Adjustments - Shift Mechanism; Solenoid Description - Chrysler Vehicle User Manual

21 - 166 AUTOMATIC TRANSMISSION - 42RLE
SHIFT MECHANISM (Continued)
(3) With floor shift lever handle push-button not
depressed and lever in:
(a) PARK position - Apply forward force on cen-
ter of handle and remove pressure. Engine starts
must be possible.
(b) PARK position - Apply rearward force on cen-
ter of handle and remove pressure. Engine starts
must be possible.
(c) NEUTRAL position - Normal position. Engine
starts must be possible.
(d) NEUTRAL position - Engine running and
brakes applied, apply forward force on center of
shift handle. Transmission shall not be able to shift
from NEUTRAL to REVERSE.

ADJUSTMENTS - SHIFT MECHANISM

Check adjustment by starting the engine in PARK
and NEUTRAL. Adjustment is CORRECT if the
engine starts only in these positions. Adjustment is
INCORRECT if the engine starts in one but not both
positions. If the engine starts in any position other
than PARK or NEUTRAL, or if the engine will not
start at all, the TRS may be faulty.
Gearshift Adjustment Procedure
(1) Shift transmission into PARK.
(2) Remove floor console as necessary for access to
the shift cable adjustment. (Refer to 23 - BODY/IN-
TERIOR/FLOOR CONSOLE - REMOVAL)
(3) Loosen the shift cable adjustment nut.
(4) Raise vehicle.
(5) Unsnap cable eyelet from transmission shift
lever.
(6) Verify transmission shift lever is in PARK
detent by moving lever fully rearward. Last rearward
detent is PARK position.
(7) Verify positive engagement of transmission
park lock by attempting to rotate propeller shaft.
Shaft will not rotate when park lock is engaged.
(8) Snap cable eyelet onto transmission shift lever.
(9) Lower vehicle
(10) Tighten the shift cable adjustment screw to 12
N·m (105 in.lbs.).
(11) Verify correct operation.
(12) Install any floor console components removed
for access. (Refer to 23 - BODY/INTERIOR/FLOOR
CONSOLE - INSTALLATION)
SOLENOID
DESCRIPTION
The typical electrical solenoid used in automotive
applications is a linear actuator. It is a device that
produces motion in a straight line. This straight line
motion can be either forward or backward in direc-
tion, and short or long distance.
A solenoid is an electromechanical device that uses
a magnetic force to perform work. It consists of a coil
of wire, wrapped around a magnetic core made from
steel or iron, and a spring loaded, movable plunger,
which performs the work, or straight line motion.
The solenoids used in transmission applications
are attached to valves which can be classified as nor-
mally open (Fig. 235) or normally closed (Fig.
236). The normally open solenoid valve is defined
as a valve which allows hydraulic flow when no cur-
rent or voltage is applied to the solenoid. The nor-
mally closed solenoid valve is defined as a valve
which does not allow hydraulic flow when no current
or voltage is applied to the solenoid. These valves
perform hydraulic control functions for the transmis-
sion and must therefore be durable and tolerant of
dirt particles. For these reasons, the valves have
hardened steel poppets and ball valves. The solenoids
operate the valves directly, which means that the
solenoids must have very high outputs to close the
valves against the sizable flow areas and line pres-
sures found in current transmissions. Fast response
time is also necessary to ensure accurate control of
the transmission.
Fig. 235 2/4 - Low Reverse and Underdrive
Solenoids
1 - MANUAL VALVE
2 - LINE PRESSURE
3 - 2/4 - LOW REVERSE SOLENOID ENERGIZED
4 - UNDERDRIVE SOLENOID DE-ENERGIZED
5 - UNDERDRIVE CLUTCH
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