1997 ACURA NSX transmission

Description
Dual Mas s Flywhee l
The dua l mas s flywhee l i s designe d t o reduc e th e nois e an d vibration s produce d b y th e engine , clutch , an d transmissio n
durin g acceleratio n an d cruising .
Th e flywhee l assembl y i s actuall y tw o flywheel s i n one , whic h raise s th e inerti a mas s o n bot h th e engin e an d transmis -
sion . Th e inne r an d oute r flywheel s ar e connecte d b y torsio n springs . Thi s combinatio n effectivel y damper s change s i n
engin e spee d befor e the y ar e transmitte d to th e transmission .
Sinc e ther e ar e torsio n spring s betwee n th e flywheels , non e ar e use d in th e clutc h disc , whic h lessen s th e inerti a mas s o n
th e mainshaft . Thi s reductio n o f th e rotatin g inerti a mas s reduce s th e loa d o n th e synchr o rings , allowin g th e transmis -
sio n t o shif t smoother .
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Transmission Assembl y
Removal
Make sur e lift s ar e place d properly , an d
hois t bracket s ar e attache d t o correc t position s (se e
sectio n 1 ).
1 . Chec k an d recor d th e rea r whee l alignmen t (se e
sectio n 18 ).
2 . Disconnec t th e batter y negativ e (- ) an d positiv e (+ )
cable s fro m th e battery .
3 . Drai n transmissio n oil . Reinstal l th e drai n plu g wit h
a ne w washer .
4 . Remov e th e stru t bar .
5 . Remov e th e ai r cleane r assembly . 6
. Remov e th e connector s fro m th e contro l box , an d
remov e th e contro l box . D o no t remov e th e vacuu m
tube s fro m th e contro l box .
7 . Remov e th e wir e harnes s holder , jumpe r connecto r
an d transmissio n groun d cable .
8 . Disconnec t th e back-u p ligh t switch , neutra l posi -
tio n switch , differentia l spee d sensor , revers e lock -
ou t solenoid , an d vehicl e spee d senso r (VSS ) con -
nectors .
9. Disconnec t th e starte r moto r cables , the n remov e
th e starte r motor .
10 . Remov e th e transmissio n mount .
11 . Remov e th e tw o transmissio n housin g bolts .
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Transmission Assembl y
Removal (cont'd )
19. Remov e th e intermediat e shaf t hea t cove r an d th e intermediat e shaf t mountin g bolts .
20 . Pr y th e intermediat e shaf t ou t o f th e differential . Pul l an d remov e it . Coa t al l precisio n finishe d surface s wit h clea n
engin e oi l o r grease . Ti e plasti c bag s ove r th e driveshaf t ends .
21 . Remov e th e parkin g brak e cabl e holde r fro m th e rea r su b frame , an d th e whee l senso r wir e clam p fro m th e lowe r
contro l arm .
22 . Remov e th e flang e bolt , an d separat e th e to e contro l ar m fro m th e sid e bea m (se e sectio n 18 ).
23 . Remov e th e damper fork bol t (se e sectio n 18 ).
24 . Remov e th e adjustin g bolts , an d th e flang e bolt , the n separat e th e lowe r contro l ar m fro m th e sid e beam .
25 . Pr y th e driveshaf t ou t o f th e differential . Pul l an d remov e it . Coa t al l precisio n finishe d surfaces with clea n engin e oi l
o r grease . Ti e plasti c bag s ove r th e driveshaf t ends .
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32. Attach a chain hoist to the transmission hangers.

33. Place a jack under the transmission, and raise the transmission just enough to take weight off mounts.

34. Remove the front engine mounting bolts on the transmission side, and retighten the bolt on the engine side. Loosen

the front engine mounting bolt on the engine side, but do not remove it. After removing the two bolts on the trans-

mission side, be sure to retighten the bolt on the engine side.

35. Remove the rear transmission mounting bolts and engine stiffener.

36. Remove the transmission housing mounting bolts.

37. Pull the transmission away from the engine until it clears the mainshaft, then lower it on the transmission jack.
26. Remove the one of the upper control arm mounting bolt.

