1991 ACURA NSX gearbox

NOTE: Before removing the gearbox, place a stand jack

under the gearbox and front crossbeam to lightly sup-

port them. Lower the gearbox together with the front

crossbeam.

18. Remove the flange bolts and nuts of the gearbox

and front crossbeam.

10 x 97 mm

FLANGE BOLT

(Crossbeam bracket

to Front crossbeam)
FLANGE NUTS

60 N-m (6.0 kg-m, 43 Ib-ft)

10 x 97 mm

FLANGE BOLT

(Crossbeam bracket

to front crossbeam)

/

FLANGE NUT

60 N-m

(6.0 kg-m,

43 Ib-ft)

LEFT SIDE:
10 x 97 mm

FLANGE BOLT

(Crossbeam bracket

to Front crossbeam)
FLANGE NUT

60 N-m

(6.0 kg-m, 43 Ib-ft)

10 x 97 mm

FLANGE BOLT

60 N-m

(6.0 kg-m, 43 Ib-ft)

(Gearbox to front

crossbeam)

10 x 68 mm

FLANGE BOLT

60N.m

(6.0 kg-m. 43 Ib-ft)

(Front crossbeam to

crossbeam bracket)

RIGHT SIDE:

10 x 84 mm

FLANGE BOLT

60 N-m

(6.0 kg-m, 43 Ib-ft)

(Gearbox to front

crossbeam)

Corrosion resistant bolt/nut
10 x 68 mm

FLANGE BOLT

60N.m

(6.0 kg-m, 43 Ib-ft)

(Front crossbeam

to crossbeam bracket)
19. Lower the gearbox and front crossbeam with care

so as not to interfere with the radiator pipe.

NOTE: The crossbeam is attached to the crossbeam

bracket with knock pins. Remove the crossbeam by

lightly taping on it with a plastic hammer, then

remove the gearbox.

LEFT CROSSBEAM BRACKET

RIGHT CROSSBEAM

BRACKET

STEERING

GEARBOX

BRACKET

CUSHION B

MOUNT BASE

FRONT CROSSBEAM
GEARBOX

ASSEMBLY

20. When installing the crossbeam to the crossbeam

bracket, be sure to align the holes in the crossbeam

with the knock pins on the crossbeam bracket.

CROSSBEAM

BRACKET

FRONT CROSSBEAM
KNOCK PINProCarManuals.com

Illustrated Inde x
CAUTION : D o no t tr y to disassembl e th e powe r steerin g gearbox . I f th e gearbo x is faulty , replac e it a s a n assembly .
Corrosion resistan t bolt/nu t10 x 97 m mFLANG E BOL T
GEARBO X ASSEMBL Y STEERIN
G
GEARBO X BRACKE T
CUSHION BChec k fo r damage .
10 x 84 m mFLANG E BOL T60 N- m(6.0 kg-m , 4 3 Ib-ft )
10 x 97 m mFLANG E BOL T60 N- m(6.0 kg-m , 4 3 Ib-ft )
MOUN T BAS E
10 m m FLANG E NU T60 N- m(6.0 kg-m . 4 3 Ib-ft )
FLANG E BOL T10 N- m(1.0 kg-m , 7 Ib-ft )
GROUN D CABL E
STO P WASHE R
LOC K WASHE R
Replace.RACK EN D
TIE-ROD EN D
STEERIN
G GROMME T
Chec k fo r damage .
WIR E HARNES S STA Y
1 0 m m FLANG E NU T
60 N- m(6.0 kg-m , 4 3 Ib-ft )
FLANG E BOL T10 N- m(1.0 kg-m , 7 Ib-ft )
MOUN T COLLE R
MOUNT BUSHIN GCheck fo r damage .
FLANGE BOL T
10 N- m(1.0 kg-m , 7 Ib-ft )
TERMINA L
GUAR D
COTTE R PI N
Replace .
CASTL
E NU T
44 N- m(4.4 kg-m , 3 2 Ib-ft )
TUB E CLAM P
BOOT
Replace .
SE T RIN G
STEERIN
G GREAS E
(Honda P/ N 08733-B070E )Coat th e insid e o f th e boot .
SILICON E GREAS E
Coa t th e slidin g surfac e
o f th e rac k end .
TIE-RO DLOCKNU T44 N.m(4.4 kg-m , 3 2 Ib-ft )
5
5 N- m (5. 5 kg-m , 4 0 Ib-ft )
BOO T
Chec k fo r damage .
ProCarManuals.com

