Checking the level is done through the fill plug located on the side of the transmission case. Jeep Wrangler Fluid Capacities - Extreme Terrain
The official recommendation is Mopar Manual Transmission Lubricant meeting Chrysler specification MS-9224 .
Standard service is generally recommended every or 24 months . However, if you frequently engage in the following, consider changing it every 15,000 to 30,000 miles : 2005 Wrangler Manual Transmission Fluid
Using the wrong fluid can lead to rough shifting or premature wear of the internal synchronizers.
Dust and water can contaminate the fluid. Checking the level is done through the fill
Many owners prefer high-performance synthetics to improve shift quality, especially in cold weather. Common choices include Redline MTL (specifically designed for these specs) or Pennzoil Synchromesh .
High heat breaks down the lubricant faster. 3. How to Check and Change Fluid However, if you frequently engage in the following,
Do not use standard GL-5 gear oil, as the sulfur additives can corrode the "yellow metal" synchronizers in the NSG370. 2. Maintenance Intervals