Winnebago 1987-1989 LeSharo Service Manual page 264

GENERAL INFORMATION
PRINCIPLES OF OPERATION
The automatic transmission consists of 3 main sections.
1.
TORQUE CONVERTER
This ensures a FLEXIBLE and AUTOMATIC
connection between the ENGINE and the
CLUTCH/BRAKEASSEMBLY: it is an AUTOMATIC
CLUTCH.
In addition, it multiplies the torque delivered by
the engine when the vehicle starts.
2.
CLUTCH/BRAKE ASSEMBLY
This provides one reverse gear and 3 forward gears
by way of two EPICYCLICGEAR TRAINS. Gear
changes are AUTOMATIC and WITHOUT
INTERRUPTIONin torque transfer. Three types of
unit control the epicyclic gear trains to obtain
these results:
- the MECHANICAL units,
- the HYDRAULIC units,
- the ELECTRICALand ELECTRONIC units
,
]
3.
FINAL DRIVE SECTION
Its purpose and component parts are similar to
those in a mechanical gearbox-final drive
assembly. However, it also includes a change in
the line of drive which is achieved by means of a
pair of external gears known as STEP-DOWN
gears. These step-down gears playa part in the
overall drive reduction.
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