Dodge RAM TRUCK 1500 1995 Service Manual page 1384

B R
42RH/46RH/47RH AUTOMATIC TRANSMISSION 21 -101
The sensor is used'with all automatic transmissions
equipped with a factory installed auxiliary cooler.
The sensor constantly monitors transmission fluid
temperature. The sensor is in circuit with the over­
drive and converter clutch solenoids through the
power train controller.
The temperature sensor prevents overdrive and
converter clutch engagement when fluid temperature
is below 60°F for the overdrive clutch; and below
70°F for the converter clutch.
The sensor will also downshift the transmission to
third gear, or prevent a 3-4 upshift when fluid tem­
perature exceeds 270-275° F.
The fluid temperature switch is located in a boss
built into the cooler outlet line. The boss and switch
are located approximately 2-3 inches from the outlet
line fitting in the transmission case.
The fluid temperature indicator lamp is in the in­
strument cluster adjacent to the heater/defroster con­
trols (Fig. 4).
TRANSMISSION^FLUSD
COOLER
LINES
J9421-240
Fig. 3 Temperature Sensor Location
TRANSMISSION IDENTIFICATION
Transmission identification numbers and codes are
stamped on the left side of the case just above the oil
pan gasket surface (Fig. 5).
The first letter/number group is the assembly part
number. The next number group the transmission
build date. The last number group is the transmis­
sion serial number. Refer to this information when
ordering replacement parts.
FOURTH GEAR OVERDRIVE COMPONENTS
42RH/46RH/47RH models have three transmission
shafts. An intermediate shaft is positioned between
the input and output shafts. The output shaft is in
the overdrive unit. The intermediate shaft is sup­
ported by the overdrive piston retainer and piloted in
the output shaft.
The overdrive piston and retainer are located at
the rear of the transmission case. The retainer serves
WATER WAIT T R A N S ' *
H y f I N TO TEMP
FUEL START
TRANSMISSION
FLUID
TEMPERATURE
INDICATOR
LAMP
J9521-197
Fig. 4 Fluid Temperature Indicator Lamp Location
PART
NUMBER
BUILD
DATE
SERIAL"""
NUMBER
J9121-202
Fig. 5 Identification Number And Code Location (All)
as both the rear support and pressure chamber for
the overdrive piston. The intermediate shaft is
splined to the overdrive planetary assembly and
overrunning clutch.
The governor components and speedometer drive
are located on the output shaft. Two bearings are
used to support the output shaft. A longer park rod
assembly is also required.
There are no rotating seal rings or pressurized oil
for the direct clutch. The clutch is applied by spring
pressure
The governor is operated by fluid pressure supplied
through pressure tubes. The tubes are permanently
attached to the governor support. Governor pressure
and overdrive clutch pressure taps are provided in
the transmission case for pressure testing purposes.