Page 329 of 2395
Low & Reverse Brake
COMPONENTSNBAT0136
SAT160K
SAT872A
DISASSEMBLYNBAT01371. 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,
ID-ring might be damaged.
IOil seal might be damaged.
IFluid might be leaking past piston check ball.
SAT873A
2. Remove snap ring, low and reverse brake drive plates, driven
plates and dish plate.
REPAIR FOR COMPONENT PARTS
Low & Reverse Brake
AT-324
Page 330 of 2395

SAT382I
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.
SAT876A
6. Remove low and reverse brake piston using compressed air.
7. Remove oil seal and D-ring from piston.
INSPECTIONNBAT0138Low and Reverse Brake Snap Ring and Spring RetainerNBAT0138S01ICheck for deformation, or damage.
SAT829A
Low and Reverse Brake Return SpringsNBAT0138S02ICheck for deformation or damage. Also measure free length
and outside diameter.
Inspection standard:
Refer to SDS, AT-357.
SAT845A
Low and Reverse Brake Drive PlatesNBAT0138S03ICheck facing for burns, cracks or damage.
IMeasure thickness of facing.
Thickness of drive plate:
Standard value
Model 4EX16 (2WD)
1.90 - 2.05 mm (0.075 - 0.081 in)
Model 4EX17, 4EX23 (4WD)
1.52 - 1.67 mm (0.0598 - 0.0657 in)
Wear limit
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
REPAIR FOR COMPONENT PARTS
Low & Reverse Brake (Cont'd)
AT-325
Page 331 of 2395
1.40 mm (0.0551 in)
IIf not within wear limit, replace.
SAT877A
Low One-way Clutch Inner RaceNBAT0138S04ICheck frictional surface of inner race for wear or damage.
SAT878A
IInstall a new seal rings onto low one-way clutch inner race.
IBe careful not to expand seal ring gap excessively.
IMeasure 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)
IIf not within allowable limit, replace low one-way clutch inner
race.
SAT112B
ASSEMBLYNBAT01391. Install needle bearing onto one-way clutch inner race.
IPay attention to its direction Ð Black surface goes to rear
side.
IApply petroleum jelly to needle bearing.
SAT879A
2. Install oil seal and D-ring onto piston.
IApply ATF to oil seal and D-ring.
REPAIR FOR COMPONENT PARTS
Low & Reverse Brake (Cont'd)
AT-326
Page 332 of 2395

SAT880A
3. Install piston by rotating it slowly and evenly.
IApply ATF to inner surface of transmission case.
SAT881A
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.
SAT872A
7. Check operation of low and reverse brake clutch piston. Refer
to ªDISASSEMBLYº, AT-324.
SAT885A
8. Measure clearance between retaining plate and snap ring.
If not within allowable limit, select proper retaining plate.
Specified clearance:
Standard
0.8 - 1.1 mm (0.031 - 0.043 in)
Allowable limit
2.7 mm (0.106 in)
Retaining plate:
Refer to SDS, AT-360.
SAT884A
9. Install low one-way clutch inner race seal ring.
IApply petroleum jelly to seal ring.
IMake sure seal rings are pressed firmly into place and
held by petroleum jelly.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
REPAIR FOR COMPONENT PARTS
Low & Reverse Brake (Cont'd)
AT-327
Page 333 of 2395
Forward Clutch Drum Assembly
COMPONENTSNBAT0140
SAT211GA
SAT212G
DISASSEMBLYNBAT01411. Remove snap ring from forward clutch drum.
2. Remove side plate from forward clutch drum.
SAT213G
3. Remove low one-way clutch from forward clutch drum.
4. Remove snap ring from forward clutch drum.
SAT891A
5. Remove needle bearing from forward clutch drum.
REPAIR FOR COMPONENT PARTS
Forward Clutch Drum Assembly
AT-328
Page 334 of 2395
SAT892A
INSPECTIONNBAT0142Forward Clutch DrumNBAT0142S01ICheck spline portion for wear or damage.
ICheck frictional surfaces of low one-way clutch and needle
bearing for wear or damage.
SAT893A
Needle Bearing and Low One-way ClutchNBAT0142S02ICheck frictional surface for wear or damage.
SAT214G
ASSEMBLYNBAT01431. Install needle bearing in forward clutch drum.
2. Install snap ring onto forward clutch drum.
SAT894A
3. Install low one-way clutch onto forward clutch drum by push-
ing the roller in evenly.
SAT895A
IInstall low one-way clutch with flange facing rearward.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
REPAIR FOR COMPONENT PARTS
Forward Clutch Drum Assembly (Cont'd)
AT-329
Page 335 of 2395
SAT887A
4. Install side plate onto forward clutch drum.
5. Install snap ring onto forward clutch drum.
Rear Internal Gear and Forward Clutch Hub
COMPONENTSNBAT0144
SAT896AA
SAT897A
DISASSEMBLYNBAT01451. Remove rear internal gear by pushing forward clutch hub for-
ward.
SAT898A
2. Remove thrust washer from rear internal gear.
REPAIR FOR COMPONENT PARTS
Forward Clutch Drum Assembly (Cont'd)
AT-330
Page 336 of 2395
SAT899A
3. Remove snap ring from forward clutch hub.
SAT900A
4. Remove end bearing.
SAT955A
5. Remove forward one-way clutch and end bearing as a unit
from forward clutch hub.
SAT901A
6. Remove snap ring from forward clutch hub.
SAT902A
INSPECTIONNBAT0146Rear Internal Gear and Forward Clutch HubNBAT0146S01ICheck gear for excessive wear, chips or cracks.
ICheck frictional surfaces of forward one-way clutch and thrust
washer for wear or damage.
ICheck spline for wear or damage.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
REPAIR FOR COMPONENT PARTS
Rear Internal Gear and Forward Clutch Hub (Cont'd)
AT-331