2006 DODGE RAM SRT-10 clutch

CLUTCH-FRONT
DESCRIPTION
The front clutch assembly is composed of the front clutch retainer (11), pressure plate, clutch plates (4), clutch discs
(7), clutch piston (2), clutch piston return spring (9), clutch piston spring retainer (3), and snap-rings (5, 8). The front
clutch is the forward-most component in the transmission geartrain and isdirectly behind the oil pump and is con-
sidered a driving component.
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 snap-ring is used to cushion the application ofthe clutch pack.
When pressure is released from the piston, the spring returns the piston toits fully released position and disen-
gages the clutch. The release spring also helps to cushion the applicationof 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 clutch retainer. The check-valve is needed to eliminate thepossibility of plate drag caused by cen-
trifugal force acting on the residual fluid trapped in the clutch piston retainer.
48RE Front Clutch Components
1 - INNER PISTON SEAL 7 - CLUTCH DISCS
2 - CLUTCH PISTON 8 - RETAINER SNAP-RING
3 - CLUTCH PISTON SPRING RETAINER 9 - CLUTCH PISTON SPRINGS
4 - CLUTCH PLATES 10 - OUTER PISTON SEAL
5 - CLUTCH PACK SNAP-RING (WAVED) 11 - FRONT CLUTCH RETAINER
6 - REACTION PLATE

DISASSEMBLY
1. Remove the waved snap-ring, reaction plate, clutch
plates, and clutch discs.
2. Compress clutch piston retainer and piston springs
with Compressor Tool C-3863-A (1).
3. Remove retainer snap-ring and remove compressor
tool.
4. Remove clutch piston springs (9). Note position and number of piston springs for assembly reference.
5. Remove clutch piston (2) from retainer (11) with a twisting motion.
6. Remove and discard clutch piston inner (1) and outer seals (10).
48RE Front Clutch Components
1 - INNER PISTON SEAL 7 - CLUTCH DISCS
2 - CLUTCH PISTON 8 - RETAINER SNAP-RING
3 - CLUTCH PISTON SPRING RETAINER 9 - CLUTCH PISTON SPRINGS
4 - CLUTCH PLATES 10 - OUTER PISTON SEAL
5 - CLUTCH PACK SNAP-RING (WAVED) 11 - FRONT CLUTCH RETAINER
6 - REACTION PLATE

INSPECTION
Inspect the front clutch components. Replace the clutch discs if warped, worn, scored, burned or charred, the lugs
are damaged, or if the facing is flaking off. Replace the steel plates and reaction plate if heavily scored, warped, or
broken. Be sure the driving lugs on the discs and plate are also in good condition. The lugs must not be bent,
cracked or damaged in any way.
Replace the piston springs and spring retainer if either are distorted, warped or broken.
Check the lug grooves in the clutch piston retainer. The steel plates should slide freely in the slots. Replace the
piston retainer if the grooves are worn or damaged. Also check action of thecheck ball in the piston retainer. The
ball must move freely and not stick.
Replace the retainer bushing if worn, scored, or there is any doubt 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 the clutch piston check ball. The ball should be securely in place. Replace the piston if the ball is missing,
or seized in place.
ASSEMBLY
NOTE: The 48RE transmission uses five plates
and discs for the front clutch.
1. Soak clutch discs in transmission fluid.
2. Install new inner piston seal onto the outer diame-
ter of the clutch retainer inner hub.
3. Install new outer seal onto the clutch piston. Be
sure seal lips of both seals face the interior of the
retainer.
4. Lubricate new inner and outer piston seals with
petroleum jelly.
5. Install clutch piston in retainer. Use twisting motion
to seat piston in bottom of retainer. A thin strip of
plastic (about 0.015 - 0.020 in. thick), can be used to guide seals into placeifnecessary.
CAUTION: Never push the clutch piston straight in. This will fold the sealsover causing leakage and clutch
slip. In addition, never use any type of metal tool to help ease the piston seals into place. Metal tools will
cut, shave, or score the seals.
6. Install and position nine clutch piston springs (1).

7. Install spring retainer (3) on top of piston springs (9).
8. Compress spring retainer and piston springs with Spring Compressor C-3863-A.
9. Install spring retainer snap-ring (8) and remove compressor tool.
10. Install clutch plates and discs (4, 7). Five clutch discs, five steel plates and one reaction plate are required.
11. Install reaction plate (6) followed by waved snap-ring (5).
48RE Front Clutch Components
1 - INNER PISTON SEAL 7 - CLUTCH DISCS
2 - CLUTCH PISTON 8 - RETAINER SNAP-RING
3 - CLUTCH PISTON SPRING RETAINER 9 - CLUTCH PISTON SPRINGS
4 - CLUTCH PLATES 10 - OUTER PISTON SEAL
5 - CLUTCH PACK SNAP-RING (WAVED) 11 - FRONT CLUTCH RETAINER
6 - REACTION PLATE

12. Check clutch pack clearance with feeler gauge
(3). Clearance between waved spring and pres-
sure plate should 2.5-4.09 mm (0.098-0.161 in.). If
clearance is incorrect, clutch plates, clutch discs,
snap-ring, or pressure plate may have to be
changed.

