Acura NSX 1991 Manual page 324

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Mainshaft Assembly
Clearance Inspection
1.
Measure the clearance between 2nd and 3rd gears.
Standard:
0.06 — 0.21 mm
(0.002-0.008 in)
Service Limit: 0.3 mm (0.012 in)
2.
If the clearance exceeds the service limit, measure
the thickness of 3rd gear.
Standard:
35.92 — 35.97 mm
(1.414-1.416 in)
Service Limit: 35.80 mm (1.409 in)
If the thickness of 3rd gear is less than the service
limit, replace 3rd gear with a new one.
If the thickness of 3rd gear is within the service
limit, replace the 3rd/4th synchro hub with a new
one.
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2ND GEAR
3RD GEAR
3RD GEAR
3.
Measure the clearance between 4th gear and the
spacer collar.
Standard:
0.06—0.21 mm
(0.002-0.008 in)
Service Limit: 0.3 mm (0.012 in)
4TH GEAR
4.
If the clearance exceeds the service limit, measure
distance
on the spacer collar.
Standard:
29.53 — 29.58 mm
(1.163-1.165 in)
Service Limit: 29.51 mm (1.162 in)
SPACER
COLLAR
5.
If distance
is less than the service limit, replace
the spacer collar with a new one.
If distance
is within the service limit, measure
the thickness of 4th gear.
Standard:
35.92-35.97 mm
(1.414-1.416 in)
Service Limit: 35.80 mm (1.409 in)
If the thickness of 4th gear is less than the service
limit, replace 4th gear with a new one.
If the thickness of 4th gear is within the service
limit, replace the 3rd/4th synchro hub with a new
one.
5TH GEAR
4TH GEAR
"SIDE
4TH
GEAR

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