Manual Transmission Oil Inspection

Inspect transmission case for evidence of oil leakage. Repair leaky point if any.
Make sure that vehicle is placed level for oil level check.
Remove level/filler plug (1) of transmission.
Check oil level.
Oil level can be checked roughly by means of level plug hole. That is, if oil flows out of level plug hole or if oil level is found up to hole when level/filler plug is removed, oil is properly filled. If oil is found insufficient, pour specified amount of specified oil.

Fig 1: Identifying Oil Level Filler Plug & Drain Plug
Courtesy of SUZUKI OF AMERICA CORP.
Tighten level/filler plug to specified torque referring to MANUAL TRANSMISSION OIL CHANGE .