1991 ACURA NSX Service Repair Manual

2. Instal l th e standar d shi m an d bearin g oute r rac e in -
t o th e transmissio n housin g usin g th e specia l tool s
a s shown .
CAUTION : D o no t us e mor e tha n on e shi m to ad -
jus t th e bearin g preload .
NOTE:
• Instal l th e bearin g oute r rac e squarely .
• Chec k tha t ther e i s n o clearanc e betwee n th e
bearin g oute r race , shi m an d transmissio n
housing .
7 5 m m THRUS T SHIM :
Standard shi m 3
. Lubricat e th e tapere d rolle r bearin g wit h transmis -
sio n oil , the n instal l th e differential .
4 . Instal l th e transmissio n housing .
NOTE : D o no t instal l th e mainshaft , countershaft ,
an d revers e idl e gea r shaft .
Torque : 4 5 N- m (4. 5 kg-m , 3 3 Ib-ft )
5 . Rotat e th e differentia l assembl y i n bot h direction s
t o sea t th e bearings .
6. Measur e th e startin g torqu e o f th e differentia l
assembly wit h a specia l too l an d a torqu e wrenc h
a s shown .
NOTE : Measur e th e bearin g preloa d a t norma l
roo m temperatur e i n bot h directions .
Standard : 2.0-3. 0 N- m (20-3 0 kg-cm ,
17-26 lb-in )
TORQUE WRENC H
DIFFERENTIA LINSPECTION TOOL S07MAJ-PR90100
7. I f th e bearin g preloa d i s no t withi n th e standard ,
selec t th e shi m tha t wil l giv e yo u th e correc t
preload , an d recheck .
NOTE : Changin g on e o f th e shim s t o th e nex t siz e
wil l increas e o r decreas e preloa d abou t 0. 3- 0. 4
N- m (3- 4 kg-cm , 2.60-3.4 7 Ib-in) .
DRIVE R07749-0010000
ATTACHMENT ,72 x 75 m m07746-0010600
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Oil Sea l
Installatio n
1. Instal l th e oi l sea l int o th e transmissio n housin g
usin g th e specia l tool s a s shown .
DRIVER07749-0010000
BEARIN G
DRIVE R ATTACHMEN T
07965-SAO060 0
OIL SEA LReplace .
PILOT, 3 2 x 5 0 m m07MA D-PR9020 0
2. Instal l th e oi l sea l int o th e clutc h housin g usin g th e
specia l tool s a s shown.
DRIVE R07749-0010000
SEAL DRIVE RATTACHMEN T07947-SD90100 or07947-SD90101
OI L SEA L
Replace .
PILOT , 3 2 x 5 0 m m
07MA D-PR9020 0
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Special Tools

Ref.
No.
Tool Number

07GAD — SD40101

07GAE — PG40200

07HAE — PL50100

07LAE — PX40100

07MAD — PR90100
07MAD — PR90200
07MAJ — PR90100

07746 — 0010500

07746 — 0010600

07749 — 0010000

07947 — SD90100 or
07947 — SD90101
07965 — SA00600
Description

Bearing Driver Attachment
Clutch Spring Compressor Bolt Assembly
Clutch Spring Compressor Attachment
Clutch Spring Compressor Attachment
Attachment, 45 x 55 mm I.D.

Pilot, 32 x 50 mm

Differential Inspection Tools
Attachment, 62 x 68 mm
Attachment, 72 x 75 mm

Driver

Seal Driver Attachment

Bearing Driver Attachment
Qty

1
1
1
1
1
1

1

1
1
1
1

1
Page Reference
15-26
15- 20, 24
1 5-20 , 24
15-20, 24
15-19
15-28
15-18, 20, 25, 28
15-26
15-27
15-26, 27, 28
15-28
15-28
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Differential
Illustrated Index

NOTE: If the parts marked with an asterisk (*) ere replaced, the bearing preload must be adjusted (see page 15-26
parts marked with
* 76 mm THRUST SHIM
Selection, Adjustment, page 15-27

* TAPERED ROLLER BEARING

Replacement, page 15-19
Inspect for operation.

FINAL DRIVEN GEAR
Inspect for wear and damage.
CLUTCH DISCInspection, page 15-18
Replacement, page 15-22
CENTRAL GEAR
Inspect for wear and damage

* BEARING OUTER RACE
Replacement, page 15-26

Inipect for wear and damage.

DIFFERENTIAL HOUSING COVER
Inspect for wear and damage.
CLUTCH PLATE
inspection, page 15-18

Replacement, page 15-22

CARRIER ASSEMBLY

Intoect for wear end damage.

102 mm WASHER

CLUTCH PLATES

Inspection, page 15-18
Replacement, page 15-22

112 mm THRUST SHIM

Selection, page 15-22

STOPPER PLATE DIFFERENTIAL HOUSING
Inspect for wear and damage.
SPRING PLATE

60 mm WASHER

* TAPERED ROLLER BEARING
Replacement, page 15-19
Inspect for operation.

