Winnebago 1987-1989 LeSharo Service Manual page 271

GENERAL INFORMATION
COMPONENT DESCRIPTIONS
The automatic transmission selects through the three
forward drive ratios, without disconnecting the
drive.
It consists of three main units:
- the torque converter,
• the differential section,
- the clutch/brake unit.
The Torque Converter
provides a flexible drive from the engine through
to the mechanical section
- acts as an automatic clutch,
- increases the torque output during the starting
phase.
1
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The Differential
This carries the drive from the transmission
mechanism through to the wheels.
It consists of:
- the output train that lowers the drive centerline.
- the ring gear and pinion set that drives the
differential.
The Clutch/Brake Unit
This provides three reduction ratios in forward drive
and one in reverse.
It contains:
• planetary gear train
• the units that control this train which can be
separated into three categories:
- mechanical units
hydraulic units
• electrical units.
Planetary Gear Train
This is a set of helical cut gears that provide the
various ratios (3 forward ratios and 1 reverse ratio)
depending on the way in which the control units
(E1 - E2 • F1 • F2) are selected.
F1·19