27. Remove the lower cover, change wire bracket and upper cover.

28. Remove the shift cable and select cable.

29. Remove the slave cylinder from the transmission. Do not

operate the clutch pedal once the slave cylinder has been

removed.

30. Remove the release fork from the clutch release hanger,

then hang the release fork on the clutch housing.

31. Remove the clutch housing cover.ProCarManuals.com

BEARING OUTER RACE

75 mm THRUST SHIM

Selection.

CLAMP

BACK-UP LIGHT SWITCH

25 N-m (2.5 kgf-m, 18 Ibf-ft)

CLAMP

TRANSMISSION HANGER B

TRANSMISSION HANGER A

CLAMP

CLAMP

WASHER Replace.

OIL FILLER PLUG

44 N-m (4.5 kgf-m, 33 Ibf-ft)

42 x 63 x 12.5 mm OIL SEAL

Replace.

WASHER Replace.

DRAIN PLUG

39 N-m (4.0 kgf-m, 29 Ibf-ft)

36 mm SEALING BOLT

34 N-m (3.5 kgf-m, 25 Ibf-ft)

STRAINER COVER

O-RING Replace.
STRAINER SET SPRING

OIL PUMP STRAINER

14 mm SEALING BOLT

32 N-m (3.3 kgf-m, 24 Ibf-ft)

SPRING (L. 25 mm)

STEEL BALL (3/8 in)

REVERSE LOCKOUT SOLENOID

O-RING Replace.

SELECT LOCK PIN

SELECT LOCK RETURN SPRING

SELECT LOCK COLLAR

SPRING (L. 30 mm)
12 mm SEALING BOLT

22 N-m (2.2 kgf-m, 16 Ibf-ft)

STEEL BALL (5/16 in)

SHIFT LEVER ASSEMBLY

Removal, page 13-23

Installation, page 13-48

NEUTRAL POSITION SWITCH

25 N-m (2.5 kgf-m, 18 Ibf-ft)

TRANSMISSION HOUSING

OIL GUIDE PLATE

82 mm THRUST SHIM

Selection, page 13-46ProCarManuals.com

Transmission Housin g
Remova l
1. Plac e th e clutc h housin g o n tw o piece s o f woo d
thic k enoug h t o kee p th e mainshaf t fro m hittin g th e
workbench .
2 . Remov e th e bac k u p ligh t switch , neutra l positio n
switch , revers e lockou t solenoid , differentia l spee d
senso r an d vehicl e spee d senso r (VSS) .
3 . Remov e th e sealin g bolts , spring s an d stee l balls .
4 . Remov e th e transmissio n housin g attachin g bolt s i n
a crisscros s patter n in severa l steps .
5 . Remov e th e 3 6 m m sealin g bolt . 6
. Expan d th e sna p rin g o n th e countershaf t bal l bear -
ing , an d remov e i t fro m th e groov e usin g a pai r o f
sna p rin g plier .
7 . Separat e th e clutc h housin g fro m th e transmissio n
housing .
8 . Remov e th e thrus t shi m an d oi l guid e plat e fro m
th e transmissio n housing .
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Shift Lever,

Select Lever

Removal

1. Remove the shift spring set plate and shift detent

spring from the transmission housing.

2. Remove the bolt and spring washer.

3. Pull out the shift lever, then remove the shift arm.ProCarManuals.com

Clearance Inspection

1. Check the clearance between the transmission mat-

ing surface of the clutch housing and the oil pump

gear.
3. Check the radial clearance on the pump rotor.

2. Check the axial clearance on the pump rotor.
Inner Rotor-to-Outer Rotor Radial clearance

Standard: 0.14 mm (0.006 in) max.

Service Limit: 0.2 mm (0.008 in)

4. Check the radial clearance between the clutch hous-

ing and the outer rotor.

Clutch Housing-to-Rotor Radial clearance

Standard: 0.1 - 0.2 mm

(0.004-0.008 in)

Service Limit: 0.22 mm (0.009 in)
Standard: 0.3 - 0.8 mm (0.012 - 0.031 in)

Service Limit: 0.9 mm (0.035 in)

Clutch Housing-to-Rotor Axial clearance

Standard: 0.03-0.1 mm

(0.001 - 0.004 in)

Service Limit: 0.15 mm (0.006 in)ProCarManuals.com