CHRYSLER VOYAGER 1996 Service Manual

FLUID LEAK DIAGNOSIS
When diagnosing fluid leaks on the Power Transfer
Unit two weep holes are provided to diagnose certainseal leaks. These holes are located on the bottom side
of the assembly (Fig. 6).
If fluid leak is detected from either weep hole, seal
replacement is necessary.Do not attempt to repair
the leak by sealing weep holes,they must be kept
clear of sealants for proper seal operation.
If fluid is leaking from weep hole A (Fig. 6) the
type of fluid leaking will determine which seal needs
to be replaced. If the fluid leaking is red in color
(transmission fluid) this indicates that the Transmis-
sion differential carrier seal should be replaced. If
the fluid leaking is light brown (gear lube) this indi-
cates that the Power Transfer Unit input seal should
be replaced. For replacement of these seals refer to
Power Transfer Unit Service Procedures.
If fluid is leaking from weep hole B (Fig. 6) the
type of fluid leaking will determine which seal is
leaking. If the fluid leaking is red in color (transmis-
sion fluid) this indicates that the input shaft end seal
should be replaced. If the fluid leaking is light brown
(gear lube) this indicates that the half shaft inner
seal and P.T.U. input shaft cover seal should be
replaced. For replacement of these seals refer to
Power Transfer Unit Service Procedures.
Before condemning any seal or gasket be sure that
the rear rocker arm cover on the engine is not the
cause of the oil leak. Oil leaking from the rocker arm
cover is easily mistaken for a leaking Power Transfer
Unit.
REMOVAL AND INSTALLATION
POWER TRANSFER UNIT (P.T.U.)
REMOVAL
(1) Raise vehicle and remove front wheels.
Fig. 3 Seal Location
Fig. 4 Seal Location
Fig. 5 Seal Location
Fig. 6 Weep Hole Locations
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DIAGNOSIS AND TESTING (Continued)

CAUTION: A certain amount of oil will drain out of
the transaxle when the drive shaft is removed.
(2) Remove right front drive shaft. Install a plug
into the right driveshaft seal hole. Refer to Group 2,
Suspension to remove or install wheel hub nut and
right drive shaft.
(3) Mark propeller shaft front flange.
(4) Separate propeller shaft from P.T.U. assembly
(Fig. 7).
CAUTION: Do not let propeller shaft to hang freely.
Damage to the shaft will occur.
(5) Suspend propeller shaft from underbody of
vehicle.
(6) Remove cradle plate (Fig. 8).
(7) Remove the Power Transfer Unit mounting
bracket bolts at the rear of the unit (Fig. 9).
(8) Remove the right outboard support bracket and
bolts near the right axle shaft.(9) Remove the four mounting bolts for the P.T.U.
(Fig. 10) and (Fig. 11).
(10) Remove P.T.U. assembly from vehicle.
Fig. 7 Driveshaft Flange
Fig. 8 Cradle Plate
Fig. 9 Remove Rear P.T.U Bracket Bolts
Fig. 10 P.T.U. Lower Mounting Bolts
Fig. 11 P.T.U. Upper Mounting Bolts
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REMOVAL AND INSTALLATION (Continued)

INSTALLATION
(1) To install, reverse removal procedure. Check
transaxle fluid and P.T.U. fluid and fill to level.
(2) Refer to the Specifications section for the
proper torque specifications.
END COVER SEAL
The Power Transfer Unit must be removed from
the vehicle to perform this operation. Refer to Power
Transfer Unit Removal in this section for procedures.
(1) Remove P.T.U. end cover bolts (Fig. 12).
(2) Gently tap on end cover ears with a hammer to
separate end cover from the case (Fig. 13).
(3) Clean and inspect sealer surfaces.
(4) Apply MopartGasket Maker, Loctite Gasket
Eliminator No.518 or equivalent to sealing surfaces.
(5) Reinstall cover and tighten bolts to 28 N´m
(250 in. lbs.) in the sequence shown in (Fig. 14).
Retighten first bolt after all others are tight.
CAUTION: When end cover is installed be careful
not to damage the P.T.U. Input Shaft Cover Seal.
(6) Reinstall P.T.U. into vehicle.
(7) Check and fill fluids as required.
INPUT SHAFT SEAL
The Power Transfer Unit must be removed from
the vehicle to service this seal. Refer to Power Trans-
fer Unit Removal in this section for procedures.
REMOVAL
(1) Remove P.T.U. end cover bolts (Fig. 15).(2) Gently tap on end cover ears to separate cover
from case (Fig. 16).
(3) Remove ring gear oil trough (Fig. 17).
(4) Remove input shaft and ring gear from case
(Fig. 18).
(5) Use Special Tool No. 7794-A (seal puller) to
remove seal (Fig. 19).
Fig. 12 P.T.U. End Cover Bolts
Fig. 13 End Cover Removal
Fig. 14 Bolt Tightening Sequence
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REMOVAL AND INSTALLATION (Continued)

