NISSAN PATROL 1998 Y61 / 5.G Manual Transmission User Guide

Gear Components
SMT797C
MAJOR OVERHAUL
MT-10

SMT818C
MAJOR OVERHAUL
Gear Components (Cont'd)
MT-11

Shift Control Components
SMT370D
MAJOR OVERHAUL
MT-12

Case Components
1. Remove check ball plug, check spring and check ball. Then
remove interlock stopper.
+If interlock assembly is removed as a unit, the check ball
can fall into transmission case.
+Be careful not to lose check ball.
2. Remove control housing, return spring and check ball.
+Be careful not to lose check ball.
3. Drive out retaining pin from striking arm.
4. Remove OD gear case together with striking arm by tapping
lightly.
SMT366A
SMT438B
SMT439B
SMT440B
SMT444B
DISASSEMBLY
MT-13

5. Remove front cover and gasket.
6. Remove stopper ring and main drive bearing snap ring.
7. Remove transmission case by tapping lightly.
8. Remove front cover oil seal.
Shift Control Components
1. Mount adapter plate on vise.
2. Remove OD & reverse fork rod.
SMT370A
SMT371A
SMT822C
SMT392A
SMT823C
DISASSEMBLY
Case Components (Cont'd)
MT-14

3. Drive out retaining pin from striking lever.
4. While pulling out striking rod, remove striking lever and striking
interlock. Then remove 1st & 2nd, 3rd & 4th and reverse shift
fork.
5. Drive out retaining pin from OD shift fork.
6. Pull out OD fork rod and then remove OD shift fork.
Gear Components
1. Before removing gears and shafts, measure each gear end
play.
Gear end play:
Refer to SDS, MT-33.
+If not within speci®cation, disassemble and check contact sur-
face of gear to hub, washer, bushing, needle bearing and shaft.
2. Remove rear side components on mainshaft and counter gear.
a. Remove reverse coupling sleeve.
b. Remove mainshaft rear snap ring and counter gear rear snap
ring.
c. Remove C-ring holder and mainshaft C-rings from mainshaft.
Use punch and hammer to remove C-rings.
SMT374AA
SMT824C
SMT376A
SMT825C
SMT826C
DISASSEMBLY
Shift Control Components (Cont'd)
MT-15

d. Pull out counter gear rear end bearing.
e. Remove reverse idler gear and reverse idler thrust washers.
f. Pull out reverse main gear together with mainshaft spacer and
reverse synchronizer hub. Then remove reverse gear needle
bearings.
g. Pull out reverse counter gear.
h. Remove OD coupling sleeve together with OD baulk ring,
reverse baulk ring and spring inserts.
i. Pull out reverse gear bushing.
j. Pull out OD counter gear together with reverse cone.
SMT827C
SMT380A
SMT773A
SMT770A
SMT771A
DISASSEMBLY
Gear Components (Cont'd)
MT-16

3. Press out mainshaft and counter gear alternately.
4. Remove front side components on mainshaft.
a. Remove 1st gear washer and steel ball.
b. Remove 1st main gear and 1st gear needle bearing.
+Be careful not to lose steel ball.
c. Press out 2nd main gear together with 1st gear bushing and 1st
& 2nd synchronizer assembly.
d. Remove mainshaft front snap ring.
e. Press out 3rd main gear together with 3rd & 4th synchronizer
assembly and 3rd gear needle bearing.
SMT772AA
SMT383A
SMT384A
SMT385A
DISASSEMBLY
Gear Components (Cont'd)
MT-17

5. Remove front side components on counter gear.
a. Remove counter gear rear thrust bearing.
b. Remove sub gear components.
6. Remove main drive gear bearing.
a. Remove main drive gear snap ring.
b. Press out main drive gear bearing.
7. Remove bearings from case components.
SMT404AA
SMT470A
SMT420AA
SMT483CB
DISASSEMBLY
Gear Components (Cont'd)
MT-18

Shift Control Components
+Check contact surface and sliding surface for wear, scratches,
projections or other damage.
Gear Components
GEARS AND SHAFTS
+Check shafts for cracks, wear or bending.
+Check gears for excessive wear, chips or cracks.
SYNCHRONIZERS
+Check spline portion of coupling sleeves, hubs, and gears for
wear or cracks.
+Check baulk rings for cracks or deformation.
+Check shifting inserts for wear or deformation.
+Check insert springs for deformation.
+Measure wear of main drive, 1st and OD baulk rings.
Clearance between baulk ring and gear:
Refer to SDS, MT-33.
+If the clearance is smaller than the wear limit, replace baulk
ring.
SMT398A
SMT386A
SMT423A
SMT427C
SMT140
INSPECTION
MT-19