Nissan Xterra. Instruction — part 635
GEAR COMPONENTS
TM-53
< UNIT DISASSEMBLY AND ASSEMBLY >
[6MT: FS6R31A]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
a. Press out 3rd main gear and 1st main gear using suitable tool.
CAUTION:
Be careful not to damage 1st outer baulk ring.
b. Remove 1st needle bearing from mainshaft.
20. Remove 1st-2nd synchronizer hub assembly and 2nd main gear according to the following.
a. Press out 1st gear bushing, 1st-2nd synchronizer hub assembly
and 2nd main gear using suitable tool.
CAUTION:
Be aware that when using the press, if mainshaft gear posi-
tioner catches on the V-block, etc., mainshaft could be dam-
aged.
b. Remove 2nd needle bearing from mainshaft.
21. Remove 1st-2nd coupling sleeve according to the following.
a. Remove spread springs and shifting inserts from 1st-2nd syn-
chronizer hub.
b. Remove 1st-2nd coupling sleeve from 1st-2nd synchronizer
hub.
22. Remove 6th main gear and 5th-6th synchronizer hub assembly according to the following.
a. Remove snap ring from mainshaft using suitable tool.
b. Press out 6th main gear and 5th-6th synchronizer hub assembly
using suitable tool.
c. Remove 6th needle bearing from mainshaft.
23. Remove 5th-6th coupling sleeve according to the following.
a. Remove spread springs and shifting inserts from 5th-6th syn-
chronizer hub.
b. Remove 5th-6th coupling sleeve from 5th-6th synchronizer hub.
24. Remove 3rd counter gear, 3rd-4th synchronizer hub assembly, 4th counter gear according to the follow-
ing.
SCIA1458E
SCIA1459E
PCIB1244E
SCIA1460E
TM-54
< UNIT DISASSEMBLY AND ASSEMBLY >
[6MT: FS6R31A]
GEAR COMPONENTS
a. Press out 3rd counter gear, 3rd-4th synchronizer hub assembly,
4th counter gear, 4th needle bearing, 4th gear bushing, 4th
counter gear thrust washer, and counter rear bearing inner race
using suitable tool.
b. Remove 3rd needle bearing from counter gear.
25. Remove 3rd-4th coupling sleeve according to the following.
a. Remove spread springs and shifting inserts from 3rd-4th syn-
chronizer hub.
b. Remove 3rd-4th coupling sleeve from 3rd-4th synchronizer hub.
26. Press out 3rd gear bushing using suitable tool.
CAUTION:
Do not use oil hole of 3rd gear bushing when press out.
Inspection
INFOID:0000000009485382
GEAR AND SHAFT
If the contact surface on each gear, mainshaft, main drive gear, and
counter gear, etc., has damage, peeling, abrasion, dent, bent, or any
other damage, replace the components.
SYNCHRONIZERS
SCIA1389E
PCIB1327E
SCIA1680E
PCIB1246E
GEAR COMPONENTS
TM-55
< UNIT DISASSEMBLY AND ASSEMBLY >
[6MT: FS6R31A]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
• If the contact surface on coupling sleeve, synchronizer hub, and
shifting insert has damage or abrasion, replace the components.
• Coupling sleeve and synchronizer hub shall move smoothly.
• If the cam surface on baulk ring or contact surface on insert has
damage or excessive wear, replace with a new one.
• If spread spring damaged, replace with a new one.
• Reverse Synchronizer
Push baulk ring on the cone, and measure the clearance between
baulk ring and cone. If the measurement is below limit, replace it
with a new one.
BAULK RING CLEARENCE
• Single Cone Synchronizer (5th and 6th)
Push baulk ring on the cone, and measure the clearance between
baulk ring and cone. If the measurement is below limit, replace it
with a new one.
• Double Cone Synchronizer (1st, 3rd and 4th)
SMT387A
SCIA0608J
Clearance
Standard
value
Limit value Refer to
PCIB1328E
Clearance
Standard value
Refer to
Limit value
Refer to
PCIB1328E
TM-56
< UNIT DISASSEMBLY AND ASSEMBLY >
[6MT: FS6R31A]
GEAR COMPONENTS
Check the clearance between outer baulk ring, synchronizer cone,
and inner baulk ring as follows.
CAUTION:
The clearances (A) and (B) are controlled with outer baulk
ring, synchronizer cone, and inner baulk ring as a set.
Replace them as a set if the clearances are outside the limit
value.
1. Measure the clearance (A) at 2 points or more diagonally oppo-
site using a dial indicator and Tool. Then calculate the mean
value.
2. Measure the clearance (B) at 2 points or more diagonally oppo-
site using a feeler gauge. Then calculate the mean value.
• Triple Cone Synchronizer (2nd)
Check the clearance between outer baulk ring, synchronizer cone,
and inner baulk ring as follows.
CAUTION:
The clearances (A), (B) and (C) are controlled with outer baulk
ring, synchronizer cone, and inner baulk ring as a set.
Replace them as a set if the clearances are outside the limit
value.
SCIA1679E
Tool number
: ST30031000 (J-22912-01)
Clearance (A)
Standard value
Limit value
Refer to
PCIB0945E
Clearance (B)
Standard value
1st
Refer to
3rd,4th
Refer to
Limit value
Refer to
SCIA1084E
PCIB0603E
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