Nissan Frontier D22. Instruction — part 11
OVERALL SYSTEM
AT-13
[RL4R01A]
D
E
F
G
H
I
J
K
L
M
A
B
AT
Cross-sectional View
ECS007IO
LCIA0279E
AT-14
[RL4R01A]
OVERALL SYSTEM
Hydraulic Control Circuits
ECS007IP
WCIA0157E
OVERALL SYSTEM
AT-15
[RL4R01A]
D
E
F
G
H
I
J
K
L
M
A
B
AT
Shift Mechanism
ECS007IQ
The automatic transmission uses compact, dual planetary gear systems to improve power-transmission effi-
ciency, simplify construction and reduce weight.
It also employs an optimum shift control and superwide gear ratios to improve starting performance and accel-
eration during medium and high-speed operation.
Two one-way clutches are also employed: one is used for the forward clutch, and the other for the low clutch.
These one-way clutches, combined with four accumulators, reduce shifting shock to a minimum.
CONSTRUCTION
SAT026HA
AT-16
[RL4R01A]
OVERALL SYSTEM
FUNCTION OF CLUTCH AND BRAKE
CLUTCH AND BAND CHART
*1 : Operates when overdrive control switch is set in OFF position.
*2 : Oil pressure is applied to both 2nd “apply” side and 3rd “release” side of band servo piston. However, brake band does not contract
because oil pressure area on the “release” side is greater than that on the “apply” side.
*3 : Oil pressure is applied to 4th “apply” side in condition *2 above, and brake band contracts.
*4 : A/T will not shift to 4th when overdrive control switch is set to OFF position.
: Operates.
A: Operates when throttle opening is less than 3/16, activating engine brake.
B: Operates during “progressive” acceleration.
C: Operates but does not affect power-transmission.
D: Operates when throttle opening is less than 3/16, but does not affect engine brake.
Clutch and brake compo-
nents
Abbr.
Function
Reverse clutch 6
R/C
To transmit input power to front sun gear 9 .
High clutch 7
H/C
To transmit input power to front planetary carrier 11 .
Forward clutch 16
F/C
To connect front planetary carrier 11 with forward one-way clutch 17 .
Overrun clutch 18
O/C
To connect front planetary carrier 11 with rear internal gear 14 .
Brake band 5
B/B
To lock front sun gear 9 .
Forward one-way clutch 17
F/O.C
When forward clutch 16 is engaged, to stop rear internal gear 14 from rotating in
opposite direction.
Low one-way clutch 19
L/O.C
At D
1
position, to prevent rear internal gear 14 from rotating in opposite direction.
Low & reverse brake 20
L & R/B
To lock rear internal gear 14 (2, 1
2
and 1
1
), to lock front planetary carrier 11 (R posi-
tion).
Shift posi-
tion
Reverse
clutch 6
High
clutch
7
For-
ward
clutch
16
Over-
run
clutch
18
Band servo
For-
ward
one-
way
clutch
17
Low
one-
way
clutch
19
Low &
revers
e
brake
20
Lock-up
Remarks
2nd
apply
3rd
releas
e
4th
apply
P
PARK
POSI-
TION
R
REVERS
E POSI-
TION
N
NEU-
TRAL
POSI-
TION
D *4
1st
D
B
B
Automatic
shift
1
←→ 2
←→ 3
←→ 4
2nd
*1A
B
3rd
A
*2C
C
B
4th
C
*3C
C
2
1st
D
B
B
Automatic
shift
1
←→ 2
2nd
B
1
1st
B
Locks
(held sta-
tionary) in
1st speed
1
← 2
2nd
B
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