Page 1457 of 2177

(4) Remove bearing retaining snap ring (Fig. 18).
(5) Use bearing puller MD998346 to remove bear-
ing (Fig. 19).
INSTALLATION
The end cover ball bearing can be removed and
installed without removing the Power Transfer Unit
from the vehicle. When replacing the bearing the out-
put seal must be removed to gain access to the bear-
ing.
CAUTION: When installing bearing, position the
bearing in place by hand square to the bore. Other-
wise, bearing and/or housing damage may occur
upon installation.(1) Use installer MD998200 and driver handle
C-4171 to install bearing (Fig. 20) into the housing.
(2) Install bearing retaining snap ring.
CAUTION: When installing bearing retaining snap
ring, be sure to index the snap ring so that the
snap ring does not cover bearing oil passage.
(3) Install new outer half shaft seal using
MD998334 seal installer (Fig. 21).Do not reuse the
old seal.
(4) Reinstall right front half shaft.
(5) Check and fill fluids as required.
Fig. 18 Bearing Snap Ring
1 - BEARING
2 - SNAP RING PLIERS
3 - BEARING SNAP RING
Fig. 19 Bearing Removal
1 - P.T.U. END COVER
2 - SPECIAL TOOL
MD998346
Fig. 20 Bearing Installation
1 - SPECIAL TOOL MD998200
2 - SPECIAL C-4171
Fig. 21 Installing New Seal
1 - P.T.U. END COVER
2 - HAMMER
3 - SPECIAL TOOL
MD998334
21 - 10 POWER TRANSFER UNITRS
END COVER BALL BEARING (Continued)
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Page 1458 of 2177
END COVER SEAL
REMOVAL
The Power Transfer Unit must be removed from
the vehicle to perform this operation. (Refer to 21 -
TRANSMISSION/TRANSAXLE/POWER TRANSFER
UNIT - REMOVAL)
(1) Remove P.T.U. end cover bolts (Fig. 22).
(2) Gently tap on end cover ears with a hammer to
separate end cover from the case (Fig. 23).
(3) Clean and inspect sealer surfaces.
INSTALLATION
(1) Reinstall cover and tighten bolts to 28 N´m
(250 in. lbs.) in the sequence shown in (Fig. 24).
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.
(2) Reinstall P.T.U. into vehicle.
(3) Check and fill fluids as required.
Fig. 22 P.T.U. End Cover Bolts
1 - POWER TRANSFER UNIT
2 - FILL PLUG
3 - END COVER
4 - OUTPUT SHAFT
Fig. 23 End Cover Removal
1 - END COVER EARS
2 - HAMMER
3 - POWER TRANSFER UNIT
Fig. 24 Bolt Tightening Sequence
RSPOWER TRANSFER UNIT21-11
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Page 1459 of 2177

HALF SHAFT INNER SEAL
REMOVAL
The power transfer unit half shaft inner seal is the
smaller of the two seals located on the inside of the
end cover.
(1) Remove power transfer unit from the vehicle.
(2) Remove end cover bolts (Fig. 25).
(3) Tap on end cover ears to separate cover from
case (Fig. 26).
(4) Drive seal out with a hammer and small chisel
(Fig. 27).
INSTALLATION
The power transfer unit half shaft inner seal is the
smaller of the two seals located on the inside of the
end cover.
(1) Clean and inspect seal area.
(2) Install seal with a 1 1/16 inch socket (Fig. 28).
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.
Fig. 26 End Cover Removal
1 - END COVER EARS
2 - HAMMER
3 - POWER TRANSFER UNIT
Fig. 27 Seal Removal
1 - END COVER
2 - END COVER SEAL
3 - AXLE SHAFT SEAL
Fig. 25 End Cover Bolts
1 - POWER TRANSFER UNIT
2 - FILL PLUG
3 - END COVER
4 - OUTPUT SHAFT
21 - 12 POWER TRANSFER UNITRS
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Page 1460 of 2177

