NISSAN NAVARA 2005 Repair Owner's Manual

A/T FLUID
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CAUTION:
lWhen wiping away A/T fluid level gauge, always use lint-free paper, not a cloth one.
lTo check A/T fluid level, insert A/T fluid level gauge until
the cap contacts the end of A/T fluid charging pipe, with
A/T fluid level gauge reversed from the normal attach-
ment conditions as shown.
8. Check A/T fluid condition.
lIf ATF is very dark or smells burned, check operation of A/T.
Flush cooling system after repair of A/T.
lIf A/T fluid contains frictional material (clutches, bands, etc.),
replace radiator and flush cooler line using cleaning solvent
and compressed air after repair of A/T. Refer toCO-11,
"RADIATOR".
9. Install the removed A/T fluid level gauge into A/T fluid charging
pipe.
10. Tighten level gauge bolt to the specified torque. Refer toAT-247,
"COMPONENTS".
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AT-14
A/T CONTROL SYSTEM
A/T CONTROL SYSTEM
PFP:31036
Cross-Sectional View (2WD Models)ECS00GVH
1. Front planetary gear 2. Mid planetary gear 3. Rear planetary gear
4. Direct clutch 5. High and low reverse clutch 6. Reverse brake
7. Drum support 8. Forward brake 9. Low coast brake
10. Input shaft 11. Torque converter 12. Oil pump
13. 3rd one-way clutch 14. Front brake 15. Input clutch
16. 1st one-way clutch 17. Control valve with TCM 18. Forward one-way clutch
19. Rear extension 20. Output shaft
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A/T CONTROL SYSTEM
AT-15
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Cross-Sectional View (4WD Models)ECS00GVI
1. Front planetary gear 2. Mid planetary gear 3. Rear planetary gear
4. Direct clutch 5. High and low reverse clutch 6. Reverse brake
7. Drum support 8. Forward brake 9. Low coast brake
10. Input shaft 11. Torque converter 12. Oil pump
13. Front brake 14. 3rd one-way clutch 15. Input clutch
16. 1st one-way clutch 17. Control valve with TCM 18. Forward one-way clutch
19. Adapter case 20. Output shaft
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AT-16
A/T CONTROL SYSTEM
Shift Mechanism
ECS00FWH
The A/T uses compact triple planetary gear systems to improve power transmission efficiency, simplify con-
struction and reduce weight.
It also employs an optimum shift control and super wide gear ratios. They improve starting performance and
acceleration during medium and high-speed operation.
CONSTRUCTION
FUNCTION OF CLUTCH AND BRAKE
1. Front brake 2. Input clutch 3. Direct clutch
4. High and low reverse clutch 5. Reverse brake 6. Forward brake
7. Low coast brake 8. 1st one-way clutch 9. Forward one-way clutch
10. 3rd one-way clutch 11. Front sun gear 12. Input shaft
13. Mid internal gear 14. Front internal gear 15. Rear carrier
16. Rear sun gear 17. Mid sun gear 18. Front carrier
19. Mid carrier 20. Rear internal gear 21. Output shaft
22. Parking gear 23. Parking pawl
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Name of the Part Abbreviation Function
Front brake (1) FR/B Fastens the front sun gear (11).
Input clutch (2) I/CConnects the input shaft (12), the front internal gear (14) and the mid internal gear
(13).
Direct clutch (3) D/C Connects the rear carrier (15) and the rear sun gear (16).
High and low reverse clutch (4) HLR/C Connects the mid sun gear (17) and the rear sun gear (16).
Reverse brake (5) R/B Fastens the rear carrier (15).
Forward brake (6) Fwd/B Fastens the mid sun gear (17).
Low coast brake (7) LC/B Fastens the mid sun gear (17).
1st one-way clutch (8) 1st OWCAllows the rear sun gear (16) to turn freely forward relative to the mid sun gear (17)
but fastens it for reverse rotation.
Forward one-way clutch (9) Fwd OWCAllows the mid sun gear (17) to turn freely in the forward direction but fastens it for
reverse rotation.
3rd one-way clutch (10) 3rd OWCAllows the front sun gear (11) to turn freely in the forward direction but fastens it for
reverse rotation.

A/T CONTROL SYSTEM
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CLUTCH AND BAND CHART
l—Operates
l—Operates during “progressive” acceleration.
l—Operates and effects power transmission while coasting.
l—Line pressure is applied but does not affect power transmission.
l—Operates under conditions shown in HLR/C Operating Condition
l—Operates under conditions shown in LC/B Operating Condition. Delay control is applied during “D” (4,3,2,1)
“N” shift.
l*1: A/T will not shift to 5th when overdrive control switch is set in OFF position.Shift position I/C HLR/C D/C R/B FR/B LC/B Fwd/B1st
OWCFwd
OWC3rd
OWCRemarks
PPARK POSITION
RREVERSE POSI-
TION
NNEUTRAL POSI-
TION
D*11st
Automatic shift
1Û2Û3Û4Û5 2nd
3rd
4th
5th
31st
Automatic shift
1Û2Û3Ü4 2nd
3rd
4th
21st
Automatic shift
1Û2Ü3Ü4 2nd
3rd
4th
11st
Locks (held sta-
tionary in 1st
gear)
1Ü2Ü3Ü4 2nd
3rd
4th
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AT-18
A/T CONTROL SYSTEM
POWER TRANSMISSION
“N” Position
Since both the forward brake and the reverse brake are released, torque from the input shaft drive is not trans-
mitted to the output shaft.
