Ford Falcon. Manual — part 235
307-01-43 Automatic
Transmission 307-01-43
DIAGNOSIS AND TESTING (Continued)
Connector Circuit Reference
Automatic Transmission Connector Switch
Pin
Condition
Measurable Value
Min
Max
B34 VPWR
A
Voltage to GND B1
10V
14V
B46 VPWR
A
Voltage to GND B1
10V
14V
A43 LUS
B
Resistance to GND B1
23 Ohm
45 Ohm
A2 PCS
B
Resistance to pin B46 VPWR
23 Ohm
45 Ohm
B41 PRNDL
A
Voltage to pin A32, M1*
0.90V
1.10 V
B41 PRNDL
A
Voltage to pin A32, M2*
1.40V
1.60V
B41 PRNDL
A
Voltage to pin A32, M3*
1.90V
2.10V
B41 PRNDL
A
Voltage to pin A32, D
2.40V
2.60V
B41 PRNDL
A
Voltage to pin A32, N
2.90V
3.10V
B41 PRNDL
A
Voltage to pin A32, R
3.40V
3.60V
B41 PRNDL
A
Voltage to pin A32, P
3.9V
4.10V
B41 PRNDL
B
Resistance to pin A32, M1*
1.0 kOhm
1.4 kOhm
B41 PRNDL
B
Resistance to pin A32, M2*
1.8 kOhm
2.2 kOhm
B41 PRNDL
B
Resistance to pin A32, M3*
3.0 kOhm
3.4 kOhm
B41 PRNDL
B
Resistance to pin A32, D
4.5 kOhm
4.9 kOhm
B41 PRNDL
B
Resistance to pin A32, N
6.8 kOhm
7.2 kOhm
B41 PRNDL
B
Resistance to pin A32, R
10.6 kOhm
11.2 kOhm
B41 PRNDL
B
Resistance to pin A32, P
18.6 kOhm
19.0 kOhm
A17 MSC1
B
Resistance to pin B46 VPWR
23.0 Ohm
45.0 Ohm
A39 VPS
B
Resistance to pin B46 VPWR
3.1 Ohm
5.0 Ohm
A37 TFT
A
Voltage to pin A32 SGRTN
0.25V
4.8V
A37 TFT
B
Resistance to pin A32 SGRTN
57.0 Ohm
15.5 kOhm
A32 SIGRTN
C
Resistance to GND B
1 0.0V
1.0V
A19 GSS1
B
Resistance to pin B46 VPWR
23.0 Ohm
45 Ohm
A20 GSS2
B
Resistance to pin B46 VPWR
23.0 Ohm
45 Ohm
A18 MCS2
B
Resistance to pin B46 VPWR
23.0 Ohm
45 Ohm
B43 TRSA_2
A
Voltage to pin B33, D
3.94V
B43 TRSA_2
A
Voltage to pin B33, S
2.88V
B43 TRSA_2
A
Voltage to pin B33, UP
1.83V
B43 TRSA_2
A
Voltage to pin B33, DOWN
0.83V
G73082 en
307-01-44 Automatic
Transmission 307-01-44
DIAGNOSIS AND TESTING (Continued)
*Reading only applicable to column shift.
Conditions
A
PCM connected to vehicle wiring harness.
Ignition turned on.
Measurement at pin of vehicle wiring
harness.
B
PCM disconnected from vehicle wiring
harness.
Measurement at pin of vehicle wiring
harness.
C
PCM disconnected from vehicle wiring
harness.
Measurement at pin of PCM.
G73082 en
307-01-45 Automatic
Transmission 307-01-45
GENERAL PROCEDURES
9. If leakage is found at the manual lever shaft,
Hydraulic System
replace seals that are leaking.
Preliminary inspection
10. Check the front and rear servo covers.
When diagnosing transmission problems, first refer to 11. Fluid leakage from the converter housing may be
the diagnosis guide for detailed information of the
caused by engine oil leaking past the rear main
items that could be causing the problem. The
bearing or from oil gallery plugs. Be sure to
following preliminary checks should be made in the
determine the exact cause of the leak.
order listed.
Converter Area Leakage
1. Check the fluid level. Check the fluid for a burnt
clutch plate odour.
2. Check the manual linkage adjustment.
3. Check engine idle speed.
4. Check electrical connections.
5. Check that the transmission is not in failure mode.
6. Check front and rear band adjustment.
Fluid Level
A fluid level that is too high will cause the fluid to
become aerated. Aerated fluid will cause low line
pressure, and the aerated fluid may be forced out the
vent. Low fluid level can effect the operation of the
transmission and may indicate fluid leaks that could
cause transmission damage.
Fluid leakage checks
1. Check the speedometer transducer installation at
the transmission (if fitted).
2. Leakage at the oil pan seal often can be stopped
by tightening the attaching bolts to the proper
torque.
3. If necessary, replace the seal.
4. Check the fluid plug. If the plug O-ring seal is
leaking, replace the seal.
5. The transmission fluid is water cooled; check the
fluid lines and fittings between the transmission
and the cooler in the radiator tank for looseness,
wear, or damage.
Fluid Leakage Converter Area
If leakage cannot be stopped by tightening a
fitting, replace the defective parts.
