Page 3785 of 4770
SM0189
SM0190
SM0049
SST
SM0050
MX±26
± MANUAL TRANSAXLE (S51)INPUT SHAFT
1876 Author: Date:
(b) Using a snap ring expander, install the snap ring.
4. INSPECT 3RD GEAR THRUST CLEARANCE
(See page MX±20)
5. INSTALL SYNCHRONIZER RING, NEEDLE ROLLER
BEARING, SPACER, 4TH GEAR AND REAR BALL
BEARING
(a) Apply gear oil to the needle roller bearings.
(b) Install the spacer and needle roller bearings.
(c) Place the synchronizer ring on the gear.
HINT:
Align the ring slots with the shifting keys and the ring projections
with the hub slots.
(d) Using SST and a press, install the rear ball bearing.
SST 09608±00071
6. INSTALL SNAP RING
(a) Select a snap ring that allows the minimum axial play.
MarkThickness mm (in.)
A2.15±2.20 (0.0846±0.0866)
B2.20±2.25 (0.0866±0.0886)
C2.25±2.30 (0.0886±0.0906)
D2.30±2.35 (0.0906±0.0925)
E2.35±2.40 (0.0925±0.0945)
(b) Using a screwdriver and hammer, tap in the snap ring.
Page 3786 of 4770
± MANUAL TRANSAXLE (S51)INPUT SHAFT
MX±27
1877 Author: Date:
7. INSPECT 4TH GEAR THRUST CLEARANCE
(See page MX±20)
Page 3787 of 4770
MX04N±01
Q02544
Output Shaft
Spacer
1st Gear
Needle Roller Bearing
Synchronizer Ring
No.1 Hub Sleeve
Shifting Key
Shifting Key Spring
No.1 Clutch Hub
Rear Bearing
4th Driven Gear 2nd Gear
2nd Gear Bushing
3rd Driven GearBall
Synchronizer RingSpacer
Needle Roller Bearing MX±28
± MANUAL TRANSAXLE (S51)OUTPUT SHAFT
1878 Author: Date:
OUTPUT SHAFT
COMPONENTS
Page 3788 of 4770

MX04O±01
Q05794
2nd Gear
1st Gear
SM0137
CM0065
SST
MT0063
SST
± MANUAL TRANSAXLE (S51)OUTPUT SHAFT
MX±29
1879 Author: Date:
DISASSEMBLY
1. INSPECT 1ST AND 2ND GEARS THRUST CLEAR-
ANCE
Using a feeler gauge, measure the thrust clearance.
Standard clearance:
1st gear: 0.10 ± 0.29 mm (0.0039 ± 0.0114 in.)
2nd gear: 0.20 ± 0.44 mm (0.0079 ± 0.0173 in.)
Maximum clearance:
1st gear: 0.35 mm (0.0138 in.)
2nd gear: 0.50 mm (0.0197 in.)
2. INSPECT 1ST AND 2ND GEARS RADIAL CLEAR-
ANCE
Using a dial indicator, measure the radial clearance between
the gear and shaft.
Standard clearance:
0.009 ± 0.053 mm (0.0004 ± 0.0021 in.)
Maximum clearance:
0.070 mm (0.0028 in.)
If the clearance exceeds the maximum, replace the gear,
needle roller bearing or shaft.
3. REMOVE REAR BALL BEARING, 4TH DRIVEN GEAR
AND OUTPUT GEAR SPACER
(a) Using SST and a press, remove the rear ball bearing and
4th driven gear.
SST 09950±00020
(b) Remove the output gear spacer and ball.
4. REMOVE 3RD DRIVEN GEAR, 2ND GEAR, NEEDLE
ROLLER BEARING AND SYNCHRONIZER RING
(a) Shift the No.1 hub sleeve into the 1st gear.
(b) Using SST and a press, remove the 3rd driven gear and
2nd gear.
SST 09950±00020
(c) Remove the needle roller bearing and synchronizer rings.
Page 3789 of 4770
Z00427
Q02948
MX±30
± MANUAL TRANSAXLE (S51)OUTPUT SHAFT
1880 Author: Date:
5. REMOVE NO.1 HUB SLEEVE ASSEMBLY, 1ST GEAR,
SYNCHRONIZER RING, NEEDLE ROLLER BEARING,
THRUST WASHER AND LOCKING BALL
(a) Using a press, remove the No.1 hub sleeve, 1st gear and
synchronizer ring.
