1991 ACURA NSX Service Repair Manual

Reverse Idler Gear Shaft

Assembly

Removal

1. Remove the reverse shift arm from the clutch

housing.

REVERSE SHIFT

ARM

CLUTCH HOUSING

2. Shift the reverse shift fork to the driven gear side.

3. Lift the mainshaft assembly and reverse idler gear

shaft assembly, then remove the reverse shift fork

assembly.

REVERSE SHIFT

FORK ASSEMBLYProCarManuals.com

4. Lift the reverse idler gear shaft, then remove the

spring pin from the groove and remove the idler

gear shaft assembly.

REVERSE IDLE GEAR

SHAFT ASSEMBLY

SPRING PINProCarManuals.com

Disassembly/Reassembly
NOTE:
• Th e thrus t needl e bearin g ar e th e sam e size .
• Th e needl e bearin g ar e th e sam e size .
Prior t o reassembling , clea n al l th e part s
in solvent , dr y them , an d appl y lubrican t
to an y contac t surface .
22 x 3 8 x 3 m m THRUS T WASHER
THRUS T NEEDL E BEARIN G
Inspect fo r wea r an d operation .
REVERSE DRIVE N GEA RInspec t fo r wea r an d damage .
NEEDLE BEARIN GInspect fo r wea r an d operation .
THRUST NEEDL E BEARIN GInspect fo r wea r an d operation .
SYNCHRO SPRIN G
SYNCHR O RIN G
Inspection , pag e 13-3 5
REVERS E SYNCHR O SLEEV E
Inspection , pag e 13-13
REVERS E IDL E GEA R SHAF TInspect fo r wea r an d damage .
3 x 6 mm SPRIN G PI NReplace .
THRUST NEEDL E BEARIN GInspect fo r wea r an d operation .
NEEDLE BEARIN GInspect fo r wea r an d operation .
REVERSE DRIV E GEA RInspec t fo r wea r an d damage .
THRUST NEEDL E BEARIN GInspect fo r wea r an d operation .
22 x 38 x 2. 2 m mTHRUS T WASHE R
SPRIN G WASHE R
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Mainshaft, Countershaft,

Differential Assemblies

Removal

1. Remove the change holder assembly from the

clutch housing.

CLUTCH

HOUSING
CHANGE HOLDER

ASSEMBLY

2. Remove the mainshaft assembly and countershaft

assembly with the shift fork from the clutch

housing.

NOTE: Tape the mainshaft splines to protect them

before removing the mainshaft and countershaft

assemblies.

MAINSHAFT

ASSEMBLY
COUNTERSHAFT

ASSEMBLY

SHIFT FORK

ASSEMBLY

Tape the mainshaft

splines.

SPRING

WASHER

CLUTCH HOUSINGProCarManuals.com

3. Remove the differential assembly from the clutch

housing.

DIFFERENTIAL ASSEMBLY

CLUTCH

HOUSINGProCarManuals.com

Shift Lever,

Select Lever

Removal

1. Remove the shift spring set plate and shift detent

spring from the transmission housing.

TRANSMISSION

HOUSING
SHIFT SPRING

SET PLATE

SHIFT DETENT

SPRING

2. Remove the bolt and spring washer.

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

SPRING WASHER
SHIFT ARM

SHIFT LEVER
OIL SEAL

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Shift Lever, Select Lever

Removal

4. Remove the bolt and spring washer.

5. Pull out the select lever, then remove the select

arm.

SPRING WASHER
SELECT ARM

OIL SEAL

Replace.

SELECT LEVERProCarManuals.com

Change Holder Assembly

Disassembly/Reassembly

NOTE: Make sure the return springs are installed properly.

Prior to reassembling, clean all parts in solvent, dry them, and apply lubricant to any contact surfaces.

SHIFT PIECE

LOCK COLLAR
SHIFT PIECE SHAFT

INTERLOCK

CHANGE HOLDER

SELECT RETURN SPRING

5TH/REVERSE RETURN SPRING

3 x 16 mm SPRING PIN

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