TM 10-3930-659-34 4-35. TRANSMISSION LUBE PRESSURE TEST. 9. Remove transmission thermal bypass valve and check for restrictions (see TM 10-3930-659-20). 10. Remove pressure regulator and check piston for sticking (see paragraph 4-39). 11. Replace  transmission  assembly  (see  paragraph 4-40). 12. Remove  pressure  gage  (9)  and  hose  (8)  from adapter (5). 13. Remove  adapter  (5),  adapter  (4),  and  union  (3) from tee (1). 14. Remove two preformed packings (2) from union (3). Discard preformed packings. 15. Install  new  preformed  packing  (6)  and  plug  (7) on tee (1). FOLLOW-ON TASKS:  * •  Install  left  engine  lower  sideshield  (see  TM  10-3930- 659-20). • Install window washer tank bracket  (see  TM  10-3930- 659-20). 4-148