Winnebago 1987-1989 LeSharo Service Manual page 273

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GENERAL INFORMATION
COMPONENT DESCRIPTIONS
THE FLUID PUMP
The fluid pump is an internal gear type, driven
directly by the engine through the torque converter
flange plate. It provides the pressurized fluid
required:
- to feed the converter,
- to lubricate the gears,
- to control the brakes and clutches.
VACUUM CAPSULE (22)
The vacuum capsule is located on the side of the
transmission case. Its function is to regulate
transmission fluid pressure according to engine
load, which is indicated by engine manifold
vacuum.
HYDRAULIC CONTROL UNIT OR VALVE BODY (23)
The valve body is an integral part of the
transmission assembly and is located between the
main case and the fluid pan. The valve body
distributes hydraulic fluid to the proper clutches
and brakes to provide gear selection according to
the positions of the pilot valves.
FREE WHEEL
The free wheel permits torque to be transferred to
the drive wheels while under engine load but
allows a free-wheel or "coasting" effect under
no-load conditions. The exception is that, in 1st
gear, the free wheel locks to provide engine
braking during deceleration.
CLUTCHES (E1
&
E2) and BRAKES (F1
&
F2)
The clutches and brakes are multi-disc, oil-bath
type. The different gears are determined by
application of clutches and brakes in various
combinations according to fluid distribution from
the valve body.
F 1-21
22
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