What kind of transmission fluid do you use for a 1998 Jeep Wrangler 5 speed?
A 1998 Jeep Wrangler with a 5-speed manual transmission uses gear oil, not transmission fluid. The specific type depends on the climate where you live. Check your owner's manual for the exact recommendation, but generally, a 75W-90 GL-5 gear oil is appropriate. Some owners prefer a synthetic 75W-90 GL-5 for improved performance and longevity. Always check your owner's manual for the specific recommendation from Jeep.