What transmission oil do you use in a 1988 Ford Ranger 4x4 5spd?
The 1988 Ford Ranger 4x4 with a 5-speed manual transmission typically uses GL-3 or GL-4 75W-90 gear oil. However, always double-check your owner's manual. The specific weight and type might be listed there, and it's the definitive source. Using the wrong oil can damage your transmission.