Infiniti M45 (Y34). Manual — part 33
A/T FLUID
AT-17
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14. Blow compressed air regulated to 5 - 9 kg/cm
2
(70 - 130 psi) through each steel line from the cooler side
back toward the transmission for 10 seconds to force out any remaining fluid.
15. Ensure all debris is removed from the steel cooler lines.
16. Ensure all debris is removed from the banjo bolts and fittings.
17. Perform
AT-17, "A/T FLUID COOLER DIAGNOSIS PROCEDURE"
A/T FLUID COOLER DIAGNOSIS PROCEDURE
NOTE:
Insufficient cleaning of the cooler inlet hose exterior may lead to inaccurate debris identification.
1.
Position an oil pan under the automatic transmission's inlet and outlet cooler hoses.
2.
Clean the exterior and tip of the cooler inlet hose.
3.
Insert the extension adapter hose of a can of the Transmission
Cooler Cleaner (Nissan P/N 999MP-AM006) into the cooler out-
let hose.
CAUTION:
●
Wear safety glasses and rubber gloves when spraying
the Transmission Cooler Cleaner.
●
Spray the Transmission Cooler Cleaner only with ade-
quate ventilation.
●
Avoid contact with eyes and skin.
●
Do not breath vapors or spray mist.
4.
Hold the hose and can as high as possible and spray the Trans-
mission Cooler Cleaner in a continuous stream into the cooler outlet hose until fluid flows out of the cooler
inlet hose for 5 seconds.
5.
Tie a common white, basket-type coffee filter to the end of the
cooler inlet hose.
6.
Insert the tip of an air gun into the end of the cooler outlet hose.
7.
Wrap a shop rag around the air gun tip and end of cooler outlet
hose.
8.
Blow compressed air regulated to 5 - 9 kg/cm
2
(70 - 130 psi)
through the cooler outlet hose to force any remaining A/T fluid
into the coffee filter.
9.
Remove the coffee filter from the end of the cooler inlet hose.
10. Perform
AT-18, "A/T FLUID COOLER INSPECTION PROCE-
.
SCIA3831E
SCIA3833E
SCIA3834E
AT-18
A/T FLUID
A/T FLUID COOLER INSPECTION PROCEDURE
1.
Inspect the coffee filter for debris.
a.
If small metal debris less than 1 mm (0.040 in) in size or metal
powder is found in the coffee filter, this is normal. If normal
debris is found, the A/T fluid cooler/radiator can be re-used and
the procedure is ended.
b.
If one or more pieces of debris are found that are over 1 mm
(0.040 in) in size and/or peeled clutch facing material is found in
the coffee filter, the fluid cooler is not serviceable. The A/T fluid
cooler/radiator must be replaced and the inspection procedure is
ended. Refer to
and
.
A/T FLUID COOLER FINAL INSPECTION
After performing all procedures, ensure that all remaining oil is cleaned from all components.
SCIA2967E
SCIA5257E
A/T CONTROL SYSTEM
AT-19
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A/T CONTROL SYSTEM
PFP:31036
Cross-Sectional View
ACS00198
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
18. Forward one-way clutch
19. Rear extension
20. Intermediate shaft
21. Output shaft
22. Companion flange
SCIA5504E
AT-20
A/T CONTROL SYSTEM
Shift Mechanism
ACS004PW
The automatic transmission uses compact triple planetary gear systems to improve power-transmission effi-
ciency, simplify construction 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. Intermediate shaft
22. Output shaft
23.
Parking gear
24. Parking pawl
SCIA3985J
Name of the Part
Abbreviation
Function
Front brake (1)
FR/B
Fastens the front sun gear (11).
Input clutch (2)
I/C
Connects 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)
F/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/OWC
Allows 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/OWC
Allows the mid sun gear (17) to turn freely in the forward direction but fastens it
for reverse rotation.
3rd one-way clutch (10)
3rd/OWC
Allows the front sun gear (11) to turn freely in the forward direction but fastens
it for reverse rotation.
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