Lexus RX300 (MCU15). Service manual - part 573

D03919

D03599

D03618

A

D03815

–

AUTOMATIC TRANSAXLE

COMPONENT PARTS

AX–35

U140F AX   (RM848E)

10.

INSPECT DISC AND FLANGE OF 1ST & REVERSE
BRAKE

Check to see if the sliding surface of the disc, plate and flange
are worn or burnt. If necessary, replace them.
HINT:

S

If the lining of the disc is peeling off or discolored, or even
if a part of the printed mark is defaced, replace all discs.

S

Before assembling new discs, soak them in ATF for at
least 15 minutes.

11.

INSTALL 1ST & REVERSE BRAKE

(a)

Install the 7 plates and 7 discs.

(b)

Using vernier calipers, measure the distance between the
disc surface and the contact surface of the 2nd brake cyl-
inder and transaxle case.(Dimension A)

(c)

Select an appropriate flange so that the piston stroke will
meet the specified value.
Piston stroke: 1.10 – 1.24 mm (0.0433 – 0.0488 in.)

HINT:
Piston stroke = Dimension A – Flange thickness
Flange thickness: mm (in.)

Mark

Thickness

Mark

Thickness

1

1.8 (0.071)

5

2.2 (0.087)

2

1.9 (0.075)

6

2.3 (0.091)

3

2.0 (0.079)

7

2.4 (0.094)

4

2.1 (0.083)

8

2.5 (0.098)

(d)

Install the flange.

D03619

D03589

D03909

D03920

AX–36

–

AUTOMATIC TRANSAXLE

COMPONENT PARTS

U140F AX   (RM848E)

12.

INSTALL 2ND BRAKE CYLINDER ASSEMBLY, ONE–
WAY CLUTCH NO.1 AND REAR PLANETARY SUN
GEAR ASSEMBLY

(a)

Install the 2nd brake cylinder assembly to the transaxle
case.

(b)

Install the snap ring and measure the inside diameter.
Inside diameter: More than 167 mm (6.57 in.)

NOTICE:

S

Because the taper snap ring has the positioning
direction, check it when installing.

S

When the diameter does not satisfy the specified val-
ue, replace the snap ring with new one.

(c)

Install the one–way clutch outer race sleeve to the 2nd
brake cylinder assembly.

NOTICE:
Check the positioning direction of the outer sleeve.

(d)

Install the inner race to the one–way clutch.

NOTICE:
Check the direction of the inner race.

(e)

Check the rotating direction of one–way clutch for the lock
or free operation, as shown in illustration.

D03588

D03908

D03791

D03587

D04083

–

AUTOMATIC TRANSAXLE

COMPONENT PARTS

AX–37

U140F AX   (RM848E)

(f)

Install the one–way clutch No.1 and bearing to the one–
way clutch outer race sleeve.

Bearing diameter: mm (in.)

Inside

Outside

Bearing

53.6 (2.110)

69.6 (2.740)

NOTICE:
Install the thrust bearing properly so that the black race will
be risible.

(g)

Coat the thrust washer No.1 with petroleum jelly install it
onto the rear planetary sun gear.

(h)

Coat the bearing with petroleum jelly and install it onto the
rear planetary sun gear.

Bearing diameter: mm (in.)

Inside

Outside

Bearing

33.7 (1.327)

48.2 (1.898)

(i)

Install the rear planetary sun gear assembly to the rear
planetary gear.

13.

INSPECT DISC AND FLANGE OF 2ND BRAKE

Check to see if the sliding surface of the disc, plate and flange
are worn or burnt. If necessary, replace them.
HINT:

S

If the lining of the disc is peeling off or discolored, or even
if a part of the printed mark is defaced, replace all discs.

S

Before assembling new discs, soak them in ATF for at
least 15 minutes.

D03621

D03622

D03623

D03802

AX–38

–

AUTOMATIC TRANSAXLE

COMPONENT PARTS

U140F AX   (RM848E)

14.

INSTALL 2ND BRAKE

(a)

Install the 4 discs and 4 plates to the transaxle case.

(b)

Temporarily install the snap ring.

(c)

Using vernier calipers, measure the distance between the
disk surface and snap ring surface.

(d)

Select an appropriate flange so that the piston stroke will
meet the specified value.
Piston stroke: 0.65 – 0.75 mm (0.0256 – 0.0295 in.)

HINT:
Piston stroke = Clearance – Flange thickness – Snap ring thick-
ness 1.6 mm (0.063 in.).
Flange thickness: mm (in.)

Mark

Thickness

Mark

Thickness

1

3.0 (0.118)

5

3.4 (0.134)

2

3.1 (0.122)

6

3.5 (0.138)

3

3.2 (0.126)

7

3.6 (0.142)

4

3.3 (0.130)

–

–

(e)

Temporarily remove the snap ring, attach the selected
flange and restore the snap ring.

NOTICE:
Secure the snap ring so that its end gap is visible through
the groove of the transaxle case.

15.

INSTALL DIRECT CLUTCH ASSEMBLY

(a)

Install the bearing race to the direct clutch.

Bearing race diameter: mm (in.)

Inside

Outside

Bearing race

30.3 (1.193)

46.0 (1.811)