What type of transmission fluid do you use in a 2000 Jeep Wrangler Sport 4.0 with manual transmission?
A 2000 Jeep Wrangler Sport 4.0 with a manual transmission uses GL-4 gear oil. The specific weight (like 75W-90 or 80W-90) might be specified in your owner's manual, but a GL-4 rated oil of that viscosity range is correct. Do not use GL-5 gear oil, as the additives in GL-5 can damage the synchronizers in a manual transmission.