Dodge Ram Truck 1500-2500-3500. Manual — part 1684

DISASSEMBLY

1. Remove the snap-ring (1) holding the input annulus (4) into the input carrier (5).

2. Remove the input annulus (4) from the input carrier (5).

3. Remove the number 9 thrust bearing from the reverse planetary carrier. Note that this planetary carrier has four

pinion gears.

4. Remove the reverse planetary gear carrier (7).

5. Remove the number 10 thrust bearing (2) from the input sun gear (6).

6. Remove the input sun gear (6) from the input carrier (5).

7. Remove the number 11 thrust bearing (3) from the input carrier (5).

CLEANING

Clean the planetary components in solvent and dry them with compressed air.

INSPECTION

Check sun gear and driving shell condition. Replace the gear if damaged or if the bushings are scored or worn. The
bushings are not serviceable. Replace the driving shell if worn, cracked or damaged.

Replace planetary gear sets if gears, pinion pins, or carrier are damaged in any way. Replace the annulus gears
and supports if either component is worn or damaged.

Replace the output shaft if the machined surfaces are scored, pitted, or damaged in any way. Also replace the shaft
if the splines are damaged, or exhibits cracks at any location.

Reverse/Input Planetary Carrier Assembly

1 - SNAP-RING

5 - INPUT PLANETARY CARRIER

2 - THRUST BEARING NUMBER 10

6 - INPUT SUN GEAR

3 - THRUST BEARING NUMBER 11

7 - REVERSE PLANETARY CARRIER

4 - INPUT ANNULUS

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ASSEMBLY

NOTE: Clean and inspect all components. Replace any components which show evidence of excessive wear
or scoring.

1. Install the number 11 thrust bearing (3) into the input planetary carrier (5) so that the inner race will be toward

the front of the transmission.

2. Install the input sun gear (6) into the input carrier (5).

3. Install the number 10 thrust bearing (2) onto the rear of the reverse planetary carrier (7) with the inner race

toward the carrier.

4. Install the number 9 thrust bearing onto the front of the reverse planetary carrier (7) with the outer race toward

the carrier and the inner race facing upward.

5. Install the reverse planetary gear carrier (7) into the input carrier (5).

6. Install the input annulus gear (4) into the input carrier (5).

7. Install the snap-ring (1) to hold the input annulus gear (4) into the input carrier (5).

MECHANISM-SHIFT

DESCRIPTION

The gear shift mechanism provides six shift positions which are:

•

Park (P)

•

Reverse (R)

Reverse/Input Planetary Carrier Assembly

1 - SNAP-RING

5 - INPUT PLANETARY CARRIER

2 - THRUST BEARING NUMBER 10

6 - INPUT SUN GEAR

3 - THRUST BEARING NUMBER 11

7 - REVERSE PLANETARY CARRIER

4 - INPUT ANNULUS

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•

Neutral (N)

•

Drive (D)

•

Manual second (2)

•

Manual low (1)

OPERATION

MANUAL LOW (1) range provides first gear only. Overrun braking is also provided in this range. MANUAL SECOND
(2) range provides first and second gear only.

DRIVE range provides FIRST, SECOND, THIRD, OVERDRIVE FOURTH, and OVERDRIVE FIFTH (if applicable)
gear ranges. The shift into OVERDRIVE FOURTH and FIFTH (if applicable) gear ranges occurs only after the trans-
mission has completed the shift into D THIRD gear range. No further movement of the shift mechanism is required
to complete the 3-4 or 4-5 (if applicable) shifts.

The FOURTH and FIFTH (if applicable) gear upshifts occur automatically when the overdrive selector switch is in
the ON position. No upshift to FOURTH or FIFTH (if applicable) gears will occur if any of the following are true:

•

The transmission fluid temperature is below 10° C (50° F) or above 121° C (250° F).

•

The shift to THIRD is not yet complete.

•

Vehicle speed is too low for the 3-4 or 4-5 (if applicable) shifts to occur.

Upshifts into FOURTH or FIFTH (if applicable) will be delayed when the transmission fluid temperature is below 4.5°
C (40° F) or above 115.5° C (240° F).

VALVE-SOLENOID SWITCH

DESCRIPTION

The Solenoid Switch Valve (SSV) is located in the valve body and controls the direction of the transmission fluid
when the L/R-TCC solenoid is energized.

OPERATION

The Solenoid Switch Valve controls line pressure from the LR-TCC solenoid. In 1st gear, the SSV will be in the
downshifted position, thus directing fluid to the L/R clutch circuit. In 2nd, 3rd, 4th, and 5th (if applicable) gears, the
solenoid switch valve will be in the upshifted position and directs the fluid into the torque converter clutch (TCC)
circuit.

When shifting into 1st gear, a special hydraulic sequence is performed to ensure SSV movement into the down-
shifted position. The L/R pressure switch is monitored to confirm SSV movement. If the movement is not confirmed
(the L/R pressure switch does not close), 2nd gear is substituted for 1st. A DTC will be set after three unsuccessful
attempts are made to get into 1st gear in one given key start.

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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 turbine (1), a stator (2), an overrunning clutch,
an impeller (5), and an electronically applied converter
clutch (6). The converter clutch provides reduced
engine

speed

and

greater

fuel

economy

when

engaged. Clutch engagement also provides reduced
transmission fluid temperatures. The torque converter
hub (3) drives the transmission oil (fluid) pump and
contains an o-ring seal (4) to better control oil flow.

The torque converter is a sealed, welded unit that is
not repairable and is serviced as an assembly.

CAUTION: The torque converter must be replaced
if a transmission failure resulted in large amounts
of metal or fiber contamination in the fluid.

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