1995 Mazda 626 Problem shifting

Hey guys,

I have a Mazda 626 that is showing signs of the notorious AT issues this model has. When driving the car, it has a hard time getting into either second or third gear, requiring I rev to around 4k rpms or feather the throttle at that range to shift.

I went to try a pan drop and change the fluid/filter, but I can't find where it is, or if this will even fix it.

Is there any guess as to if cleaning the pan/fluid will fix this, and if so - How do I get at it? So far I just found the cap on the front to the electronics, but no fluid access. Any help would be great! Thanks.