TM 10-3930-659-34 5-13.  TRANSMISSION OUTPUT SHAFT ASSEMBLY REPLACEMENT (Con’t). 20. Install output shaft (26) on transmission assembly (1). 21. Install shim (21) and retaining ring (22) on transmission assembly (1). 22. Using feeler gage, check for gap between bearing (28) and retaining ring (22).  If no gap exists, go to step 26. 23. Remove retaining ring (22) and shim (21) from transmission assembly (1).  Replace shim with new shim thickness required to eliminate gap.  Install new shim and retaining ring on transmission assembly. CAUTION Mark transmission output shaft pipe driver X in.  (15.9 mm) from end.  DO NOT install seals deeper than % in.  (15.9 mm).  Failure to follow this caution may damage seals. 24. Using soft hammer and transmission output shaft pipe driver, install seals (18 and 23) in transmission assembly (1). 25. Install new preformed packing (16) on yoke (17). 26. Install yoke (17) and spacer (15) on transmission assembly (1) with two screws (14). 27. Install new locking strap (13) on two screws (14). TA708310 5-130