Honda Acura NSX 1991, Service Manual

Page: 469 / 1420

PROBABLE CAUSE
1.
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35.
36.
37.
Shift cable broken/out of adjustment.
Linear solenoid shim too thin.
Linear solenoid shim too thick.
Wrong type ATF.
Idle rpm too low/high.
Oil pump worn or binding.
Pressure requlator stuck.
1 st clutch defective.
2nd clutch defective.
3rd clutch defective.
4th clutch defective.
1st hold clutch defective.
M o d u l a t o r v a l v e s t u c k .
Throttle B valve stuck.
ATF strainer clogged.
Torque converter defective.
Torque converter check valve stuck.
1-2 shift valve stuck.
2-3 shift valve stuck.
3-4 shift valve stuck.
EAT D inhibitor valve stuck.
Clutch pressure control valve stuck.
2nd orifice control valve stuck.
3rd orifice control valve stuck.
3-2 valve stuck.
3rd valve stuck.
4th exhaust valve stuck.
1 st accumulator defective.
2nd clutch accumulator defective.
3rd clutch accumulator defective.
accumulator defective.
1st hold clutch accumulator defective.
Servo valve stuck.
L o c k - u p c l u t c h t i m i n g v a l v e s t u c k .
L o c k - u p c l u t c h s h i f t v a l v e s t u c k .
L o c k - u p c l u t c h c o n t r o l v a l v e s t u c k .
Shift
NOTES
L.
M.
If
the oil screen is clogged with particles of steel or aluminum, inspect the oil pump and differential
clutch and planetary gear assembly. If both are
OK
and no cause for the contamination is found,
replace the torque converter.
If the 1st
clutch
guide in the end cover is scored by the mainshaft, inspect the ball bearing
for excessive movement in the trnsmisison housing. If
OK,
replace the end cover as it is dented.
The O-ring under the guide is probably worn.
N. Replace the mainshaft if the bushings for the 1st and 4th are loose or damaged. If the
1st
is damaged or out
of round, replace it. If
the
4th is damaged or out of
I
0 .
round, replace the end cover.
A worn or damaged sprag clutch is mostly a result of shifting the trans in D while the wheels