Dodge Dakota (R1). Manual

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.

AUTOMATIC TRANSMISSION - 46RE

21 - 257

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

AUTOMATIC TRANSMISSION - 46RE

21 - 259

AUTOMATIC TRANSMISSION - 46RE (Continued)

Dodge Dakota (R1). Manual - part 653