Toyota 4-Runner 1985 Repair Manual page 444

AT -42 AUTOMATIC TRANSMISSION - Component Groups (Overdrive Input Shaft and Clutch)
5. INSTALL CLUTCH PISTON IN OVERDRIVE CLUTCH DRUM
(a) Install a new O-ring on the piston. Coat the O-ring wi""
ATF.
(b) Press piston into the drum with the side up, being
careful not to damage the O-ring.
6. INSTALL EIGHTEEN PISTON RETURN SPRINGS AND SET
RETAINER AND SNAP RING IN PLACE
7. COMPRESS RETURN SPRINGS AND INSTALL SNAP RING
IN GROOVE
(a) Place SST on the spring retainer, and compress the
springs on shop press.
SST
09350-20013
(b) Install the snap ring with a screwdriver.
Be sure the end gap of the snap ring is not aligned
with the spring retainer claw.
8.
INSTALL PLATE, DISC AND FLANGE
(a) Using low-pressure compressed air, blow all excess
A TF from the disc.
CAUTION: High-pressure air will damage the disc.
(b) Install in order: Plate-disc-flange (flat end down)
9. INSTALL THINNER SNAP RING IN OVERDRIVE CLUTCH
DRUM
Compress and lower the snap ring into the groove by hand.
Check that the ends of the snap ring are not aligned with
one of the cutouts.
10.
CHECK PISTON STROKE OF OVERDRIVE CLUTCH
(a) Install the overdrive clutch hub and outer snap ring.
(b) Install the front clutch drum onto the oil pump body.
Using a dial indicator, measure the stroke applying and
releasing the compressed air (4-8 kg/cm2,
57-114
psi or 392 - 785 kPa) as shown.
Standard piston stroke:
1.47 -2.28
mm
(0.0579-0.0898
in.)
If stroke exceeds the limit, the clutch pack is probably worn.
If the stroke is less than the limit, parts may be misassem-
bled or there may be excess ATF on the discs.