INSTALLATION
(1) Clean and inspect seal area.
(2) Lay housing on bench and install new seal with
seal driver C-4657 and handle C-4171 (Fig. 20). The
seal must be installed with the spring side facing
towards the ring gear. Drive the seal in until it bot-
toms against the case shoulder.
(3) Install input shaft.
(4) Install oil trough.(5) Apply MopartGasket Maker or equivalent to
sealing surfaces of end cover and reinstall. Tighten
bolts to 28 N´m (250 in. lbs.).
CAUTION: When end cover is installed be careful
not to damage the P.T.U. Input Shaft Cover Seal.
(6) Reinstall P.T.U. assembly into vehicle.
(7) Check and fill fluids as required.
DIFFERENTIAL CARRIER SEAL
The Power Transfer Unit must be removed from
the vehicle to replace this seal.
REMOVAL
(1) Remove P.T.U. from vehicle.
Fig. 15 P.T.U. End Cover Bolts
Fig. 16 End Cover Removal
Fig. 17 Oil Trough
Fig. 18 Input Shaft and Ring Gear Removal
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REMOVAL AND INSTALLATION (Continued)

(2) Use a pry bar to remove seal from retainer
plate (Fig. 21). Be careful not to damage seal journal
when removing seal.
INSTALLATION
(1) Using a large socket, carefully install new seal.
The spring side of the seal must face the transaxle
differential.
(2) Reinstall the P.T.U. into the vehicle.(3) Check and fill fluids as required.
REAR COVER O-RING
REMOVAL
(1) Raise vehicle on hoist.
(2) Remove rear cover retaining bolts (Fig. 22).
(3) Index rear cover to the case for later reassem-
bly (Fig. 23).
(4) Pull rear cover out of the P.T.U. case (Fig. 24).
(5) Remove rear cover O-Ring (Fig. 25).
INSTALLATION
(1) To install, reverse removal procedure.
POWER TRANSFER UNIT OUTPUT SEAL
The power transfer unit must be removed from the
vehicle to replace this seal.
Fig. 19 Seal Removal
Fig. 20 Seal Installation
Fig. 21 Transaxle Differential Carrier Seal
Fig. 22 Rear Cover Bolts
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REMOVAL AND INSTALLATION (Continued)

REMOVAL
(1) Raise vehicle on hoist.
(2) Remove propeller shaft.
(3) Remove rear cover retaining bolts (Fig. 26).(4) Index rear cover to the case for later reassem-
bly (Fig. 27).
(5) Pull rear cover out of the P.T.U. case (Fig. 28).
Fig. 23 Mark Rear Cover
Fig. 24 Rear Cover Removal
Fig. 25 O-Ring Removal
Fig. 26 Rear Cover Bolts
Fig. 27 Mark Rear Cover
Fig. 28 Rear Cover Removal
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REMOVAL AND INSTALLATION (Continued)

