Dodge Dakota (R1). Manual — part 653
AUTOMATIC TRANSMISSION - 46RE
TABLE OF CONTENTS
page
page
AUTOMATIC TRANSMISSION - 46RE
STANDARD PROCEDURE . . . . . . . . . . . . . . . . . 282
ALUMINUM THREAD REPAIR. . . . . . . . . . . . . 282
ACCUMULATOR
BANDS
ELECTRONIC GOVERNOR
EXTENSION HOUSING BUSHING
EXTENSION HOUSING SEAL
FLUID AND FILTER
DIAGNOSIS AND TESTING . . . . . . . . . . . . . . . . 325
STANDARD PROCEDURE . . . . . . . . . . . . . . . . . 326
TRANSMISSION FILL . . . . . . . . . . . . . . . . . . . 328
FRONT CLUTCH
FRONT SERVO
GEARSHIFT CABLE
DIAGNOSIS AND TESTING . . . . . . . . . . . . . . . . 334
GEARSHIFT CABLE . . . . . . . . . . . . . . . . . . . . 334
OIL PUMP
OIL PUMP VOLUME CHECK. . . . . . . . . . . . . . 337
OUTPUT SHAFT FRONT BEARING
OUTPUT SHAFT REAR BEARING
OVERDRIVE CLUTCH
OVERDRIVE SWITCH
OVERDRIVE ELECTRICAL CONTROLS . . . . . 345
OVERDRIVE UNIT
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AUTOMATIC TRANSMISSION - 46RE
AN
OVERRUNNING CLUTCH CAM/OVERDRIVE
PISTONS
PLANETARY GEARTRAIN/OUTPUT SHAFT
REAR CLUTCH
REAR SERVO
SHIFT MECHANISM
SOLENOID
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 381
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 382
SPEED SENSOR
THROTTLE VALVE CABLE
TORQUE CONVERTER
TORQUE CONVERTER DRAINBACK VALVE
TORQUE CONVERTER DRAINBACK VALVE . 391
TRANSMISSION RANGE SENSOR
TRANSMISSION RANGE SENSOR (TRS) . . . . 393
TRANSMISSION TEMPERATURE SENSOR
VALVE BODY
AUTOMATIC TRANSMISSION -
46RE
DESCRIPTION
The 46RE (Fig. 1) is a four speed fully automatic
transmissions with an electronic governor. The 46RE
is equipped with a lock-up clutch in the torque con-
verter. First through third gear ranges are provided
by the clutches, bands, overrunning clutch, and plan-
etary gear sets in the transmission. Fourth gear
range is provided by the overdrive unit that contains
an overdrive clutch, direct clutch, planetary gear set,
and overrunning clutch.
The transmission contains a front, rear, and direct
clutch which function as the input driving compo-
nents. It also contains the kickdown (front) and the
low/reverse (rear) bands which, along with the over-
running clutch and overdrive clutch, serve as the
holding components. The driving and holding compo-
nents combine to select the necessary planetary gear
components, in the front, rear, or overdrive planetary
gear set, transfer the engine power from the input
shaft through to the output shaft.
The valve body is mounted to the lower side of the
transmission and contains the valves to control pres-
sure regulation, fluid flow control, and clutch/band
application. The oil pump is mounted at the front of
the transmission and is driven by the torque con-
verter hub. The pump supplies the oil pressure nec-
essary for clutch/band actuation and transmission
lubrication.
AN
AUTOMATIC TRANSMISSION - 46RE
21 - 257
Fig.
1
46RE
T
ransmission
21 - 258
AUTOMATIC TRANSMISSION - 46RE
AN
AUTOMATIC TRANSMISSION - 46RE (Continued)
IDENTIFICATION
Transmission identification numbers are stamped
on the left side of the case just above the oil pan gas-
ket surface (Fig. 2). Refer to this information when
ordering replacement parts.
GEAR RATIOS The 46RE gear ratios are:
1st . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.45:1
2nd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.45:1
3rd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.00:1
4th . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.69:1
Rev. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.21
OPERATION
The application of each driving or holding compo-
nent is controlled by the valve body based upon the
manual lever position, throttle pressure, and gover-
nor pressure. The governor pressure is a variable
pressure input to the valve body and is one of the
signals that a shift is necessary. First through fourth
gear are obtained by selectively applying and releas-
ing the different clutches and bands. Engine power is
thereby routed to the various planetary gear assem-
blies which combine with the overrunning clutch
assemblies to generate the different gear ratios. The
torque converter clutch is hydraulically applied and
is released when fluid is vented from the hydraulic
circuit by the torque converter control (TCC) solenoid
on the valve body. The torque converter clutch is con-
trolled by the Powertrain Control Module (PCM). The
torque converter clutch engages in fourth gear, and
in third gear under various conditions, such as when
the O/D switch is OFF, when the vehicle is cruising
on a level surface after the vehicle has warmed up.
The torque converter clutch will disengage momen-
tarily when an increase in engine load is sensed by
the PCM, such as when the vehicle begins to go
uphill or the throttle pressure is increased. The
torque converter clutch feature increases fuel econ-
omy and reduces the transmission fluid temperature.
Since the overdrive clutch is applied in fourth gear
only and the direct clutch is applied in all ranges
except fourth gear, the transmission operation for
park, neutral, and first through third gear will be
described first. Once these powerflows are described,
the third to fourth shift sequence will be described.
1 - TORQUE CONVERTER
11 - DIRECT CLUTCH
2 - INPUT SHAFT
12 - PLANETARY GEAR
3 - OIL PUMP
13 - OUTPUT SHAFT
4 - FRONT BAND
14 - SEAL
5 - FRONT CLUTCH
15 - INTERMEDIATE SHAFT
6 - REAR CLUTCH
16 - OVERDRIVE OVERRUNNING CLUTCH
7 - PLANETARIES
17 - DIRECT CLUTCH SPRING
8 - REAR BAND
18 - OVERDRIVE PISTON RETAINER
9 - OVERRUNNING CLUTCH
19 - FILTER
10 - OVERDRIVE CLUTCH
20 - VALVE BODY
Fig. 2 Transmission Part And Serial Number
Location
1 - PART NUMBER
2 - BUILD DATE
3 - SERIAL NUMBER
AN
AUTOMATIC TRANSMISSION - 46RE
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AUTOMATIC TRANSMISSION - 46RE (Continued)
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