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U151F AUTOMATIC TRANSAXLE – UNDERDRIVE PLANETARY GEARAX–263
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3. INSTALL DIFFERENTIAL DRIVE PINION
(a) Using SST and a press, press the differential drive
pinion.
SST 09726-40010, 09950-60010 (09951-00260),
09950-70010 (09951-07100)
NOTICE:
Press the counter driven gear while rotating it.
4. INSTALL CYLINDRICAL ROLLER BEARING RACE
INNER
(a) Using SST and a press, press the cylindrical roller
bearing race inner.
SST 09506-35010, 09950-60010 (09951-00260),
09950-70010 (09951-07100)
NOTICE:
Press the counter driven gear while rotating it.
5. INSTALL FRONT PLANETARY GEAR NUT
(a) Place the underdrive planetary gear in a soft jaw
vise.
NOTICE:
Be careful not to damage the differential drive
pinion.
(b) Using a socket wrench, install a new lock nut.
Torque: 280 N*m (2,885 kgf*cm, 207 ft.*lbf)
HINT:
Use a torque wrench with a fulcrum length of 750
mm (29.53 in.).
(c) Using a pin punch and hammer, stake the lock nut.
CAUTION:
Be sure that there are no cracks on the nut.
6. INSPECT UNDERDRIVE PLANETARY GEAR
PRELOAD
HINT:
(See page AX-260)
D026434E01
D026432E01
D025609E02
C056809
Page 1986 of 3000
AX–264U151F AUTOMATIC TRANSAXLE – UNDERDRIVE CLUTCH
AX
TRANSMISSION
U151F AUTOMATIC TRANSAXLE
UNDERDRIVE CLUTCH
COMPONENTS
C114869E03
Page 1987 of 3000
U151F AUTOMATIC TRANSAXLE – UNDERDRIVE CLUTCHAX–265
AX
DISASSEMBLY
1. INSPECT UNDERDRIVE PACK CLEARANCE
HINT:
(See page AX-266)
2. REMOVE UNDERDRIVE CLUTCH FLANGE NO.2
HOLE SNAP RING
(a) Using a screwdriver, remove the underdrive clutch
flange No.2 snap ring.
3. REMOVE UNDERDRIVE CLUTCH DISC NO.1
(a) Remove the flange, 4 discs and 4 plates from the
underdrive clutch drum.
4. REMOVE UNDERDRIVE CLUTCH RETURN SPRING
SUB-ASSEMBLY
(a) Place SST on the clutch balancer and compress the
spring with a press.
SST 09350-32014
(b) Using a snap ring expander, remove the snap ring.
NOTICE:
• Stop the press when the spring seat is
lowered to the place 1 to 2 mm (0.039 to 0.078
in.) from the snap ring groove.
• This prevents the spring seat from being
deformed.
• Do not expand the snap ring excessively.
(c) Remove the clutch balancer from the underdrive
clutch drum.
D003701E01
D026430E01
D003703E01
C056359E01
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AX–266U151F AUTOMATIC TRANSAXLE – UNDERDRIVE CLUTCH
AX
(d) Remove the return spring from the underdrive clutch
drum.
5. REMOVE UNDERDRIVE CLUTCH PISTON SET
(a) Install the underdrive clutch to the transaxle case.
NOTICE:
Be careful not to damage the oil seal ring.
(b) Holding the underdrive clutch piston by hand, apply
compressed air (392 kPa, 4.0 kgf/cm
2, 57 psi) to the
transaxle case to remove the underdrive clutch
piston.
6. REMOVE UNDERDRIVE CLUTCH DRUM O-RING
(a) Using a screwdriver, remove the O-ring from the
underdrive clutch drum.
INSPECTION
1. INSPECT UNDERDRIVE PACK CLEARANCE
(a) Install the underdrive clutch to the transaxle case.
NOTICE:
Be careful not to damage the oil seal rings.
(b) Install a dial indicator as shown in the illustration.
(c) Measure the underdrive clutch pack clearance while
applying and releasing compressed air (392 kPa,
4.0 kgf/cm
2, 57 psi).
Pack clearance:
1.51 to 1.71 mm (0.0594 to 0.0673 in.)
If the pack clearance is not as specified, inspect the
discs, plates and flange.
HINT:
There are 5 flanges in different thickness.
Flange thickness: mm (in.)
C056360E02
D003705
D026465E02
D026429E01
Mark Thickness Mark Thickness
1 3.0 (0.118) 4 3.6 (0.122)
2 3.2 (0.126) 5 3.8 (0.130)
3 3.4 (0.134) - -
Page 1989 of 3000

U151F AUTOMATIC TRANSAXLE – UNDERDRIVE CLUTCHAX–267
AX
2. INSPECT UNDERDRIVE CLUTCH DISC NO.1
(a) Check if the sliding surface of the disc, plate and
flange are worn or burnt. If necessary, replace them.
HINT:
• If the lining of the disc comes off or discolors, or if
a part of the groove is worn, replace all discs.
• Before installing new discs, immerse them in ATF
for at least 15 minutes.
3. INSPECT UNDERDRIVE CLUTCH DRUM SUB-
ASSEMBLY
(a) Using a dial indicator, measure the inside diameter
of the underdrive clutch drum bushing.