Steering Gearbo x
Inspectio n
1. Carefull y clam p th e gearbo x i n a vis e wit h sof t jaws .
2 . Remov e th e boo t bands .
BOOT BAN DReplace .
3. Pul l th e boot s awa y fro m th e end s o f th e gearbox ,
the n unben d th e tie-ro d loc k washers .
4 . Hol d th e rac k wit h a wrench , an d unscre w th e tie -
rod s wit h anothe r wrench .
LOCK WASHE RReplace.
• Preloa d inspection :
Slide th e steerin g rac k in th e cylinde r unti l th e en d o f
th e rac k project s 6 0 m m (2. 4 in ) fro m th e cylinde r
end . Inspectio n is mad e nea r thi s rac k position .
CYLINDE R
RACK
Instal l th e specia l too l o n th e pinio n shaf t an d chec k
th e preloa d wit h a sprin g scale .
I f th e preloa d i s ou t o f th e specification , adjus t th e
rac k guide .
Preloa d 3 0 N (3 kg , 6. 6 Ibs ) maximu m
STEERIN G INSPECTIO N AR M0797 4 - SD9000 0
Rac k guid e scre w adjustment :
— Loose n th e rac k guid e scre w locknut .
— Tighten , loose n an d retighte n th e rac k guid e scre w
tw o time s t o 4 N- m (0. 4 kg-m , 2. 9 Ib-ft) , the n bac k
it of f 20 °
ProCarManuals.com

Lubrication Points

For the details of lubrication points and types of lubricants to be applied, refer to the Illustrated Index and various workprocedures (such as Assembly/Reassembly, Replacement, Overhaul, Installation, etc.) contained in each section.

No.

LUBRICATION POINTS

LUBRICANT

Engine
Transmission

Manual

Automatic

Brake Line (including anti-lock brake system)
Clutch Line Shift lever pivots (M/T)Release fork (M/T)Steering gearbox (Manual)
Steering boots Steering column bushings
Steering ball jointsSelect lever (A/T)
Pedal linkage Intermediate shaft
Brake master power pushrod
Trunk hinges Door hinges upper and lower
Door opening detents
Fuel filler lid
Front hood hinges and latch
Clutch master cylinder pushrod
Tilt lever

Parking brake cable end
Throttle cable end Rear hatch latchRetractable headlight pin contact area
Shift cable end and select cable end
Caliper Piston seal, Dust seal, Caliper pin, Piston
Recommended Engine Oil
API Service Grade: SG Fuel Efficient Oil:
Identified by the words, "Energy Conserving II" API Service Grade: SG
SAE viscosity: 10 W—30 recommended
Fuel Efficient Oil:
Identified by the words, "Energy Conserving II"
SAE Viscosity: See chart below.
API Service Grade: SF or SG SAE Viscosity: See chart below.
Honda Premium Formula Automatic Transmission
Fluid or an equivalent DEXRON® II type automatic

transmission fluid

Brake fluid DOT3 or DOT4
Brake fluid DOT3 or DOT4
Silicone grease with molybdenum disulfide
Multi-purpose grease
Silicone grease Recommended Manual Transmission Oil
API Service Grade: SF or SG
transmission oil viscosity forambient temperature ranges
Engine oil viscosity for
ambient temperature rangesProCarManuals.com

Inspection

Steering Wheel Rotational Play
1. Place the front wheels in a straight ahead position and measure the distance the steering wheel can be
turned without moving the front wheels.

