RAM 3500 HD Truck 2WD L6-6.7L DSL Turbo (2008)
The torque converter activation pressure is not supplied between the converter front cover and lockup piston via passage (3). The lockup clutch (1) and
the plate (2) are therefore disengaged and the lockup function is inactive.
TORQUE CONVERTER LOCKED UP
The torque converter activation pressure is supplied between the converter front cover and lockup piston via passage (3). The lockup clutch (1) and the
plate (2) are therefore engaged and the lockup function is active.
TURBINE
As the fluid that was put into motion by the impeller blades strikes the blades of the turbine, some of the energy and rotational force is transferred into
the turbine and the input shaft. This causes both of them (turbine and input shaft) to rotate in a clockwise direction following the impeller. As the fluid is
leaving the trailing edges of the turbine's blades it continues in a "hindering" direction back toward the impeller. If the fluid is not redirected before it
strikes the impeller, it will strike the impeller in such a direction that it would tend to slow it down.
STATOR
Torque multiplication is achieved by locking the stator's one-way clutch to its shaft. Under stall conditions (the turbine is stationary), the oil leaving the
turbine blades strikes the face of the stator blades and tries to rotate them in a counterclockwise direction. When this happens the one-way clutch of the
stator locks and holds the stator from rotating. With the stator locked, the oil strikes the stator blades and is redirected into a "helping" direction before it
enters the impeller. This circulation of oil from impeller to turbine, turbine to stator, and stator to impeller, can produce a maximum torque multiplication
of about 2.4:1. As the turbine begins to match the speed of the impeller, the fluid that was hitting the stator in such as way as to cause it to lock-up is no
longer doing so. In this condition of operation, the stator begins to free wheel and the converter acts as a fluid coupling.
