Page 2425 of 2870

4AT-111
AUTOMATIC TRANSMISSION
Drive Pinion Shaft Assembly
36.Drive Pinion Shaft Assembly
A: REMOVAL
1) Remove the transmission assembly from vehi-
cle.
mission Assembly.>
2) Pull out the torque converter clutch assembly.
Clutch Assembly.>
3) Remove the input shaft.
4) Lift-up the lever on rear side of transmission har-
ness connector, and then disconnect it from the
stay.
5) Disconnect the inhibitor switch connector from
the stay.
6) Disconnect the air breather hose.
87, REMOVAL, Air Breather Hose.>
7) Remove the ATF charger pipe.
REMOVAL, Oil Charger Pipe.>
8) Remove the ATF cooler inlet and outlet pipes.
Hose.>
9) Separate the torque converter clutch case and
transmission case part.
MOVAL, Torque Converter Clutch Case.>
10) Separate the transmission case and extension
case part.
Case.>
11) Remove the reduction drive gear.
99, REMOVAL, Reduction Drive Gear.>
12) Remove the reduction driven gear.
4AT-97, REMOVAL, Reduction Driven Gear.>13) Remove the drive pinion shaft mounting bolt
and remove the drive shaft assembly from oil pump
housing.
B: INSTALLATION
1) Assemble the drive pinion assembly to oil pump
housing.
NOTE:
Be careful not to bend the shim.
Be careful not to press-fit the pinion into housing
bore.
Tightening torque:
40 N
⋅m (4.1 kgf-m, 29.5 ft-lb)
2) Combine the torque converter case with trans-
mission case.
Torque Converter Clutch Case.>
3) Install the reduction driven gear.
97, INSTALLATION, Reduction Driven Gear.>
4) Install the reduction drive gear.
INSTALLATION, Reduction Drive Gear.>
5) Align the transmission case and extension case.
Case.>
6) Insert the inhibitor switch and transmission con-
nector to the stay.
7) Install the air breather hose.
STALLATION, Air Breather Hose.>
8) Install the ATF cooler inlet and outlet pipes.
and Hose.>
AT-00114
AT-01252
AT-01252
Page 2426 of 2870

4AT-112
AUTOMATIC TRANSMISSION
Drive Pinion Shaft Assembly
9) Install the ATF charger pipe with O-ring.
10) Insert the input shaft with rotating it by hand
lightly, and then check the protrusion amount.
Normal protrusion A:
50 — 55 mm (1.97 — 2.17 in)
11) Install the torque converter clutch assembly.
er Clutch Assembly.>
12) Install the transmission assembly into the vehi-
cle.
Transmission Assembly.>
C: DISASSEMBLY
1) Remove the caulking part of lock nut, and then
remove the lock nut with holding rear spline part of
drive pinion shaft using ST1 and ST2. Pull out the
drive pinion collar.
ST1 498937110 HOLDER
ST2 499787700 WRENCH
ST3 499787500 ADAPTER
2) Remove the O-ring.3) Separate the roller bearing and outer race from
drive pinion shaft using the press.
4) Separate the front roller bearing from drive pin-
ion shaft using the press and ST.
ST 498517000 REPLACER
D: ASSEMBLY
1) Measure the dimension “A” of drive pinion shaft
ST 398643600 GAUGE
AT-00291
A
AT-00197
ST1
ST3
ST2
(A) Outer race
(A) Front roller bearing
AT-00198
(A)
AT-00199
(A)
ST
A
AT-00200
Page 2427 of 2870

