2025 Jeep Wrangler Transmission Fluid & Service Spec

Quick Answer

• Transmission Make/Model: ZF 8HP75 (8-speed automatic)
• OEM Fluid Spec: ZF LifeguardFluid 8 or equivalent meeting Mopar ZF 8HP Automatic Transmission Fluid (P/N 68157995AB, 68218925AB, 68345736AA or similar, verify with dealer)
• Drain & Fill Capacity: Approximately 5.2 liters (5.5 quarts)
• Full Overhaul Capacity: Approximately 9.5 liters (10 quarts)
• Filter OEM Part Number: Integrated with the transmission oil pan. Verify exact Mopar part number for your specific build year with a dealer or service manual.
• Recommended Service Interval:
  • Normal Duty: Not officially serviceable by FCA for the life of the vehicle, but a proactive service at 60,000–80,000 miles is strongly recommended by transmission specialists.
  • Severe Duty / Towing: Proactive service at 40,000–60,000 miles is highly recommended.

Fluid Type Explained

The 2025 Jeep Wrangler models equipped with the 8-speed automatic transmission utilize the venerable ZF 8HP75 transmission. This advanced automatic transmission requires a very specific fluid to ensure its longevity and proper operation. The manufacturer, ZF, specifies ZF LifeguardFluid 8. For Mopar applications, this fluid is sold under various part numbers (P/N 68157995AB, 68218925AB, 68345736AA) which all meet the Chrysler/Mopar material specification for ZF 8HP transmissions. It is absolutely critical to use only this specified fluid or an aftermarket equivalent that explicitly states it meets or exceeds the ZF LifeguardFluid 8 specification. Using incorrect fluid can lead to premature wear, shift quality issues, and ultimately, transmission failure.

This fluid is a low-viscosity, synthetic blend engineered for extended drain intervals and optimal performance in modern, tightly controlled automatic transmissions. It provides excellent lubrication, consistent shift feel across varying temperatures, and long-term protection against wear and oxidation.

Service Procedure

Unlike older transmissions where a simple pan drop and filter change was common, servicing the ZF 8HP75 in a 2025 Jeep Wrangler is a more involved process. The transmission filter is integrated into the transmission oil pan itself, meaning the entire pan needs to be replaced during a fluid and filter service.

Drain & Fill:

A drain and fill is the most common service procedure. This involves draining the fluid from the pan, replacing the integrated filter pan, and refilling with new fluid. Due to the design, only a portion of the total fluid capacity is removed during a drain and fill (approximately 5.2 liters out of 9.5 liters total). The remaining old fluid stays within the torque converter and other internal components. While not a full fluid exchange, a regular drain and fill with pan/filter replacement is effective for maintaining fluid quality over time.

The refill process is also specific: the transmission must be at a precise operating temperature (typically between 30°C and 50°C or 86°F and 122°F, consult the service manual for exact specifications) and the vehicle level to accurately set the fluid level. This often requires diagnostic equipment to monitor transmission temperature and a specialized fill adapter.

Full Exchange:

A "full exchange" or "fluid flush" involves using a specialized machine to circulate new fluid through the transmission, effectively pushing out all the old fluid including that in the torque converter. While this replaces nearly 100% of the fluid, it's generally not recommended by ZF or Stellantis unless there