Toyota 4-Runner 1985 Repair Manual page 468

AT-66 AUTOMATIC TRANSMISSION - Component Groups (Transmission Case and Rear Brake Pistons)
2. REMOVE SPRING RETAINER AND SIXTEEN SPRINGS
3. REMOVE OUTER PISTON AND REACTION SLEEVE
WITH COMPRESSED AIR
(a) Turn the case over face down on a workbench.
Place several clean shop rags under the case to catch the
piston and sleeve. To pop them out, apply compressed air
to the outer and inner piston oil holes.
~
" If the piston and sleeve do not pop out with the compressed
air.
(b) Using needle-nose pliers, lift the outer piston from the
case.
(c) Insert two long hooks behind the reaction sleeve and
gradually
lift
it out of the case.
(d) Using hooks, lift the inner piston out of case in the
same manner.
4. REMOVE O-RINGS FROM OUTER AND INNER PISTONS
AND REACTION SLEEVE
INSPECTION OF CASE COMPONENT GROUP
REPLACEMENT OF MANUAL SHAFT OIL SEALS
(a) Remove the manual shaft oil seals with a screwdriver.
(b) Drive in new left and right oil seals with SST.
SST 09350-20013