What kind of transmission fluid to use on a 5 speed manual 1989 Saab 900 Turbo?
A 1989 Saab 900 Turbo with a 5-speed manual transmission typically uses SAE 80W-90 GL-4 gear oil. However, it's crucial to double-check your owner's manual. Saab sometimes specified particular brands or even slightly different viscosity grades depending on climate. Using the wrong fluid can damage your transmission.