“P” Position
lThe same as for the “N” position, both the forward brake and the reverse brake are released, so torque
from the input shaft drive is not transmitted to the output shaft.
lThe parking pawl linked with the select lever meshes with the parking gear and fastens the output shaft
mechanically.
1. Front brake 2. Input clutch 3. Direct clutch
4. High and low reverse clutch 5. Reverse brake 6. Forward brake
7. Low coast brake 8. 1st one-way clutch 9. Forward one-way clutch
10. 3rd one-way clutch 11. Front sun gear 12. Input shaft
13. Mid internal gear 14. Front internal gear 15. Rear carrier
16. Rear sun gear 17. Mid sun gear 18. Front carrier
19. Mid carrier 20. Rear internal gear 21. Output shaft
22. Parking gear 23. Parking pawl
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A/T CONTROL SYSTEM
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“D”, “3” and “2” Positions 1st Gear
lThe forward brake and the forward one-way clutch regulate reverse rotation of the mid sun gear.
lThe 1st one-way clutch regulates reverse rotation of the rear sun gear.
lThe 3rd one-way clutch regulates reverse rotation of the front sun gear.
lDuring deceleration, the mid sun gear turns forward, so the forward one-way clutch idles and the engine
brake is not activated.
1. Front brake 2. Input clutch 3. Direct clutch
4. High and low reverse clutch 5. Reverse brake 6. Forward brake
7. Low coast brake 8. 1st one-way clutch 9. Forward one-way clutch
10. 3rd one-way clutch 11. Front sun gear 12. Input shaft
13. Mid internal gear 14. Front internal gear 15. Rear carrier
16. Rear sun gear 17. Mid sun gear 18. Front carrier
19. Mid carrier 20. Rear internal gear 21. Output shaft
22. Parking gear 23. Parking pawl
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AT-20
A/T CONTROL SYSTEM
“1 ” Position 1st Gear
lThe front brake fastens the front sun gear.
lThe forward brake and the forward one-way clutch regulate reverse rotation of the mid sun gear.
lHigh and low reverse clutch connects the rear sun gear and the mid sun gear.
lThe low coast brake fastens the mid sun gear.
lDuring deceleration, the low coast brake regulates forward rotation of the mid sun gear and the engine
brake functions.
1. Front brake 2. Input clutch 3. Direct clutch
4. High and low reverse clutch 5. Reverse brake 6. Forward brake
7. Low coast brake 8. 1st one-way clutch 9. Forward one-way clutch
10. 3rd one-way clutch 11. Front sun gear 12. Input shaft
13. Mid internal gear 14. Front internal gear 15. Rear carrier
16. Rear sun gear 17. Mid sun gear 18. Front carrier
19. Mid carrier 20. Rear internal gear 21. Output shaft
22. Parking gear 23. Parking pawl
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A/T CONTROL SYSTEM
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“D” and “3” Positions 2nd Gear
lThe forward brake and the forward one-way clutch regulate reverse rotation of the mid sun gear.
lThe 3rd one-way clutch regulates reverse rotation of the front sun gear.
lThe direct clutch is coupled and the rear carrier and rear sun gear are connected.
lDuring deceleration, the mid sun gear turns forward, so the forward one-way clutch idles and engine
brake is not activated.
1. Front brake 2. Input clutch 3. Direct clutch
4. High and low reverse clutch 5. Reverse brake 6. Forward brake
7. Low coast brake 8. 1st one-way clutch 9. Forward one-way clutch
10. 3rd one-way clutch 11. Front sun gear 12. Input shaft
13. Mid internal gear 14. Front internal gear 15. Rear carrier
16. Rear sun gear 17. Mid sun gear 18. Front carrier
19. Mid carrier 20. Rear internal gear 21. Output shaft
22. Parking gear 23. Parking pawl
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AT-22
A/T CONTROL SYSTEM
“2” and “1” Positions 2nd Gear
lThe front brake fastens the front sun gear.
lThe forward brake and the forward one-way clutch regulate reverse rotation of the mid sun gear.
lThe direct clutch is coupled, and the rear carrier and rear sun gear are connected.
lThe low coast brake fastens the mid sun gear.
lDuring deceleration, the low coast brake regulates forward rotation of the mid sun gear and the engine
brake functions.
1. Front brake 2. Input clutch 3. Direct clutch
4. High and low reverse clutch 5. Reverse brake 6. Forward brake
7. Low coast brake 8. 1st one-way clutch 9. Forward one-way clutch
10. 3rd one-way clutch 11. Front sun gear 12. Input shaft
13. Mid internal gear 14. Front internal gear 15. Rear carrier
16. Rear sun gear 17. Mid sun gear 18. Front carrier
19. Mid carrier 20. Rear internal gear 21. Output shaft
22. Parking gear 23. Parking pawl
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