Page 1520 of 1938
DIFFERENTIAL REPAIR
NOTE: The transfer shaft should be removed for
differential repair and bearing turning torque check-
ing.
Fig. 133 Tighten Output Shaft Retaining Nut to 271
N´m (200 ft. lbs.)
Fig. 134 Checking Output Shaft End Play
Fig. 135 Checking Bearings Turning Torque
Fig. 136 Remove Extension Seal
Fig. 137 Install New Seal into Extension
Fig. 138 Differential Cover Bolts
21 - 46 TRANSAXLE AND POWER TRANSFER UNITNS
DISASSEMBLY AND ASSEMBLY (Continued)
Page 1521 of 1938
NOTE: Use MoparTRTV sealant, or equivalent,
when installing differential cover.
Fig. 139 Remove or Install Differential Cover
Fig. 140 Remove Bearing Retainer Axle Seal
Fig. 141 Install Bearing Retainer Axle Seal
Fig. 142 Differential Bearing Retainer Bolts
Fig. 143 Remove or Install Bearing Retainer
Fig. 144 Differential Bearing Retainer (Typical)
NSTRANSAXLE AND POWER TRANSFER UNIT 21 - 47
DISASSEMBLY AND ASSEMBLY (Continued)
Page 1522 of 1938
NOTE: Use MoparTRTV sealant, or equivalent,
when installing differential bearing retainer.WARNING: HOLD ONTO DIFFERENTIAL ASSEMBLY
TO PREVENT IT FROM ROLLING OUT OF HOUSING.
Use MopartSilicone Rubber Adhesive Sealant, or
equivalent, when installing extension housing.
Fig. 145 Extension Bolts
Fig. 146 Remove or Install Extension Housing
Fig. 147 Differential and Extension
Fig. 148 Remove Differential Bearing Cone
(Extension Housing Side)
Fig. 149 Position Bearing Cone Onto Differential
Fig. 150 Install Differential Bearing Cone
21 - 48 TRANSAXLE AND POWER TRANSFER UNITNS
DISASSEMBLY AND ASSEMBLY (Continued)
Page 1523 of 1938
To install the differential bearing cup and cone on
the ring gear side, use Special Tool 5052, and Special
Tool C-4171.
NOTE: The differential is serviced as an assembly.
The only parts that are serviceable within the differ-
ential are the differential bearing cups and cones. If
any other part fails within the differential, you must
replace the differential assembly along with the
transfer shaft.
CAUTION: Side gear end play must be BETWEEN
0.001 to 0.013 inch.
Fig. 151 Position Button and Collets Onto
Differential and Bearing (Ring Gear Side)
Fig. 152 Position Tool 5048 Over Button and Collets
at Differential Bearing
Fig. 153 Remove Differential Bearing Cone
Fig. 154 Checking Side Gear End Play
Fig. 155 Checking Side Gear End Play (Typical)
NSTRANSAXLE AND POWER TRANSFER UNIT 21 - 49
DISASSEMBLY AND ASSEMBLY (Continued)
Page 1524 of 1938

To remove the differential bearing cup from the
extension housing/adapter side, use Special Tool6062A, Remover. To install the differential bearing
cup on the extension housing/adapter side, use Spe-
cial Tool 6536, Driver and Special Tool C-4171, Han-
dle.
DETERMINING SHIM THICKNESS
Shim thickness need be determined only if any of
the following parts are replaced:
²Transaxle case
²Differential carrier
²Differential bearing retainer
²Extension housing
²Differential bearing cups and cones
Refer to Bearing Adjustment Procedure in rear of
this section to determine proper shim thickness.
CLEANING AND INSPECTION
VALVE BODY
Allow all parts to soak a few minutes in a suitable
clean solvent. Wash thoroughly and blow dry with
compressed air. Make sure all passages are clean and
free from obstructions.
Inspect manual and throttle valve operating levers
and shafts for being bent, worn or loose. If a lever is
loose on its shaft, it should be replaced. Do not
attempt to straighten bent levers.
Inspect all mating surfaces for burrs, nicks and
scratches. Minor blemishes may be removed with cro-
cus cloth, using only a very light pressure. Using a
straightedge, inspect all mating surfaces for warpage
or distortion. Slight distortion may be corrected,
using a surface plate. Make sure all metering holes
in steel plate are open. Using a pen light, inspect
bores in valve body for scores, scratches, pits and
irregularities.
Fig. 156 Differential Bearing Retainer
Fig. 157 Position Bearing Cup Remover Tool in
Retainer
Fig. 158 Remove Bearing Cup
Fig. 159 Install Bearing Cup
21 - 50 TRANSAXLE AND POWER TRANSFER UNITNS
DISASSEMBLY AND ASSEMBLY (Continued)
Page 1527 of 1938

