Dodge Ram Truck 1500-2500-3500. Manual — part 1795

16. Turn planetary geartrain over. Position wood block

under front end of intermediate shaft and support
geartrain on shaft. Be sure all geartrain parts
have moved forward against planetary snap-ring.
This is important for accurate end play check.

17. Check planetary geartrain end play with feeler

gauge (3). Insert gauge between rear annulus
gear (2) and shoulder on intermediate shaft (1) as
shown. End play should be 0.15 to 1.22 mm
(0.006 to 0.048 in.).

18. If end play is incorrect, install thinner/thicker plan-

etary snap-ring as needed.

CLUTCH-REAR

DESCRIPTION

The rear clutch assembly is composed of the rear clutch retainer (1), pressure plate (8), clutch plates (12), driving
discs (9), piston (15), Belleville spring (7), and snap-rings (10). The Belleville spring acts as a lever to multiply the
force applied on to it by the apply piston. The increased apply force on the rear clutch pack, in comparison to the

Rear Clutch Components

1 - REAR CLUTCH RETAINER

11 - REACTION PLATE

2 - TORLON™ SEAL RINGS

12 - CLUTCH PLATES

3 - INPUT SHAFT

13 - WAVE SPRING

4 - PISTON RETAINER

14 - SPACER RING

5 - OUTPUT SHAFT THRUST WASHER

15 - PISTON

6 - INNER PISTON SEAL

16 - OUTER PISTON SEAL

7 - PISTON SPRING

17 - REAR SEAL RING

8 - PRESSURE PLATE

18 - FIBER THRUST WASHER

9 - CLUTCH DISCS

19 - RETAINING RING

10 - SNAP-RING (SELECTIVE)

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front clutch pack, is needed to hold against the greater torque load imposed onto the rear pack. The rear clutch is
directly behind the front clutch and is considered a driving component.

NOTE: The number of discs and plates may vary with each engine and vehicle combination.

OPERATION

To apply the clutch, pressure is applied between the clutch retainer and piston. The fluid pressure is provided by the
oil pump, transferred through the control valves and passageways, and enters the clutch through the hub of the
reaction shaft support. With pressure applied between the clutch retainer and piston, the piston moves away from
the clutch retainer and compresses the clutch pack. This action applies the clutch pack, allowing torque to flow
through the input shaft into the driving discs, and into the clutch plates and pressure plate that are lugged to the
clutch retainer. The waved spring is used to cushion the application of the clutch pack. The snap-ring is selective
and used to adjust clutch pack clearance.

When pressure is released from the piston, the spring returns the piston to its fully released position and disen-
gages the clutch. The release spring also helps to cushion the application of the clutch assembly. When the clutch
is in the process of being released by the release spring, fluid flows through a vent and one-way ball-check-valve
located in the piston. The check-valve is needed to eliminate the possibility of plate drag caused by centrifugal force
acting on the residual fluid trapped in the clutch piston retainer.

DISASSEMBLY

1. Remove fiber thrust washer (18) from forward side of clutch retainer (1).

2. Remove input shaft front and rear seal rings (2).

3. Remove selective clutch pack snap-ring (10).

Rear Clutch Components

1 - REAR CLUTCH RETAINER

11 - REACTION PLATE

2 - TORLON™ SEAL RINGS

12 - CLUTCH PLATES

3 - INPUT SHAFT

13 - WAVE SPRING

4 - PISTON RETAINER

14 - SPACER RING

5 - OUTPUT SHAFT THRUST WASHER

15 - PISTON

6 - INNER PISTON SEAL

16 - OUTER PISTON SEAL

7 - PISTON SPRING

17 - REAR SEAL RING

8 - PRESSURE PLATE

18 - FIBER THRUST WASHER

9 - CLUTCH DISCS

19 - RETAINING RING

10 - SNAP-RING (SELECTIVE)

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4. Remove the reaction plate (11), clutch discs (9), steel plates (12), pressure plate (8), wave spring (13), spacer

ring (14), and piston spring (7).

5. Remove clutch piston (15) with rotating motion.

6. Remove and discard piston seals (6, 16).

7. Remove input shaft retaining ring (19). It may be necessary to press the input shaft in slightly to relieve tension

on the retaining ring

8. Press input shaft out of retainer with shop press and suitable size press tool. Use a suitably sized press tool to

support the retainer as close to the input shaft as possible.

CLEANING

Clean the clutch components with solvent and dry them with compressed air. Do not use rags or shop towels to dry
any of the clutch parts. Lint from such materials will adhere to component surfaces and could restrict or block fluid
passages after assembly.

INSPECTION

Replace the clutch discs if warped, worn, scored, burned/charred, the lugs are damaged, or if the facing is flaking
off. Replace the top and bottom pressure plates if scored, warped, or cracked. Be sure the driving lugs on the
pressure and clutch plates are also in good condition. The lugs must not be bent, cracked or damaged in any way.

Replace the piston spring and wave spring if either part is distorted, warped or broken.

Check the lug grooves in the clutch retainer. The clutch and pressure plates should slide freely in the slots. Replace
the retainer if the grooves are worn or damaged. Also check action of the check balls in the retainer and piston.
Each check ball must move freely and not stick.

Replace the retainer bushing if worn, scored, or doubt exists about bushing condition.

Inspect the piston and retainer seal surfaces for nicks or scratches. Minor scratches can be removed with crocus
cloth. However, replace the piston and/or retainer if the seal surfaces are seriously scored.

Check condition of the fiber thrust washer and metal output shaft thrust washer. Replace either washer if worn or
damaged.

Check condition of the seal rings on the input shaft and clutch retainer hub. Replace the seal rings only if worn,
distorted, or damaged. The input shaft front seal ring is teflon with chamfered ends. The rear ring is metal with
interlocking ends.

Check the input shaft for wear, or damage. Replace the shaft if worn, scored or damaged in any way.

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ASSEMBLY

1. Soak clutch discs in transmission fluid while

assembling other clutch parts.

2. Install new seal rings on clutch retainer hub and

input shaft if necessary.

a. Be sure clutch hub seal ring is fully seated in

groove and is not twisted.

3. Lubricate splined end of input shaft and clutch

retainer with transmission fluid. Then partially press
input shaft (1) into retainer (2). Use a suitably sized
press tool to support retainer as close to input shaft
as possible.

4. Install input shaft retaining ring.

5. Press the input shaft the remainder of the way into

the clutch retainer.

DR/DH

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