Nissan Silvia. Manual — part 5
POWER TRANSMISSION
=NMAT0012S04
“N” and “P” Positions
NMAT0012S0401
I
“N” position
No control members operate. Power from the input shaft is not transmitted to the output shaft since the
clutch does not operate.
I
“P” position
Similar to the “N” position, no control members operate. The parking pawl interconnected with the select
lever engages with the parking gear to mechanically hold the output shaft so that the power train is locked.
SAT039J
GI
MA
EM
LC
EC
FE
CL
MT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
OVERALL SYSTEM
Shift Mechanism (Cont’d)
AT-17
“1
1
” Position
=NMAT0012S0406
Forward clutch
Forward one-way clutch
Overrun clutch
Low and reverse brake
As overrun clutch engages, rear internal gear is locked by the operation of low and
reverse brake.
This is different from that of D
1
and 2
1
.
Engine brake
Overrun clutch always engages, therefore engine brake can be obtained when decelerat-
ing.
SAT100J
OVERALL SYSTEM
Shift Mechanism (Cont’d)
AT-18
“D
1
” and “2
1
” Positions
=NMAT0012S0402
Forward one-way clutch
Forward clutch
Low one-way clutch
Rear internal gear is locked to rotate counterclockwise because of the functioning of
these three clutches. (Start-up at D
1
)
Overrun clutch
engagement conditions
(Engine brake)
D
1
: Overdrive control switch in “OFF”
Throttle opening less than 3/16
2
1
: Throttle opening less than 3/16
At D
1
and 2
1
positions, engine brake is not activated due to free turning of low one-way
clutch.
SAT096J
GI
MA
EM
LC
EC
FE
CL
MT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
OVERALL SYSTEM
Shift Mechanism (Cont’d)
AT-19
“D
2
”, “2
2
” and “1
2
” Positions
=NMAT0012S0403
Forward clutch
Forward one-way clutch
Brake band
Rear sun gear drives rear planetary carrier and combined front internal gear. Front inter-
nal gear now rotates around front sun gear accompanying front planetary carrier.
As front planetary carrier transfers the power to rear internal gear through forward clutch
and forward one-way clutch, this rotation of rear internal gear increases the speed of rear
planetary carrier compared with that of the 1st speed.
Overrun clutch
engagement conditions
D
2
: Overdrive control switch in “OFF”
Throttle opening less than 3/16
2
2
: Throttle opening less than 3/16
1
2
: Always engaged
SAT097J
OVERALL SYSTEM
Shift Mechanism (Cont’d)
AT-20
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