(4) 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. 29). Retighten first bolt after
all other bolts are tight.
(5) Reinstall P.T.U. assembly.
(6) Check and fill fluids as required.
INPUT SHAFT COVER SEAL
REMOVAL
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.
(1) Remove P.T.U. end cover bolts (Fig. 30).
(2) Gently tap on end cover ears to separate cover
from case (Fig. 31).
(3) Use special tool No. 6514 and remove the dif-
ferential bearing race located in the end cover (Fig.
32). The race must be removed to gain access to the
seal.2
(4) Use special tool No. 7794-A to remove seal (Fig.
33).
Fig. 28 Seal Installation
1 - END COVER
2 - SOCKET
3 - HAMMER
Fig. 29 Bolt Tightening Sequence
Fig. 30 P.T.U. End Cover Bolts
1 - POWER TRANSFER UNIT
2 - FILL PLUG
3 - END COVER
4 - OUTPUT SHAFT
RSPOWER TRANSFER UNIT21-13
HALF SHAFT INNER SEAL (Continued)
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Page 1461 of 2177
INSTALLATION
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.
(1) Clean and inspect seal area.
(2) Use special tool No. MD998803 and install seal
(Fig. 34). When installing seal the spring side of the
seal must face toward the special tool.
Fig. 31 End Cover Removal
1 - END COVER EARS
2 - HAMMER
3 - POWER TRANSFER UNIT
Fig. 32 Bearing Race Removal
1 - END COVER
2 - SPECIAL TOOL
No. 6514
Fig. 33 Seal Removal
1 - END COVER
2 - SPECIAL TOOL
7794±A
3 - SLIDE HAMMER
4 - SOFT JAW VICE
Fig. 34 Seal Installation
1 - SPECIAL TOOL No. MD998803
2 - HAMMER
3 - END COVER
21 - 14 POWER TRANSFER UNITRS
INPUT SHAFT COVER SEAL (Continued)
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Page 1462 of 2177

(3) Reinstall the original bearing race and shim
using special tool No. 6522 (Fig. 35) and (Fig. 36).
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. 37). 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. assembly into vehicle.
(7) Check and fill fluids as required.
INPUT SHAFT END SEAL
REMOVAL
The input shaft end seal is located on the end of
the input shaft.
(1) Remove power transfer unit from the vehicle.
(2) Remove end cover bolts (Fig. 38).
Fig. 35 Bearing Shim and Race
1 - SHIM
2 - BEARING RACE
3 - END COVER
Fig. 36 Installing Bearing Race
1 - HAMMER
2 - END COVER
3 - SPECIAL TOOL No. 6522
4 - HANDLE 4171
Fig. 37 Bolt Tightening Sequence
Fig. 38 End Cover Bolts
1 - POWER TRANSFER UNIT
2 - FILL PLUG
3 - END COVER
4 - OUTPUT SHAFT
RSPOWER TRANSFER UNIT21-15
INPUT SHAFT COVER SEAL (Continued)
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Page 1463 of 2177

(3) Tap on end cover ears to separate end cover
from case (Fig. 39).
(4) Pry out seal with a pry bar (Fig. 40).INSTALLATION
The input shaft end seal is located on the end of
the input shaft.
(1) Clean and inspect seal area.
(2) Remove input shaft from housing and stand on
soft block of wood. Install input shaft end seal with
seal installer 5065 and handle C-4171.
(3) Lubricate seal lip after installing seal into
input shaft.
(4) 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.
(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. 41). 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. assembly.
(7) Check and fill fluids as required.
Fig. 39 Side Cover Removal
1 - END COVER EARS
2 - HAMMER
3 - POWER TRANSFER UNIT
Fig. 40 Seal Removal
1 - POWER TRANSFER UNIT
2 - PRYBAR
3 - SEAL
Fig. 41 Bolt Tightening Sequence
21 - 16 POWER TRANSFER UNITRS
INPUT SHAFT END SEAL (Continued)
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Page 1464 of 2177
INPUT SHAFT SEAL
REMOVAL
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.
(1) Remove P.T.U. end cover bolts (Fig. 42).
(2) Gently tap on end cover ears to separate cover
from case (Fig. 43).
(3) Remove ring gear oil trough (Fig. 44).
(4) Remove input shaft and ring gear from case
(Fig. 45).
(5) Use Special Tool No. 7794-A (seal puller) to
remove seal (Fig. 46).
Fig. 42 P.T.U. End Cover Bolts
1 - POWER TRANSFER UNIT
2 - FILL PLUG
3 - END COVER
4 - OUTPUT SHAFT
Fig. 43 End Cover Removal
1 - END COVER EARS
2 - HAMMER
3 - POWER TRANSFER UNIT
Fig. 44 Oil Trough
1 - OIL TROUGH
2 - POWER TRANSFER UNIT
RSPOWER TRANSFER UNIT21-17
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