Toyota 4-Runner 1985 Repair Manual page 488

AT-86 AUTOMATIC TRANSMISSON - Component Groups (Valve Body)
8. INSERT 2-3 SHIFT VALVE
(a) Insert the 2-3 shitf valve with the smaller end first, a"'~
then insert the plug.
(b) Compress the plug and install the intermediate shift
valve retainer in the valve body.
9. INSERT SPRING AND INTERMEDIATE SHIFT VALVE
INTO BORE
Insert the valve with the round end up.
10. INSERT PLUG AND RETAINER
11. INSTALL CHECK BALLS AS SHOWN
Install the steel ball in the position shown in the figure.
The three rubber balls are identical and may be installed
in any other position.