Page 4845 of 5135

D09211
ForwardClutchRe-
turn Spring
D03664
C56374
D25587
A
D26707Forward Clutch Piston
− AUTOMATIC TRANSMISSION / TRANSFORWARD CLUTCH ASSY (U151E/U151F)
40−81
U151E, U151F A/T REPAIR MANUAL (RM1021U)
5. INSPECT FORWARD CLUTCH RETURN SPRING
SUB−ASSY
(a) Using vernier calipers, measure the free length of the
spring together with the spring seat.
Standard free length: 26.74 mm (1.0528 in.)
6. REMOVE FORWARD CLUTCH PISTON SUB−ASSY
(a) Place the forward clutch drum onto the oil pump.
(b) Holding the forward clutch piston by hand, apply com-
pressed air (392 kPa, 4.0 kgf/cm
2, 57 psi) to the oil pump
to remove the forward clutch piston.
HINT:
When the piston cannot be removed as it is slanted, either blow
the air again with the protruding side pushed, or remove the pis-
ton using the needle nose plier with vinyl tape on the tip.
7. REMOVE INPUT SHAFT OIL SEAL RING
(a) Remove the input shaft oil seal ring to the input shaft.
8. INSTALL INPUT SHAFT OIL SEAL RING
(a) Compress the new input shaft oil seal ring from both sides
to reduce dimension A.
Dimension A: 5 mm (0.197 in.)
(b) Coat the oil seal ring with ATF and install it to the input
shaft.
NOTICE:
Do not expand the gap of the oil seal ring too much. Fix the
hooks certainly.
9. INSTALL FORWARD CLUTCH PISTON SUB−ASSY
(a) Coat the forward clutch piston with ATF, and install it to the
input shaft.
NOTICE:
Be careful not to damage the lip seal of the forward clutch
piston.
Page 4846 of 5135

D26708
Forward Clutch
Return SpringInput Shaft
D26709
Clutch BalancerInput Shaft
D26418
SST
Snap Ring
D26788
Stopper
Stopper
40−82
− AUTOMATIC TRANSMISSION / TRANSFORWARD CLUTCH ASSY (U151E/U151F)
U151E, U151F A/T REPAIR MANUAL (RM1021U)
10. INSTALL FORWARD CLUTCH RETURN SPRING
SUB−ASSY
(a) Install the return spring to the input shaft.
NOTICE:
Installing the spring sub−assembly, check all of the
springs are fit in the piston correctly.
(b) Coat the clutch balancer with ATF.
(c) Install the clutch balancer to the input shaft.
NOTICE:
SBe careful not to damage the lip seal of the forward
clutch balancer.
SInstall the clutch balancer carefully not to have a
pinching and any other defects at the sealing lip.
SApply enough ATF to the sealing lip prior to assem-
bling.
(d) Place SST on the clutch balancer, and compress the
clutch balancer with a press.
SST 09387−00020
(e) Install the snap ring with a snap ring expander.
(f) Be sure the end gap of the snap ring is not aligned with
the spring retainer claw.
NOTICE:
SStop the press when the spring sheet is lowered to the
place1−2 mm (0.039−0.078 in.) from the snap ring
groove.
SThis prevents the spring sheet from being deformed.
SDo not expand the snap ring excessively.
(g) Set the end gap of the snap ring in the piston shown in the
illustration.
NOTICE:
The end gap of the snap ring should not coincide with any
of the stoppers.
Page 4847 of 5135

