TM   9-2320-289-34 6-5. FRONT AND REAR AXLE DIFFERENTIAL REPLACEMENT (M1009) (Con’t). 7 . Remove   bearing   preload   gage   (13),   spacer   if   installed,   shim   (5),   and   feeler   gage   (11). 8  . Measure   thickness   of   bearing   preload   gage   (13)   in   3   places   and   average   these   readings. Record  the  result. 9 . Measure   combined   thickness   of   spacer   if   present,   shim   (5),   and   feeler   gage   (11). 10. Using  example  given  in  Table  6-1,  determine  proper  thickness  of  each  shim  pack, Table  6-1.  Determining  Side  Bearing  Shim  Requirements OPPOSITE SIDE inches millimeters inches millimeters 0.250 In. 6.350 mm Thickness of bearing Combined total of 0.265 In. 6.731  mm preload tool required spacer,  service  shim, to force ring gear Into and feeler gage. contact with drive pln- Ion. TO MAINTAIN PROPER BACKLASH (0 .005 In. - -0.010  In. -0.254   mm 0.008 in. ) (0.127 mm - 0.2032 mm), ring gear is moved away from pinion by subtracting 0.010 in. + 0.010 in. 0.240 in. + 0.254 mm 6.096 mm (O .254 mm) shims from ring gear side and adding 0.275  in. 6.985  mm 0.010 in. (0.254 mm) shims to the opposite side. 1 +0.004 in. TO OBTAIN PROPER PRELOAD on side bearings, + 0.102 mm add 0.004 in. (0. 102 mm) to each side. + 0.004 in. +0.102 mm 0.244 in. 6.198 mm Shim  dimension  re- Shim  dimension  re- 0.279 in. 7.087  mm quired  for  ring  gear quired   for   opposite side, side. RING GEAR SIDE 11. If  present,  install  2  spacers  as  tagged,  between  bearing  cups  (6)  and  housing. NOTE l  Production   preloading   of   the   differential   side   bearings   (10)   is accomplished   by   use   of   cast   iron   preload   shims.   These   cannot   be reused  when  rebuilding  the  housing  as  they  may  break  when  tapped into   place.   Service   shims   may   be   reused   if   not   damaged. • Chamfered   side   of   shim   (5)   should   face   outward.   Shim   should   have sufficient   chamfer   or   lead   around   outside   diameter   to   allow   for   easy installation.   Additional   chamfer   on   shim   should   be   filed   or   ground   as required. 6-19