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TURBO HYDRA-MATIC 200
7A1-1
SECTION 7A1
TURBO HYDRA-MATIC (200)
CONTENTS OF THIS SECTION
General Description
................................................
7A1-1
Diagnosis
................................................................
7 ~ 1 - 4
On Car Service
........................................................
7A1-23
Governor
................................................................
7A1-23
Intermediate Servo
...............................................
7A1-23
..................................................
Pressure Regulator
7A1-23
Control Valve Asm
.................................................
7A1-24
Oil Cooler Pipes
......................................................
7A1-24
T.V. Cable
..............................................................
7A1-24
Column Shift Controls
............................................
7A1-25
Console Shift Controls
............................................
7Al-25
Unit Repair
...........................................................
7A1-30
Transmission Removal
..........................................
7A1-30
Transmission Disassembly
.....................................
7A1-3 1
External Parts
.......................................................
7A1-32
...................................................
Front Unit Parts
7A1-35
Front Gear Parts
...................................................
7A1-36
Rear Gear Parts
.....................................................
7A1-39
Manual Shaft
&
Parking Pawl Parts
.......................
7A1-40
................................................
Inspection of Case
7A1-41
Low and Reverse Clutch
.......................................
7A1-47
Oil Pump
..............................................................
7A1-58
Pressure Regulator
................................................
7A1-59
Pump Body
...........................................................
7A1-6 1
Pump Cover
..........................................................
7Al-63
Intermediate Servo Piston
..................................
7A1-68
...............................................
Control Valve Asm
7A1-70
Bushing Service
.....................................................
7A1-74
Specifications
.........................................................
7A1-81
Special Tools
..........................................................
7A1-82
GENERAL DESCRIPTION
The Turbo Hydra-Matic
200
transmission is a fully
automatic unit consisting primarily of 3-element hydraulic
torque converter and a compound planetary gear set
.
Three
multiple-disc clutches. a roller clutch and a band provide the
friction elements required to obtain the desired function of
the compound planetary gear set
.
The torque converter couples the engine to the planetary
gears
through
oil
and
provides
hydraulic
torque
multiplication when required
.
The compound planetary gear
set produces three forward speeds and reverse
.
The 3-element torque converter consists of a pump or
driving member. a turbine or driven member and a stator
assembly
.
The stator is mounted on a one-way roller clutch
which will allow the stator to turn clockwise but not
counterclockwise
.
The torque converter housing is filled with oil and is
attached to the engine crankshaft by a flex plate and always
rotates at engine speed
.
The converter pump is an integral
part of the converter housing. therefore the pump blades.
rotating at engine speed. set the oil within the converter into
motion and direct it to the turbine. causing the turbine to
rotate
.
As the oil passes through the turbine. it is traveling in
such a direction that if it were not re-directed by the stator
it would hit the rear of the converter pump blades and impede
its pumping action
.
So. at low turbine speeds. the oil is re-
directed by the stator to the converter pump in such a manner
that it actually assists the converter pump to deliver power
or multiply engine torque
.
As turbine speed increases. the direction of the oil
leaving the turbine changes and flows against the rear side
of the stator vanes in a clockwise direction
.
Since the stator
is now impeding the smooth flow of oil. its roller clutch
releases and it revolves freely on its shaft
.
Once the stator
becomes inactive. there is no further multiplication of engine
torque within the converter
.
At this point. the converter is
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