In diagnosing and correcting fluid leaks in the front
pump and converter area, use the following
6. Check the engine coolant in the radiator. If
procedures to facilitate locating the exact cause of the
transmission fluid is present in the coolant, the
leakage. Leakage at the front of the transmission, as
cooler in the radiator tank is probably leaking.
evidenced by fluid around the converter housing, may
7. The cooler can be further checked for leaks by
have several sources. By careful observation, it is
disconnecting the lines at the cooler fittings and
possible, in many instances, to pinpoint the source of
applying 500 kPa maximum air pressure to the
the leak before removing the transmission from the
fittings. The radiator cap must be removed when
vehicle. The paths which the fluid takes to reach the
making this check to relieve the pressure on the
bottom of the converter housing are as shown.
exterior side of the cooler.
1. Fluid leaking from the front pump seal lip will tend
If the cooler is leaking and will not hold this
to move along the drive hub and onto the back of
pressure the radiator must be replaced. The
the impeller housing. In the case of a total seal
cooler cannot be replaced separately.
failure, fluid leakage past the lip of the seal will be
8. Leakage in the extension housing area may be
deposited on the inside of the converter housing
caused by a worn extension housing bush, seal,
only, near the outside diameter of the housing.
drive shaft yoke, the housing to case gasket or
the speedo transducer (if fitted).
G73085 en
307-01-46 Automatic
Transmission 307-01-46
GENERAL PROCEDURES (Continued)
2. Fluid leakage from the outside diameter of the
front of the flywheel, back of the block (in as far
seal and front pump body will follow the same
as possible), and inside the converter housing.
path as leaks from the front pump seal or may run
Run the engine until fluid leakage is evident and
down the face of the front pump.
the probable source of leakage can be
determined.
3. Fluid that leaks by front pump to case bolts will be
deposited on the inside of the converter housing
Gear shift Cable check
only. Fluid will not be deposited on the back of the
converter.
Correct cable adjustment is necessary to position the
manual valve for proper fluid pressure direction to the
4. Leakage by the front pump to case and O-ring
different transmission components. Improper
seal may cause fluid to be deposited on the inside
adjustment may cause subsequent transmission
lower part of the converter housing. Engine oil
failure. Refer to Gear Shift Cable Adjustment for
leaks are sometimes improperly diagnosed as
detailed adjustment procedures.
front pump seal leaks. The following areas of
possible leakage should also be checked to
Initial Engagement check
determine if engine oil leakage is causing the
problem:
Initial engagement checks are made to determine if
initial band and clutch engagements are smooth. Run
Leakage at the rocker arm cover may allow oil
the engine until its normal operating temperature is
to flow over the converter housing or seep
reached. With the engine at kerb idle speed, shift the
down between the converter housing and
selector lever from N to D and R. Observe the initial
cylinder block causing oil to be present in or
band and clutch engagements. Band and clutch
at the bottom of the converter housing.
engagements should be smooth in all positions.
Oil gallery plug leaks will allow oil to flow
Rough initial engagements are caused by high engine
down the rear face of the block to the bottom
idle speed or high line pressures.
of the converter housing.
Leakage from the crank shaft seal will work
Transmission operation checks - Test
back to the flywheel, and then into the
preparation
converter housing.
When testing the transmission, the transmission and
Fluid leakage from other areas, forward of the
engine must be at normal operating temperature.
transmission could cause fluid to be present around
the converter housing due to blow-back or road draft.
1. Check the transmission fluid level.
The following procedure should be used to determine 2. Check the gear shift cable adjustment.
the cause of leakage before any repairs are made:
3. Attach a tachometer to the engine.
5. Remove the transmission plug and note the
4. Firmly apply the parking brake and start the
colour of the fluid. Original factory fill fluid is dyed
engine.
red to aid in determining if leakage is from the
engine or transmission. Since road draft may
Stall test, Engine speed
cause leaking rocker cover oil to be present on
Ensure that the park and service brakes are firmly
the transmission, this leakage, if present, should
applied during these tests and the A/C is off. The stall
be eliminated before performing work on the
test is made in D and R at full throttle, speeds should
transmission.
agree with the specifications shown in the Converter
6. Remove the converter lower housing cover. Clean
Stall Speed table. While making this test, do not hold
off any fluid from the top and bottom of the
the throttle open for more than five seconds at a time.
converter housing, front of the transmission case,
Then move the selector lever to Neutral and run
and rear face of the engine and engine oil pan.
engine at 1000 rpm for about 15 seconds to cool the
Clean the converter area by washing with suitable
converter before making the next test. If the engine
non-flammable solvent, and blow dry with
speed recorded by the tachometer exceeds the
compressed air.
maximum limits specified in the Converter Stall Speed
7. Wash out the converter housing and the front of
table, release the accelerator immediately because
the flywheel. Blow all washed areas dry with
clutch or band slippage is indicated.
compressed air.
Type
Stall Speed
8. Start and run the engine until the transmission
6 Cyl
2000-2200 rpm
reaches its normal operating temperature.
Observe the back of the block and top of the
8 Cyl
2000-2400 rpm
converter housing for evidence of fluid leakage.
Stall speed too high
Raise the car on a hoist and run the engine at fast
idle, then at engine idle, occasionally shifting to
A higher stall speed than that specified indicates that
the drive and reverse ranges to increase
the converter is not receiving its required fluid supply
pressures within the transmission. Observe the
or that slip is occurring. Excessive engine speed in ‘D’
G73085 en
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