Mazda Transaxle FN4A-EL. Manual — part 15

K1–52

AUTOMATIC TRANSAXLE

3-4 clutch clearance

1. Measure the 3-4 clutch clearance.

(1) Install the 3-4 clutch in the end cover and set the dial gauge.
(2) Secure the 3-4 clutch by lightly pressing down

with a press, etc.

(3) Apply compressed air to the part indicated in

the figure and let the 3-4 clutch piston stroke
three times.

Air pressure

392—441 kPa {4.0—4.5 kgf/cm

2

, 57—63 psi}

(4) Apply compressed air and operate the 3-4

clutch piston. Read the value when the
indicator of the dial gauge stops.

(5) Release the compressed air and read the dial

gauge when the 3-4 clutch piston is not
operating.

(6) Calculate the 3-4 clutch clearance according

to the following formula:
Step (4) value – Step (5) value = 3-4 clutch clearance.

(7) Measure the clearances at four locations (90

°

apart) by following the steps from (3) to (6).
Verify that the average value is within the
specification below.

3-4 clutch clearance

Drive plate part number:FN11 19 370

1.00—1.30 mm {0.039—0.051 in}

Drive plate part number:FNE1 19 370

1.10—1.40 mm {0.043—0.055 in}

2. If not as specified, replace parts as

necessary.(See

K1–18 CLUTCH COMPONENT

DISASSEMBLY/ASSEMBLY

.)

Bushing inner diameter inspection

1. Measure the bushing of the 3-4 clutch hub.

Bushing inner diameter

Standard: 18.000—18.018 mm

{0.70866—0.70936 in}

Maximum: 18.038 mm{0.71016 in}

2. If not as specified, replace the 3-4 clutch

hub.(See

K1–18 CLUTCH COMPONENT

DISASSEMBLY/ASSEMBLY

.)

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AUTOMATIC TRANSAXLE

K1–53

K1

3. Measure the bushing of the 2-4 brake drum.

Bushing inner diameter

Standard: 55.000—55.030 mm

{2.16535—2.16653 in}

Maximum: 55.050 mm {2.16732 in}

4. If not as specified, replace the 2-4 brake

drum.(See

K1–18 CLUTCH COMPONENT

DISASSEMBLY/ASSEMBLY

.)

Front Internal Gear and One-Way Clutch Component
Preinspection

1. Set the front internal gear and one-way clutch

component to the one-way clutch inner race.
Verify that the one-way clutch rotates smoothly
when turned counterclockwise and locks when
turned clockwise.

2. If not as specified, replace parts as necessary.

(See Section K.)

Low and Reverse Brake Preinspection
Clutch operation

Caution

••••

Applying compressed air to the assembled clutch pack for longer than 3 seconds at a time will
damage the seal.
Do not apply compressed air for more that the aforementioned time when testing the system.

1. Inspect the clutch operation by applying

compressed air as shown.

Air pressure

392 kPa {4.0 kgf/cm

2

, 57 psi} max.

2. If not as specified, replace parts as necessary.

(See Section K.)

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K1–54

AUTOMATIC TRANSAXLE

Clutch clearance

1. Measure the low and reverse brake clearance.

(1) Set the dial gauge to the low and reverse brake.
(2) Set the measuring point of the dial gauge to

the low and reverse brake piston.

(3) Apply compressed air to the part indicated in

the figure and let the low and reverse brake
piston stroke three times.

Air pressure

98.1 kPa {1.0 kgf/cm

2

, 14 psi}

(4) Apply compressed air and operate the low

and reverse brake piston. Read the value
when the indicator of the dial gauge stops.

(5) Release the compressed air and read the dial

gauge when the low and reverse brake piston
is not operating.

(6) Calculate the low and reverse brake

clearance according to the following formula:
Step (4) value – Step (5) value = low and reverse brake clearance.

(7) Measure the clearances at four locations (90

°

apart) by following the steps from (3) to (6).
Verify that the average value is within the
specification below:

Low and reverse brake clearance

2.20—2.50 mm {0.087—0.098 in}

2. If not as specified, replace parts as necessary.

(See Section K.)

Differential Preinspection
Backlash

1. Measure the backlash of the side gear.

Backlash

Standard: 0.05—0.15 mm {0.002—0.005 in}
Maximum: 0.5 mm {0.020 in}

2. If not specified, replace the differential. (See

K1–

26 DIFFERENTIAL DISASSEMBLY/
ASSEMBLY

.)

End Of Sie

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TD–1

TD

TD

TECHNICAL DATA

TECHNICAL DATA . . . . . . . . . . . . TD-2

AUTOMATIC TRANSAXLE

TECHNICAL DATA . . . . . . . . . . TD-2