Transmission Housing

to the reverse-range planetary carrier and rotates

b. output Shaft (fig. 2-1). The transmission

with it. Since the carrier is splined to the trans-

output shaft (33) is an integral part of the low-

mission output shaft, rear governor pressure is

range planetary carrier and output shaft assembly.

proportional to transmission output speed. The rear

The carrier is the large, front portion of the

governor functions only during vehicle forward

assembly. The shaft is splined for approximately

movement. Rear governor pressure is called G2

one half its length at the rear. The reverse-range

pressure.

planetary carrier assembly (37), speedometer drive

g-ear (34), and the output drive flange (35) are

2-8. Transmission Housing

splined to the shaft. A bushing at the front supports

The transmission housing (31, fig. 2-1) is an

the rear of the turbine shaft (59).

alum inure casting. The one-piece housing is

2-11. Oil Transfer Plate, Valve Body, and

machined to provide a mounting which mates with

Controls

either the engine flywheel housing or a mounting

face on a transfer housing. It is open at the front

a. Oil Transfer Plate (fig. 2-1). A cast aluminum

and machined internally to receive all of the range

plate (50), bolted to the bottom of the transmission

gearing and clutches, and rear oil pump. Openings

housing (31), provides a mounting for the control

are provided at each side, with machined pads for

valve body assembly (48). Holes and passages in

mounting power takeoff units. The bottom of the

the transfer plate route oil flow and pressure

housing is machined for the oil transfer plate and

between the transmission housing and various

oil pan.

valves in the valve body. A secondary function of

the oil transfer plate is the retention of the two

2-9. Oil Filter and Oil Pan

range clutch anchor pins.

a. Oil Filter Components (fig. 2-1). A pressed

b. Control Value Body Assembly (fig. 2-1). The

steel oil filter can assembly (55) is bolted beneath

control valve body assembly (48) is mounted on the

the valve body assembly (48). This assembly

oil transfer plate (50) within the oil pan (42). The

encloses a throw-away filter element assembly. Oil

assembly includes a system of valves and control

enters the can assembly through a horizontal

devices, all of which operate automatically with the

pickup tube located near the bottom of the oil pan.

exception of the manual selector valve and throttle

Oil, after passing from the outside to the inside of

valve (TV). Pressure regulation, shifts between

the filter element, leaves the can assembly through

ranges, lockup control, and clutch apply regulation

tubes (4.5 and 57) leading to the front and rear oil

are the functions of this assembly.

pumps. The filter element is accessible from the

c. Manual Controls. The manual selector valve

left-front side of the oil pan.

and throttle valve in the control valve body

b. Transmission Oil Pan (fig. 2-1). The oil pan

assembly are actuated by two lever and shaft

(42) is pressed steel and serves as the transmission

assemblies. The levers are inside the oil pan area.

oil sump. It is attached to the bottom of the

The shafts are integral with the levers and extend

transmission housing by 26 bolts which pass

through a single opening to the outside of the

through a flared rim. The oil pane encloses an oil

transmission housing at the left side. The selector

filter (55) and can, control valve assembly (48),

valve shaft is the larger and is hollow. The small

and oil transfer plate (50). Fittings are provided for

throttle valve (TV) shaft is solid, and passes

the oil filler, drain plug, and for retaining the oil

through the hollow center of the selector valve

filter element.

shaft. Seal rings prevent oil leakage. Snap rings

2-10. Transmission Shafts

retain the shafts. Splines at the outer ends of the

a. Converter Turbine Shaft (fig. 2-1). The

shafts provide points for attaching external control

transmission has two shafts which transmit all

levers.

torque. The turbine shaft (59) is the longer shaft. It

d. operation of Value Body and Controls.

is splined at both ends and has drilled passages.

Because of the importance and complexity of the

The front passage directs lockup pressure to the

valve body and controls, and their interrelation

lockup clutch. The rear passage carries lubricating

with other components of the transmission, a

oil. The converter turbine (6) is splined to the front

separate section in this chapter is devoted to the

of the shaft. The high-range clutch housing (16),

hydraulic system. Refer to paragraphs 2-12

intermediate-range sun gear (53), and the low-

through 2-21.

range sun gear (46) are splined to the rear. The

turbine shaft transmits torque from the turbine to

the range-gear section of the transmission.

2-6