AT-78 AUTOMATIC TRANSMISSION — Component Groups (Planetary Gear Output Shaft) 5. INSTALL THREE OIL SEAL RINGS ON OUTPUT SHAFT Spread the rings apart and slide them into the groove. Hook both ends by hand. 6. INSTALL THRUST BEARING AND RACE ON OUTPUT SHAFT Hold the cup of the race toward the bearing. 7. USE EXTENSION HOUSING AS ASSEMBLY STAND 8. INSTALL INTERMEDIATE SHAFT ASSEMBLY IN OUTPUT SHAFT 9. INSTALL REAR PLANETARY CARRIER IN OUTPUT SHAFT Slide the carrier into place, and make sure that the lugs interlock. 10. SET IN PLACE FRONT PLANETARY RING GEAR Slide the snap ring downward, and align the lugs with the notches. Align the ends of the snap ring with the wide gap between the teeth. 11. INSTALL FRONT PLANETARY RING GEAR WITH SNAP RING While pushing down the ring gear, squeeze the snap ring end with snap ring pliers and install it into the groove. NOTE: When the snap ring is fully seated, the gap is the width of one lug. 12. INSTALL NYLON THRUST WASHER IN FRONT PLANETARY PINION GEAR Face the lugs downward and match them with the slots in back of the planetary pinion gear. 13. INSTALL ONE-WAY CLUTCH Install the one-way clutch into the outer race, facing the spring cage toward the front.