the fill port of the MTX is located on the front of the tansmision housing and has a 6 point internally whenching plug (allen wrench) It can be seen from looking rearward from the driverside of the front bumper.
The drain port uses the same size allen wrench as the fill and is located on the rear of the transmission housing near the driverside drive axle. *note, you may have to move the oxygen sensor harness clamp to gain access to the plug*
You will need to have a minimum of 3 quarts of ATF for manual transmision fluid change.
and yes, proper filling of the tansmission is done with the car level and fluid added until it drains from the fill port.
