Description: Automatic
transmissions/transaxles use an arrangement of internal seals in
clutch packs, servos, and accumulators.
There are also several external seals. These
can usually be found where there are any external linkage connections, where the
torque converter engages the oil pump at the front of
the transmission,
at the
output shaft of the transmission (rear wheel drive), and at
the transaxle drive axle connections (front wheel drive). A gasket is
used between the transmission oil pan and the transmission
housing.
Purpose:
Internal
seals prevent leakage in clutch packs, servos and
accumulators. These components are responsible for applying or absorbing
pressure at various points
inside the transmission/transaxle. External seals prevent the leakage of fluid
outside the transmission/transaxle case and also prevent dirt from entering into
the transmission. The oil pan gasket seals the pan to the
transmission/transaxle case.
Maintenance Tips/Suggestions: Symptoms of internal seal leakage may
include slipping, rough shifts, loss of some gear ranges, or no
vehicle movement in forward or reverse. Symptoms of a leaking
external seal or transmission/transaxle oil pan gasket usually can
be seen as reddish-brown spots in your driveway or parking place, a
burning oil smell from underneath the car, and frequent topping-off
of the transmission fluid level. If your
car shows signs of seal or gasket problems, have the
transmission checked as soon as possible by
a qualified service technician. If the warning signs are neglected,
more serious transmission damage may result.
