Ford Festiva. Manual — part 104

Differential Noise

ATF contaminated or level incorrect. Bearings worn or has excessive preload. Teeth on gears worn or damaged or has excessive backlash.

TESTING

PARK/NEUTRAL SWITCH TEST

1. Ensure engine starts in "P" or "N". Ensure back-up lights glow when ignition is on and selector lever in "R". If park/neutral switch is not

operating properly, disconnect connector at transaxle and check continuity between terminals. See

Fig. 4

. If continuity is not as

indicated, replace park/neutral switch.

Fig. 4: Testing Park/Neutral Switch

Courtesy of FORD MOTOR CO.

KICKDOWN (DOWNSHIFT) SOLENOID TEST

1. Check Fuse

Ensure ignition is off. Inspect condition of 15 amp METER fuse located in interior fuse junction panel. If fuse is okay, go to step 4). If
fuse is blown, go to next step.

2. Check System

Ensure ignition is off. Replace 15 amp fuse. Turn ignition on. If fuse blows, go to next step. If fuse is okay, go to step 4).

3. Check For Short To Ground

Turn ignition off. Remove 15 amp METER fuse. Disconnect kickdown switch harness connector. Check continuity between
Black/Yellow wire terminal of interior fuse holder and ground. If continuity exists, inspect and repair short circuit as needed. If
continuity does not exist, replace 15 amp fuse. Go to next step.

4. Check Power Supply To Kickdown Switch

Ensure ignition is off. Disconnect kickdown switch harness connector. Turn ignition on. Measure voltage between Black/Yellow wire
terminal of kickdown switch harness connector and ground. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less,

inspect and repair circuit between switch harness connector and fuse panel.

5. Check Kickdown Switch

Turn ignition off. Check continuity between kickdown switch terminals. Continuity should only exist with accelerator fully depressed. If
switch is functioning correctly, go to next step. Replace switch if it failed testing. Road test vehicle to verify repair.

6. Check Circuit Between Kickdown Switch & Kickdown Solenoid

Ensure ignition is off. Disconnect kickdown switch harness connector. Disconnect kickdown solenoid harness connector. Check
continuity of White/Black wire between switch harness connector and solenoid harness connector. If continuity does not exist, inspect
and repair open circuit as needed. If continuity exists, check continuity between White/Black wire terminal at solenoid harness
connector and ground. If continuity exists, inspect and repair short circuit as needed. If continuity does not exist, replace kickdown
solenoid.

VACUUM THROTTLE VALVE DIAPHRAGM (MODULATOR) TEST

1. Check System Integrity

Inspect all vacuum hoses and connections for leaks or damage. Disconnect vacuum hose at diaphragm connection and inspect for
leaking ATF. Repair as needed. Go to next step.

2. Check Vacuum At Modulator

Ensure ignition is off. Disconnect vacuum hose at modulator valve and connect vacuum gauge to hose. Start and run engine at idle.
Vacuum should be 15-22 In. Hg. If vacuum is not within specification, inspect and repair vacuum hose. If vacuum is within specification,
go to next step.

3. Check Modulator Valve Function

Turn ignition off. Remove modulator valve from transaxle. Connect hand-held vacuum pump to valve. Apply 16-20 In. Hg of vacuum.
Ensure vacuum is held by valve. Release vacuum and verify that valve moves freely. If valve is functioning correctly, go to next step.
Replace valve if it fails testing.

4. Check Vacuum Diaphragm Rod

With modulator removed, measure depth of vacuum throttle valve (dimension "N"). See

Fig. 5

. Measure length of throttle control valve

rod. Ensure correct length rod is installed. Refer to the

THROTTLE VALVE ROD DIMENSION CHART

. If correct rod is installed

in transaxle, inspect operation of vacuum throttle valve in valve body. Install correct rod length as needed.

THROTTLE VALVE ROD DIMENSION CHART

Fig. 5: Measuring Vacuum Throttle Valve Depth

Courtesy of FORD MOTOR CO.

STALL TEST

Testing Precautions

When testing, DO NOT hold throttle open longer than five (5) seconds. Shift to "N" and allow engine to idle for at least two (2) minutes
between tests to cool transaxle. If engine speed exceeds specification, release accelerator immediately as clutch or band slippage is indicated.

"N" Dimension: In. (mm)

Rod Length: In. (mm)

1.0 (25.4)

1.16 (29.5)

1.0-1.02 (25.4-25.9)

1.18 (30.0)

1.02-1.04 (25.9-26.4)

1.20 (30.5)

1.04-1.06 (25.9-26.4)

1.22 (31.0)

1.06-1.08 (26.9-27.4)

1.24 (31.5)

See

STALL SPEED SPECIFICATIONS

.

Testing Procedures

1. With engine at normal operating temperature, tachometer installed and parking and service brakes applied, perform transaxle stall test in

"D", "2", "1" and "R" ranges at full throttle and note maximum RPM obtained. Correct stall speed should occur at specified RPM. See
the

STALL SPEED SPECIFICATIONS

.