* 90 mm WASHER

* OIL GUIDE RING
Replacement, page 15-26

STOPPER CLIP

8 x 1.0 mm SPECIAL BOLT

40 N·m (4.0 kg-m, 29 Ib-ft)
* BEARING OUTER RACE
Replacement, page 15-26
Inspect for wear and damage.
CLUTCH DISCS
Inspection, page 15-18
Replacement, page 15-22ProCarManuals.com

Preset Torque

Inspection
On-Car:

1. Lift up right rear wheel,
and place the safety stand.

(Lift and Support Points, see section 1).
2. Block the other three wheels.
3. Measure preset torque clockwise using a torque wrench as shown.

Standard:
60–140 N·m

(6–14 kg-m, 43–101 Ib-ft)

Service Limits: 30 N·m (3 kg-m, 22 Ib-ft)

TORQUE WRENCH
RIGHT REAR WHEEL SAFETY STAND

4. If preset torque is less than the service limit, replace the clutch discs with new ones.
NOTE: Adjust the thrust shim whenever the clutch
discs are replaced (see page 15-22).
Assembly:

1. Place one special tool in a vise. Place the left side of the differential assembly on the special tool, then
preset the differential with 3 – 5 rotations, both
clockwise and counterclockwise.

DIFFERENTIAL
INSPECTION TOOLS

07MAJ– PR90100

2. Measure preset torque clockwise using a torque wrench as shown.

Standard: 60–140 N·m
(6–14 kg-m, 43–101 Ib-ft)

Service Limit: 30 N·m (3 kg-m, 22 Ib-ft)

TORQUE WRENCH
DIFFERENTIAL
INSPECTION TOOLS

07MAJ – PR90100

3. If preset torque is less than the service limit, replace the clutch discs with new ones.
NOTE: Adjust the thrust shim whenever the clutch

discs are replaced (see page 15-22).
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Bearing
Replacemen t
NOTE:
• Th e bearin g an d oute r rac e shoul d b e replace d a s a
set .
• Inspec t an d adjus t th e bearin g preloa d wheneve r th e
bearin g i s replaced .
1 . Remov e th e tapere d rolle r bearing s usin g th e bear -
in g pullers .
BEARIN G PULLE R(Commerciall yavailable)
TAPERE D ROLLE R
BEARIN G
BEARIN G PULLE R
(Commerciall y
available )
TAPERE D ROLLE R
BEARIN G
2. Instal l th e tapere d rolle r bearing s usin g a specia l too l
an d a pres s a s shown .
NOTE : Pres s th e tapere d rolle r bearing s squarel y
until the y botto m agains t th e case .
Transmissio n Housin g Side :
STEE L PLAT EPRESS
TAPERE D ROLLE R
BEARIN G
Clutch Housin g Side :
STEE L PLAT E
TAPERE D ROLLE R
BEARIN G
ATTACHMENT ,45 x 5 5 m m I.D .07MA D-PR9010 0
PRESS
ATTACHMENT ,45 x 5 5 m m I.D .07MAD-PR90100
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Differential
Disassembl y
1. Hol d th e differentia l i n a benc h vis e usin g a specia l
tool , the n remov e th e differentia l housin g mountin g
bolt s i n a crisscros s patter n i n severa l steps .
BENCH VIS E
DIFFERENTIA LINSPECTION TOOL S07MAJ-PR90100
2. Remov e th e differentia l housing , the n instal l th e
specia l tool s o n th e stoppe r plat e a s shown .
CLUTCH SPRIN GCOMPRESSO RATTACHMENT
07LA E-PX4010 0
STOPPE R PLAT E
DIFFERENTIA LHOUSING
CLUTC H SPRIN G
COMPRESSO RATTACHMENT07GAE-PG4020 0
CLUTCH SPRIN GCOMPRESSO RBOLT ASSEMBL Y07HAE-PL5010 0
3. Compres s th e sprin g plate .
DIFFERENTIA LHOUSING
4. Remov e th e stoppe r clip .
5 . Remov e th e specia l tools , an d the n remov e th e stop -
pe r plate , sprin g plate , an d 6 0 m m washer .
STOPPE R CLI P
STOPPE R PLAT E
SPRING PLAT E
6 0 m m WASHE R
DIFFERENTIA LHOUSING
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6. Remove the 112 mm thrust shim, clutch discs,

clutch plates, and 102 mm washer.

112 mm

THRUST SHIM

CLUTCH PLATES
CLUTCH DISCS

102 mm WASHER

7. Remove the carrier assembly, central gear, clutch

plate, and clutch disc.

CARRIER

ASSEMBLY

CENTRAL GEAR

CLUTCH PLATE

CLUTCH DISC
8. Screw two 8 x 1.0 mm bolts into the threaded holes

in the differential housing cover to push it away from

the final driven gear.

NOTE: Turn each bolt two turns at a time to pre-

vent cocking the differential housing cover exces-

sively.

THREADED HOLES
FINAL

DRIVEN

GEAR

DIFFERENTIAL

HOUSING

COVER

8 x 1.0 mm

BOLTSProCarManuals.com