4AT-113
AUTOMATIC TRANSMISSION
Drive Pinion Shaft Assembly
2) Using a press, press-fit the new roller bearing
into specified position.
NOTE:
If excessive force is applied to roller bearing, the
roller bearing will not turn easily.
3) After fitting a new O-ring to the drive pinion shaft,
attach the drive pinion collar to the drive pinion
shaft.
4) Install the lock washer to drive pinion shaft in
proper direction.
5) Tighten the new lock nuts using ST1, ST2 and
ST3.
Calculate the lock washer and lock nut specifica-
tions using following formula.
T2 = L2/ (L1+L2) ×T1
T1: 116 N⋅m (11.8 kgf-m, 85.3 ft-lb)
[Required torque setting]
T2: Tightening torque
L1: ST2 length 0.072 m (2.83 in)
L2: Torque wrench length
Example:
ST1 498937110 HOLDER
ST2 499787700 WRENCH
ST3 499787500 ADAPTERNOTE:
Install ST2 to torque wrench as straight as possi-
ble.
6) Measure the starting torque of bearing. Make
sure the starting torque is within the specified
range. If the torque is not within specified range, re-
place the roller bearing.
Starting torque:
7.6 — 38.1 N (0.776 — 3.88 kgf, 1.7 — 3.88 kg)
7) Stake the lock nut at two points.
8) Measure the dimension “B” of drive pinion shaft
ST 398643600 GAUGE
9) Calculate the thickness “t” (mm) of drive pinion
shim.
t = 6.5±0.0625− (B−A)
(A) Drive pinion shaft
(B) Roller bearing
Torque wrench length
m (in)Tightening torque
N⋅m (kgf-m, ft-lb)
0.4 (15.75) 98 (10.0, 72.3)
0.45 (17.72) 100 (10.2, 73.5)
0.5 (19.69) 101 (10.3, 74.6)
0.55 (21.65) 102 (10.4, 75.4)
AT-00201
(B)
(A)
ST1
AT-00202
L1 [m (in)]
L2 [m (in)]
ST2
ST3
AT-00203
B
AT-00204
Page 2428 of 2870

4AT-114
AUTOMATIC TRANSMISSION
Drive Pinion Shaft Assembly
10) Select three or less shims from following table.
E: INSPECTION
Make sure that all component parts are free of
harmful cut, gouges, and other faults.
Adjust the teeth alignment.
ADJUSTMENT, Drive Pinion Shaft Assembly.>
F: ADJUSTMENT
1) Remove the liquid gasket completely.
2) Install the oil pump housing assembly to torque
converter clutch case, and secure them with tight-
ening four bolts evenly.
NOTE:
Use an old gasket or an aluminum washer so as not
to damage the mating surface of housing.
Tightening torque:
41 N
⋅m (4.2 kgf-m, 30.4 ft-lb)
3) Rotate the drive pinion several times using ST1
and ST2.
ST1 498937110 HOLDER
ST2 499787700 WRENCH4) Adjust backlash between drive pinion and hy-
poid driven gear.
MENT, Front Differential.>
5) Apply red lead evenly to the surfaces of three or
four teeth on hypoid driven gear. Rotate the drive
pinion in the forward and reverse directions for sev-
eral times. Remove the oil pump housing, and
check the tooth contact pattern.
If the tooth contact is improper, readjust the back-
lash or shim thickness.
JUSTMENT, Front Differential.>
Correct tooth contact
Checking item: Tooth contact pattern is slightly
shifted toward to toe side under no-load
rotation. [When loaded, contact pattern moves
toward heel.]
Face contact
Checking item: Backlash is too large.
Contact pattern
Drive pinion shim
TOOL NUMBER Thickness mm (in)
31451AA050 0.150 (0.0059)
31451AA060 0.175 (0.0069)
31451AA070 0.200 (0.0079)
31451AA080 0.225 (0.0089)
31451AA090 0.250 (0.0098)
31451AA100 0.275 (0.0108)
AT-00205
AT-00206
ST2
ST1
(A) Toe side
(B) Heel side
AT-00207
(A)
(B)
AT-00208
Page 2429 of 2870
4AT-115
AUTOMATIC TRANSMISSION
Drive Pinion Shaft Assembly
Corrective action: Increase thickness of pinion
height adjusting washer in order to bring drive pin-
ion shaft close to hypoid driven gear.
Flank contact
Checking item: Backlash is too small.
Contact pattern
Corrective action: Reduce thickness of pinion
height adjusting washer in order to bring drive pin-
ion shaft away from hypoid driven gear.
Toe contact (inside end contact)
Checking item: Contact areas is small
Contact patternCorrective action: Reduce thickness of pinion
height adjusting washer in order to bring drive pin-
ion shaft away from hypoid driven gear.
Heel contact (outside end contact)
Checking item: Contact areas is small
Contact pattern
Corrective action: Increase thickness of pinion
height adjusting washer in order to bring drive pin-
ion shaft close to hypoid driven gear.
AT-00212
AT-00209
AT-00213
AT-00210
AT-00213
AT-00211
AT-00212
Page 2430 of 2870
4AT-116
AUTOMATIC TRANSMISSION
Drive Pinion Shaft Assembly
6) If tooth contact is correct, mark the differential
side retainer position and loosen it. After fitting a
new O-ring and oil seal, screw in the differential
side retainer to the marked position. Tighten the
lock plate with specified torque.
Tightening torque:
25 N
⋅m (2.5 kgf-m, 18.1 ft-lb)
(A) Lock plate
AT-00214
(A)
Page 2431 of 2870