STALL SPEED SPECIFICATIONS

2. If stall speed is too high in all shift ranges, the following components may be faulty:



Worn Oil Pump.



Oil leakage from oil pump, valve body or transaxle case.



Sticking pressure regulator valve.

3. If stall speed is too high in "D", "2" and "1", the following component may be faulty:



Slipping rear clutch.

4. If stall speed is too high in "D", the following component may be faulty:



Slipping one-way clutch.

5. If stall speed is too high in "2", the following components may be faulty:



Slipping intermediate band.

6. If stall speed is too high in "R", the following components may be faulty:



Slipping Low/Reverse Clutch.



Slipping Front Clutch.

7. If stall speed is too low in all shift ranges, the following components may be faulty:



Slipping torque converter one-way clutch.

ROAD TEST

1. Before road test, ensure that fluid level, fluid condition and control linkage adjustments are okay. During test, transaxle should upshift

or downshift at about same speed as specified. See appropriate

SHIFT SPEED SPECIFICATIONS

.

2. All shifts may vary slightly due to production tolerances or tire size. The quality of the shifts are more important. All shifts should be

smooth, responsive and with no slippage or engine flare. Slippage or engine flare in any gear usually indicates clutch or band problems.

3. The slipping clutch or band in a particular gear can usually be identified by noting transaxle operation in other selector positions and

comparing internal units which are applied in these positions. See

CLUTCH & BAND APPLICATION

.

SHIFT SPEED SPECIFICATIONS

VEHICLE SHIFT SPEED SPECIFICATIONS (ASPIRE & FESTIVA)

VEHICLE SHIFT SPEED SPECIFICATIONS (TRACER)

Application

Engine RPM

Aspire

2300-2500

Festiva & Tracer

2300-2500

Operating Condition

(1)

Shift Speed MPH (km/h)

Half Throttle (50%)

1-2

9-17 (15-28)

2-3

16-34 (26-55)

Full Throttle (WOT)

(2)

1-2

28-33 (44-53)

2-3

55-63 (88-101)

3-2

53-48 (86-78)

2-1

24-22 (39-35)

Coasting (2-1)

9-6 (14-9)

(1)

Transmission is in "D" range.

(2)

To determine deceleration shift speeds, release throttle once transaxle has shifted into 3rd gear. Manually downshift shift lever
into next lower gear and record speed at which downshift occurs. Continue downshifting and recording vehicle speed until
transaxle has downshifted into low gear.

Operating Condition

(1)

Shift Speed MPH

Half Throttle (50%)

1-2 - Carbureted

10-19

1-2 - EFI

12-21

2-3 - Carbureted

17-37

2-3 - EFI

37-48

Full Throttle (WOT)

1-2

30-36

2-3

60-68

3-2

53-58

2-1

24-26

Fully Closed Throttle

From "D" Range (3-1)

6-9

CLUTCH & BAND APPLICATION

CLUTCH & BAND APPLICATION CHART

HYDRAULIC PRESSURE TESTS

LINE PRESSURE TEST

1. Attach oil pressure gauge at line pressure checking port. See

Fig. 6

. Attach tachometer to engine. Position gauge so it can be seen from

driver's seat.

2. With engine at normal operating temperature, transaxle fluid level correct and transaxle in "D", check line pressure at idle and at stall

speed. Repeat test in "2", "1", and "R", allowing sufficient time for engine and transaxle to cool between tests. Record results. See

LINE

PRESSURE TEST SPECIFICATIONS

.

3. If Line Pressure Is Low In "D", "2", "1" & "R", check for worn oil pump, oil leaking from oil pump, control valve body or transaxle case

and sticking pressure regulator valve.

4. If Line Pressure Is Low In "D" & "2", check for oil leakage from hydraulic circuit of rear clutch or governor.
5. If Line Pressure Is Low In "R", check for oil leakage from hydraulic circuit of low-reverse brake.
6. If Line Pressure Is High At Idle, check for vacuum tube broken or disconnected or faulty vacuum modulator.

Fig. 6: Identifying Hydraulic Pressure Test Ports

Courtesy of FORD MOTOR CO.

From "1" (Low) Range (2-1)

22-26

(1)

Transmission is in "D" range.

Selector Lever Position

Elements In Use

"P" (Park)

Low-Reverse Brake

"R" (Reverse)

Front Clutch & Low-Reverse

Brake

"D" (Drive)

First Gear

Rear Clutch & One-Way

Clutch

Second Gear

Rear Clutch & Brake Band

Third Gear

Front Clutch & Rear Clutch

"2" (Intermediate)

First Gear

Rear Clutch & One-Way

Clutch

Second Gear

Rear Clutch & Brake Band

"1" (Low) First Gear

Rear Clutch & Low-Reverse

Brake

"N" (Neutral)

All Clutches & Bands Released

or Ineffective

NOTE:

DO NOT hold throttle open longer than 5 seconds. Shift to "N" and allow engine to idle for at least 2
minutes between tests to cool transaxle. If engine speed exceeds specification, release accelerator
immediately as clutch or band slippage is indicated.