Rear cluch not working
Depends on what model and components you have:
{ ...
ENGINE TORQUE DISTRIBUTION – DIRECTING THE FLOW
OF POWER
In an all-wheel-drive vehicle, engine power can be
directed to all four wheels. Subaru Symmetrical AWD differs slightly
from model to model in how it directs power to the wheels, depending on
its transmission.
MODELS
WITH FIVE-SPEED MANUAL TRANSMISSION – CONTINUOUS ALL-WHEEL DRIVE:
A viscous-type locking center differential and limited-slip rear
differential help distribute torque – normally configured at a 50/50
split front to rear. If wheel speed differs between front and rear
axles, the center and/or rear differentials lock up to help distribute
power to the wheels with the most traction.
MODELS
WITH FOUR-SPEED AUTOMATIC TRANSMISSIONS – ACTIVE ALL-WHEEL DRIVE:
An electronically controlled variable transfer clutch and limited-slip
rear differential distribute power to where traction is needed. Sensors
monitor parameters such as wheel slippage, throttle position, and
braking to help determine torque distribution and direct it to the
wheels with optimum traction.
MODELS
WITH FIVE-SPEED AUTOMATIC TRANSMISSION – VARIABLE TORQUE DISTRIBUTION
ALL-WHEEL DRIVE: As with Active All-Wheel Drive, an
electronically controlled variable transfer clutch distributes power,
but through a planetary-type center differential and a viscous-type
limited-slip rear differential. Torque distribution is normally
configured at a performance-oriented rear-wheel-biased 45/55 split front
to rear. Sensors monitor the same parameters as for Active All-Wheel
Drive.
WRX STI,
WITH SIX-SPEED MANUAL TRANSMISSION – DRIVER CONTROLLED CENTER
DIFFERENTIAL (DCCD) ALL-WHEEL DRIVE: The STI uses an
electronically managed multi-plate transfer clutch and a mechanical
limited-slip differential in conjunction with a planetary-gear-type
center differential to control power distribution between the front and
rear wheels. Featuring manual and three automatic modes, DCCD is
normally configured at a 41/59 split front to rear. Sensors monitor
parameters such as wheel slippage, steering angle, throttle position,
and braking to help determine torque distribution and direct it to the
wheels with optimum traction. DCCD also features a limited-slip helical
front and Torsen® rear differential. ... }
And what are the symptoms? How do you know the coupling to the rear is not working?
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