Toyota Automatic Transmission A340 Series. Repair Manual — part 20
AT5785
AT5776
AT5786
SST
AT8223
AT7893
(f)
Align the teeth of the second brake drum, flange,
discs and plates as shown in the figure.
(g)
Align the splines of the transmission case and the
assembled rear planetary gear, second brake
drum, first and reverse brake pack and output
shaft, indicated by A.
(h)
Hold the output shaft with wooden blocks or
equivalents.
(i)
Using SST, install the snap ring.
SST
09350−30020 (09350−07060)
5.
CHECK PACK CLEARANCE OF FIRST AND REVERSE
BRAKE
Using a feeler gauge, measure the clearance between
the plate and second brake drum as shown in the figure.
Clearance: 0.50 − 1.02 mm (0.0197 − 0.0402 in.)
If the values are nonstandard, select another flange.
−
AUTOMATIC TRANSMISSION (A340F)
Installation of Component Parts
AT−149
AT4469
AT5781
No.
Thickness
No.
Thickness
50
5.0 (0.197)
53
4.4 (0.173)
51
4.8 (0.189)
54
4.2 (0.165)
52
4.6 (0.181)
55
4.0 (0.157)
AT5788
AT5787
Flange Thickness
mm (in.)
HINT: There are six different thicknesses for the flange.
6.
INSTALL SECOND BRAKE PISTON SLEEVE
7.
INSTALL NEW BRAKE DRUM GASKET
8.
INSTALL NO. 1 ONE−WAY CLUTCH
9.
INSTALL FLANGE, PLATES AND DISCS OF SECOND
BRAKE
(a)
Install the plate with the rounded edge side of the
plate facing the discs.
Plate thickness: 2.5 mm (0.098 in.)
(b)
Install the plates and discs.
Install in order: P = Plate D = Disc
D−P−D−P−D−P−D
(c)
Install the flange with the rounded edge of the
flange facing the disc.
AT−150
−
AUTOMATIC TRANSMISSION (A340F)
Installation of Component Parts
AT5215
A73156
Front
AT5778
AT5790
Inside
Outside
Bearing
35.5 (1.398)
47.7 (1.878)
Race
33.7 (1.327)
47.6 (1.874)
AT5789
mm (in.)
(d)
Install the snap ring.
10. CHECK PACK CLEARANCE OF SECOND BRAKE
Using a feeler gauge, measure the clearance between
the snap ring and flange as shown in the figure.
Clearance: 0.50 − 1.76 mm (0.0197 − 0.0693 in.)
If the values are nonstandard, check for an improper
installation.
11. INSTALL PLANETARY SUN GEAR
While turning the planetary sun gear clockwise, install it
into No. 1 one−way clutch.
HINT: Confirm the thrust washer is installed correctly.
12. INSTALL FRONT PLANETARY GEAR
(a)
Coat the bearing and race with petroleum jelly and
install them onto the front planetary gear.
HINT: Bearing and race diameter
(b)
Install the front planetary gear to the sun gear.
−
AUTOMATIC TRANSMISSION (A340F)
Installation of Component Parts
AT−151
AT5775
AT5772
AT5791
Inside
Outside
Race
34.3 (1.350)
47.8 (1.882)
AT5245
AT5777
SST
(c)
Using SST, install the snap ring.
SST
09350−30020 (09350−07070)
(d)
Remove the wooden blocks or equivalents under
the output shaft.
(e)
Coat the bearing race with petroleum jelly and
install it onto the front planetary gear.
HINT: Race diameter
mm (in.)
13. INSTALL SECOND COAST BRAKE BAND
(a)
Install the second coast brake band to the case.
(b)
Install the pin through the brake band.
(c)
Install the E−ring to the pin.
AT−152
−
AUTOMATIC TRANSMISSION (A340F)
Installation of Component Parts
AT8401
AT8233
AT8306
Front
Inside
Outside
Bearing
26.0 (1.024)
46.7 (1.839)
Race
26.0 (1.024)
48.9 (1.925)
Inside
Outside
Race
26.8 (1.055)
47.0 (1.850)
AT8307
Front
Inside
Outside
Bearing
32.6 (1.283)
47.7 (1.878)
Race
30.6 (1.205)
53.6 (2.110)
AT8305
Front
mm (in.)
mm (in.)
mm (in.)
14. INSTALL FRONT PLANETARY RING GEAR TO FOR-
WARD AND DIRECT CLUTCH
(a)
Coat the bearing and race with petroleum jelly
and install them onto the forward clutch.
HINT: Bearing and race diameter
(b)
Coat the race with petroleum jelly and install it
onto the front planetary ring gear.
HINT: Race diameter
(c)
Align the flukes of the discs in the forward clutch.
