TM 10-3930-659-34 5-12.  TRANSMISSION CLUTCH PACKS AND IDLER GEAR MAINTENANCE (Con’t). (c) Install   bearing   cage   (69)   on   fourth   gear spur gear (70). (d) Install  thrust  disc  (72),  thrustwasher  (71), fourth gear spur gear (70), two thrustwashers (67  and  68),  and  shim  (66) on third/ fourth gear disc carrier (73). NOTE Use  thrust  disc  and  thrustwasher  from  second/reverse  gear  clutch  steps  (e)  through  (g).pack  to perform steps (e) through (g). (e) Position  thrust  disc  (67)  on  transmission assembly  (1)  over  third/fourth  gear  clutch pack port (102). (f) Position  thrustwasher  (64)  on  thrust  disc (67). (g) Using   depth   gage   micrometer,   measure and    note    distance    from    gasket    flange surface (101) to thrustwasher (64). TA708286 5-105