Ford Ecosport: Automatic Transmission - 6-Speed Automatic Transmission – 6F35 / Diagnosis and Testing - Transmission Air Pressure Test
Transmission Air Pressure Test
Item
|
Description
|
1
|
Foward clutch
|
2
|
Direct clutch
|
3
|
Intermediate clutch
|
4
|
Low reverse clutch
|
5
|
Overdrive clutch
|
NOTE:
The center support contains an air bleed for the forward and
Low reverse clutch circuits. Some leakage during the air test can be
normal.
NOTE:
The Intermediate clutch pressure chamber contains an air
bleed for the Intermediate clutch circuit. Some leakage during the air
test can be normal.
A
hydraulic clutch concern can be located through a series of checks by
substituting air pressure for fluid pressure to determine the location
of the concern.
-
Install the forward clutch and low/reverse clutch main control-to-transmission case seals.
-
Using a rubber tipped blow gun, apply 40 PSI (276 kpa) to the suspect clutch port for 2-3 seconds.
-
A dull thud indicates the clutch piston applied.
-
A hissing noise may indicate a leak in the hydraulic
passages. Hydraulic circuits that use scarf cut seals and/or air bleeds
will have some normal leakage.
-
While holding the blow gun nozzle firmly against the port in the transmission case, release the trigger.
-
Wait 1-2 seconds.
-
A hissing noise may indicate a leak in the hydraulic
passages. Hydraulic circuits that use scarf cut seals and/or air bleeds
will have some normal leakage.
-
Remove the blow gun from the port.
-
A sudden release of air pressure indicates the hydraulic passages are capable of holding pressure.
-
No noise may indicate a leak in the hydraulic passages.
Hydraulic circuits that use scarf cut seals and/or air bleeds will have
some normal leakage.
Stall Speed Test
WARNING:
Block all wheels, set the parking brake and firmly apply the
service brake to reduce the risk of vehicle movement during this
procedure...
Symptom Chart
Forward Clutch
For forward (1,2,3,4) clutch operation, REFER to: Transmission
Description (307-01B Automatic Transmission - 6-Speed Automatic
Transmission – 6F35, Description and Operation)...
Other information:
Removal
NOTE:
Removal steps in this procedure may contain installation details.
NOTE:
LHD shown, RHD similar.
All vehicles
Detach the parking brake control boot and position the boot upward on the handle.
Remove and discard the lock nut...
Acceleration Control
The acceleration controls consist of the accelerator pedal and sensor assembly.
The throttle is controlled by an APP sensor on the accelerator pedal
assembly. The APP sensor sends a signal to the PCM in response to
throttle pedal movements initiated by the driver...