1991 ACURA NSX torque

Illustrated Index

Torque Converter Housing/Valve BodyProCarManuals.com

ATF STRAIER Clean or replace.

O-RING
Replace.

ACCUMULATOR COVER
LOCK WASHER
Replace.
SERVO DETENT BASE
SERVO VALVE BODY
SERVO SEPARATOR PLATE CHECK BALLS (7/32) 7
SECONDARY VALVE BODY FILTER
Replace.
SECONDARY VALVE BODY
SECONDARY SEPARATOR PLATE
DOWEL PIN
LOCK-UP VALVE BODY
LOCK-UP SEPARATOR PLATE
DOWEL PIN REGULATOR VALVE BODY
O-RING
Replace.
STATOR SHAFT ASSEMBLY
STOPPER PIN
MAIN VALVE BODY FILTER
Replace. CHECK BALLS (7/32) 7
MAIN VALVE BODY
ONE-WAY RELIEF VALVE SPRING
ONE-WAY RELIEF VALVE
OIL PUMP DRIVEN GEAR
OIL PUMP DRIVE GEAR
OIL PUMP DRIVEN GEAR SHAFT
DOWEL PIN MAIN SEPARATOR PLATE
TORQUE CONVERTER CHECK VALVE
TORQUE CONVERTER CHECK VALVE SPRING ATF LUBRICATION PIPE
2ND ACCUMULATOR BODY
LSD RELIEF VALVE SPRINGLSD RELIEF VALVE
CONTROL SHAFT
CONTROL LEVER
OIL SEAL
Replace.
LOCK WASHER
Replace.

CHANGE SHAFT
CHANGE SHAFT CAP
SHIFT CONTROL SOLENOID VALVE ASSEMBLY
SHIFT CONTROL SOLENOID FILTER/GASKET
Replace.
LOCK-UP CONTROL SOLENOID VALVE ASSEMBLY
LOCK-UP CONTROL SOLENOID FILTER/GASKET
Replace.
VEHICLE SPEED SENSOR ASSEMBLY
O-RING Replace.

SECONDARY SHAFT NEEDLE BEARING
Replace.

OIL GUIDE PLATE
Replace.

COUNTERSHAFT NEEDLE BEARING
Replace.

OIL GUIDE PLATE
Replace.

MAINSHAFT BALL BEARING
Replace.

MAINSHAFT OIL SEAL
Replace.

SEALING WASHER
Replace.

4TH OIL GUIDE PLATE/PIPE
3RD OIL GUIDE PLATE
TORQUE SPECIFICATIONProCarManuals.com

Replace.
7 Bolts
5 Bolts
2 Bolts

2 Bolts

Replace.

2 Bolts
5 Bolts
4 Bolts
7 Bolts
Valve Body

Removal

NOTE:

1. Remove the valve body in the following numbered sequence.

CAUTION: Do not use a magnet to remove the check balls; it may magnetize the balls.
Clean all parts thoroughly in solvent or carburetor cleaner and dry with compressed air. Blow out all passages.

Accumulator covers are spring loaded; to prevent stripping the threads in the torque converter housing, press down

on the accumulator covers while unscrewing the bolts in a crisscross pattern.ProCarManuals.com

NOTE: All check balls are the same size (7/32)#7.
TORQUE CONVERTER
CHECK VALVE


TORQUE CONVERTER
CHECK VALVE SPRING TORQUE CONVERTER
HOUSING
CHECK BALL
MAIN VALVE

BODY

CHECK BALL
CHECK BALL
1ST CHECK

BALL

4TH CHECK

BALL

Unit of length: mm (in)

SPRING SPECIFICATIONS

Spring

No.

1-2 shift spring

3-4 shift spring

Relief valve spring
One-way relief valve spring
2-3 shift spring

Torque converter check valve spring
Wire Dia.
O.D.Standard (New)
Free Length

0.9 (0.035)

0.8 (0.031)
1.1 (0.043)

0.9 (0.035)

0.8 (0.031)
1.1 (0.043)
8.6 (0.339)

7.0 (0.276)

8.4 (0.331)

6.4 (0.252)
7.0 (0.276)

8.4 (0.331)
40.4 (1.591)
43.7 (1.720)
44.4 (1.748)

25.1 (0.988)

43.7 (1.720)
41.8 (1.646)
No. of Coils
14.5
21.2
19.5
11.9
21.2 15.7

MAIN VALVE

BODY

Sectional view.
ProCarManuals.com

9. Torque the countershaft locknut to 30 N
.
m (3.0 kg-m,

22 Ib-ft).

COUNTERSHAFT BEARING 11. If the clearance is out of tolerance, select and install a

new cotter retainer.