2. If the
play
exceeds
the
service
limit,
check
all
steer- ing components.
Service Limit: 5 mm (0.2 in) maximum
Steering Effort Check (Manual Steering Only)
Operation Standard

Turn the steering wheel with a spring scale. Read the
measurement when the front wheels or steering wheel
start to move.Power Assist Check With Car
Parked (Electrical Power Steering

Only)

1. Raise the front wheels off the ground (see sec-
tion 1).

2. Turn the steering wheel with a spring scale and check its reading.
3. If the reading exceeds the service limit, adjust the steering gearbox as shown on the next page.
Service Limit: 20 N (2 kg, 4 Ibs) maximum Condition
Without power assist (engine off)
With power assist (engine running) Stationary Swing
operation load

120 N (12 kg, 26
Ibs)
maximum

42 N
(4.2
kg, 9.3
Ibs) maximumProCarManuals.com

Steering Gearbox Adjustment

Serious burns may result if you touch any
cooling components when the cooling system is hot.
Manual Steering:
1. Loosen the rack guide screw locknut.
2. Tighten, loosen and retighten the rack guide screw
two times to 5 N .
m (0.5 kg-m, 3.6 Ib-ft), then back

it off
15°.
RACK GUIDE SCREW
3. Tighten the locknut on the rack guide screw.
4. Check for tight or loose steering through the com- plete turning travel.
5. Recheck steering effort.
RACK GUIDE SCREW
LOCKNUT
68 N ·
m (6.8 kg-m, 49 Ib-ft)
CROW FOOT LOCKNUT
Electrical Power Steering:
1. Loosen the rack guide screw locknut.
2. Tighten, loosen and retighten the rack guide screw two times to 4 N·m (0.4 kg-m, 2.9 Ib-ft), then back
LOCKNUT
RACK GUIDE SCREW
3. Tighten the locknut on the rack guide screw with the special tool.
4. Check for tight or loose steering through the com- plete turning travel.
5. Recheck steering assist.
LOCKNUT
25 N .
m (2.5 kg-m, 18 Ib-ft) RACK GUIDE SCREW
LOCKNUT WRENCH. 40 mm

07916-SA50001
it off 20

WRENCH,ProCarManuals.com

Installation

CAUTION:
All SRS wiring harnesses are covered with yellow
outer insulation.

Replace the entire affected SRS harness assembly if

it has an open circuit or damaged wiring.

1. Slip the lower end of the steering joint onto the pin- ion shaft.
2. Reposition the column assembly on the hanger bracket and loosely tighten with 8 mm flange nuts.
COLUMN ASSEMBLY
8 mm FLANGE NUTS
16 N.m

(1.6 kg-m, 12 lb-ft)
3. Tighten to the steering joint bolts.

NOTE:
Be sure that the lower bolt is securely in the
groove in the steering gearbox pinion shaft. Be sure the pinion shaft and the steering column
shaft are aligned; the joint should slip on freely.
If not reposition the steering rack to correct the
misalignment.
STEERING JOINT

Slip the upper end of the steering joint onto the steering

shaft (line up the bolt hole with the groove around the
shaft) and loosely install the upper bolt. STEERING COLUMN
SHAFTPull down while

tightening bolt.

Bolt must line up with flat

on shaft.

STEERING GEARBOX

PINION SHAFT

TOOTHED LOCK

WASHERS
STEERING JOINT BOLTS
22 N ·
m (2.2 kg-m, 16 Ib-ft) 4. Install the column holder with the 8 mm bolts.
COLUMN

HOLDER

8 mm BOLTS

22 N.m

(2.2 kg-m, 16 Ib-ft)
5. Tighten the 8 mm flange nuts to the specified
torque.

6. Install the steering joint cover with the clamps and clips.

CLIP

STEERING JOINT COVER
CLAMPS

(cont'd)ProCarManuals.com

Component Location
Index

NOTE:
If an intact airbag assembly has been removed from a scrapped car or has been found defective or damaged during
transit, storage or service, it should be deployed (see section 23). Before removing the gearbox, remove the ignition key to lock the steering shaft from turning.
After installing the gearbox, check the wheel alignment and adjust if necessary.
STEERING WHEEL/AIRBAG ASSEMBLY

Removal, page 17-8

Disassembly, page 17-9

Installation, page 17-10

STEERING COLUMN
Removal, page 17-12
Inspection, page 17-14 Installation, page 17-15
STEERING GEARBOX
Removal/Installation, page 17-19 Disassembly, page 17-22

Inspection, page 17-21

Reassembly, page 17-25ProCarManuals.com