TM 9-2320-266-34
CHAPTER 4
REPAIR OF THE TRANSMISSION
4-1. General.
4-2. Hydraulic Control System.
The transmission (figures 4-1 and 4-1.1 ) combines a
torque converter and a fully automatic, three-speed gear
various valves which are used in the different gear selector
system. The converter housing and the transmission case
are an integral aluminum casting. The transmission consists
form. The automatic hydraulic control system has four im-
of two multiple disc clutches, an overrunning clutch, two
portant functions to perform. In a general way, the com-
servos and bands, and two planetary gear sets to provide
ponents of any automatic control system may be grouped
three forward ratios and a reverse ratio. The common
into the following basic groups: The pressure supply system,
sun gear of the planetary gear sets is connected to the front
the pressure regulating valves, the flow control valves, and
clutch by a driving shell splined to the sun gear and to the
front clutch retainer. The hydraulic system consists of an
lowing paragraphs.
oil pump and a single valve body which contains all of the
valves except the governor valve.
4-1
Change 2
