Dodge RAM 1500 1998 Owner's Manual page 2096

DR
TOW/HAUL OVERDRIVE SWITCH (Continued)
(2) Pull the switch outwards to release it from the
connector in the lever (Fig. 108)
Fig. 108 Remove the Tow/Haul Overdrive Off Switch
INSTALLATION
NOTE: There is enough slack in the wire to pull out
the connector from the lever.
(1) Pull the connector out of the lever just enough
to grasp it.
CAUTION: Be careful not to bend the pins on the
tow/haul overdrive off switch. Use care when
installing the switch, as it is not indexed, and can
be accidentally installed incorrectly.
(2) Install the tow/haul overdrive off switch into
the connector (Fig. 109)
Fig. 109 Install the Tow/Haul Overdrive Off Switch
(3) Push the tow/haul overdrive off switch and wir-
ing into the shift lever.
(4) Install the tow/haul
retainer onto the shift lever.
AUTOMATIC TRANSMISSION - 45RFE/545RFE
overdrive off switch
PISTONS
DESCRIPTION
There are several sizes and types of pistons used in
an automatic transmission. Some pistons are used to
apply clutches, while others are used to apply bands.
They all have in common the fact that they are
round or circular in shape, located within a smooth
walled cylinder, which is closed at one end and con-
verts fluid pressure into mechanical movement. The
fluid pressure exerted on the piston is contained
within the system through the use of piston rings or
seals.
OPERATION
The principal which makes this operation possible
is known as Pascal's Law. Pascal's Law can be stated
as: "Pressure on a confined fluid is transmitted
equally in all directions and acts with equal force on
equal areas."
PRESSURE
Pressure (Fig. 110) is nothing more than force (lbs.)
divided by area (in or ft.), or force per unit area.
Given a 100 lb. block and an area of 100 sq. in. on
the floor, the pressure exerted by the block is: 100
lbs. 100 in or 1 pound per square inch, or PSI as it is
commonly referred to.
Fig. 110 Force and Pressure Relationship
21 - 393