(d)
Align the splines of the front planetary ring gear
with the flukes of the discs and install the front
planetary ring gear to the forward clutch.
15. INSTALL ASSEMBLED DIRECT CLUTCH, FORWARD
CLUTCH AND FRONT PLANETARY RING GEAR
INTO CASE
(a)
Coat the bearing and race with petroleum jelly
and install them onto the ring gear.
HINT: Bearing and race diameter
−
AUTOMATIC TRANSMISSION (A340F)
Installation of Component Parts
AT−153
AT5213
AT5793
AT5766
SST
AT5764
Mark
Piston Rod
Inside
Outside
Bearing and
race
33.7 (1.327)
47.6 (1.874)
AT5792
mm (in.)
(b)
Install the assembled direct clutch, forward clutch
and front planetary ring gear into the transmission
case.
(c)
Using vernier calipers, measure the distance be-
tween the sun gear input drum and direct clutch
drum as shown in the figure.
Height: 9.8 − 11.8 mm (0.386 − 0.465 in.)
If the values are nonstandard, check for an improper
installation.
(d)
Coat the assembled bearing and race with petro-
leum jelly and install it onto the forward clutch.
HINT: Assembled bearing and race diameter
16. INSTALL SECOND COAST BRAKE COVER, PISTON
ASSEMBLY AND SPRING
(a)
Coat two new O−rings with ATF and install them
to the cover.
(b)
Install the spring, piston assembly and cover to
the case.
(c)
Using SST, install the snap ring.
SST
09350−30020 (09350−07060)
17. CHECK PISTON ROD STROKE OF SECOND COAST
BRAKE
(a)
Place a mark on the second coast brake piston
rod as shown in the figure.
AT−154
−
AUTOMATIC TRANSMISSION (A340F)
Installation of Component Parts
AT5794
SST
AT8312
24 mm (0.94 in.)
SST
Front
AT5795
Inside
Outside
Race
36.8 (1.449)
50.9 (2.004)
AT8157
AT5765
SST
(b)
Using SST, measure the stroke applying the com-
pressed air (4 − 8 kg /cm
2
, 57 − 114 psi or 392 −
785 kPa) as shown in the figure.
SST
09240−00020
Piston rod stroke: 1.5 − 3.0 mm (0.059 − 0.118 in.)
If it is still more than standard value, replace the brake
band with a new one.
18. INSTALL OVERDRIVE SUPPORT ASSEMBLY
(a)
Coat the race with petroleum jelly and install it
onto the overdrive support assembly.
HINT: Race diameter
mm (in.)
(b)
Using two bolts of SST, aim the bolt and oil holes
of the overdrive support toward the valve body
side, and align them with the bolt holes of the
transmission case and insert.
SST
09350−30020 (09350−07020)
(c)
Using SST, install the snap ring as shown in the
figure.
SST
09350−30020 (09350−07060)
(d)
Install and torque the two bolts.
Torque: 260 kg−cm (19 ft−lb, 25 N−m)
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AUTOMATIC TRANSMISSION (A340F)
Installation of Component Parts
AT−155
AT5763
AT8427
AT8212
SST
O/D Brake Piston
AT5762
AT5796
19. CHECK OUTPUT SHAFT
(a)
Using a dial indicator, measure the end play of
the output shaft with hand.
End play: 0.27 − 0.86 mm (0.0106 − 0.0339 in.)
If the values are nonstandard, check for an improper
installation.
(b)
Check to see that output shaft rotates smoothly.
20. INSTALL FLANGES, PLATES AND DISCS OF OVER-
DRIVE BRAKE
(a)
Install the 4.0 mm (0.157 in.) thick flange (flat ring)
with the rounded edge side of the flange facing the
discs.
(b)
Install the plates and discs.
Install in order: P = Plate D = Disc
D−P−D−P−D
(c)
Install the flange (stepped ring) with the flat side of
the flange facing the disc.
(d)
Install the snap ring.
21. CHECK PISTON STROKE OF OVERDRIVE BRAKE
(a)
Place SST and a dial indicator onto the overdrive
brake piston as shown in the figure.
SST
09350−30020 (09350−06120)
(b)
Measure the stroke applying and releasing the com-
pressed air (4 − 8 kg/cm
2
, 57 − 114 psi or 392 − 785
kPa) as shown in the figure.
Piston stroke: 1.32 − 1.62 mm (0.0520 − 0.0638 in.)
If the piston stroke is less than the limit, parts may have
been assembled incorrectly, check and reassemble again.
If the piston stroke is nonstandard, select another flange.
AT−156
−
AUTOMATIC TRANSMISSION (A340F)
Installation of Component Parts
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