4AT-117
AUTOMATIC TRANSMISSION
Front Differential
37.Front Differential
A: REMOVAL
1) Remove the transmission assembly from vehi-
cle.
mission Assembly.>
2) Pull out the torque converter clutch assembly.
Clutch Assembly.>
3) Remove the input shaft.
4) Lift-up the lever on rear side of transmission har-
ness connector, and then disconnect it from the
stay.
5) Disconnect the inhibitor switch from the stay.
6) Remove the ATF charger pipe.
REMOVAL, Oil Charger Pipe.>
7) Remove the ATF cooler inlet and outlet pipes.
Hose.>
8) Separate the torque converter clutch case and
transmission case.
Torque Converter Clutch Case.>
9) Remove the seal pipe.
10) Remove the differential side retainers using
ST.
NOTE:
Hold the differential case assembly by hand to
avoid damaging retainer mounting hole of torque
converter clutch case.
ST 499787000 WRENCH ASSY
11) Remove the differential assembly without dam-
aging installation part of retainer.
B: INSTALLATION
1) Install the differential assembly to torque con-
verter clutch case.
CAUTION:
Do not damage the inside of torque converter
clutch case (especially the mating surface of
differential side retainer).
2) Install the O-ring to left and right differential side
retainer.
3) Install the side retainers using ST.
117, REMOVAL, Front Differential.>
ST 499787000 WRENCH ASSY
4) Adjust the front differential backlash.
4AT-121, ADJUSTMENT, Front Differential.>
5) Install the lock plate.
Tightening torque:
25 N
⋅m (2.5 kgf-m, 18.1 ft-lb)
AT-00114(A) Differential ASSY
(A) Lock plate
AT-00215
(A)
AT-00214
(A)
Page 2432 of 2870
4AT-118
AUTOMATIC TRANSMISSION
Front Differential
6) Install the new seal pipe to torque converter
clutch case.
7) Install the torque converter clutch case to trans-
mission case.
Torque Converter Clutch Case.>
8) Insert the inhibitor switch and transmission con-
nector to the stay.
9) Install the ATF cooler pipe.
STALLATION, ATF Cooler Pipe and Hose.>
10) Install the ATF charger pipe with O-ring.
to 4AT-88, INSTALLATION, Oil Charger Pipe.>11) Insert the input shaft with rotating it by hand
lightly, and then check the protrusion amount.
Normal protrusion A:
50 — 55 mm (1.97 — 2.17 in)
12) Install the torque converter clutch assembly.
er Clutch Assembly.>
13) Install the transmission assembly into the vehi-
cle.
Transmission Assembly.>
C: DISASSEMBLY
1. DIFFERENTIAL CASE ASSEMBLY
1) Remove taper roller bearing using ST and press.
ST 498077000 REMOVER
(A) Seal pipe
(A) Transmission harness ASSY
(B) Inhibitor switch harness
AT-00176
AT-01351
(B)(A)
AT-00291
A
AT-00216