment by pushing aside lower steering column jacket
seal (hose out of way of the driver's feet) and connect to
11
.
"Drive" Range Overrun (Coast) Pressure Check
Pressure Gauge 55907
.
With pressure gauge installed. per-
form the following preliminary steps:
III."Drive" Range Idle Pressure Check
.,
IV
.
"Low" Range Pressure Check
1
.
Establish pressure gauge indicator needle rest posi-
tion at "zero" pressure
.