TN  10-3930-643-34 GENERAL  SUPPORT  TRANSMISSION  MAINTENANCE. 15-5. Second and Third Gear Assembly. (Sheet 14 of 17) ASSEMBLY 78. Insert guide pins at each oil hole slot. 79. Continue stacking plates (27 and 26) and springs (28) using guide Pins to properly aline teeth until all have been installed. When  properly alined, plate (29) will drop freely. 80. Install plate (25). Do not remove guide pins. 81. Using an adapter, gradually press plates and springs into housing (40). Do not press all at once. Press and release gradually in  1/4  inch increments to allow springs to seat properly. 82. When retaining ring groove of housing (40) is exposed, lock arbor press. 83. Using slip joint pliers, remove guide pins. 84. Install new retaining ring (24). Be sure that open space between new retaining ring (24) end does not aline with oil holes. Go to sheet 15 15-69