THICKNESS
COTTER RETAINER
COTTER RETAINER
12. After replacing the cotter retainer, make sure that
the clearance is within tolerance.

LOCK NUT

30 N
.
m

(3.0 kg-m, 22 Ib-ft)
10. Measure the clearance between 4th gear and reverse selector hub with a feeler gauge.
NOTE: Take measurements in at least three places,
and take the average as the actual clearance.
FEELER GAUGE
COTTER RETAINER 4TH GEAR REVERSE SELECTOR HUBProCarManuals.com

Torque Converter Housing Bearings
Mainshaft Bearing Replacement
1. Drive out the mainshaft bearing and oil seal using the special tools as shown. 3. Install the new oil seal flush with the housing using
the special tools as shown.

DRIVER
07749–0010000

ATTACHMENT,
72 x 75 mm

07746–0010600

ATTACHMENT,

07947–6340500
TORQUE CONVERTER HOUSING

2. Drive in the new mainshaft bearing until it bottoms in the housing, using the special tools as shown.

DRIVER
07749–0010000

ATTACHMENT,
62 x 68 mm
07746–0010500
DRIVER

07749–0010000ProCarManuals.com

Manual Valve Detent Spring


Parking Brake Stopper

Replacement/Adjustment

NOTE: Select the appropriate manual valve detent
spring when below parts are replaced. Manual Valve
Manual Valve Detent Spring
Manual Valve Lever of Control Shaft
1. Install the main valve body, including the oil pump gears, onto the torque converter housing and tight-
en to 12 N .
m (1.2 kg-m, 9 Ib-ft).
See page 14-147.

2. Install the control shaft.

3. Install the manual valve detent spring on the main
valve body and tighten to 14 N .
m (1.4 kg-m, 10

Ib-ft).

4. Set the manual valve to N position. 5. Measure the distance between the main valve body and manual valve as shown.
Inspection/Adjustment
1. Set the parking shift arm in the position.

2. Measure the distance between the face of the park- ing pawl shaft and face of the parking shift arm roller

pin as shown.

PARKING PAWL SHAFT

DISTANCE

PARKING PAWL

ROLLER PIN

PARKING

SHIFT ARM

PARKING BRAKE STOPPER

MANUAL VALVE

MAIN VALVE BODY

DISTANCE
3. If the measurement is out of tolerance, select and
install the appropriate parking brake stopper from
the table below.

PARKING BRAKE STOPPER

MANUAL VALVE

DETENT SPRING

CONTROL

N position

MANUAL VALVE

LEVER

5. If the measurement is out of tolerance, select the appropriate manual valve detent spring using table

below, then install it and recheck.

PARKING BRAKE STOPPER

MANUAL VALVE DETENT SPRING

4. After replacing the parking brake stopper, makesure the distance is within torelance.

LENGTH

SHAFTProCarManuals.com

Transmission

Reassembly

NOTE: Coat all parts with ATF.
1. Reassemble the valve bodies in the following numbered sequence.

CAUTION: To prevent stripping the threads, press down on the accumulator cover while installing the bolts.

TORQUE:
6 x 1.0 mm: all bolts except : 12 N
.
m (1.2 kg-m, 9 Ib-ft)
6x1.0 mm: : 14 N
.
m (1.4 kg-m, 10 Ib-ft)

7 Bolts
2 Bolts

5 Bolts
2 Bolts

4 Bolts

NOTE: Install the oil pump driven gear with

its chamfered side facing down.
NOTE: Make sure the pump drive gear

rotates smoothly in the normal operating

direction and the pump shaft moves

smoothly in the axial and normal operating

directions.

CAUTION: If the pump gear and pump
shaft do not move freely, loosen the valve
body bolts, realign the shaft, and then
retighten to the specified torque. Failure to
align the pump shaft correctly will result in seized pump gear or pump shaft.

DRIVE

GEAR

DRIVEN

(cont'd)

8x
1.25
mm

18 N .
m

(1.8 kg-m.
6 x 1.0 mm

(1.4 kg-m.

2 Bolts

13 Ib-ft)
GEAR
Chamfered side faces

separator plate.
DRIVEN

GEAR

DRIVEN GEAR

SHAFT
DRIVE GEARProCarManuals.com