(6) Remove output flange nut (Fig. 29).
(7) Index the pinion to the flange (Fig. 30).
(8) Using a hydraulic press, press off output flange
from pinion.
(9) Use a hammer and chisel to remove output
seal (Fig. 31).
CAUTION: If the output flange requires replace-
ment, a new shim may be required. Refer to Output
Flange Shim Selection procedure in this section to
determine correct shim requirements.
INSTALLATION
(1) Install new seal with Seal Installer 5049 (Fig.
32).
(2) If the original flange is used, align index marks
and press flange onto pinion. If a new flange is used
disregard the alignment marks on the pinion and
press flange onto the pinion.(3) Install flange nut and tighten to 244 N´m (180
ft. lbs.).
Fig. 29 Output Flange Nut
Fig. 30 Mark Flange and Shaft
Fig. 31 Seal Removal
Fig. 32 Seal Installation
NSTRANSAXLE AND POWER TRANSFER UNIT 21 - 173
REMOVAL AND INSTALLATION (Continued)

(4) Install rear cover. Use care not to cut rear
cover O-Ring when installing rear cover into P.T.U.
housing.
(5) Install rear cover retaining bolts and tighten to
28 N´m (250 in. lbs.).
(6) Install propeller shaft.
(7) Check and fill fluids as required.
INPUT SHAFT COVER SEAL
The power transfer unit input shaft cover seal is
the larger of the two seals located on the inside of
the end cover. The differential bearing cup must be
removed to service this seal.
The Power Transfer Unit must be removed from
vehicle to perform this operation.
REMOVAL
(1) Remove P.T.U. end cover bolts (Fig. 33).
(2) Gently tap on end cover ears to separate cover
from case (Fig. 34).
(3) Use special tool No. 6514 and remove the dif-
ferential bearing race located in the end cover (Fig.
35). The race must be removed to gain access to the
seal.
(4) Use special tool No. 7794-A to remove seal (Fig.
36).
INSTALLATION
(1) Clean and inspect seal area.
(2) Use special tool No. MD998803 and install seal
(Fig. 37). When installing seal the spring side of the
seal must face toward the special tool.(3) Reinstall the original bearing race and shim
using special tool No. 6522 (Fig. 38) and (Fig. 39).
CAUTION: The original shim must be installed
behind the bearing cup to maintain proper bearing
preload.
(4) Apply MopartGasket Maker, Loctite Gasket
Eliminator No. 518 or equivalent to sealing surfaces
of end cover.
(5) Place end cover onto P.T.U. case and install
bolts. Tighten bolts to 28 N´m (250 in. lbs.) in the
sequence shown in (Fig. 40). Retighten first bolt after
all others are tight.
Fig. 33 P.T.U. End Cover Bolts
Fig. 34 End Cover Removal
Fig. 35 Bearing Race Removal
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REMOVAL AND INSTALLATION (Continued)

CAUTION: When end cover is installed be careful
not to damage the P.T.U. Input Shaft Cover Seal.
(6) Reinstall P.T.U. assembly into vehicle.(7) Check and fill fluids as required.
HALF SHAFT INNER SEAL
The power transfer unit half shaft inner seal is the
smaller of the two seals located on the inside of the
end cover.
REMOVAL
(1) Remove power transfer unit from the vehicle.
(2) Remove end cover bolts (Fig. 41).
(3) Tap on end cover ears to separate cover from
case (Fig. 42).
(4) Drive seal out with a hammer and small chisel
(Fig. 43).
Fig. 36 Seal Removal
Fig. 37 Seal Installation
Fig. 38 Bearing Shim and Race
Fig. 39 Installing Bearing Race
Fig. 40 Bolt Tightening Sequence
NSTRANSAXLE AND POWER TRANSFER UNIT 21 - 175
REMOVAL AND INSTALLATION (Continued)

INSTALLATION
(1) Clean and inspect seal area.
(2) Install seal with a 1 1/16 inch socket (Fig. 44).
The seal must be installed with the spring side of the
seal facing end cover ball bearing. The seal will bot-
tom against a machined shoulder in the cover.
(3) Clean sealing surfaces of the end cover and
P.T.U. case. Apply a bead of MopartGasket Maker,
Loctite Gasket Eliminator No. 518 or equivalent.(4) Place end cover onto P.T.U. case and install
bolts. Tighten bolts to 28 N´m (250 in. lbs.) in the
Fig. 41 End Cover Bolts
Fig. 42 End Cover Removal
Fig. 43 Seal Removal
Fig. 44 Seal Installation
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REMOVAL AND INSTALLATION (Continued)