hold the shims in place. Install the output shaft gear
and bearing assembly.
(13) Install the retaining nut and washer and
torque to 271 N´m (200 ft. lbs.).
(14) Using an inch-pound torque wrench, check the
turning torque.The torque should be between 3
and 8 inch-pounds.
(15) If the turning torque is too high, install a
.05mm (.002 inch) thicker shim. If the turning torque
is too low, install a .05 mm (.002 inch) thinner shim.
Repeat until the proper turning torque is 3 to 8 inch
pounds.
DIFFERENTIAL BEARING
(1) Position the transaxle assembly vertically on
the support stand, differential bearing retainer side
up.
(2) Install Tool L-4436A into the differential and
onto the pinion mate shaft .
(3) Rotate the differential at least one full revolu-
tion to ensure the tapered roller bearings are fully
seated.(4) Using Tool L-4436A and an inch-pound torque
wrench, check the turning torque of the differential.
The turning torque should be between 5 and 18
inch-pounds.
(5) If the turning torque is within specifications,
remove tools. Setup is complete.
(6) If turning torque is not within specifications
proceed with the following steps.
(a) Remove differential bearing retainer from
the transaxle case.
(b) Remove the bearing cup from the differential
bearing retainer using Tool 6062A.
(c) Remove the existing shim from under the
cup.
(d) Measure the existing shim.
OUTPUT SHAFT BEARING SHIM CHART
Fig. 161 Tool L-4436 and Torque Wrench
Fig. 162 Checking Differential Bearings Turning
Torque
NSTRANSAXLE AND POWER TRANSFER UNIT 21 - 53
ADJUSTMENTS (Continued)
Page 1528 of 1938

NOTE: If the turning torque was too high when
measured, install a .05 mm (.002 inch) thinner shim.
If the turning torque is was too low, install a .05 mm
(.002 inch) thicker shim. Repeat until 5 to 18 inch-
pounds turning torque is obtained.
Oil Baffle is not required when making shim
selection.
(e) Install the proper shim under the bearing
cup. Make sure the oil baffle is installed properly
in the bearing retainer, below the bearing shim
and cup.
(f) Install the differential bearing retainer using
Tool 5052 and C-4171. Seal the retainer to the
housing with MOPARtAdhesive Sealant and
torque bolts to 28 N´m (250 in. lbs.).(7) Using Tool L-4436A and an inch-pound torque
wrench, recheck the turning torque of the differen-
tial.The turning torque should be between 5
and 18 inch-pounds.
TRANSFER SHAFT BEARING
(1) Use Tool L-4434 to remove the retaining nut
and washer. Remove the transfer shaft gear using
Tool L-4407.
(2) Install a 2.29 mm (.090 inch) and a 1.39 mm
(.055 inch) gauging shims on the transfer shaft
behind the governor support.
(3) Install transfer shaft gear and bearing assem-
bly and torque the nut to 271 N´m (200 ft. lbs.).
(4) To measure bearing end play:
(5) Attach Tool L-4432 to the transfer gear.
(6) Mount a steel ball with grease into the end of
the transfer shaft.
(7) Push and pull the gear while rotating back and
forth to insure seating of the bearing rollers.
(8) Using a dial indicator, measure transfer shaft
end play.
(9) Refer to the Transfer Bearing Shim Chart for
the required shim combination to obtain the proper
bearing setting.
(10) Use Tool L-4434 to remove the retaining nut
and washer. Remove the transfer shaft gear using
Tool L-4407.
(11) Remove the two gauging shims and install the
correct shim combination. Install the transfer gear
and bearing assembly.
(12) Install the retaining nut and washer and
torque to 271 N´m (200 ft. lbs.). Measure transfer
shaft end play, end play should be .05 to .25 mm
(.002 to .010 inch).
(13) Measure bearing end play as outlined in Step
(4). End play should be between .05 mm and .25 mm
(.002 to .010 inch).
DIFFERENTIAL BEARING SHIM CHART
SHIM THICKNESS
MM INCH
.980 0.0386
1.02 0.0402
1.06 0.0418
1.10 0.0434
1.14 0.0449
1.18 0.0465
1.22 0.0481
1.26 0.0497
1.30 0.0512
1.34 0.0528
1.38 0.0544
1.42 0.0560
1.46 0.0575
1.50 0.0591
1.54 0.0607
1.58 0.0623
1.62 0.0638
1.66 0.0654
1.70 0.0670
2.02 0.0796
2.06 0.0812
21 - 54 TRANSAXLE AND POWER TRANSFER UNITNS
ADJUSTMENTS (Continued)
Page 1538 of 1938

SPECIFICATIONS
31TH AUTOMATIC TRANSAXLE
Type ................Automatic three speed with
torque converter and integral differential
Torque Converter Diameter........241 millimeters
(9.48 in.)
Oil Capacity..............8.6 Liters (18.25 pints)
OilType..........MopartATF PLUS 3 Type 7176
Cooling Method......Water Heat Exchanger and/or
air to oil heat exchanger
Lubrication......Pump (internal-external gear-type
Gear Ratios
Transmission Portion
First Gear..............................2.69
Second Gear.............................1.55
Third Gear..............................1.00
Reverse Gear............................2.10
Pump Clearances
Outer Gear To Pocket.............0.045-0.141mm
(0.0018-0.0056 in.)
Outer Gear Side Clearance.........0.020-0.046mm
(0.0008-0.0018 in.)
Inner Gear Side Clearance.........0.020-0.046mm
(0.0008-0.0018 in.)Tapered Roller Bearing Settings
Differential Assembly . . .6 to 12 in. lbs. Drag Torque
Output Hub............0to3in.lbs. Drag Torque
Transfer Shaft.........0.002 to 0.010 in. End Play
Overall Drag At Output
Hub.............3to16in.lbs. Drag Torque
Clutch Pack Clearances
Front Clutch (Not Adjustable)........1.27-2.79mm
(0.050-0.110 in.)
Rear Clutch.........0.71-1.10mm (0.028-0.043 in.)
Band Adjustment
Kickdown, Backed Off From 8 N´m
(72 in. lbs.).....................21/4Turns
Low-Reverse, Backed Off From 5 N´m
(41 in. lbs.)......................31/2Turns
21 - 64 TRANSAXLE AND POWER TRANSFER UNITNS