Mazda Automatic Transaxle JA5A-EL. Manual — part 5

K–1

K

K

MECHANISM AND OPERATION

AUTOMATIC TRANSAXLE. . . . . . . . . K-2

AUTOMATIC TRANSAXLE OUTLINE . . . . .K-2

AUTOMATIC TRANSAXLE SPECIFICATIONS...K-2

AUTOMATIC TRANSAXLE

CROSS-SECTIONAL VIEW. . . . . . . ..K-3

AUTOMATIC TRANSAXLE DESCRIPTION . . K-4

TORQUE CONVERTER DESCRIPTION. . . .K-5

POWERTRAIN DESCRIPTION . . . . . . ...K-6

PLANETARY GEAR SET DESCRIPTION . . .K-10

OIL PUMP DESCRIPTION . . . . . . . . K-21

CONTROL VALVE DESCRIPTION . . . . ...K-22

POWER TRANSMISSION/HYDRAULIC

MECHANISM DESCRIPTION. . . . . . .K-46

K–2

AUTOMATIC TRANSAXLE

AUTOMATIC TRANSAXLE OUTLINE

AME561401030A01

• Adopted new JA5A-EL automatic transaxle.

• Newly designed FF type five-speed automatic transaxle.

— Use of 3 sets of planetary gears, and wider gear ratio setting realizes improvements of acceleration-from-

standing-start performance, fuel economy, and quietness. Also, by placement of two sets of planetary

gears in parallel with one set, the automatic transaxle is more compact.

• Adopted 2-4 brake clutch.

— Adopted a wet-type, multi-plate 2-4 brake clutch instead of the 2-4 brake band used in the past, smoother

gear switching performance.

• Adopted centrifugal balance clutch

— The newly adopted centrifugal balance clutch pushes the clutch piston forcefully to low and high clutch by

centrifugal hydraulic pressure for smoother gear switching with better response.

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AUTOMATIC TRANSAXLE SPECIFICATIONS

AME561401030A02

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AUTOMATIC TRANSAXLE

Item

MPV

For General (R.H.D.)

specs.

Except for General

(R.H.D.) specs.

Transaxle type

JA5A-EL

Engine type

AJ

Gear ratio

1GR

3.801

2GR

2.131

3GR

1.364

4GR

0.935

5GR (O/D)

0.685

Reverse

2.970

Final gear ratio

3.290

3.491

ATF

Type

ATF M-III or equivalent (e.g. Dexron III)

Capacity (Approximate quantity)

(L {US qt, Imp qt})

9.7 {10.3, 8.5}

Torque converter stall torque ratio

1.86:1

Hydraulic system (Number of

drive/driven plates)

Low clutch

7/7

2-4 brake

3/4

High clutch

5/5

Direct clutch

4/4

Reverse clutch

2/2

Low and reverse brake

6/5

Band servo (mm {in})

Reduction accumulator piston outer

dia./reduction band servo piston outer

dia.

49.66/57.64

{1.955/2.269}

Number of front planetary gear

teeth

Ring gear

74

Sun gear

34

Pinion gear

20

Number of rear planetary gear

teeth

Ring gear

75

Sun gear

42

Pinion gear

17

Number of reduction planetary

gear teeth

Ring gear

85

Sun gear

31

Pinion gear

27

Number of output gear teeth

41

Number of idler gear teeth

47

AUTOMATIC TRANSAXLE

K–3

K

AUTOMATIC TRANSAXLE CROSS-SECTIONAL VIEW

AME561401030A03

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AMU0517A501

K–4

AUTOMATIC TRANSAXLE

AUTOMATIC TRANSAXLE DESCRIPTION

AME561401030A04

Gear Position and Operation of Featured Parts

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AME5714W019