Checking Fluid Level: I-Mark
WARNING: This page is about a different car, the 1988 Isuzu Trooper II, 1988 Isuzu Pickup, 1988 Isuzu Impulse, and 1988 Isuzu I-Mark. However, it is still accessible from the selected car via links, so may be relevant.
Remove speedometer driven gear assembly from case and wipe dry. Reinsert speedometer driven gear assembly into transaxle. Check oil level against the "H" and "L" markings on speedometer driven gear assembly bushing. Any reading between marks is acceptable. Install speedometer assembly.