TM 10-3930-659-34 5-12. TRANSMISSION CLUTCH PACKS AND IDLER GEAR MAINTENANCE (Con’t). NOTE An audible click should be heard when compressed air is introduced in clutch pack port. 17. Using   compressed   air,   check   third/fourth   gear clutch pack (18) for piston function. 18. If removed, install three new spring pins (22, 23, and 24) in idler gear axle (10). NOTE Ensure  that  roller  bearings  do  not  extend beyond    idler    gear    when    angle    ring    is installed. 19. If  roller  set  (20)  was  removed,  apply  petrolatum to 28 bearing rollers. 20. Install roller set (20) and angle ring (21) on upper idler gear (11). 21. Install new preformed packing (19) on idler gear axle (10). TA708297 5-116