Page 8 - Hydra-matic 6 Speed RWD Technician's Guide (October 2005)

UNDERSTANDING THE GRAPHICS

FLUID PUMP
TORQUE COVER
CONVERTER ASSEMBLY
HOUSING (219)
(203)
TORQUE
CONVERTER
ASSEMBLY TRANSMISSION
(1) CASE
ASSEMBLY
(7)

CONTROL
VALVE
ASSEMBLY
(21)

FLUID
FILTER
ASSEMBLY
(26)
FLUID
PAN
ASSEMBLY
(29)

Figure 2
The flow of transmission fluid starts in the bottom 3. A graphic schematic representation that displays
pan and is drawn through the filter, and into the oil valves, ball check valves, orifices and so forth,
pump assembly. This is a basic concept of fluid flow required for the proper function of the transmission
that can be understood by reviewing the illustrations in a specific gear range. In the schematic drawings,
provided in Figure 2. However, fluid may pass fluid circuits are represented by straight lines and
between the control valve body, spacer plate, case orifices are represented by indentations in a circuit.
and other components many times before reaching a All circuits are labeled and color coded to provide
valve or applying a clutch. For this reason, the graphics reference points between the schematic drawing
are designed to show the exact location where fluid and the two dimensional line drawing of the
passes through a component and into other passages components.
for specific gear range operation.
Figure 4 (page 7B) provides an illustration of a typi-
To provide a better understanding of fluid flow in cal valve, and valve train components. A brief de-
the Hydra-matic 6 Speed RWD transmission, the scription of valve operation is also provided to sup-
components involved with hydraulic control and fluid port the illustration.
flow are illustrated in three major formats. Figure 3
provides an example of these formats which are: Figure 5 (page 7B) provides a color coded chart that
references different fluid pressures used to operate
1. A three dimensional line drawing of the component
for easier part identification. the hydraulic control systems. A brief description of
how fluid pressures affect valve operation is also
2. A two dimensional line drawing of the component provided.
to indicate fluid passages and orifices.

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