Checking Fluid Level
WARNING: This page is about a different car, the 1989 Mazda B2600i and 1989 Mazda B2200. However, it is still accessible from the selected car via links, so may be relevant.
Fluid should be up to bottom of fill hole on side of case. B2600i models have 2 drain and 2 fill plugs in transmission case. Fluid should be up to bottom of rear fill hole on side of case. B2600i transfer case has separate drain and fill plugs.