SERVO-FRONT
DESCRIPTION
The kickdown servo consists of a two-land piston (3)
with an inner piston (2), a piston rod (7) and guide,
and a return spring (4). The dual-land piston uses seal
rings on its outer diameters and an O-ring for the
inner piston.
OPERATION
The application of the piston is accomplished by applying pressure between the two lands of the piston. The pres-
sure acts against the larger lower land to push the piston downward, allowing the piston rod to extend though its
guide against the apply lever. Release of the servo at the 2-3 upshift is accomplished by a combination of spring
and line pressure, acting on the bottom of the larger land of the piston. Thesmallpistonisusedtocushionthe
application of the band by bleeding oil through a small orifice in the larger piston, diesel engine only. The release
timing of the kickdown servo is very important to obtain a smooth but firm shift. The release has to be very quick,
just as the front clutch application is taking place. Otherwise, engine runaway or a shift hesitation will occur. To
accomplish this, the band retains itsholding capacity until the front clutch is applied, giving a small amount of over-
lap between them.

CLUTCH-OVERDRIVE
DESCRIPTION
The overdrive clutch is composed of the pressure plate (2), clutch plates,holding discs, overdrive piston retainer,
piston, piston spacer, and snap-rings. The overdrive clutch is the forwardmost component in the transmission over-
drive unit and is considered a holding component. The overdrive piston retainer, piston, and piston spacer are
located on the rear of the main transmission case.
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 piston retainer and piston. The fluid pressure is provided by the
oil pump, transferred through the control valves and passageways, and enters the clutch through passages at the
lower rear portion of the valve body area. With pressure applied between the piston retainer and piston, the piston
moves away from the piston retainer and compresses the clutch pack. This action applies the clutch pack, allowing
torque to flow through the intermediate shaft into the overdrive planetary gear set. The overdrive clutch discs are
attached to the overdrive clutch hub while the overdrive clutch plates, reaction plate, and pressure plate are lugged
to the overdrive housing. This allows the intermediate shaft to transfer the engine torque to the planetary gear and
overrunning clutch. This drives the planetary gear inside the annulus, which is attached to the overdrive clutch drum
and output shaft, creating the desired gear ratio. The waved snap-ring is used to cushion the application of the
clutch pack for the 5 disc version of the overdrive clutch. The 6 disc overdrive clutch does not use a waved snap-
ring.
Overdrive Clutch
1 - REACTION PLATE 2 - PRESSURE PLATE

UNIT-OVERDRIVE
REMOVAL
1. Shift transmission into PARK.
2. Raise vehicle.
3. Remove transfer case, if equipped.
4. Mark propeller shaft universal joint(s) and axle pinion yoke, or the companion flange and flange yoke, for align-
ment reference at installation, if necessary.
5. Disconnect and remove the rear propeller shaft, if necessary. (Refer to3 - DIFFERENTIAL & DRIVELINE/PRO-
PELLER SHAFT/PROPELLER SHAFT - REMOVAL)
6. Remove transmission oil pan, remove gasket, drain oil and reinstall pan.
7. If overdrive unit had malfunctioned, or if fluid is contaminated, remove entire transmission. If diagnosis indicated
overdrive problems only, remove just the overdrive unit.
8. Support transmission with transmission jack.
9. Remove bolts (2) attaching overdrive unit (1) to
transmission.
CAUTION: Support the overdrive unit with a jack
before moving it rearward. This is necessary to
prevent damaging the intermediate shaft. Do not
allow the shaft to support the entire weight of the
overdrive unit.
10. Carefully work overdrive unit off intermediate
shaft. Do not tilt unit during removal. Keep it as
level as possible.
11. If overdrive unit does not require service, immedi-
ately insert Alignment Tool 6227-2 in splines of
planetary gear and overrunning clutch to prevent
splines from rotating out of alignment. If misalign-
ment occurs, overdrive unit will have to be disas-
sembled in order to realign splines.
12. Remove and retain overdrive piston thrust bearing. Bearing may remainon piston or in clutch hub during
removal.
13. Position drain pan on workbench.
14. Place overdrive unit over drain pan. Tilt unit to drain residual fluid from case.
15. Examine fluid for clutch material or metal fragments. If fluid contains these items, overhaul will be necessary.
16. If overdrive unit does not require any service, leave alignment tool inposition. Tool will prevent accidental mis-
alignment of planetary gear and overrunning clutch splines.