(b) Remove the needle roller bearing and locking ball.
(c) Using a screwdriver and hammer, drive out the thrust
washer.
6. REMOVE NO.1 HUB SLEEVE, 3 SHIFTING KEYS AND
SPRINGS FROM NO.1 CLUTCH HUB
Page 3790 of 4770

MX04P±01
WM0064
WM0065
MT0780
MT0787
± MANUAL TRANSAXLE (S51)OUTPUT SHAFT
MX±31
1881 Author: Date:
INSPECTION
1. INSPECT 1ST GEAR SYNCHRONIZER RING
(a) Check for wear or damage.
(b) Check the braking effect of the synchronizer ring. Turn the
synchronizer ring in one direction while pushing it to the
gear cone. Check that the ring locks.
If the braking effect is insufficient, apply a small amount of the
fine lapping compound between the synchronizer ring and gear
cone. Lightly rub the synchronizer ring and gear cone together.
NOTICE:
Ensure the fine lapping compound is completely washed
off after rubbing.
(c) Check again the braking effect of the synchronizer ring.
(d) Using a feeler gauge, measure the clearance between
the synchronizer ring back and the gear spline end.
Minimum clearance:
0.6 mm (0.024 in.)
If the clearance is less than the minimum, replace the synchro-
nizer ring, and apply a small amount of the fine lapping com-
pound on gear cone.
NOTICE:
Ensure the fine lapping compound is completely washed
off after rubbing.
2. INSPECT 2ND GEAR SYNCHRONIZER RING
(a) Check for wear or damage.
(b) Check the braking effect of the synchronizer ring.
Turn the synchronizer ring in one direction while pushing
it to the gear cone. Check that the ring locks.
If the braking effect is insufficient, replace the synchronizer ring.
(c) Using a feeler gauge, measure the clearance between
the synchronizer ring back and gear spline end.
Minimum clearance:
0.7 mm (0.028 in.)
If the clearance is less than the minimum, replace the synchro-
nizer ring.
Page 3791 of 4770
WM0066
CM0014
ACB
CM0015
MX±32
± MANUAL TRANSAXLE (S51)OUTPUT SHAFT
1882 Author: Date:
3. INSPECT SHIFT FORK AND HUB SLEEVE CLEAR-
ANCE
Using a feeler gauge, measure the clearance between the hub
sleeve and shift fork.
Maximum clearance:
1.0 mm (0.039 in.)
If the clearance exceeds the maximum, replace the shift fork or
hub sleeve.
4. INSPECT OUTPUT SHAFT
(a) Using a micrometer, measure the outer diameter of the
output shaft journal surface.
Minimum outer diameter:
Part A: 31.970 mm (1.2587 in.)
Part B: 37.970 mm (1.4949 in.)
Part C: 31.990 mm (1.2594 in.)
If the outer diameter is less than the minimum, replace the out-
put shaft.
(b) Using a dial indicator, check the shaft runout.
Maximum runout:
0.05 mm (0.0020 in.)
If the runout exceeds the maximum, replace the output shaft.
Page 3792 of 4770
MX04Q±01
Q02949
Front
SM0199
SST
Z00428
Z00429
± MANUAL TRANSAXLE (S51)OUTPUT SHAFT
MX±33
1883 Author: Date:
REASSEMBLY
HINT:
Coat all of the sliding and rotating surfaces with gear oil before
reassembly.
1. INSTALL NO.1 CLUTCH HUB INTO HUB SLEEVE
(a) Install the 3 springs and shifting keys to the clutch hub.
(b) Install the hub sleeve to the clutch hub.
HINT:
Position the identification groove of the hub sleeve to the front
of the transmission.
2. INSTALL THRUST WASHER, 1ST GEAR, NEEDLE
ROLLER BEARING, SYNCHRONIZER RING AND NO.1
HUB SLEEVE TO OUTPUT SHAFT
(a) Using SST and a press, install the thrust washer.
SST 09316±60011 (09316±00041)
(b) Apply gear oil to the needle roller bearing.
(c) Place the synchronizer ring on the gear and align the ring
slots with the shifting keys.
(d) Using a press, install the 1st gear and No.1 hub sleeve.
3. INSPECT 1ST GEAR THRUST CLEARANCE
(See page MX±28)