Standard drum bushing:
37.06 to 37.08 mm (1.4591 to 1.4598 in.)
Maximum drum bushing:
37.13 mm (1.4618 in.)
If the inside diameter is greater than the maximum,
replace the underdrive clutch drum.
4. INSPECT UNDERDRIVE CLUTCH RETURN SPRING
SUB-ASSEMBLY
(a) Using a vernier calipers, measure the free length of
the spring together with the spring seat.
Standard free length:
17.14 mm (0.6752 in.)
REASSEMBLY
1. INSTALL UNDERDRIVE CLUTCH DRUM O-RING
(a) Coat a new O-ring with ATF, and install it to the
underdrive clutch drum.
NOTICE:
Make sure that the O-ring is not twisted or
pinched.
2. INSTALL UNDERDRIVE CLUTCH PISTON SET
(a) Coat the underdrive clutch piston with ATF, and
install it to the underdrive clutch piston drum.
NOTICE:
• Be careful not to damage the O-ring.
• Be careful not to damage the lip of the piston.
D004077
D008129E01
D003824
D026465E01
D003860
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AX–268U151F AUTOMATIC TRANSAXLE – UNDERDRIVE CLUTCH
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3. INSTALL UNDERDRIVE CLUTCH RETURN SPRING
SUB-ASSEMBLY
(a) Install the return spring to the underdrive clutch
drum.
NOTICE:
Installing the spring sub-assembly, check that
all of the springs are fit in the piston correctly.
(b) Coat the clutch balancer with ATF.
(c) Install the clutch balancer to the underdrive clutch
drum.
NOTICE:
Be careful not to damage the lip of the clutch
balancer.
(d) Place SST on the clutch balancer and compress the
piston return spring with a press.
SST 09350-32014 (09351-32070)
(e) Using a snap ring expander, install the snap ring to
the underdrive clutch drum.
(f) Be sure that the end gap of the snap ring is not
aligned with the spring retainer claw.
NOTICE:
• Stop the press when the spring seat is
lowered to the place 1 to 2 mm (0.039 to 0.078
in.) from the snap ring groove.
• This prevents the spring seat from being
deformed.
• Do not expand the snap ring excessively.
(g) Set the end gap of the snap ring in the underdrive
clutch drum as shown in the illustration.
NOTICE:
The end gap of the snap ring should not align
with any of the stoppers.
C056360E02
C056359E01
D003703E01
D025592E01
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U151F AUTOMATIC TRANSAXLE – UNDERDRIVE CLUTCHAX–269
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4. INSTALL UNDERDRIVE CLUTCH DISC NO.1
(a) Coat the 4 discs with ATF.
(b) Install the 4 plates, 4 discs and flange to the
underdrive clutch drum.
NOTICE:
Make sure that the plates, discs, and flange are
installed as shown in the illustration.
5. INSTALL 1ST & REVERSE BRAKE RETURN SPRING
SHAFT SNAP RING
(a) Using a screwdriver, install the underdrive clutch
flange No.2 hole snap ring.
(b) Check that the end gap of snap ring is not aligned
with one of the cutouts.
NOTICE:
The snap ring should be fully engaged in the
groove of the drum.
6. INSPECT UNDERDRIVE PACK CLEARANCE
HINT:
(See page AX-266)
D026431E01
D003701
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AX–276U151F AUTOMATIC TRANSAXLE – DIFFERENTIAL CASE
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INSPECTION
1. INSPECT FRONT DIFFERENTIAL
(a) Using a dial indicator, measure the backlash of one
pinion gear while holding the front differential side
gear toward the case.
Standard backlash:
0.05 - 0.20 mm (0.0020 - 0.0079 in.)
NOTICE:
Do not mount the surface of front differential
case which contacts with bushing in a vise.
If the backlash is not within the specified value, refer
to the table below and select a thrust washer which
will ensure that the backlash is within the specified
value.
Thrust washer thickness: mm (in.)
(b) Engage the front differential side to the above
mentioned front differential case.
(c) Install the differential case LH to the front differential
case and measure its center.
(d) After that, remove the differential case LH.
(e) Using a straight edge and feeler gauge, measure
the clearance between the front differential case
and the front differential side gear.
HINT:
• t= Thrust washer thickness
• L= Clearance
• t= L-0.162 - 0.265 mm (0.0064 - 0.0104 in.)
If the clearance is not within the specified value,
refer to the table below and select a thrust washer
which will ensure that the clearance is within the
specified value.
Thrust washer thickness: mm (in.)
C050216E01
Mark Thickness Mark Thickness
A 0.95 (0.0373) F 1.20 (0.0472)
B 1.00 (0.0393) G 1.25 (0.0492)
C 1.05 (0.0413) H 1.30 (0.0512)
D 1.10 (0.0433) J 1.35 (0.0532)
E 1.15 (0.0453) K 1.40 (0.0552)
C050213E01
C050214E01
Mark Thickness Mark Thickness
A 0.95 (0.0373) F 1.20 (0.0472)
B 1.00 (0.0393) G 1.25 (0.0492)
C 1.05 (0.0413) H 1.30 (0.0512)
D 1.10 (0.0433) J 1.35 (0.0532)
E 1.15 (0.0453) K 1.40 (0.0552)