2006 DODGE RAM SRT-10 Service Repair Manual

power steering brake pads replacement fuse climate settings warning light transmission oil

Page 3057 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual MECHANISM-SHIFT
DESCRIPTION
The gear shift mechanism provides six shift positions which are:
Park (P)
Reverse (R)
Neutral (N)
Drive (D)
Manual second (2)
Manual low (1)
OPERATION
MANUAL LOW (1) range

Page 3058 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual 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 eith

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 direction, 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 asnor-
mally openornormally closed.Thenormally open
solenoid valve is defined as a valve which allows
hydraulic flow when no current or voltage is applied to
the solenoid. Thenormally closedsolenoid 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 transmission 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 pressures found in current transmissions. Fast
response time is also necessary to ensure accurate
control of the transmission.
The strength of the magnetic field is the primary force
that determines the speed of operation in a particular
solenoid design. A stronger magnetic field will cause
the plunger to move at a greater speed than a weaker
one. There are basically two ways to increase the
force of the magnetic field:
1. Increase the amount of current applied to the
coil or
2. Increase the number of turns of wire in the coil.
The most common practice is to increase the number
of turns by using thin wire that can completely fill the
available space within the solenoid housing. The
strength of the spring and the length of the plunger
also contribute to the response speed possible by a
particular solenoid design.
A solenoid can also be described by the method by
which it is controlled. Some of the possibilities include
variable force, pulse-width modulated, constant ON, or
duty cycle. The variable force and pulse-width modu-
lated versions utilize similar methods to control the
current flow through the solenoid to position the sole-
noid plunger at a desired position somewhere
between full ON and full OFF. The constant ON and
duty cycled versions control the voltage across the
1 - MANUAL VALVE
2 - LINE PRESSURE
3 - 2/4 - LOW REVERSE SOLENOID ENERGIZED
4 - UNDERDRIVE SOLENOID DE-ENERGIZED
5 - UNDERDRIVE CLUTCH
1-OVERDRIVECLUTCH
2 - NO VENT
3 - OVERDRIVE SOLENOID ENERGIZED
4 - MANUAL VALVE
5 - LOW REVERSE/CONVERTER CLUTCH SOLENOID DE-
ENERGIZED
6-SOLENOIDSWITCHVALVE
7 - TAPER
8 - VENT TO SUMP
9 - ORIFICE
10 - CHECK BALL

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DODGE RAM SRT-10 2006 Service Repair Manual solenoid to allow either full flow or noflow through the solenoid’s valve.
OPERATION
When an electrical current is applied to the solenoid coil, a magnetic field is created which produces an attract

Page 3060 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual ASSEMBLY-TRANSMISSION SOLENOID/PRESSURE SWITCH
DESCRIPTION
The Solenoid/Pressure Switch Assembly (1) is inside
the transmission and mounted to the valve body
assembly. The assembly consists of four so

ASSEMBLY-TRANSMISSION SOLENOID/PRESSURE SWITCH
DESCRIPTION
The Solenoid/Pressure Switch Assembly (1) is inside
the transmission and mounted to the valve body
assembly. The assembly consists of four solenoids
that control hydraulic pressure to the L/R, 2/4, OD,
and UD friction elements (transmission clutches), and
the torque converter clutch. The reverse clutch is con-
trolled by line pressure from the manual valve in the
valve body. The solenoids are contained within the
Solenoid/Pressure Switch Assembly, and can only be
serviced by replacing the assembly.
The solenoid assembly also contains pressure
switches that monitor and send hydraulic circuit infor-
mation to the TCM. Likewise, the pressure switches
can only be service by replacing the assembly.
OPERATION
SOLENOIDS
The solenoids receive electrical power from the Transmission Control Relay through a single wire. The TCM ener-
gizes or operates the solenoids individually by grounding the return wireof the solenoid needed. When a solenoid
is energized, the solenoid valve shifts, and a fluid passage is opened or closed (vented or applied), depending on
its default operating state. The result is an apply or release of a frictional element.
The 2/4 and UD solenoids are normally applied, which allows fluid to pass throughintheirrelaxedor“off”state.By
design, this allows transmission limp-in (P,R,N,2) in the event of an electrical failure.
The continuity of the solenoids and circuits are periodically tested. Each solenoid is turned on or off depending on
its current state. An inductive spike should be detected by the TCM during this test. If no spike is detected, the
circuit is tested again to verify the failure. In addition to the periodic testing, the solenoid circuits are tested if a
speed ratio or pressure switch error occurs.
PRESSURE SWITCHES
The TCM relies on three pressure switches to monitor fluid pressure in the L/R, 2/4, and OD hydraulic circuits. The
primary purpose of these switches is to help the TCM detect when clutch circuit hydraulic failures occur. The range
for the pressure switch closing and opening points is 11-23 psi. Typicallythe switch opening point will be approxi-
mately one psi lower than the closing point. For example, a switch may closeat 18 psi and open at 17 psi. The
switches are continuously monitored by the TCM for the correct states (open or closed) in each gear as shown in
the following chart:
PRESSURE SWITCH STATES

Page 3061 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual GEAR L/R 2/4 OD
ROPOPOP
P/N CL OP OP
1st CL OP OP
2nd OP CL OP
DOPOPCL
OD OP CL CL
OP = OPEN
CL = CLOSED
A Diagnostic Trouble Code (DTC) will set if the TCM senses any switch open orclosed at the wron

Page 3062 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual 4. Remove Solenoid/Pressure Switch Assembly (1)
and screen from valve body (2).
INSTALLATION
NOTE: If the Solenoid/Pressure Switch assembly is being replaced, the Quick Learn Procedure must be per-
fo

Page 3063 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual CONVERTER-TORQUE
DESCRIPTION
The torque converter is a hydraulic device that cou-
ples the engine crankshaft to the transmission. The
torque converter consists of an outer shell with an
internal turbi

Page 3064 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual IMPELLER
The impeller is an integral part of the converter housing. The impeller consists of curved blades placed radially
along the inside of the housing on the transmission side of the converter. As

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