2000 NISSAN PATROL Electronic Repair Manual

Forward and Overrun Clutches
SAT213K
REPAIR FOR COMPONENT PARTS
AT-1167

DISASSEMBLY AND ASSEMBLY
Forward and overrun clutches are serviced essentially the same
way as reverse clutch is serviced. However, note the following
exceptions.
+Check of forward clutch operation
+Check of overrun clutch operation
+Removal of forward clutch drum
Remove forward clutch drum from transmission case by
holding snap ring.
+Removal of forward clutch and overrun clutch pistons
1. While holding overrun clutch piston, gradually apply com-
pressed air to oil hole.
2. Remove overrun clutch from forward clutch.
SAT860A
SAT861A
SAT865A
SAT862A
SAT863A
REPAIR FOR COMPONENT PARTS
Forward and Overrun Clutches (Cont'd)
AT-1168

+Removal and installation of return springs
+Inspection of forward clutch and overrun clutch return springs
Inspection standard:
Refer to SDS, AT-1208.
+Inspection of forward clutch drive plates
Thickness of drive plate:
Standard
1.90 - 2.05 mm (0.0748 - 0.0807 in)
Wear limit
1.8 mm (0.071 in)
+Inspection of overrun clutch drive plates
Thickness of drive plate:
Standard
1.52 - 1.67 mm (0.0598 - 0.0657 in)
Wear limit
1.4 mm (0.055 in)
+Installation of forward clutch piston and overrun clutch piston
1. Install forward clutch piston by turning it slowly and evenly.
+Apply ATF to inner surface of clutch drum.
SAT492GA
SAT829A
SAT845A
SAT845A
SAT866A
REPAIR FOR COMPONENT PARTS
Forward and Overrun Clutches (Cont'd)
AT-1169

+Align notch in forward clutch piston with groove in for-
ward clutch drum.
2. Install overrun clutch by turning it slowly and evenly.
+Apply ATF to inner surface of forward clutch piston.
+Measurement of clearance between retaining plate and snap
ring of overrun clutch
Specified clearance:
Standard
1.0 - 1.4 mm (0.039 - 0.055 in)
Allowable limit
2.4 mm (0.094 in)
Retaining plate:
Refer to SDS, AT-1209.
+Measurement of clearance between retaining plate and snap
ring of forward clutch
Specified clearance:
Standard
0.35 - 0.75 mm (0.0138 - 0.0295 in)
Allowable limit
2.55 mm (0.1004 in)
Retaining plate:
Refer to SDS, AT-1209.
SAT867A
SAT868A
SAT869A
SAT870A
REPAIR FOR COMPONENT PARTS
Forward and Overrun Clutches (Cont'd)
AT-1170

Low & Reverse Brake
DISASSEMBLY
1. Check operation of low and reverse brake.
a. Install seal ring onto oil pump cover and install reverse
clutch. Apply compressed air to oil hole.
b. Check to see that retaining plate moves to snap ring.
c. If retaining plate does not contact snap ring,
+D-ring might be damaged.
+Oil seal might be damaged.
+Fluid might be leaking past piston check ball.
2. Remove snap ring, low and reverse brake drive plates, driven
plates and dish plate.
SAT214K
SAT872A
SAT873A
REPAIR FOR COMPONENT PARTS
AT-1171

3. Remove low one-way clutch inner race, spring retainer and
return spring from transmission case.
4. Remove seal rings from low one-way clutch inner race.
5. Remove needle bearing from low one-way clutch inner race.
6. Remove low and reverse brake piston using compressed air.
7. Remove oil seal and D-ring from piston.
INSPECTION
Low and reverse brake snap ring and spring retainer
+Check for deformation, or damage.
Low and reverse brake return springs
+Check for deformation or damage. Also measure free length
and outside diameter.
Inspection standard:
Refer to SDS, AT-1208.
Low and reverse brake drive plates
+Check facing for burns, cracks or damage.
+Measure thickness of facing.
Thickness of drive plate:
Standard value
1.52 - 1.67 mm (0.0598 - 0.0657 in)
Wear limit
1.4 mm (0.055 in)
+If not within wear limit, replace.
SAT382I
SAT876A
SAT829A
SAT845A
REPAIR FOR COMPONENT PARTS
Low & Reverse Brake (Cont'd)
AT-1172

Low one-way clutch inner race
+Check frictional surface of inner race for wear or damage.
+Install a new seal rings onto low one-way clutch inner race.
+Be careful not to expand seal ring gap excessively.
+Measure seal ring-to-groove clearance.
Inspection standard:
Standard value 0.10 - 0.25 mm (0.0039 - 0.0098 in)
Allowable limit 0.25 mm (0.0098 in)
+If not within allowable limit, replace low one-way clutch inner
race.
ASSEMBLY
1. Install needle bearing onto one-way clutch inner race.
+Pay attention to its direction Ð Black surface goes to
rear side.
+Apply petroleum jelly to needle bearing.
2. Install oil seal and D-ring onto piston.
+Apply ATF to oil seal and D-ring.
3. Install piston by rotating it slowly and evenly.
+Apply ATF to inner surface of transmission case.
SAT877A
SAT878A
SAT112B
SAT879A
SAT880A
REPAIR FOR COMPONENT PARTS
Low & Reverse Brake (Cont'd)
AT-1173

4. Install return springs, spring retainer and low one-way clutch
inner race onto transmission case.
5. Install dish plate, low and reverse brake drive plates, driven
plates and retaining plate.
6. Install snap ring on transmission case.
7. Check operation of low and reverse brake clutch piston.
Refer to ªDISASSEMBLYº, AT-1171.
8. Measure clearance between retaining plate and snap ring.
If not within allowable limit, select proper retaining plate.
Specified clearance:
Standard
0.5 - 0.8 mm (0.020 - 0.031 in)
Allowable limit
2.4 mm (0.094 in)
Retaining plate:
Refer to SDS, AT-1210.
9. Install low one-way clutch inner race seal ring.
+Apply petroleum jelly to seal ring.
+Make sure seal rings are pressed firmly into place and
held by petroleum jelly.
SAT881A
SAT872A
SAT885A
SAT884A
REPAIR FOR COMPONENT PARTS
Low & Reverse Brake (Cont'd)
AT-1174