D26415
Flange
Plate Disc
D26753
Snap Ring
D26715
D03672
− AUTOMATIC TRANSMISSION / TRANSFORWARD CLUTCH ASSY (U151E/U151F)
40−83
U151E, U151F A/T REPAIR MANUAL (RM1021U)
11. INSTALL FORWARD MULTIPLE DISC CLUTCH
CLUTCH DISC
(a) Coat the 5 discs with ATF.
(b) Install the 5 plates, 5 discs and flange input shaft.
NOTICE:
Be careful about the order of discs, plates and flange as-
sembly.
(c) Using a screwdriver, install the snap ring.
(d) Check that the end gap of the snap ring is not aligned with
one of the cutouts.
NOTICE:
The snap ring should be fixed certainly in the groove of the
drum.
12. INSPECT PACK CLEARANCE OF FORWARD CLUTCH
(a) Using a dial indicator, measure the forward clutch pack
clearance while applying and releasing compressed air
(392 kgfcm
2, 4.0 kPa, 57 psi).
Pack clearance:1.00−1.25 mm (0.0394−0.4921in.)
If the piston stroke is less than the minimum, parts may have
been assembled incorrectly. Check and reassemble again.
If the clearance is not standard, select another flange.
HINT:
There are 5 different flanges in thickness.
Flange thickness: mm (in.)
No.ThicknessNo.Thickness
13.00 (0.1181)43.45 (0.1358)
23.15 (0.1240)53.60 (0.1417)
33.30 (0.1299)−−
13. INSPECT FORWARD MULTIPLE DISC CLUTCH
CLUTCH DISC
(a) Check if the disc lightly rotates when rotating the forward
clutch assy after inserting the multiple disc clutch into it.
NOTICE:
Do not place the forward clutch assy in a vise.
Page 4848 of 5135
4010K−01
D09644
Control Shaft Lever
D09643
Lock Nut
Nut Stopper
D09639
Park/neutral Position Switch
40−18
− AUTOMATIC TRANSMISSION / TRANSAUTOMATIC TRANSAXLE ASSY (U151E/U151F)
U151E, U151F A/T REPAIR MANUAL (RM1021U)
AUTOMATIC TRANSAXLE ASSY (U151E/U151F)
OVERHAUL
1. REMOVE SPEEDOMETER DRIVEN HOLE (ATM) COVER SUB−ASSY
(a) Remove the bolt and speedometer driven hole cover sub−assy from the transaxle assy.
(b) Remove the O−ring from the speedometer driven hole cover.
2. REMOVE PARK/NEUTRAL POSITION SWITCH ASSY
(a) Remove the nut, washer and control shaft lever.
(b) Using a screwdriver, unstake the nut stopper, and re-
move the lock nut and nut stopper.
(c) Remove the 2 bolts and pull out the park/neutral position
switch.
3. REMOVE BREATHER PLUG HOSE
(a) Remove the breather plug hose from the transaxle case.
Page 4849 of 5135
C83143
Union
O−ring
C83144
Elbow
O−ring
D03900D30672
Speed Sensor
D26716
D09176
− AUTOMATIC TRANSMISSION / TRANSAUTOMATIC TRANSAXLE ASSY (U151E/U151F)
40−19
U151E, U151F A/T REPAIR MANUAL (RM1021U)
4. REMOVE OIL COOLER TUBE UNION (INLET OIL
COOLER UNION)
(a) Remove the union.
(b) Remove the O−ring from the union.
5. REMOVE OIL COOLER TUBE UNION (OUTLET OIL
COOLER UNION)
(a) Remove the elbow.
(b) Remove the O−ring from the elbow.
6. REMOVE SPEED SENSOR
(a) Remove the 2 bolts and the 2 speed sensors from the
transaxle assy.
7. REMOVE TRANSAXLE CASE NO.1PLUG
(a) Remove the 4 transaxle case No. 1 plugs from the trans-
axle case.
(b) Remove the 4 O−rings from the 4 transaxle case No.1
plugs.
8. FIX AUTOMATIC TRANSAXLE ASSY
(a) Fix the transaxle assy.
Page 4850 of 5135
C91925
C86316
Magnet
AT0103
Magnet
C91927
Temperature
Sensor
D03547
Transmission Wire
40−20
− AUTOMATIC TRANSMISSION / TRANSAUTOMATIC TRANSAXLE ASSY (U151E/U151F)
U151E, U151F A/T REPAIR MANUAL (RM1021U)
9. REMOVE AUTOMATIC TRANSAXLE OIL PAN
SUB−ASSY
(a) Remove the 18 bolts, oil pan and gasket.
(b) Remove the 2 magnets from the oil pan.
10. INSPECT TRANSMISSION OIL CLEANER MAGNET
(a) Remove the magnets and use them to collect any steel
chips. Examine the chips and particles in the pan and on
the magnet to determine what type of wear has occurred
in the transaxle:
Steel (magnetic).... bearing, gear and plate wear
Brass (non−magnetic).... bushing wear
11. DISCONNECT TRANSMISSION WIRE
(a) Remove the 7 connectors from the shift solenoid valves.
(b) Remove the bolt, lock plate and ATF temperature sensor.
12. REMOVE TRANSMISSION WIRE
(a) Remove the bolt and transmission wire from the transaxle
case.
Page 4851 of 5135
C91931
Valve Body Oil
Strainer Assy
C91932
O−ring
C91933
C83127
C83128
− AUTOMATIC TRANSMISSION / TRANSAUTOMATIC TRANSAXLE ASSY (U151E/U151F)
40−21
U151E, U151F A/T REPAIR MANUAL (RM1021U)
13. REMOVE VALVE BODY OIL STRAINER ASSY
(a) Remove the 3 bolts and oil strainer.
(b) Remove the O−ring from the oil strainer.
14. REMOVE TRANSMISSION VALVE BODY ASSY
(a) Support the valve body assy and remove the 17 bolts and
valve body assy.
15. REMOVE GOVERNOR APPLY GASKET NO.1
(a) Remove the governor apply gasket No.1 from the trans-
axle case.
16. REMOVE TRANSAXLE CASE 2ND BRAKE GASKET
(a) Remove the transaxle case 2nd brake gasket from the
transaxle case.
Page 4852 of 5135
C83129
D03554
Check Ball
D03555
D03556
D03902
O−ring
C−3 Accumulator Piston 40−22
− AUTOMATIC TRANSMISSION / TRANSAUTOMATIC TRANSAXLE ASSY (U151E/U151F)
U151E, U151F A/T REPAIR MANUAL (RM1021U)
17. REMOVE BRAKE DRUM GASKET
(a) Remove the brake drum gasket from the transaxle case.
18. REMOVE CHECK BALL BODY
(a) Remove the check ball body and spring from the trans-
axle case.
19. REMOVE C−3 ACCUMULATOR PISTON
(a) Remove the spring from the C−3 accumulator piston.
(b) Apply compressed air (392 kPa, 4.0 kgf/cm
2, 57 psi) to the
oil hole and remove the C−3 accumulator piston.
NOTICE:
SBlowing off the air may cause the piston to jump−out.
When removing the piston, hold it by your hand using
a waste cloth.
STake care not to splash ATF when air−blowing.
(c) Remove the O−ring from the C−3 accumulator piston.