Page 22 - Hydra-matic 6 Speed RWD Technician's Guide (October 2005)

TORQUE CONVERTER

FLUID FLOW

STATOR
ASSEMBLY
(F)
TURBINE CONVERTER PUMP
ASSEMBLY ASSEMBLY
(E) (G)

Figure 13
Stator roller clutch failure
• Roller clutch freewheeling in both directions • Roller clutch locking up in both directions can • Overheated fluid.
can cause poor acceleration at low speed. cause poor acceleration at high speed.

STATOR ASSEMBLY
The stator assembly is located between the
STATOR pump assembly and turbine assembly, and is
mounted on a one-way roller clutch. This one-
way roller clutch allows the stator to rotate in
one direction and prevents (holds) the stator
from rotating in the other direction. The
function of the stator is to redirect fluid
returning from the turbine in order to assist the
engine in turning the converter pump assembly.
STATOR HELD
CONVERTER FLUID FLOW REDIRECTED
MULTIPLYING At low vehicle speeds, when greater torque is
needed, fluid from the turbine hits the front
side of the stator blades (the converter is
FLUID FLOW multiplying torque). At this time, the one-way
FROM TURBINE roller clutch prevents the stator from rotating
in the same direction as the fluid flow, thereby
redirecting fluid to assist the engine in turning
CONVERTER AT the converter pump. In this mode, fluid leaving
COUPLING SPEED the converter pump has more force to turn the
turbine assembly and multiply engine torque.
STATOR ROTATES
FREELY
As vehicle speed increases and less torque is
required, centrifugal force acting on the fluid
changes the direction of the fluid leaving the
turbine such that it hits the back side of the
stator blades (converter at coupling speed).
When this occurs, the roller clutch overruns
and allows the stator to rotate freely. Fluid is
no longer being redirected to the converter
pump and engine torque is not being multiplied.

Figure 14 13