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