TM 10-3930-669-10 3-12.  TRANSMISSION OIL LEVEL CHECK. Transmission Oil Level Check. CAUTION f •  Transmission oil level must be checked while engine is running or oil level shown on dipstick may not reflect actual oil level in transmission. •  Transmission oil level must be checked when transmission is between 100 and 200'F (38-93°C) or oil level shown on dipstick may not reflect actual oil level in transmission. NOTE The  transmission  dipstick  has  two  scales;  hot  and  cold.    Use  the  cold  scale  for  "Before"  PMCS checks and the hot scale at all other times. (1) Open cab door (1) and engine access panel (2). (2) Remove transmission dipstick (3) from transmission dipstick tube (4). (3) Wipe oil from transmission dipstick (3). (4) Check oil level.  Oil level should be between ADD and FULL marks on transmission dipstick (3). (5) If  oil  level  is  not  within  proper  range,  add  oil  according  to  Lubrication  Order  (LO  10-3930-669-12)  as necessary. (6) Install transmission dipstick (3) into transmission dipstick tube (4). (7) Close engine access panel (2) and cab door (1). 3-19