Transmission & Transfer Case (Amigo 4WD, Pickup 4WD, Rodeo & Trooper)
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1991 Isuzu Trooper, 1991 Isuzu Stylus, 1991 Isuzu Rodeo, 1991 Isuzu Pickup, and 1991 Isuzu Impulse. However, it is still accessible from the selected car via links, so may be relevant.
To check transmission and transfer case, ensure vehicle is level. Remove both fill plugs from transmission case and transfer case. See Fig 1 . Fluid level should be even with bottom of fill plug hole. Add fluid if necessary. Install and tighten fill plugs.